CN114632218B - Pneumatic driving injection device - Google Patents
Pneumatic driving injection device Download PDFInfo
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- CN114632218B CN114632218B CN202210248209.4A CN202210248209A CN114632218B CN 114632218 B CN114632218 B CN 114632218B CN 202210248209 A CN202210248209 A CN 202210248209A CN 114632218 B CN114632218 B CN 114632218B
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- pressure
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- 238000002347 injection Methods 0.000 title claims abstract description 156
- 239000007924 injection Substances 0.000 title claims abstract description 156
- 239000003814 drug Substances 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims description 80
- 239000011521 glass Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229940079593 drug Drugs 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 7
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 102000004877 Insulin Human genes 0.000 description 3
- 108090001061 Insulin Proteins 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 229940125396 insulin Drugs 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M5/14526—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons the piston being actuated by fluid pressure
-
- 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
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M5/1456—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
-
- 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
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/14586—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of a flexible diaphragm
- A61M5/14593—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of a flexible diaphragm the diaphragm being actuated by fluid pressure
Abstract
The invention discloses a pneumatic driving injection device, comprising: the injection cavity is provided with a medicine adding port and a medicine outlet, and the first injection part and the second injection part are communicated with the medicine outlet through one-way valves. By using the pneumatic driving injection device provided by the invention, the injection speed and the injection precision of the injector can be improved.
Description
Technical Field
The invention relates to the technical field of syringes, in particular to a pneumatic driving injection device.
Background
In the prior art, medical staff usually perform continuous insulin injection operation on a patient by using a mechanical insulin pump, wherein the mechanical insulin pump needs to continuously inject a medicine for a long time, and the process may cause unstable piston thrust of an injector, so that the problem of unstable injection quantity of the injector is caused, and finally, the treatment effect of the patient is poor.
In view of the above, how to improve the injection speed and accuracy of the injector is a problem to be solved by those skilled in the art.
Disclosure of Invention
Accordingly, the present invention is directed to a pneumatically driven injection device that can improve the injection speed and accuracy of the injector.
In order to achieve the above object, the present invention provides the following technical solutions:
a pneumatically driven injection device, comprising: the medical liquid injection device comprises a pressure cavity for containing compressed gas, an injection cavity for containing medical liquid, a film for separating the pressure cavity from the injection cavity, a first injection part for continuously injecting the medical liquid to a human body, a second injection part for quantitatively injecting the medical liquid to the first injection part, a communicating pipe for communicating the first injection part and the second injection part and a control part for controlling the liquid injection process of the second injection part, wherein the injection cavity is provided with a medicine adding port and a medicine outlet, and the first injection part and the second injection part are communicated with the medicine outlet through one-way valves.
Preferably, the first injection part comprises a capillary glass tube communicated with the one-way valve and an indwelling needle communicated with the capillary glass tube.
Preferably, the second injection part comprises an outer cylinder, an inner cylinder capable of moving up and down relative to the inner wall of the outer cylinder and a connecting part, wherein the inner cylinder is used for containing the liquid medicine for quantitative injection, and the bottom of the outer cylinder is connected with the top of the connecting part;
the control piece comprises a piston capable of moving up and down along the inner wall of the inner cylinder, a push rod used for pushing the piston to move and a sliding valve capable of moving up and down along the inner wall of the connecting part, the inner cylinder is communicated with the sliding valve, the upper part of the connecting part is provided with a liquid inlet communicated with the one-way valve, the lower part of the connecting part is provided with a liquid outlet communicated with the communicating pipe, and the sliding valve is provided with a circulating port used for being selectively communicated with the liquid inlet or the liquid outlet.
Preferably, the control member further includes a reset member for automatically resetting the push rod.
Preferably, the reset member includes a first spring and a second spring, the first spring is wound between the outer peripheral portion of the push rod and the top of the piston, the second spring is wound between the outer peripheral portion of the inner cylinder and the bottom of the outer cylinder, and the elastic force of the first spring is greater than that of the second spring.
Preferably, a pressing part is arranged at the top of the push rod.
Preferably, the injection cavity is in a sphere structure, a cube structure, a cuboid structure, a cylinder structure or a polyhedron structure.
Preferably, the injection device further comprises a shell, wherein the pressure cavity, the injection cavity, the first injection piece, the second injection piece, the communicating pipe and the control piece are all arranged in the shell, and the shell is provided with a first opening communicated with the medicine adding port and a second opening used for penetrating through the control piece.
