A positive and negative pressure needle-free rubber valve connector

Abstract

The present invention relates to the field of medical supplies, and discloses a positive and negative pressure needle-free rubber valve connector. The connector includes a rubber valve, an upper shell and a lower shell. A top cover is provided on the top of the rubber valve, a cavity is provided inside, an opening is provided on the top of the upper shell, a liquid outlet is provided on the bottom of the lower shell, the liquid outlet is connected to the cavity, the opening is tightly attached to the top cover in the upper shell of the rubber valve, the upper shell and the lower shell are fixedly connected, the bottom edge of the rubber valve is attached to the inner wall of the lower shell, an annular liquid retention cavity is provided between the rubber valve and the upper shell, and a thickening layer is provided in the cavity along the longitudinal direction of the rubber valve, and the thickening layer starts from the lower end face of the top cover. The rubber valve in this connector can be tilted in a fixed direction, thereby solving the problem of difficult and unstable insertion of the injection port.

Description

Technical Field

[0001] The invention relates to the field of medical supplies, and in particular to a positive and negative pressure needle-free rubber valve connector. Background Art

[0002] In recent years, with the innovation and development of technology, a wide variety of needle-free infusion connectors focusing on safe injection have been introduced. Needle-free infusion connectors have also gone through the early blunt needle design, complex mechanical valves to today's simple and transparent positive pressure needle-free connectors. In the existing design, the tilt direction of the internal valve of this needle-free connector is not fixed, and the user often needs a long time to insert the injection port into the needle. At the same time, due to the unfixed tilt direction of the valve, the injection port insertion is unstable, and there are problems such as leakage. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a needle-free connector with a glue valve capable of tilting in a fixed direction, thereby solving the problem that the injection port is difficult and unstable to insert.

[0004] In order to solve the above problems, the present invention provides the following technical solutions: a positive and negative pressure needle-free glue valve connector is provided, comprising a glue valve, an upper shell and a lower shell;

[0005] The rubber valve comprises an upper half, a lower half and an inclined shoulder, the radius of the upper half is smaller than that of the lower half, the upper half and the lower half are coaxial, and are fixedly connected by the inclined shoulder, a top cover is provided at the top of the upper half, and a cavity is provided at the upper half and the lower half of the rubber valve;

[0006] The upper shell includes a head, a tail and an inclined wall. The radius of the head is smaller than that of the tail. The head and the tail are coaxial and fixedly connected by the inclined wall. The top of the head is provided with an opening.

[0007] The bottom of the lower shell is provided with a liquid outlet, and the liquid outlet is communicated with the cavity;

[0008] The upper half of the rubber valve is placed in the head of the upper shell, the opening is in close contact with the top cover, the lower half of the rubber valve is placed in the tail of the upper shell, the oblique shoulder is in close contact with the oblique wall, the upper shell is fixedly connected to the lower shell, the bottom edge of the lower half of the rubber valve is in close contact with the inner wall of the lower shell, and an annular liquid retention chamber is provided between the lower half of the rubber valve and the tail of the upper shell;

[0009] A thickening layer is arranged in the cavity along the longitudinal direction of the rubber valve, and the thickening layer starts from the lower end surface of the top cover.

[0010] Furthermore, a positioning hole is provided in the lower half of the glue valve, the positioning hole is on the same longitudinal line as the thickened layer, and the positioning hole is a through hole or a blind hole.

[0011] Furthermore, the glue valve is provided with a liquid flow hole, and the liquid flow hole is opposite to the thickening layer.

[0012] Furthermore, the thickened layer ends at the lower half of the rubber valve.

[0013] Furthermore, the inner wall of the lower half of the rubber valve is a bell mouth with a large opening facing downwards.

[0014] Furthermore, the lower edge of the top cover is a curved surface.

[0015] Furthermore, the liquid outlet is provided with a Luer connector.

