CN113855561B - Self-sealing puncture outfit with low starting force - Google Patents
Self-sealing puncture outfit with low starting force Download PDFInfo
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- CN113855561B CN113855561B CN202111189264.2A CN202111189264A CN113855561B CN 113855561 B CN113855561 B CN 113855561B CN 202111189264 A CN202111189264 A CN 202111189264A CN 113855561 B CN113855561 B CN 113855561B
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- Prior art keywords
- sealing
- air inlet
- cap
- self
- puncture outfit
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- 238000007789 sealing Methods 0.000 title claims abstract description 105
- 239000007788 liquid Substances 0.000 claims abstract description 65
- 239000012528 membrane Substances 0.000 claims abstract description 48
- 239000003814 drug Substances 0.000 claims abstract description 38
- 230000000149 penetrating effect Effects 0.000 claims abstract description 12
- 239000000428 dust Substances 0.000 claims description 23
- 238000001914 filtration Methods 0.000 claims description 12
- 239000002872 contrast media Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 241001411320 Eriogonum inflatum Species 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 101100491335 Caenorhabditis elegans mat-2 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2006—Piercing means
- A61J1/201—Piercing means having one piercing end
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2068—Venting means
- A61J1/2072—Venting means for internal venting
-
- 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
- A61M5/007—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 for contrast media
-
- 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
- A61M5/162—Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube
- A61M5/1626—Needle protectors therefor
-
- 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
- A61M5/162—Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube
- A61M2005/1623—Details of air intake
Abstract
The application discloses a low-starting-force self-sealing puncture outfit, which comprises a puncture outfit body and a dustproof cap, wherein the puncture outfit body is provided with an air inlet, an air outlet, a liquid inlet, a liquid outlet, an air inlet channel and a liquid medicine channel, the air inlet is connected with the air outlet through the air inlet channel, the liquid inlet is connected with the liquid outlet through the liquid medicine channel, the dustproof cap is arranged on the air inlet, the dustproof cap is provided with a connecting channel and also comprises a self-sealing rubber pad capable of controlling the on-off of the connecting channel, the self-sealing rubber pad is provided with a sealing part and an elastic membrane capable of deforming when being pressed, the sealing part is fixed in the connecting channel, the central part of the elastic membrane is provided with a valve port penetrating along the direction of a second axis, and a center column is arranged in the connecting channel. The liquid medicine container can form reverse sealing under a standing state, so that the liquid medicine cannot enter the air inlet channel due to the reverse pressure generated by puncturing the liquid medicine container, and further the air inlet channel is effectively prevented from being blocked by the liquid medicine.
Description
Technical Field
The application relates to the field of medical instruments, in particular to a puncture outfit.
Background
There are generally two types of existing puncture outfits: firstly, the air inlet channel is only plugged by a filter membrane, and the filter membrane has the function of filtering particles in the atmosphere and preventing the particles from entering a liquid medicine container during medicine suction; when the puncture outfit is inserted into a liquid medicine container, a certain amount of liquid counter pressure is usually generated, because the filtering membrane has no plugging capability, the liquid forming the counter pressure flows out along with the air inlet channel, the air inlet channel is blocked after a long time, and particularly when the puncture outfit is used for sucking contrast agent, the air inlet channel is blocked because the contrast agent contacts with the outside air, crystals can be formed within a few minutes, and the air cannot be sucked when the liquid medicine is sucked again, so that medicine suction difficulty and functional failure are caused. Secondly, the air inlet channel is provided with a one-way airtight valve, but because the starting pressure is large, the air inlet channel is difficult to open, the liquid medicine is difficult to suck, the medicine sucking time is too long, and the clinical efficiency is influenced. Therefore, it is necessary to provide a new puncture outfit.
Disclosure of Invention
The application provides a novel low-starting-force self-sealing puncture outfit.
