CN114796711A - Double-layer sealed zero-pressure needle-free dosing connector - Google Patents
Double-layer sealed zero-pressure needle-free dosing connector Download PDFInfo
- Publication number
- CN114796711A CN114796711A CN202110109505.1A CN202110109505A CN114796711A CN 114796711 A CN114796711 A CN 114796711A CN 202110109505 A CN202110109505 A CN 202110109505A CN 114796711 A CN114796711 A CN 114796711A
- Authority
- CN
- China
- Prior art keywords
- sealing element
- way sealing
- double
- clamping groove
- convex column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 88
- 239000003814 drug Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000012377 drug delivery Methods 0.000 claims 1
- 238000001802 infusion Methods 0.000 abstract description 15
- 239000007788 liquid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a double-layer sealed zero-pressure needleless dosing connector which comprises a shell, an elastic sealing element, a one-way sealing element and a screw base, wherein the bottom end of the shell is provided with an annular connector clamping groove; the upper end of the screw base is inserted into the joint clamping groove; the elastic sealing element is arranged in the shell, and the inner part of the elastic sealing element is hollow; the bottom end face of the elastic sealing element is provided with an annular clamping groove and a convex column protruding downwards; the one-way sealing element is in a conical shape and is arranged in the screw base; the inner cavity of the one-way sealing element is a conical cavity, and a cutting seam is arranged at the bottom end of the one-way sealing element; the bottom end face of the elastic sealing element is tightly pressed on the top end face of the one-way sealing element, and the convex column is tightly inserted into the inner cavity of the one-way sealing element. The double-layer sealed zero-pressure needleless dosing connector can avoid pressure generation after infusion is finished, and improves the infusion comfort of a patient.
Description
Technical Field
The invention relates to a double-layer sealed zero-pressure needleless dosing connector.
Background
The existing needle-free infusion joint is divided into a positive pressure joint and a negative pressure joint, when the syringe is pulled out after infusion, the positive pressure joint can generate positive pressure inside the joint, so that liquid in a connecting pipe is automatically pushed forward, blood is prevented from flowing back into an indwelling needle, and thrombus is avoided being formed; when the infusion apparatus is pulled out after the infusion is finished, the negative pressure connector can generate negative pressure in the connector, so that blood in the patient can flow back, the patient can be frightened, and a plug can be generated to block an infusion channel in serious cases. Because the positive pressure joint and the negative pressure joint can generate certain pressure when the transfusion is finished, the blood vessel of the patient can generate liquid inlet or liquid outlet, and the discomfort of the patient can be easily caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a double-layer sealed zero-pressure needleless dosing connector which can avoid pressure generated when infusion is finished and improve the infusion comfort of a patient.
The technical scheme for realizing the purpose is as follows: the utility model provides a zero pressure needleless of double-deck sealed adds medicine and connects, includes shell, elastic seal, one-way sealing member and screw base, wherein:
the bottom end of the shell is provided with an annular joint clamping groove;
the upper end of the screw base is inserted into the joint clamping groove;
the elastic sealing element is arranged in the shell, and the interior of the elastic sealing element is hollow;
the bottom end face of the elastic sealing element is provided with an annular clamping groove and a convex column protruding downwards, the convex column and the clamping groove are coaxially arranged from inside to outside in sequence, and the convex column is in a conical shape;
the one-way sealing element is in a conical shape and is arranged in the screw base;
the inner cavity of the one-way sealing element is a conical cavity, and a cutting seam is arranged at the bottom end of the one-way sealing element;
the bottom end face of the elastic sealing element is tightly pressed on the top end face of the one-way sealing element, and the convex column is tightly inserted into the inner cavity of the one-way sealing element.
The double-layer sealed zero-pressure needleless dosing connector comprises a screw base, wherein an inner cavity of the screw base comprises a first cylindrical cavity, a conical cavity and a second cylindrical cavity which are sequentially connected from top to bottom, and the outer side of the top end of the one-way sealing element is turned over downwards to form a turned edge; the wall surface of the conical cavity is provided with a flanging clamping groove; the one-way sealing element is tightly inserted in the conical cavity, and the flange is clamped in the flange clamping groove.
In the double-layer sealed zero-pressure needleless dosing connector, the joint of the first cylindrical cavity and the conical cavity is provided with the boss; the lower part of the elastic sealing element is positioned in the first cylindrical cavity, and the boss is clamped in the clamping groove.
The double-layer sealed zero-pressure needleless dosing connector is characterized in that the angle of the convex column is 55-135 degrees; the angle of an inner cavity of the one-way sealing element is 50-125 degrees; and the angle of the convex column is 5-10 degrees larger than that of the inner cavity of the one-way sealing element.