[0016] Beneficial effects of the present invention:

[0017] 1. Provide a positive and negative pressure needle-free valve connector. Through the thin-wall and thick-wall design of the internal valve, the valve can be tilted in a fixed direction, thereby solving the problem of difficult and unstable insertion of the injection port.

[0018] 2. The sealing design between the top cover and the upper shell opening can prevent the invasion of bacteria. At the same time, the lower edge of the top cover is set into an arc shape, which can effectively reduce the resistance when the valve rebounds.

[0019] 3. By setting a flow hole on the thin wall of the valve, the drug flow rate can be increased.

[0020] 4. By setting positioning holes on the thick wall of the valve, the valve can be better tilted and deformed in a fixed direction.

[0021] 5. Set the tilt angle on the side wall of the valve to make the drug flow more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional view of an embodiment of the present invention;

[0023] Reference numerals in the figure: glue valve 1, top cover 11, cavity 12, thickened layer 13, liquid flow hole 15, positioning hole 16, inclined shoulder 17, upper shell 2, opening 21, liquid retention cavity 22, inclined wall 23, lower shell 3, liquid outlet 31. DETAILED DESCRIPTION

[0024] like Figure 1 The embodiment shown is the positive and negative pressure needle-free glue valve connector of the invention, comprising a glue valve 1, an upper shell 2 and a lower shell 3.

[0025] The rubber valve 1 includes an upper part, a lower part and an inclined shoulder 17. The radius of the upper part is smaller than that of the lower part. The upper part and the lower part are coaxial and fixedly connected by the inclined shoulder 17. A top cover 11 is provided at the top of the upper part, and the lower edge of the top cover 11 is an arc surface. The inner wall of the lower part of the rubber valve 1 is a bell mouth with a large mouth facing downward, and a cavity 12 is provided in the upper and lower parts. A thickening layer 13 is provided in the cavity 12 along the longitudinal direction of the rubber valve 1. The thickening layer 13 starts from the lower end surface of the top cover 11 and ends at the middle of the lower part. A positioning hole 16 and a liquid flow hole 15 are provided in the lower part of the rubber valve 1. The positioning hole 16 is on the same longitudinal line as the thickening layer 13. The positioning hole 16 can be a through hole or a blind hole. The liquid flow hole 15 and the positioning hole 16 are staggered and opposite to each other up and down.

[0026] The upper shell 2 includes a head, a tail and an inclined wall 23. The radius of the head is smaller than that of the tail. The head and the tail are coaxial and fixedly connected by the inclined wall 23. An opening 21 is provided at the top of the head.

[0027] A liquid outlet 31 is provided at the bottom of the lower shell 3, the liquid outlet 31 is communicated with the cavity 12, and a Luer connector is provided at the periphery. The Luer connector is connected to a hose.

[0028] The upper half of the rubber valve 1 is placed in the head of the upper shell 2, the opening 21 is tightly attached to the top cover 11, the lower half of the rubber valve 1 is placed in the tail of the upper shell 2, the oblique shoulder 17 is tightly attached to the oblique wall 23, the upper shell 2 and the lower shell 3 are connected by snaps, the bottom edge of the lower half of the rubber valve 1 is attached to the inner wall of the lower shell, and the rubber valve 1 will separate from each other when it is compressed and deformed. An annular gap is provided between the upper half of the rubber valve 1 and the head of the upper shell 2, and an annular liquid retention chamber 22 is provided between the lower half of the rubber valve 1 and the tail of the upper shell 2.

[0029] When in use, the top cover of the valve 1 is squeezed through the injection port, and the valve 1 is positioned at the positioning hole 16, with the bottom end of the thickened layer 13 as the fulcrum, and tilted and deformed in opposite directions, the volume of the cavity 12 in the valve 1 shrinks, the oblique shoulder 17 is separated from the oblique wall 23, and the drug flows from the opening 21 along the side wall of the valve 1 into the liquid retention cavity 22.