The application provides a low-starting-force self-sealing puncture outfit, which comprises a puncture outfit body with a first axis and a dustproof cap with a second axis, wherein the tip part of the puncture outfit body is provided with an air outlet and a liquid inlet, the tail part of the puncture outfit body is provided with a liquid outlet, the side part of the puncture outfit body is provided with an air inlet, the puncture outfit body is also provided with an air inlet channel and a liquid medicine channel which are arranged along the first axis direction and are separated, the air inlet and the air outlet are connected through the air inlet channel, the liquid inlet and the liquid outlet are connected through the liquid medicine channel, the dustproof cap is arranged at the air inlet, the dustproof cap is provided with a connecting channel penetrating along the second axis direction, the connecting channel is connected with the air inlet channel and the outside atmosphere, the self-sealing rubber pad capable of controlling the connection and disconnection of the connecting channel is further provided with a sealing part and an elastic membrane capable of deforming when being pressed, the sealing part is fixed in the connecting channel, the central part of the elastic membrane is provided with a valve port penetrating along the second axis direction, and a central column is arranged in the connecting channel, when the connecting channel is tightly attached to the central column, and the central column is tightly closed, and the valve port is connected with the central column in a normal state; when in imbibition, under the action of the forward pressure of the external atmosphere, the elastic membrane deforms to enable the valve port to be separated from the central column, so that the connecting channel is conducted, and the air inlet channel is communicated with the external atmosphere; and the thickness of the sealing part is larger than that of the elastic film.
When in a static state, the valve port is normally closed. When the liquid medicine is sucked, the valve port is opened. The self-sealing rubber cushion controls the on-off of the connecting channel through the opening and closing of the valve port. The self-sealing rubber cushion is fixed inside the connecting channel. When normally closed, the central column is propped against the elastic membrane and closes the valve port of the elastic membrane. The sealing part can be tightly matched with the inner wall of the connecting channel, so that the fixation and sealing between the self-sealing rubber pad and the dustproof cap are realized. The air inlet has a length and an axis of the air inlet may be perpendicular to the first axis. The air inlet may be coaxial with the dust cap.
The end face of the central column is a sealing end face, and in a normal state, the sealing end face is in surface contact with the elastic membrane.
The central part is provided with a groove, and in a normal state, the end part of the central column is inserted into the groove.
The sealing part is a cylindrical body penetrating along the second axis direction, the inner opening of the sealing part is open, and the edge of the outer opening of the sealing part is connected with the central part through wavy folds. The inner opening is an opening near the side of the puncture outfit body, and the outer opening is an opening far away from the side of the puncture outfit body. The longitudinal section of the pleat is wavy, the longitudinal section passing through the second axis. The pleats have high points and low points.
The low point of the pleat is flush with the inner surface of the central portion. The central portion has opposed inner and outer surfaces through which the valve port extends. The inner surface is planar. The plane in which the inner surface lies passes through the low point.
The thickness of the folds is smaller than the thickness of the central portion, and the thickness of the central portion is smaller than the thickness of the sealing portion. The thickness of the sealing portion may be more than twice the thickness of the folds.
The thickness of the folds is 0.1-0.15 mm.
The dustproof cap comprises an inner cover, an outer cover and an air filtering membrane, wherein the outer cover and the inner cover are both fixed on the air inlet, and the air filtering membrane is fixed between the bottom end face of the outer cover and the top end face of the inner cover. The inner cap and the outer cap each have opposite bottom and top end surfaces. The bottom end face is the end face close to the side part of the puncture outfit body, and the top end face is the end face far away from the side part of the puncture outfit body.
The dustproof cap further comprises a base, the base is fixed to the air inlet, the base is a cylindrical body with a bottom, the base and the inner cover are in butt joint and fixed, the self-sealing rubber pad is fixed between the inner cover and the base, and the connecting channel penetrates through the outer cover, the inner cover and the base. The outer cover is in butt joint with the inner cover and is fixed, and the inner cover is in butt joint with the base and is fixed. In the direction along the second axis, the outer cover, the inner cover and the base are sequentially arranged.
