CN107126600B - Isolation protector and injection device with same - Google Patents
Isolation protector and injection device with same Download PDFInfo
- Publication number
- CN107126600B CN107126600B CN201710368143.1A CN201710368143A CN107126600B CN 107126600 B CN107126600 B CN 107126600B CN 201710368143 A CN201710368143 A CN 201710368143A CN 107126600 B CN107126600 B CN 107126600B
- Authority
- CN
- China
- Prior art keywords
- cavity
- liquid outlet
- liquid
- hole
- sub
- 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.)
- Expired - Fee Related
Links
- 238000002347 injection Methods 0.000 title claims abstract description 69
- 239000007924 injection Substances 0.000 title claims abstract description 69
- 238000002955 isolation Methods 0.000 title claims abstract description 50
- 230000001012 protector Effects 0.000 title claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 155
- 238000005192 partition Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 9
- 210000002445 nipple Anatomy 0.000 claims 2
- 208000015181 infectious disease Diseases 0.000 abstract description 8
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010255 intramuscular injection Methods 0.000 description 1
- 239000007927 intramuscular injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000013022 venting Methods 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
- A61M5/178—Syringes
- A61M5/31—Details
-
- 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
- A61M5/178—Syringes
Landscapes
- 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 an isolation protector and an injection device with the isolation protector, wherein the isolation protector comprises a closed container, a separator and a first one-way opening and closing piece, the closed container is provided with a cavity, a first end and a second end, the first end is provided with a receiving hole suitable for being inserted into a first liquid outlet on an injector, and the second end is provided with a second liquid outlet suitable for being inserted into an injection needle; the partition is arranged in the closed container and divides the cavity into a flow guide cavity and a buffer cavity, the flow guide cavity is communicated with the receiving hole and the second liquid outlet nozzle, and the partition is provided with a discharge hole for communicating the buffer cavity with the flow guide cavity; the first one-way opening and closing piece is arranged on the separating piece and closes the discharge hole, and is configured to open the discharge hole in one way along the direction from the diversion cavity to the buffer cavity when the pressure of liquid in the diversion cavity is greater than a first preset value. The invention can isolate the injector, does not pollute the injector and reduces the infection risk caused by the injector. In addition, a sense of discomfort due to pushing too fast can be prevented.
Description
Technical Field
The invention relates to a medical apparatus, in particular to an isolation protector and an injection device with the same.
Background
A syringe is a common medical device, and is composed of a syringe barrel with a small hole at the front end and a matched plunger rod, and is used for injecting liquid into an area which cannot be accessed by other methods or extracting liquid from the area, wherein the liquid or gas is sucked from the small hole at the front end of the syringe barrel when the plunger rod is extracted, and the liquid or gas is extruded when the plunger rod is pushed in.
However, when the syringe is used to inject liquid into a human body, especially for intramuscular injection, the liquid in the syringe is gradually injected into the human body as the plunger rod is pushed in, and when the liquid injection is completed after the plunger rod is pushed to the extreme position, the liquid pressure is higher due to the accumulation of the liquid at the injection position on the body surface, so that there may be some reverse backflow of the liquid at the position, and the liquid may enter the front end of the syringe through the needle, thus causing the front end of the syringe to be contaminated. In addition, depending on the experience of the doctor or nurse pushing the plunger rod, discomfort or distending pain to the patient due to the too high injection speed is inevitable.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the invention is to propose an isolation protector.
Another object of the invention is to propose an injection device having the above mentioned isolation protector.
To achieve the above objects, in one aspect, an isolation protector according to an embodiment of the present invention, adapted to be connected between a syringe and a needle, includes:
the injection device comprises a closed container, a first injection device and a second injection device, wherein the closed container is provided with a cavity, a first end and a second end, the first end is provided with a receiving hole suitable for being connected with a first liquid outlet on the injector in an inserted mode, and the second end is provided with a second liquid outlet suitable for being connected with the injection needle in an inserted mode;
the separator is arranged in the closed container and divides the cavity into a flow guide cavity and a buffer cavity, the flow guide cavity is communicated with the receiving hole and the second liquid outlet nozzle, and the separator is provided with a discharge hole for communicating the buffer cavity with the flow guide cavity;
the first one-way opening and closing piece is arranged on the partition and closes the discharge hole, and is configured to open the discharge hole in one way along the direction from the diversion cavity to the buffer cavity when the pressure of liquid in the diversion cavity is greater than a first preset value.