The double-layer sealed zero-pressure needleless dosing connector is characterized in that the Shore A hardness of the convex column is 45-65; the Shore A hardness of the one-way sealing element is 35-55, and the Shore A hardness of the convex columns is 10-20 higher than that of the one-way sealing element.
The double-layer sealed zero-pressure needleless dosing connector is characterized in that the slit at the bottom end of the one-way sealing element is a cross slit or a straight slit.
The double-layer sealing type zero-pressure needleless dosing connector is characterized in that a sealing kerf is arranged at the top end of the elastic sealing element.
The double-layer sealed zero-pressure needleless dosing connector is characterized in that the top end face of the screw base is bonded with the bottom of the connector clamping groove through ultrasonic welding.
The double-layer sealed zero-pressure needleless dosing connector can avoid pressure generated when infusion is finished, and improves the infusion comfort of a patient.
Drawings
FIG. 1 is a three-dimensional structure view of the double-layer sealed zero-pressure needleless dosing connector of the present invention;
FIG. 2 is a cross-sectional view of the double-layer sealed zero-pressure needleless dosing adaptor of the present invention;
FIG. 3 is an exploded view of the double-layer sealed zero-pressure needleless dosing adaptor of the present invention;
FIG. 4 is a perspective view of the elastomeric seal;
FIG. 5 is a front view of the elastomeric seal;
FIG. 6 is an external structural view of the one-way seal;
FIG. 7 is a structural diagram of a straight slit of the one-way sealing element;
fig. 8 is a schematic view of a cross-slit structure of the one-way seal.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description is given with reference to the accompanying drawings:
referring to fig. 1 to 8, a preferred embodiment of the present invention is a double-layer sealed zero-pressure needleless drug-adding connector, which comprises a housing 1, an elastic sealing element 2, a one-way sealing element 4 and a screw base 5.
The elastic sealing member 2 is arranged in the shell 1; the interior of the elastic sealing member 2 is hollow; the top end of the elastic sealing member 2 is provided with a sealing slit 23 (see fig. 4) which effectively prevents bacteria from entering the liquid passage.
The bottom end face of the elastic sealing element 2 is provided with an annular clamping groove 21 and a convex column 22 (see fig. 5) protruding downwards, the convex column 22 and the clamping groove 21 are coaxially arranged from inside to outside in sequence, and the convex column 22 is in a conical shape; the one-way sealing element 4 is in a conical shape, and the one-way sealing element 4 is arranged in the screw base 5.
The inner cavity of the screw base 5 comprises a first cylindrical cavity 51, a conical cavity 52 and a second cylindrical cavity 53 which are sequentially connected from top to bottom, and the outer side of the top end of the one-way sealing element 4 is turned downwards to form a flange 41; the wall surface of the conical cavity 52 is provided with a flanging clamping groove 54; the one-way sealing element 4 is tightly inserted in the conical cavity 52, and the flange 41 is clamped in the flange clamping groove 54. The connection part of the first cylindrical cavity 51 and the conical cavity 52 is provided with a boss 55, the lower part of the elastic sealing element 2 is positioned in the first cylindrical cavity 51, and the boss 55 is clamped in the clamping groove 21.
The inner cavity of the one-way sealing element 4 is a conical cavity, and the bottom end of the one-way sealing element 4 is provided with a cutting seam 42; the cutting slits 42 are cross cutting slits (see fig. 8) or straight cutting slits (see fig. 7); the bottom end face of the elastic sealing element 2 is pressed on the top end face of the one-way sealing element 4, so that the one-way sealing element 4 is prevented from rotating, and meanwhile, the whole system is in a sealing state. The convex column 22 is tightly inserted in the inner cavity of the one-way sealing element 4.
The angle of the convex column 22 is 55-135 degrees; the angle of the inner cavity of the one-way sealing element 4 is 50-125 degrees; and the angle of the convex column 22 is 5-10 degrees larger than that of the inner cavity of the one-way sealing element 4. Therefore, the convex column 22 of the elastic sealing element 2 can be better and more smoothly attached to the inclined plane of the inner cavity of the one-way sealing element 4 in the downward moving process, so that the cross or straight joint of the one-way sealing element 4 is perfectly unfolded.
The Shore A hardness of the convex column 22 is 45-65; the Shore A hardness of the one-way sealing element 4 is 35-55, and the Shore A hardness of the convex column 22 is 10-20 greater than that of the one-way sealing element 4. Therefore, the cross or straight cutting seam of the one-way sealing element 4 can be more smoothly and perfectly unfolded in the downward moving process of the convex column 22 of the elastic sealing element 2.