The outer cap has a plurality of outer cap through holes about the second axis, the inner cap has a plurality of inner cap through holes about the second axis, and the base has a plurality of base through holes about the second axis, one for each of the outer cap through holes and one for the base through holes. Each through hole is eccentrically disposed with respect to the second axis. Each through hole is communicated with the corresponding through hole in an aligned way.
The beneficial effects of the application are as follows: the liquid medicine container can form reverse sealing in a standing state, so that the reverse pressure generated by piercing the liquid medicine container can not enable the liquid medicine to enter the air inlet channel, and further the liquid medicine is effectively prevented from blocking the air inlet channel; because the thickness of the elastic membrane is smaller than that of the sealing part, the starting force for opening the valve port can be effectively reduced, so that the air inlet channel is easier to open, and the medicine suction time can be effectively shortened.
Drawings
FIG. 1 is a cross-sectional view of the low actuation force self-sealing spike of the present embodiment;
fig. 2 is a perspective view of the self-sealing rubber pad of the present embodiment;
fig. 3 is a cross-sectional view of the self-sealing rubber pad of the present embodiment;
fig. 4 is a perspective view of the outer cover of the dust cap of the present embodiment;
fig. 5 is a perspective view of the inner cap of the dust cap of the present embodiment;
fig. 6 is a cross-sectional view of the inner cap of the dust cap of the present embodiment;
fig. 7 is a perspective view of the base of the dust cap of the present embodiment;
fig. 8 is a cross-sectional view of the base of the dust cap of the present embodiment;
FIG. 9 is a cross-sectional view reflecting the mating relationship of the inner cap and the self-sealing rubber mat in a rest state;
fig. 10 is a cross-sectional view showing the fitting relationship of the inner cap and the self-sealing rubber pad in the liquid-sucking state.
Detailed Description
The application will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present application have not been shown or described in the specification in order to avoid obscuring the core portions of the present application, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments, and the operational steps involved in the embodiments may be sequentially exchanged or adjusted in a manner apparent to those skilled in the art. Accordingly, the description and drawings are merely for clarity of describing certain embodiments and are not necessarily intended to imply a required composition and/or order.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.
As shown in fig. 1 to 10, a low-actuation-force self-sealing puncture outfit comprises a puncture outfit body 1 and a dust cap 3. The puncture outfit body 1 has a first axis, and a tip of the puncture outfit body is provided with an air outlet 12 and a liquid inlet 11, and can puncture a bottle stopper of a liquid medicine container. The tail part 17 of the puncture outfit body is provided with a liquid outlet 13, and the liquid outlet 13 can be connected with a liquid medicine hose. The side 18 of the spike body is provided with an air inlet 14. The puncture device body 1 is further provided with an air inlet channel 15 and a liquid medicine channel 16 which are arranged along the first axis direction, the air inlet channel 15 is connected with the air inlet 14 and the air outlet 12, the liquid medicine channel 16 is connected with the liquid inlet 11 and the liquid outlet 13, and the air inlet channel 15 and the liquid medicine channel 16 are separated.
The dust cap 3 is mounted on the air inlet 14 of the puncture outfit body 1. The dust cap 3 may have a second axis and a connection passage 35 penetrating inside and outside in the direction of the second axis, the connection passage 35 being capable of connecting the outside atmosphere and the intake passage 15. An air filter membrane 34 is provided in the connection passage 35, and the air filter membrane 34 can filter particles of a specific size and inhibit bacteria, thereby preventing the particles from entering the chemical liquid container through the air intake passage 15.