According to the isolation protector provided by the embodiment of the invention, the isolation protector can be connected between the injector and the injection needle, so that when the liquid backflow problem exists, the backflow liquid enters the isolation protector and cannot enter the injector, the injector cannot be polluted, and the infection risk caused by the injector is reduced. In addition, when pushing and shoving speed when too fast, the water conservancy diversion intracavity liquid pressure increase among the isolation protector, when increasing to first predetermined value, first one-way opening and closing piece can be opened, and at this moment, the liquid in the water conservancy diversion intracavity can enter into to the cushion chamber through the bleeder hole, and from this, can reduce the liquid flow who flows in from the second liquid outlet nozzle, and then play the guard action, prevent to a certain extent because push and shove too fast the flow that causes and the uncomfortable sense that arouses.
In addition, the isolation protector according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, further comprising:
the second one-way opening and closing piece is arranged at the closed end, closes the liquid outlet hole and is configured to open the liquid outlet hole in one way along the direction from the liquid outlet hole to the diversion cavity when the pressure of liquid in the first liquid outlet nozzle is greater than a second preset value.
According to an embodiment of the invention, the second predetermined value is smaller than the first predetermined value.
According to an embodiment of the present invention, further comprising:
the piston assembly comprises a piston and a spring, the piston is slidably arranged in the buffer cavity and separates the buffer cavity into a first sub-cavity and a second sub-cavity, the spring is arranged in the first sub-cavity and provides driving force for the piston, and the second sub-cavity is communicated with the discharge hole; the separator is provided with a backflow hole which communicates the second sub-cavity with the flow guide cavity;
a third one-way shutter disposed to the divider and closing the backflow hole, and configured to open the backflow hole one-way in a direction from the second sub-cavity to the diversion cavity when a pressure of the liquid in the second sub-cavity is greater than a third predetermined value.
According to one embodiment of the invention, the closed container is formed in a hollow cylindrical shape, the partition is formed as a cylinder which is open at both ends and is arranged coaxially with the closed container, one end of the cylinder is communicated with one end of the receiving hole far away from the injector, and the other end of the cylinder is communicated with the second liquid outlet nozzle.
According to one embodiment of the invention, the piston is sleeved outside the cylinder body and is tightly attached to the outer wall of the cylinder body.
According to one embodiment of the invention, the closed container comprises a cup body and a sealing cover, wherein one end of the cup body is provided with the second liquid outlet nozzle, and the other end of the cup body is an opening end; the seal cap is in threaded connection with the open end, and the seal cap is provided with the receiving hole.
According to an embodiment of the invention, the one end of the cup body is provided with a threaded interface protruding inwards, the other end of the cylinder body is in threaded connection with the threaded interface, and the one end of the cylinder body is tightly attached to the sealing cover.
According to one embodiment of the invention, each of the first, second and third unidirectional shutters is a one-way valve plate.
In another aspect, an injection device is provided according to an embodiment of the present invention, including:
the syringe comprises a syringe barrel and a plunger rod, the syringe barrel is provided with a flow channel, a near end and a far end, the far end is provided with a first liquid outlet nozzle communicated with the flow channel, and the plunger rod can be slidably arranged in the syringe barrel;
as mentioned above, the receiving hole of the isolation current limiter is inserted into the first liquid outlet nozzle;
and the injection needle is inserted and connected with the second liquid outlet nozzle of the isolation current limiter.
According to the injection device provided by the embodiment of the invention, the isolation protector is arranged, so that the syringe cannot be polluted during injection, and the infection risk caused by the syringe is reduced. In addition, the device can play a role in protection, and can prevent the discomfort caused by the overlarge flow due to the too fast pushing to a certain extent.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a perspective view of an isolation protector according to an embodiment of the present invention;
FIG. 2 is an exploded view of an isolation protector according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an isolation protector according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of an embodiment of the isolation protector of the present invention with the first one-way shutter and the second one-way shutter open;
FIG. 5 is a cross-sectional view of the isolation protector of the embodiment of the present invention with the third one-way closure open;
FIG. 6 is a perspective view of an injection device according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of an injection device according to an embodiment of the present invention;
fig. 8 is an exploded view of an injection device according to an embodiment of the present invention.