[0030] The present invention has two positive pressure modes. In the first positive pressure mode, the liquid flow hole 15 is arranged opposite to the positioning hole 16 of the glue valve 1. At this time, the medicine retained in the liquid retention cavity 22 will enter the inner cavity of the glue valve 1 along the liquid flow hole 15. When the injection is about to end, the hose arranged outside the liquid outlet 31 is clamped, and then the injection port is pulled out, and the glue valve 1 returns to its original state. At this time, there is no backflow in the hose, forming a positive pressure. The second positive pressure mode is different from the first one in that the liquid flow hole 15 is not arranged opposite to the positioning hole 16. Because the glue valve 1 is pressed and tilted and deformed with the bottom of the thickened layer 13 as the fulcrum, the bottom of the glue valve 1 will separate from the lower shell to form a small liquid flow channel, and the medicine in the liquid retention cavity 22 will enter the cavity inside the glue valve 1 along the liquid flow channel.

[0031] The negative pressure method of the present invention is different from the positive pressure method in that when the injection is about to end, the connecting tube arranged outside the liquid outlet 31 is not clamped. At this time, the injection port is pulled out, the glue valve 1 returns to its original state, the volume of the cavity 12 increases, and the drug is sucked into the inner cavity of the glue valve 1 along the liquid outlet 31, forming drug reflux.

Claims

1. A positive and negative pressure needle-free glue valve connector, comprising a glue valve (1), an upper shell (2) and a lower shell (3); the glue valve (1) comprises an upper half, a lower half and an inclined shoulder (17); the radius of the upper half is smaller than that of the lower half; the upper half and the lower half are coaxial and fixedly connected by the inclined shoulder (17); the top of the upper half is provided with a top cover (11); the upper and lower halves of the glue valve (1) are provided with a cavity (12); the upper shell (2) comprises a head, a tail and an inclined wall (23); the radius of the head is smaller than that of the tail; the head and the tail are coaxial and fixedly connected by the inclined wall (23); the top of the head is provided with an opening (21) ; The bottom of the lower shell (3) is provided with a liquid outlet (31), and the liquid outlet (31) is communicated with the cavity (12); the upper half of the glue valve (1) is placed in the head of the upper shell (2), the opening (21) is in close contact with the top cover (11), the lower half of the glue valve (1) is placed in the tail of the upper shell (2), the inclined shoulder (17) is in close contact with the inclined wall (23), the upper shell (2) and the lower shell (3) are fixedly connected, the bottom edge of the lower half of the glue valve (1) is in contact with the inner wall of the lower shell, and an annular liquid retention chamber (22) is provided between the lower half of the glue valve (1) and the tail of the upper shell (2); characterized in that, A thickening layer (13) is arranged in the cavity (12) along the longitudinal direction of the glue valve (1), the thickening layer (13) starts from the lower end surface of the top cover (11), a positioning hole (16) is arranged in the lower half of the glue valve (1), the positioning hole (16) and the thickening layer (13) are on the same longitudinal line, the positioning hole (16) is a through hole or a blind hole, and a liquid flow hole (15) is arranged on the glue valve (1), the liquid flow hole (15) and the thickening layer (13) are opposite in position; The positioning hole (16) is arranged below the thickened layer (13), and the liquid flow hole (15) is located below the positioning hole (16); There is a distance between the outer periphery of the upper half of the rubber valve (1) and the corresponding inner wall surface of the upper shell.

2. The positive and negative pressure needle-free valve connector according to claim 1, characterized in that: The head of the glue valve cavity (12) is semicircular.

3. The positive and negative pressure needle-free valve connector according to claim 1, characterized in that: The thickened layer (13) ends at the lower half of the glue valve (1).

4. The positive and negative pressure needle-free valve connector according to claim 1, characterized in that: The inner wall of the lower half of the rubber valve (1) is a bell mouth with a large opening facing downwards.

5. The positive and negative pressure needle-free valve connector according to claim 1, characterized in that: The lower edge of the top cover (11) is a curved surface.

6. The positive and negative pressure needle-free valve connector according to claim 1, characterized in that: The liquid outlet (31) is provided with a Luer connector.

Images