When the double-layer sealed zero-pressure needleless dosing connector is used, when the connector end is connected with an infusion apparatus, the elastic sealing element 2 can move downwards under the extrusion force, so that the convex column 22 downwards props open a cross or straight kerf of the one-way sealing element 4, the inner cavity of the elastic sealing element 2 is communicated with the inner cavity of the screw base 5, and a liquid inner channel is opened; when the infusion set is disconnected, the elastic sealing element 2 rebounds, the convex column 22 moves upwards, and the cross-shaped or straight-shaped cutting seam of the one-way sealing element 4 naturally closes and blocks the liquid passage. The inner channel is almost in a zero pressure state in the whole process, and liquid backflow and pressure difference phenomena cannot be generated.
In conclusion, the double-layer sealed zero-pressure needleless dosing connector can avoid pressure generation after infusion is finished and improve the infusion comfort of a patient by matching the elastic sealing element and the one-way sealing element.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a double-deck sealed zero pressure does not have needle and adds medicine and connects which characterized in that, includes shell, elastic seal, one-way sealing member and screw base, wherein:
the bottom end of the shell is provided with an annular joint clamping groove;
the upper end of the screw base is inserted into the joint clamping groove;
the elastic sealing element is arranged in the shell, and the interior of the elastic sealing element is hollow;
the bottom end face of the elastic sealing element is provided with an annular clamping groove and a convex column protruding downwards, the convex column and the clamping groove are coaxially arranged from inside to outside in sequence, and the convex column is in a conical shape;
the one-way sealing element is in a conical shape and is arranged in the screw base;
the inner cavity of the one-way sealing element is a conical cavity, and a cutting seam is arranged at the bottom end of the one-way sealing element;
the bottom end face of the elastic sealing element is tightly pressed on the top end face of the one-way sealing element, and the convex column is tightly inserted into the inner cavity of the one-way sealing element.
2. The double-layer sealed zero-pressure needleless dosing connector according to claim 1, wherein the inner cavity of the screw base comprises a first cylindrical cavity, a conical cavity and a second cylindrical cavity which are sequentially connected from top to bottom, and the outer side of the top end of the one-way sealing element is turned over downwards to form a flange; the wall surface of the conical cavity is provided with a flanging clamping groove; the one-way sealing element is tightly inserted in the conical cavity, and the flange is clamped in the flange clamping groove.
3. The double-layer sealed zero-pressure needleless dosing connector according to claim 2, wherein a boss is arranged at the joint of the first cylindrical cavity and the conical cavity; the lower part of the elastic sealing element is positioned in the first cylindrical cavity, and the boss is clamped in the clamping groove.
4. The double-layer sealed zero-pressure needleless dosing connector according to claim 1, wherein the angle of the convex column is 55-135 °; the angle of an inner cavity of the one-way sealing element is 50-125 degrees; and the angle of the convex column is 5-10 degrees larger than that of the inner cavity of the one-way sealing element.
5. The double-layer sealed zero-pressure needleless dosing connector according to claim 1, wherein the Shore A hardness of the convex column is 45-65; the Shore A hardness of the one-way sealing element is 35-55, and the Shore A hardness of the convex column is 10-20 larger than that of the one-way sealing element.
6. The double-layer sealed zero-pressure needleless dosing connector of claim 1, wherein the slit at the bottom end of the one-way sealing element is a cross slit or a straight slit.
7. The double-layer sealed zero-pressure needleless drug delivery adaptor of claim 1, wherein the top end of the elastic sealing member is provided with a sealing slit.
8. The double-layer sealed zero-pressure needleless dosing connector of claim 1, wherein the top end surface of the screw base and the groove bottom of the connector clamping groove are bonded together by ultrasonic welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109505.1A CN114796711A (en) | 2021-01-27 | 2021-01-27 | Double-layer sealed zero-pressure needle-free dosing connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109505.1A CN114796711A (en) | 2021-01-27 | 2021-01-27 | Double-layer sealed zero-pressure needle-free dosing connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114796711A true CN114796711A (en) | 2022-07-29 |
Family
ID=82525044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110109505.1A Pending CN114796711A (en) | 2021-01-27 | 2021-01-27 | Double-layer sealed zero-pressure needle-free dosing connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114796711A (en) |
-
2021
- 2021-01-27 CN CN202110109505.1A patent/CN114796711A/en active Pending
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