Reference numerals:
an isolation protector 100;
closing the container 10;
a cup body 101;
a second liquid outlet 1011;
a sealing cover 102;
receiving holes 1021;
a separator 20;
a bleed aperture 201;
a return orifice 202;
a diversion cavity P01;
a buffer chamber P02;
a first sub-cavity P021;
a second sub-cavity P022;
a first one-way shutter 30;
a second one-way shutter 40;
a piston assembly 50;
a piston 501;
a spring 502;
a third one-way shutter 60;
an injector 200;
a syringe 210;
a first liquid outlet nozzle 2101;
a plunger rod 220;
an injection needle 300.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The isolation protector 100 of the present embodiment is described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 5, an isolation protector 100 according to an embodiment of the present invention is adapted to be connected between a syringe 200 and a needle 300, and includes a closed container 10, a separating member 20, and a first one-way opening and closing member 30.
Specifically, the closed container 10 has a cavity, a first end and a second end, the first end is provided with a receiving hole 1021 adapted to be inserted into the first liquid outlet 2101 of the syringe 200, and the second end is provided with a second liquid outlet 1011 adapted to be inserted into the injection needle 300. That is, after the receiving hole 1021 at the first end of the closed container 10 is inserted into the first liquid outlet 2101 of the syringe 200, the isolation protector 100 can be assembled onto the syringe 200, and after the second liquid outlet 1011 at the second end of the closed container 10 is inserted into the syringe 300, the syringe 300 can be assembled onto the isolation protector 100. It should be noted that the closed container 10 is connected to the syringe 200 and the injection needle 300 in a plugging manner, so as to facilitate assembly and disassembly.
The partition member 20 is disposed in the closed container 10, and divides the cavity into a flow guide cavity P01 and a buffer cavity P02, the flow guide cavity P01 is communicated with the receiving hole 1021 and the second liquid outlet 1011, and the partition member 20 is provided with a discharge hole 201 for communicating the buffer cavity P02 with the flow guide cavity P01.
That is, the partition 20 in the chamber of the closed container 10 is divided into a diversion cavity P01 and a buffer cavity P02, when the receiving hole 1021 at the first end of the closed container 10 is inserted into the first liquid outlet 2101 of the syringe 200, the closed container 10 can be communicated with the diversion cavity P01 in the closed container 10, the liquid in the syringe 200 can flow into the diversion cavity P01 of the closed container 10 through the first liquid outlet 2101, then flow from the diversion cavity P01 to the second liquid outlet 1011 of the closed container 10, and finally flow into the injection needle 300 through the second liquid outlet 1011. Meanwhile, since the partition 20 is provided with the bleed hole 201, when the bleed hole 201 is in an open state, the liquid in the diversion cavity P01 can also enter the buffer cavity P02 through the bleed hole 201.
The first one-way shutter 30 is disposed on the partition 20 and closes the bleed hole 201, and is configured to open the bleed hole 201 in one way in a direction from the diversion cavity P01 to the buffer cavity P02 when the liquid pressure in the diversion cavity P01 is greater than a first predetermined value.
That is to say, the first one-way opening and closing member 30 is used for controlling the opening and closing of the drainage hole 201 on the partition member 20, specifically, when the liquid is injected by the syringe 200, the liquid flows into the diversion cavity P01 through the first liquid outlet 2101, when the liquid pressure in the diversion cavity P01 is greater than the first predetermined value, the first one-way opening and closing member 30 is opened, at this time, the drainage hole 201 is opened, the liquid in the diversion cavity P01 can enter the buffer cavity P02, and when the liquid pressure in the diversion cavity P01 is less than the first predetermined value, the first one-way opening and closing member 30 is closed, at this time, the liquid in the diversion cavity P01 cannot enter the buffer cavity P02.
It should be noted that the first predetermined value is the minimum value of the liquid pressure required to open the first one-way shutter 30, therefore, the first one-way shutter 30 can be set according to the normal injection speed that the human body can endure, and the first one-way shutter 30 is further made to open under the appropriate pressure.
Referring to fig. 6-8 and 3-5, the following briefly describes the use of the isolation protector 100 of the present invention in conjunction with a syringe 200 and needle 300.
First, the receiving hole 1021 of the isolation protector 100 is inserted into the first outlet nozzle 2101 of the syringe 200, and the injection needle 300 is inserted into the second outlet of the isolation protector 100. And inserting the injection needle 300 to the injection position of the human body.
Then, the plunger rod 220 of the syringe 200 is slightly pushed, so that the liquid in the syringe 200 flows into the diversion cavity P01 of the isolation protector 100 from the first liquid outlet 2101, then flows into the injection needle 300 through the diversion cavity P01, and finally is injected into the human body from the injection needle 300.