When the pneumatic driving injection device provided by the invention is used, firstly, the one-way valve can be utilized to communicate the first injection piece and the second injection piece with the drug outlet, the drug liquid is injected into the injection cavity through the drug adding port, then the drug adding port is plugged, and then the pressure cavity can be pressed to enable the film to deform so as to transfer pressure to the injection cavity, so that the drug liquid flows into the first injection piece and the second injection piece through the one-way valve. The first injection part is used for continuously injecting the needed liquid medicine into the human body, and when the dosage of the liquid medicine needs to be increased, the control part can be used for controlling the second injection part to perform liquid injection operation, so that the liquid medicine in the second injection part enters the first injection part through the communicating pipe and flows into the human body again. The driving pressure of the injection operation is air pressure transmission, so that the friction force influence on each part in the liquid medicine transmission process is low, the injection precision and the injection speed are improved, and the phenomenon of air pressure weakening caused by aging of the device along with the time is avoided.
In summary, the pneumatic driving injection device provided by the invention can improve the injection speed and precision of the injector.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pneumatically driven injection device according to the present invention;
FIG. 2 is a schematic diagram of the structure of the sliding valve in communication with the fluid inlet;
fig. 3 is a schematic view of the structure of the slide valve when the slide valve is communicated with the liquid outlet.
In fig. 1-3:
the injection device comprises a pressure cavity 1, an injection cavity 2, a film 3, a first injection piece 4, a second injection piece 5, a communicating pipe 6, a control piece 7, a medicine adding port 8, a one-way valve 9, a medicine outlet 10, a capillary glass tube 11, an indwelling needle 12, an outer cylinder 13, an inner cylinder 14, a connecting part 15, a piston 16, a push rod 17, a sliding valve 18, a liquid inlet 19, a liquid outlet 20, a circulating port 21, a multiplex piece 22, a first spring 23, a second spring 24, a pressing part 25 and a shell 26.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The core of the invention is to provide a pneumatic driving injection device which can improve the injection speed and the injection precision of an injector.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an air pressure driving injection device according to the present invention; FIG. 2 is a schematic diagram of the structure of the sliding valve in communication with the fluid inlet; fig. 3 is a schematic view of the structure of the slide valve when the slide valve is communicated with the liquid outlet.
The present embodiment provides a pneumatically driven injection device comprising: the injection device comprises a pressure cavity 1 for containing compressed gas, an injection cavity 2 for containing liquid medicine, a film 3 for separating the pressure cavity 1 and the injection cavity 2, a first injection part 4 for continuously injecting the liquid medicine into a human body, a second injection part 5 for quantitatively injecting the liquid medicine into the first injection part 4, a communicating pipe 6 for communicating the first injection part 4 and the second injection part 5 and a control part 7 for controlling the liquid injection process of the second injection part 5, wherein the injection cavity 2 is provided with a medicine adding port 8 and a medicine outlet 10, and the first injection part 4 and the second injection part 5 are communicated with the medicine outlet 10 through a one-way valve 9.
The pressure chamber 1 is sealed with compressed gas, and the pressure chamber 1 is mainly used for providing pressure to the liquid medicine in the injection chamber 2. Because the membrane 3 is sealed between the pressure chamber 1 and the injection chamber 2, the membrane 3 is used for sealing the liquid medicine in the injection chamber 2, as shown in fig. 1, one side wall surface of the membrane 3 is used for contacting with the liquid medicine, the other side wall surface of the membrane 3 is used for contacting with the compressed gas in the pressure chamber 1, and the membrane 3 is of a flexible structure, therefore, the pressure of the pressure chamber 1 can be transmitted to the injection chamber 2 at any time, so that the liquid medicine is transmitted to the first injection piece 4 and the second injection piece under the action of pressure difference.
In addition, it should be noted that, when the pressure of the injection chamber 2 and the pressure in the pressure chamber 1 are equal, it may be assumed that the volume of the pressure chamber 1 is VB, the internal pressure of the pressure chamber 1 is PB in the initial state, and when the liquid medicine is completely discharged and the compressed gas fills the entire pressure chamber 1, the volume of the pressure chamber 1 is vc=va+vb, and the internal pressure of the pressure chamber 1 is PC. From Boyle's law it follows that: the quantitative gas in the closed container has inverse proportion relation between the pressure and the volume of the gas under constant temperature, namely: p1=v1=p2×v2.