The connection channel 35 is provided with a self-sealing rubber pad 2, the self-sealing rubber pad 2 is provided with a cylindrical sealing part 21 and an elastic membrane 22 capable of deforming when being subjected to pressure, the sealing part 21 is fixed inside the connection channel 35, the sealing part 21 is a structure body penetrating inside and outside along the second axis direction, the elastic membrane 22 seals the outer opening of the sealing part 21, namely, the sealing part 21 is a cylindrical body with an open inner opening and an outer opening sealed by the elastic membrane. The side of the sealing portion 21 closer to the puncture instrument body side portion 18 is the inner side, and the side farther from the puncture instrument body side portion 18 (i.e., the side closer to the outside atmosphere) is the outer side. The elastic membrane 22 has a central portion 23, the central portion 23 having a valve port 24 penetrating inside and outside in the second axial direction, the central portion 23 being capable of being connected to the top edge of the sealing portion 21 by a fold 25. A central post 326 is disposed within the connecting passage 35, the central post 326 having a sealing end surface 328, the sealing end surface 328 having a dimension greater than the dimension of the elastomeric membrane port 24.
When the medical liquid is still, i.e. when the medical liquid is not sucked, the valve port 24 is normally closed, in this state, the elastic membrane 22 is tightly attached to the central column 326, and the sealing end surface 328 of the central column plugs the valve port 24 of the elastic membrane, so that the valve port 24 is closed, and the connecting channel 35 is disconnected. When the liquid medicine is sucked, the elastic membrane 22 receives the forward pressure (the pressure in the direction indicated by the arrow a) of the external atmosphere, and under the action of the pressure, the elastic membrane 22 deforms, the valve port 24 thereof is separated from the center post 326, the valve port 24 is opened, the connection channel 35 is conducted, and the external atmosphere can enter the liquid medicine container through the connection channel 35 and the air inlet channel 15. In addition, when the stopper of the medical fluid container is pierced, a reverse pressure (a pressure in the direction indicated by the arrow B) is generated, and the elastic membrane 22 is only brought into close contact with the center post 326, so that the contrast agent can be effectively prevented from flowing out in the reverse direction.
In the present embodiment, the first axis of the puncture instrument body 1 may be perpendicular to the second axis of the dust cap 3. The dust cap 3 may be mounted on the puncture outfit body near the tail 17. The sealing part 21 of the self-sealing rubber pad can be fixed and matched with the inner wall of the connecting channel 35 in a sealing way, the elastic membrane 22 of the self-sealing rubber pad can be used for controlling the on-off of the connecting channel 35, the thickness of the sealing part 21 is larger than that of the elastic membrane 22, and the thickness of the elastic membrane 22 is usually 0.1-0.15 mm. The thickness of the sealing portion 21 is 2 to 3 times the thickness of the elastic film 22.
As shown in fig. 1 to 10, a low-starting-force self-sealing puncture outfit comprises a puncture outfit body 1, a self-sealing rubber pad 2 and a dust cap 3.
The puncture instrument body 1 comprises a tip portion, a tail portion 17 and a side portion 18. The tip can pierce the bottle stopper of the liquid medicine container, and is provided with an air outlet 12 and a liquid inlet 11. The tail 17 is provided with a liquid outlet 13, and the liquid outlet 13 can be connected with a liquid medicine hose. The side portion 18 is provided with an air inlet 14. The puncture outfit body 1 is also provided with an air inlet channel 15 and a liquid medicine channel 16, the air inlet channel 15 is connected with the air inlet 14 and the air outlet 12, and the liquid medicine channel 16 is connected with the liquid inlet 11 and the liquid outlet 13. The air intake passage 15 and the liquid medicine passage 16 are each provided along the first axial direction of the puncture body 1, and the air intake passage 15 and the liquid medicine passage 16 are partitioned. In the direction along the first axis, the air outlet 12 may be higher than the liquid inlet 11, and the liquid inlet 11 may be higher than the air inlet 14. The air outlet 12 and the liquid inlet 11 may be located on both sides of the first axis, respectively.
The air inlet 14 has a certain length, and the dust cap 3 is fixed in the air inlet 14. The dust cap 3 has a connection channel 35 arranged in the direction of the second axis, which connection channel 35 is capable of connecting the outside atmosphere with the air intake channel 15 of the piercer body. The second axis of the dust cap 3 may be perpendicular to the first axis of the spike body 1.