When the pushing speed is too fast, the liquid flowing into the diversion cavity P01 increases, and the diameter of the injection needle 300 is relatively small, so that the pressure of the liquid in the diversion cavity P01 increases, and when the liquid in the diversion cavity P01 increases, the flow velocity of the liquid in the injection needle 300 also increases, thereby causing discomfort to the human body. In this case, if the liquid pressure in the guiding cavity P01 is greater than the first predetermined value, the first one-way shutter 30 on the partition 20 is opened, and at this time, the bleed hole 201 on the partition 20 is opened (as shown in fig. 4), and a part of the liquid in the guiding cavity P01 enters the buffer cavity P02 through the bleed hole 201, so that the flow rate flowing into the injection needle 300 can be reduced;
finally, when the liquid injection is completed, the injection needle 300 is pulled out from the human body. It should be noted that when the injection is completed and the injection needle 300 is not yet pulled out, a part of the liquid may flow back into the injection needle 300 or even into the diversion cavity P01 of the isolation protector 100 through the injection needle 300 because the local pressure may be large due to the accumulation of liquid at the injection position in the human body.
According to the isolation protector 100 provided by the embodiment of the invention, the isolation protector 100 can be connected between the syringe 200 and the injection needle 300, so that when a liquid backflow problem exists, the backflow liquid enters the isolation protector 100 and does not enter the syringe 200, therefore, the syringe 200 is not polluted, and the infection risk caused by the syringe 200 is reduced. In addition, when pushing speed is too fast, liquid pressure in the diversion cavity P01 in the isolation protector 100 increases, when increasing to a first preset value, the first one-way opening and closing piece 30 can be opened, at this moment, liquid in the diversion cavity P01 can enter the buffer cavity P02 through the leakage hole 201, and therefore the liquid flow flowing in from the second liquid outlet nozzle 1011 can be reduced, and then a protection effect is achieved, and discomfort caused by too large flow due to too fast pushing is prevented to a certain extent.
The syringe 200 may be a disposable plastic syringe 200 or a reusable metal or glass syringe 200. If the syringe 200 is a disposable syringe 200, if the syringe 200 is contaminated, cross-infection is easily caused after the syringe 200 is discarded or in the processes of transferring and recycling waste products; if the syringe 200 is reusable, infection may be caused to subsequent patients in subsequent use if the sterilization is not thorough, and therefore, the isolation protector 100 provided by the embodiment of the present invention can completely isolate the syringe 200 from the injection needle 300, prevent backflow liquid from entering the syringe 200, and reduce the risk of infection caused by the syringe 200.
Referring to fig. 2 to 4, in some embodiments of the present invention, a second one-way opening and closing member 40 is further included, an end of the receiving hole 1021 remote from the syringe 200 is a closed end, the closed end is provided with a liquid outlet hole 1022, the second one-way opening and closing member 40 is disposed at the closed end and closes the liquid outlet hole 1022, and is configured to unidirectionally open the liquid outlet hole 1022 in a direction from the liquid outlet hole 1022 to the diversion cavity P01 when the pressure of the liquid in the first liquid nozzle 2101 is greater than a second predetermined value.
That is, the second one-way opening and closing member 40 is used to control the opening and closing of the liquid outlet holes 1022, specifically, when the pressure of the liquid in the first liquid outlet nozzle 2101 on the syringe 200 is greater than the second predetermined value, the second one-way opening and closing member 40 is opened, at this time, the liquid outlet holes 1022 are opened (as shown in fig. 4), the liquid in the first liquid outlet nozzle 2101 can enter the diversion cavity P01, and when the pressure of the liquid in the first liquid outlet nozzle 2101 is less than the second predetermined value, the second one-way opening and closing member 40 is closed, at this time, the liquid in the first liquid outlet nozzle 2101 cannot enter the diversion cavity P01. Thus, when the injector 200 is used to inject liquid, the pressure in the first liquid outlet nozzle 2101 gradually increases, and finally, when the pressure is greater than the second predetermined value, the second one-way opening and closing member 40 may be opened, so that the liquid may flow into the diversion cavity P01 from the first liquid outlet nozzle 2101.
Meanwhile, since the second one-way opening and closing member 40 is in one-way conduction along the direction from the liquid outlet 1022 to the flow guide cavity P01, but cannot be in conduction from the flow guide cavity P01 to the liquid outlet 1022, if a part of the liquid reversely flows into the injection needle 300 and flows into the flow guide cavity P01 of the isolation protector 100 through the injection needle 300 when the injection of the injection needle 300 is completed, the second one-way opening and closing member 40 cannot be in conduction from the flow guide cavity P01 to the liquid outlet 1022, so that the part of the liquid cannot flow into the first liquid outlet 2101 of the injector 200, so that the separation of the backflow liquid can be realized, the contamination of the injector 200 by the backflow liquid can be avoided, the infection risk caused by the injector 200 can be reduced, and the safety of the injector can be further improved.