The following formula can be derived: pb=pc×vc=pc× (va+vb).
As is known from boyle's law, when the volume of gas in the closed vessel increases, the pressure in the closed vessel decreases, i.e., PB is greater than PC. Let pc=k×pb, K is less than 1.
Pb=pc (va+vb) =kpb (va+vb), where vb=k (va+vb).
The method can obtain: vb=va×k/(1-K).
The pressure chamber 1 is manufactured according to the principle, namely, the pressure intensity of each part in the communicated closed chamber is equal. The pressure chamber 1 can be designed into any shape, and meanwhile, as the pressure chamber 1 is filled with gas, the liquid medicine can be driven to move through air pressure, and the structure is simpler and lighter than a metal spring structure. The device has the advantages that: in the whole pressure transmission process, the friction force influence on each part is smaller, the liquid medicine transmission precision is higher, the response speed of liquid medicine transmission is faster, and the pressure weakening caused by aging of the device structure along with the time is avoided.
The shape, structure, size, position and the like of the pressure cavity 1, the injection cavity 2, the film 3, the first injection part 4, the second injection part 5, the communicating pipe 6, the control part 7, the medicine adding port 8 and the medicine outlet 10 can be determined according to actual conditions and actual demands in the actual application process.
When the pneumatically driven injection device provided by the invention is used, firstly, the check valve 9 can be utilized to communicate the first injection piece 4 and the second injection piece 5 with the drug outlet 10, the drug liquid is injected into the injection cavity 2 through the drug adding port 8, the drug adding port 8 is plugged, and then the pressure cavity 1 can be pressed to deform the film 3 to transmit pressure to the injection cavity 2, so that the drug liquid flows into the first injection piece 4 and the second injection piece 5 through the check valve 9. The first injection part 4 can continuously inject the needed liquid medicine into the human body, and when the dosage of the liquid medicine needs to be increased, the control part 7 can be used for controlling the second injection part 5 to perform the liquid injection operation, so that the liquid medicine in the second injection part 5 enters the first injection part 4 through the communicating pipe 6 and flows into the human body again. The driving pressure of the injection operation is air pressure transmission, so that the friction force influence on each part in the liquid medicine transmission process is low, the injection precision and the injection speed are improved, and the phenomenon of air pressure weakening caused by aging of the device along with the time is avoided.
In summary, the pneumatic driving injection device provided by the invention can improve the injection speed and precision of the injector.
On the basis of the above embodiment, it is preferable that the first injection 4 includes a capillary glass tube 11 communicating with the check valve 9 and an indwelling needle 12 communicating with the capillary glass tube 11.
The needle of the indwelling needle 12 may be inserted into a human body to perform a drug solution injection operation on the human body. The capillary glass tube 11 is a mechanism for restricting the flow of the chemical liquid, and in the case where the size of the capillary glass tube 11 is constant, the flow rate of the chemical liquid flowing through the capillary glass tube 11 is proportional to the pressure in the injection chamber 2. That is, the capillary glass tube 11 and the retaining needle 12 are matched, so that the liquid medicine can be continuously injected into the human body.
The shape, structure, size, position and the like of the capillary glass tube 11 and the indwelling needle 12 can be determined according to actual conditions and actual demands in the actual application process.
Preferably, the second injection device 5 comprises an outer cylinder 13, an inner cylinder 14 capable of moving up and down relative to the inner wall of the outer cylinder 13, and a connecting part 15, wherein the inner cylinder 14 is used for containing a liquid medicine for quantitative injection, and the bottom of the outer cylinder 13 is connected with the top of the connecting part 15; the control member 7 comprises a piston 16 capable of moving up and down along the inner wall of the inner cylinder 14, a push rod 17 for pushing the piston 16 to move, and a sliding valve 18 capable of moving up and down along the inner wall of the connecting portion 15, wherein the inner cylinder 14 is communicated with the sliding valve 18, a liquid inlet 19 communicated with the one-way valve 9 is arranged at the upper part of the connecting portion 15, a liquid outlet 20 communicated with the communicating pipe 6 is arranged at the lower part of the connecting portion 15, and a flow port 21 selectively communicated with the liquid inlet 19 or the liquid outlet 20 is arranged at the sliding valve 18.