The dust cap 3 includes an outer cover 33, an inner cover 32, an air filtering membrane 34, and a base 31. The outer cover 33 is shaped and sized to match the air inlet 14 of the spike body, and the outer cover 33 is secured to the air inlet 14. The cover 33 is a structure penetrating in and out in the second axis direction, and the inner space thereof is partitioned by a partition wall into a plurality of cover through holes 331, and the cover through holes 331 are uniformly distributed at equal angular intervals around the second axis, i.e., the axis of each cover through hole 331 is disposed eccentrically with respect to the second axis. The inner lid 32 has a cylindrical inner lid body 321, and the inner lid body 321 is shaped and sized to match the air inlet 14. The inner space of the inner cap body 321 is partitioned by a partition wall 322 into a first chamber 323 and a second chamber 324, the first chamber 323 facing the air filtration membrane 34, and the second chamber 324 facing the self-sealing rubber pad 2. The partition wall 322 has a plurality of inner lid through holes 325 penetrating inside and outside, and each inner lid through hole 325 communicates with the first chamber 323 and the second chamber 324. The respective cap through holes 325 are uniformly circumferentially distributed around the second axis, i.e., the axis of each cap through hole 325 is disposed eccentrically with respect to the second axis. The inner surface of the partition wall 322 extends inwardly beyond a central post 326, the central post 326 extending inwardly beyond a bottom end surface 327 of the inner cap body. The air filtering membrane 34 is a generally meshed square or round sheet, which has the functions of filtering particles of a specific size and blocking bacteria, and the air filtering membrane 34 is installed inside the dust cap, so that when the air inlet passage 15 is used for air inlet, particles of corresponding grade in the atmosphere can be blocked, and cross contamination of the particles or bacteria in the atmosphere and the liquid medicine in the liquid medicine container can be prevented. The base 31 is a bottomed cylindrical body whose top is opened and whose bottom is closed by a cylindrical bottom 311, and the cylindrical bottom 311 is provided with a plurality of base through holes 312 uniformly distributed at equal angles to the circumference. Each outer cover through hole, inner cover through hole and base through hole are arranged in a one-to-one correspondence.
The self-sealing rubber gasket 2 has a cylindrical sealing portion 21 and an elastic film 22 capable of deforming when subjected to an external force, the sealing portion 21 is fixed inside the base 31, the sealing portion 21 is a structure penetrating inside and outside in the second axial direction, and the elastic film 22 closes an external opening of the sealing portion 21. The central portion 23 of the elastic membrane has a valve port 24 penetrating inside and outside in the second axial direction, and the central portion 23 can be connected to the outer edge of the cylindrical seal portion 21 by a crimp 25. The center post 326 of the dust cap has a sealing end surface 328, the sealing end surface 328 being sized larger than the valve port 24.
The valve port 24 of the elastic membrane is normally closed. When the contrast agent is absorbed, the elastic membrane is subjected to the forward pressure of the external atmosphere, and deforms, so that the valve port 24 of the elastic membrane leaves the center column 326, the valve port 24 is opened, the air inlet channel 15 is further communicated with the external atmosphere, and the external atmosphere can flow along the air flow direction shown by an arrow C, sequentially passes through the outer cover through hole 331, the inner cover through hole 325, the valve port 24 and the base through hole 312, and enters the air inlet channel 15. In normal closed condition, the degree of bending deformation of the gathers 25 is greater than that in liquid suction.
For the dust cap, the outer cover 33 and the inner cover 32 are fixed to the air inlet 14 with the bottom end face of the outer cover and the top end face of the inner cover disposed opposite to each other, and the air filtering membrane 34 is fixed between the bottom end face and the top end face. The base 31 is fixed in the air inlet 14, the inner cover 32 and the base 31 are in butt joint and fixed, and the self-sealing rubber cushion 2 is fixed between the inner cover 32 and the base 31. The second chamber 324 of the inner cover may function as a relief when the elastic membrane 22 is deformed.