Optionally, the second predetermined value is less than the first predetermined value. That is, the liquid pressure required for opening the second one-way shutter 40 is less than the liquid pressure required for opening the first one-way shutter 30, so that the second one-way shutter 40 is easily opened during the injection process, and the liquid in the syringe 200 can flow into the diversion cavity P01 more smoothly. Meanwhile, the first one-way opening and closing valve cannot be opened easily, and only the liquid pressure value in the diversion cavity P01 is relatively high (namely, greater than a second preset value), so that part of liquid in the diversion cavity P01 is shunted to the buffer cavity P02, and therefore the liquid injection valve is better in using effect, can smoothly inject liquid, and can ensure shunting when the pressure is too high.
Referring to fig. 2 to 4, in some embodiments of the present invention, the present invention further includes a piston assembly 50 and a third one-way opening and closing member 60, wherein the piston assembly 50 includes a piston 501 and a spring 502, the piston 501 is slidably installed in the buffer chamber P02 and separates the buffer chamber P02 into a first sub-chamber P021 and a second sub-chamber P022, the spring 502 is disposed in the first sub-chamber P021 and provides a pushing force for the piston 501, and the second sub-chamber P022 is communicated with the vent hole 201; the separator 20 is provided with a backflow hole 202 for communicating the second sub-cavity P022 with the diversion cavity P01.
A third one-way shutter 60 is provided to the partition 20 and closes the backflow hole 202, and is configured to unidirectionally open the backflow hole 202 in a direction from the second sub-chamber P022 to the baffle chamber P01 when a pressure of liquid in the second sub-chamber P022 is greater than a third predetermined value.
That is, the piston assembly 50 is disposed in the buffer chamber P02 inside the closed container 10, wherein the piston 501 is slidably engaged with the buffer chamber P02, can slide back and forth in the buffer chamber P02, and can make the first sub-chamber P021 and the second sub-chamber P022 generate opposite volume changes when the piston 501 slides, and the second sub-chamber P022 is communicated with the leakage hole 201, that is, part of the liquid in the diversion chamber P01 can flow into the second sub-chamber P022 through the leakage hole 201 when the first one-way shutter 30 is opened.
And the spring 502 is disposed in the first sub-cavity P021 and can provide a pushing force for the piston 501, for example, in the example of fig. 3, one end of the spring 502 abuts against the second end of the closed container 10, the other end of the spring 502 abuts against the piston 501, when the piston 501 slides towards the second end of the closed container 10, the first sub-cavity P021 is compressed and the volume is reduced, and the second sub-cavity P022 is released and the volume is increased, when the piston 501 slides towards the first end of the closed container 10, the second sub-cavity P022 is compressed and the volume is reduced, and the first sub-cavity P021 is released and the volume is increased.
The third one-way opening and closing member 60 is used for controlling the opening and closing of the backflow hole 202 of the separating member 20, specifically, when the pressure of the liquid in the second sub-chamber P022 is greater than a third predetermined value, the third one-way opening and closing member 60 is opened, at this time, the backflow hole 202 is opened, the liquid in the second sub-chamber P022 flows back to the diversion chamber P01, and then is injected into the human body from the diversion chamber P01 through the injection needle 300. When the pressure of the liquid in the second sub-chamber P022 is less than the third predetermined value, the third one-way shutter 60 is closed, and at this time, the liquid in the second sub-chamber P022 cannot flow back to the diversion chamber P01.
When the injector 200 is used for injection, after the liquid in the first liquid outlet 2101 of the injector 200 passes through the second unidirectional opening and closing member 40, the liquid flows into the diversion cavity P01, when the pressure of the liquid in the diversion cavity P01 is relatively high (greater than a first predetermined value), at this time, the first unidirectional opening and closing member 30 is opened (as shown in fig. 4), a part of the liquid enters the second sub-cavity P022 through the bleed hole 201, and as the pressure of the liquid in the second sub-cavity P022 gradually increases, the liquid inside the first sub-cavity P021 pushes the piston 501 to slide towards the second end of the closed container 10, at this time, the volume of the first sub-cavity P021 gradually decreases, the spring 502 inside the first sub-cavity P021 is gradually compressed, the pushing force of the spring 502 on the piston 501 gradually increases, the volume of the second sub-cavity P022 gradually increases, and the accumulated liquid gradually increases. When the liquid pressure in the diversion cavity P01 is reduced (for example, the injector 200 approaches or has completed injection) to be smaller than the pushing force of the spring 502, at this time, the spring 502 is released to push the piston 501 to slide towards the first end of the closed container 10, at this time, the second sub-cavity P022 is compressed, the volume is gradually reduced, the internal liquid pressure is gradually increased, when the internal liquid pressure is greater than the third predetermined value, the third one-way opening and closing member 60 is opened, the backflow hole 202 is opened (as shown in fig. 5), the liquid in the second sub-cavity P022 can flow back into the diversion cavity P01 through the backflow hole 202, and then is injected into the human body from the diversion cavity P01 through the injection needle 300, so that partial liquid entering the second sub-cavity P022 can be re-injected into the human body, and the waste of the medicine and the metering error are reduced.
It should be noted that, since the first one-way shutter 30 is in one-way communication along the direction from the diversion cavity P01 to the second sub-cavity P022, and the third one-way shutter 60 is in one-way communication along the direction from the second sub-cavity P022 to the diversion cavity P01, when the first one-way shutter 30 is opened, the third one-way shutter 60 is closed, and when the third one-way shutter 60 is opened, the first one-way shutter 30 is closed, that is, when the vent hole 201 is opened, the return hole 202 is closed, and when the return hole 202 is opened, the vent hole 201 is closed, so that the vent hole 201 and the return hole 202 can be ensured to be always kept in different states, and the liquid diversion venting and the liquid return are ensured to be independent of each other.
Advantageously, in one embodiment of the present invention, the closed container 10 is formed in a hollow cylindrical shape, the partition 20 is formed in a cylindrical body which is open at both ends and is coaxially disposed with the closed container 10, one end of the cylindrical body is communicated with one end of the receiving hole 1021 far away from the syringe 200, and the other end of the cylindrical body is communicated with the second liquid outlet 1011.
That is to say, the cylindrical space inside the cylinder is partially defined as the diversion cavity P01, and the annular space between the outside of the cylinder and the closed container 10 is partially defined as the buffer cavity P02, so that the structure is simpler and more compact, the buffer cavity P02 and the diversion cavity P01 are reasonably arranged, and the communication between the syringe 200 and the injection needle 300 is conveniently realized.
Correspondingly, the piston 501 is sleeved outside the barrel and tightly attached to the outer wall of the barrel, namely, a through hole is formed in the center of the piston 501, the through hole penetrates through the barrel to be connected with the piston 501 and the barrel, meanwhile, the hole wall of the through hole is tightly attached to the outer wall of the barrel, sealing can be achieved, and liquid leakage is reduced. When the spring 502 provides an urging force to push the piston 501 to slide toward the first end of the closed container 10, the piston 501 can smoothly extrude the liquid in the second sub-chamber P022 to the diversion chamber P01 through the backflow hole 202.
Referring to fig. 2 to 4, in an embodiment of the present invention, closed container 10 includes a cup body 101 and a sealing cover 102, one end of cup body 101 is provided with the second liquid outlet 1011, and the other end of cup body 101 is an open end; the seal cap 102 is threadedly coupled to the open end, and the seal cap 102 is provided with the receiving hole 1021.
During assembly, the partition can be installed in the cup body 101, the spring 502 and the piston 501 are installed in the cup body 101, and finally the sealing cover 102 and the cup body 101 are connected and sealed.
Illustratively, the one end of the cup body 101 is provided with a threaded interface protruding inwards, the other end of the cylinder body is in threaded connection with the threaded interface, and the one end of the cylinder body is tightly attached to the sealing cover 102. That is to say, between barrel and the cup 101 to being connected through threaded connection, so, on the one hand, can be so that the assembly is simple and convenient more, on the other hand, can ensure that but flow guide cavity P01 can communicate with second liquid outlet 1011 after connecting.
Optionally, each of the first unidirectional opening and closing member 30, the second unidirectional opening and closing member 40, and the third unidirectional opening and closing member 60 is a unidirectional valve plate, and a unidirectional valve plate is adopted, so that the structure is simple, the thickness is thin, the installation is convenient, and the requirement of unidirectional conduction can be met.
Referring to fig. 6 to 8, an injection device according to an embodiment of the present invention includes a syringe 200, an isolation restrictor according to the above embodiment, and an injection needle 300.