For the self-sealing rubber pad, the thickness of the sealing portion 21 is greater than the thickness of the elastic film 22. The elastic film 22 has a central portion 23 and a fold 25 connecting the central portion 23 and the inner wall of the sealing portion 21, the thickness of the central portion 23 is larger than the thickness of the fold 25, the thickness of the central portion 23 is smaller than the thickness of the sealing portion 21, and the thickness of the sealing portion 21 may be twice or more the thickness of the fold 25. The corrugation 25 may be wavy in a longitudinal section of the self-sealing rubber mat 2 through the second axis, the corrugation 25 having high and low points. The low point P of the pleat 25 may be flush with the central interior surface 27. The outer surface of the central portion is provided with a recess 26, which recess 26 is capable of mating with the end of the central post 326.
In this embodiment, the low-starting-force self-sealing puncture outfit comprises a dust cap, a self-sealing rubber pad and a puncture outfit body which are integrated. The self-sealing rubber pad can be made of elastic materials in whole or in part, and is provided with a sealing part and an elastic membrane, wherein the rubber position of the elastic membrane is thin and can be repeatedly bent and deformed back and forth, and the rubber position is thin, so that the self-sealing rubber pad can be pushed by extremely small pressure to form sealing or open sealing, namely, a valve port is opened or closed. For the sealing part, the rubber position is thick and has good sealing effect, when the puncture outfit body needs to suck air, the valve port is opened by extremely low pressure due to the thin rubber position of the elastic membrane, so that the purpose of sucking air is achieved. The sealing part is normally closed in an assembling state and is in an interference state, and when pressure is reversely applied, the sealing part can form a self-sealing airtight. When the folds are deformed, the folds can move along the central part, so that the connecting channels are opened or closed.
In this embodiment, the dust cap includes an outer cap, an inner cap, and a base. The sealing part of the inner cover and the self-sealing rubber cushion is smooth and smooth, and plays a role in sealing. The base and the inner cover form an assembly, the base is tightly matched with the self-sealing rubber pad, and gas or liquid cannot enter when the pressure is reversed.
The foregoing description of the application has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the application pertains, based on the idea of the application.
Claims (8)
1. The utility model provides a low starting force self-sealing puncture outfit, includes puncture outfit body and the dustproof cap that has the second axis that has the first axis, puncture outfit body's tip is equipped with gas outlet and inlet, puncture outfit body's afterbody is equipped with the liquid outlet, puncture outfit body's lateral part is equipped with the air inlet, puncture outfit body still is equipped with along the first axis direction setting and by separated inlet channel and liquid medicine passageway, air inlet and gas outlet pass through inlet channel connects, liquid inlet and liquid outlet pass through liquid medicine passageway connects, dustproof cap installs in the air inlet, dustproof cap has the connecting channel that runs through along the second axis direction, connecting channel connects inlet channel and external atmosphere, its characterized in that still includes the self-sealing cushion that can control the connecting channel break-make, the self-sealing cushion has sealing part and the elastic membrane that can produce deformation when receiving pressure, sealing part is fixed in the connecting channel, the central part of elastic membrane has the valve port that runs through along the second axis direction in the connecting channel, be equipped with center post in the connecting channel, when the valve port is closed to the center post, the center post is hugged closely to the center post, and the center post is closed to the normal state is connected to the center post; when the contrast agent is sucked, under the action of the forward pressure of the external atmosphere, the elastic membrane deforms to enable the valve port to be separated from the central column, so that the connecting channel is conducted, and the air inlet channel is communicated with the external atmosphere; and the thickness of the sealing part is larger than that of the elastic film; the sealing part is a cylindrical body penetrating along the second axis direction, the inner opening of the sealing part is open, and the edge of the outer opening of the sealing part is connected with the central part through wavy folds; the central part is provided with a groove, and in a normal state, the end part of the central column is inserted into the groove.
2. The low actuation force self-sealing spike of claim 1 wherein the end face of the central post is a sealing end face that normally contacts the elastomeric membrane face.
3. The low actuation force self-sealing spike of claim 1 wherein the low point of the crimp is flush with the inner surface of the central portion.