The syringe 200 comprises a barrel 210 and a plunger rod 220, wherein the barrel 210 has a fluid passage, a proximal end and a distal end, the distal end has a first liquid outlet 2101 communicated with the fluid passage, and the plunger rod 220 can be slidably mounted in the barrel 210.
The receiving hole 1021 of the isolation current limiter is inserted into the first liquid outlet nozzle 2101.
The injection needle 300 is inserted into the second outlet 1011 of the isolated current limiter.
According to the injection device provided by the embodiment of the invention, the isolation protector 100 is arranged, so that the syringe 200 is not polluted during injection, and the infection risk caused by the syringe 200 is reduced. In addition, the device can play a role in protection, and can prevent the discomfort caused by overlarge flow due to too fast pushing to a certain extent.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. An isolation protector adapted to be connected between a syringe and a needle, comprising:
the injection device comprises a closed container, a first injection device and a second injection device, wherein the closed container is provided with a cavity, a first end and a second end, the first end is provided with a receiving hole suitable for being connected with a first liquid outlet on the injector in an inserted mode, and the second end is provided with a second liquid outlet suitable for being connected with the injection needle in an inserted mode;
the separator is arranged in the closed container and divides the cavity into a flow guide cavity and a buffer cavity, the flow guide cavity is communicated with the receiving hole and the second liquid outlet nozzle, and the separator is provided with a discharge hole for communicating the buffer cavity with the flow guide cavity;
the first one-way opening and closing piece is arranged on the partition and closes the discharge hole, and is configured to open the discharge hole in one way along the direction from the diversion cavity to the buffer cavity when the pressure of liquid in the diversion cavity is greater than a first preset value;
the second one-way opening and closing piece is arranged at the closed end, closes the liquid outlet hole and is configured to open the liquid outlet hole in one way along the direction from the liquid outlet hole to the diversion cavity when the pressure of liquid in the first liquid outlet nozzle is greater than a second preset value; the second predetermined value is less than the first predetermined value;
the piston assembly comprises a piston and a spring, the piston is slidably arranged in the buffer cavity and separates the buffer cavity into a first sub-cavity and a second sub-cavity, the spring is arranged in the first sub-cavity and provides a driving force for the piston, and the second sub-cavity is communicated with the discharge hole; the separator is provided with a backflow hole for communicating the second sub-cavity with the flow guide cavity;
a third one-way shutter disposed to the divider and closing the backflow hole, and configured to open the backflow hole one-way in a direction from the second sub-cavity to the diversion cavity when a pressure of the liquid in the second sub-cavity is greater than a third predetermined value.
2. The isolation protector of claim 1, wherein the closed container is formed in a hollow cylindrical shape, the partition is formed in a cylindrical body having both ends opened and disposed coaxially with the closed container, one end of the cylindrical body communicates with an end of the receiving hole remote from the syringe, and the other end of the cylindrical body communicates with the second liquid outlet nozzle.
3. The isolation protector of claim 2, wherein the piston is sleeved outside the cylinder and is in close fit with the outer wall of the cylinder.
4. The isolation protector of claim 2, wherein the closed container comprises a cup body and a sealing cover, the second liquid outlet is arranged at one end of the cup body, and the other end of the cup body is an open end; the seal cap is in threaded connection with the open end, and the seal cap is provided with the receiving hole.
5. The isolation protector of claim 4, wherein the one end of the cup body is provided with an inwardly protruding nipple, the other end of the barrel body is threadedly connected to the nipple, and the one end of the barrel body is closely attached to the sealing cover.
6. The isolation protector of claim 1, wherein each of the first, second, and third one-way shutters is a one-way valve flap.
7. An injection device, comprising:
the injection device comprises an injection tube and a plunger rod, wherein the injection tube is provided with a flow channel, a near end and a far end, the far end is provided with a first liquid outlet nozzle communicated with the flow channel, and the plunger rod can be slidably arranged in the injection tube;
the isolation protector of any one of claims 1 to 6, wherein a receiving hole of the isolation protector is inserted into the first liquid outlet nozzle;
and the injection needle is inserted and connected with the second liquid outlet nozzle of the isolation protector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368143.1A CN107126600B (en) | 2017-05-23 | 2017-05-23 | Isolation protector and injection device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368143.1A CN107126600B (en) | 2017-05-23 | 2017-05-23 | Isolation protector and injection device with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107126600A CN107126600A (en) | 2017-09-05 |
| CN107126600B true CN107126600B (en) | 2023-01-03 |
Family
ID=59732663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710368143.1A Expired - Fee Related CN107126600B (en) | 2017-05-23 | 2017-05-23 | Isolation protector and injection device with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107126600B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621832B (en) * | 2017-09-11 | 2020-07-31 | 东南大学 | Syringe flow stabilizing device |
| CN108853649B (en) * | 2018-05-10 | 2021-03-12 | 青岛大学附属医院 | Medical nursing syringe |
| CN111685867B (en) * | 2020-06-22 | 2020-12-01 | 镇江恒生涓恩医疗器械有限公司 | Multistage stable form ablation electrode |
| CN114247010B (en) * | 2021-12-27 | 2023-08-18 | 江苏大学附属医院 | Medical feedback type columnar piezoelectric automatic microinjector |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW445156B (en) * | 1998-10-26 | 2001-07-11 | Pharmacia & Amp Upjohn Ab | Autoinjector |
| CN101132820A (en) * | 2005-01-24 | 2008-02-27 | 安塔雷斯制药公司 | Prefilled needle assisted jet injector |
| CN101312759A (en) * | 2004-12-24 | 2008-11-26 | 伊恩·马歇尔·穆尔 | Safety syringe |
| CN102458518A (en) * | 2009-06-02 | 2012-05-16 | 赛诺菲-安万特德国有限公司 | Medicated module with integral flow distribution system |
| US20130006194A1 (en) * | 2006-06-22 | 2013-01-03 | William Anderson | Antiseptic Cap Equipped Syringe |
| US20140052074A1 (en) * | 2012-08-20 | 2014-02-20 | Becton, Dickinson And Company | Medical Devices For Blood Reflux Prevention And Methods Of Use |
| CN106237453A (en) * | 2016-09-07 | 2016-12-21 | 金崇熙 | A kind of syringe filter and syringe |
-
2017
- 2017-05-23 CN CN201710368143.1A patent/CN107126600B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW445156B (en) * | 1998-10-26 | 2001-07-11 | Pharmacia & Amp Upjohn Ab | Autoinjector |
| CN101312759A (en) * | 2004-12-24 | 2008-11-26 | 伊恩·马歇尔·穆尔 | Safety syringe |
| CN101132820A (en) * | 2005-01-24 | 2008-02-27 | 安塔雷斯制药公司 | Prefilled needle assisted jet injector |
| US20130006194A1 (en) * | 2006-06-22 | 2013-01-03 | William Anderson | Antiseptic Cap Equipped Syringe |
| CN102458518A (en) * | 2009-06-02 | 2012-05-16 | 赛诺菲-安万特德国有限公司 | Medicated module with integral flow distribution system |
| US20140052074A1 (en) * | 2012-08-20 | 2014-02-20 | Becton, Dickinson And Company | Medical Devices For Blood Reflux Prevention And Methods Of Use |
| CN106237453A (en) * | 2016-09-07 | 2016-12-21 | 金崇熙 | A kind of syringe filter and syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107126600A (en) | 2017-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107126600B (en) | Isolation protector and injection device with same | |
| US11724038B2 (en) | Syringe assembly with inverse delivery | |
| US20200376201A1 (en) | Medicant Injection Device | |
| US4772273A (en) | Variable-volume vented container | |
| US4729764A (en) | Irrigator and tissue separator | |
| US9333288B2 (en) | Attachable plunger rod and associated packaging | |
| JP6396898B2 (en) | Clip syringe | |
| DK162480B (en) | hypodermic syringe | |
| BR112015003566B1 (en) | wash syringe set | |
| JP2015521529A (en) | Single use delivery device with primer element | |
| US4952210A (en) | Parenteral fluid administration set | |
| US4998926A (en) | Parenteral fluid administration set | |
| HUT76899A (en) | Low drag syringe and cartridge | |
| EP2218476B2 (en) | Leaf spring valve and cone membrane valve | |
| RU2739895C2 (en) | Cartridge drip dispenser | |
| US20200405954A1 (en) | Status Indicator of a Drug Delivery System | |
| EP2620124B1 (en) | Injection syringe | |
| US6083204A (en) | Method and apparatus for gravity-fed intravenous infusion | |
| CN113164679A (en) | Syringe adapter | |
| CN208130224U (en) | Isolation protector and injection device with the Isolation protector | |
| ES2979009T3 (en) | Refilling system for medical devices using the jet delivery principle | |
| US10450124B2 (en) | Telescoping syringe with one-way valve | |
| CN215351500U (en) | Push-injection type enema administration device | |
| WO2017076845A1 (en) | Tube set for administering a medical fluid to a patient | |
| JPH11262525A (en) | Medicine self-injecting set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20230103 |