4. The low actuation force self-sealing spike of claim 1 wherein the thickness of the pleat is less than the thickness of the central portion, the thickness of the central portion being less than the thickness of the sealing portion.
5. The low actuation force self-sealing puncture outfit of claim 1, wherein the thickness of the pleats is 0.1-0.15 mm.
6. The low actuation force self-sealing spike of claim 1 wherein the dust cap comprises an inner cap, an outer cap and an air filtering membrane, both the outer cap and the inner cap being secured to the air inlet, the air filtering membrane being secured between a bottom end surface of the outer cap and a top end surface of the inner cap.
7. The low actuation force self-sealing puncture outfit of claim 6, wherein said dust cap further comprises a base, said base is secured to said air inlet, said base is a bottomed cylinder, said self-sealing rubber pad is secured between said inner cap and base, and said connecting channel extends through said outer cap, inner cap and base.
8. The low actuation force self-sealing penetrator of claim 7, wherein the outer cap has a plurality of outer cap through holes about the second axis, the inner cap has a plurality of inner cap through holes about the second axis, and the base has a plurality of base through holes about the second axis, one corresponding to each of the outer cap through holes and one corresponding to each of the base through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111189264.2A CN113855561B (en) | 2021-10-12 | 2021-10-12 | Self-sealing puncture outfit with low starting force |
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| CN202111189264.2A CN113855561B (en) | 2021-10-12 | 2021-10-12 | Self-sealing puncture outfit with low starting force |
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| CN113855561A CN113855561A (en) | 2021-12-31 |
| CN113855561B true CN113855561B (en) | 2023-11-07 |
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| KR200335229Y1 (en) * | 2003-08-27 | 2003-12-03 | 경창산업주식회사 | Cap for Leakage-Prevention of Power Steering Oil Reservoir |
| CN102802696A (en) * | 2009-06-15 | 2012-11-28 | 伯尔拉工业有限公司 | Device for the controlled supply of a liquid to a medical flow line |
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| CN105120943A (en) * | 2013-03-16 | 2015-12-02 | 宝利麦迪柯尔有限公司 | Transfer device valve |
| CN208942312U (en) * | 2018-05-15 | 2019-06-07 | 深圳市迈威生物科技有限公司 | Puncture outfit and infusion set |
| CN209392395U (en) * | 2018-11-20 | 2019-09-17 | 山东威尔信医疗科技有限公司 | A kind of needle apparatus for filtering of making up a prescription |
| CN112717270A (en) * | 2020-12-31 | 2021-04-30 | 深圳市迈威生物科技有限公司 | Drip-proof closed joint for repeated use |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10173004B2 (en) * | 2013-01-08 | 2019-01-08 | Flowonix Medical Incorporated | Flow actuated valve for implantable drug delivery device |
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| KR200335229Y1 (en) * | 2003-08-27 | 2003-12-03 | 경창산업주식회사 | Cap for Leakage-Prevention of Power Steering Oil Reservoir |
| CN102802696A (en) * | 2009-06-15 | 2012-11-28 | 伯尔拉工业有限公司 | Device for the controlled supply of a liquid to a medical flow line |
| CN103596618A (en) * | 2011-06-08 | 2014-02-19 | 株式会社Jms | Male member |
| CN105120943A (en) * | 2013-03-16 | 2015-12-02 | 宝利麦迪柯尔有限公司 | Transfer device valve |
| CN208942312U (en) * | 2018-05-15 | 2019-06-07 | 深圳市迈威生物科技有限公司 | Puncture outfit and infusion set |
| CN209392395U (en) * | 2018-11-20 | 2019-09-17 | 山东威尔信医疗科技有限公司 | A kind of needle apparatus for filtering of making up a prescription |
| CN112717270A (en) * | 2020-12-31 | 2021-04-30 | 深圳市迈威生物科技有限公司 | Drip-proof closed joint for repeated use |
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| CN113855561A (en) | 2021-12-31 |
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