It should be noted that, the first injection part 4 and the second injection part 5 are both communicated with the injection cavity 2 through the one-way valve 9, and the one-way valve 9 can control the flow direction of the liquid medicine, so that the liquid medicine can only flow from bottom to top. When the injection amount of the liquid medicine is required to be increased for a human body, the piston 16 and the push rod 17 are pushed to move, so that the piston 16 pushes the inner cylinder 14 and the liquid medicine in the inner cylinder 14 to move downwards, the sliding valve 18 is driven to move downwards when the inner cylinder 14 moves downwards, and the circulation port 21 of the sliding valve 18 is selectively communicated with the liquid inlet 19 or the liquid outlet 20 through the sliding valve 18 which slides upwards and downwards. When the flow port 21 moves downwards to be aligned with the liquid outlet 20, the push rod 17 is pushed continuously, so that the liquid medicine in the inner cylinder 14 passes through the liquid outlet 20, the communicating pipe 6 and the indwelling needle 12 and is injected into a human body. When the piston 16 and the push rod 17 are moved upwards, the circulation port 21 and the liquid inlet 19 are aligned, so that the inner cylinder 14 can suck the liquid medicine from the injection cavity 2 again under the action of the pressure difference, the one-way valve 9 and other components.
The shapes, structures, sizes, etc. of the outer cylinder 13, the inner cylinder 14, the connecting portion 15, the piston 16, the push rod 17, and the slide valve 18 can be determined according to actual conditions and actual demands in the actual use process.
Preferably, the control member 7 further comprises a reset member 22 for automatically resetting the push rod 17. That is, after the quantitative injection operation is completed, the push rod 17, the piston 16 and other parts can be restored to the initial position through the resetting action of the resetting, so that the circulation port 21 and the liquid inlet 19 are opposite, and the inner cylinder 14 sucks the liquid medicine from the injection cavity 2 again.
On the basis of the above embodiment, it is preferable that the return member 22 includes a first spring 23 and a second spring 24, the first spring 23 being wound between the outer peripheral portion of the push rod 17 and the top portion of the piston 16, the second spring 24 being wound between the outer peripheral portion of the inner cylinder 14 and the bottom portion of the outer cylinder 13, the elastic force of the first spring 23 being greater than the elastic force of the second spring 24.
It should be noted that, the operation schematic diagrams of the sliding valve 18 are shown in fig. 2 and 3, wherein, since the elastic force of the first spring 23 is greater than that of the second spring 24, the flow port 21 and the liquid inlet 19 of the sliding valve 18 are opposite to each other in the initial state, so that the liquid medicine in the injection cavity 2 can flow into the inner cylinder 14 under the action of the pressure difference and the check valve 9. When the operator presses the push rod 17, the piston 16, the inner tube 14, the sliding valve 18 and other parts move downward, and at this time, the flow port 21 moves downward to be opposite to the liquid outlet 20, and the operator continues to press the push rod 17, so that the liquid medicine in the inner tube 14 can be injected into the human body through the liquid outlet 20, the communicating tube 6 and the indwelling needle 12. After the push rod 17 is released, the push rod 17 can move upwards under the elastic action of the first spring 23 and the second spring 24, so that the circulation port 21 and the liquid inlet 19 are opposite to each other, and the liquid medicine in the injection cavity 2 flows into the inner cylinder 14 again under the action of the pressure difference and the one-way valve 9.
The shape, structure, size, etc. of the first spring 23 and the second spring 24 may be determined according to actual conditions and actual demands in the actual application process.
Preferably, the top of the push rod 17 is provided with a pressing portion 25, so that an operator can press the push rod 17 through the pressing portion 25, i.e., when additional doses of the liquid medicine are required, the operator can press the pressing portion 25.
Preferably, the injection cavity 2 is in a sphere structure, a cube structure, a cuboid structure, a cylinder structure or a polyhedron structure. The pressure chamber 1 may be designed in any shape to increase the volume of the pressure chamber 1 as much as possible with the use of the space in the pump in a limited space in order to improve injection accuracy. The pressure chamber 1 is not necessarily limited to a cylindrical syringe, and may be designed to have a structure other than a cylindrical shape.
Preferably, the injection device further comprises a shell 26, wherein the pressure cavity 1, the injection cavity 2, the first injection part 4, the second injection part 5, the communicating pipe 6 and the control part 7 are all arranged in the shell 26, and the shell 26 is provided with a first opening communicated with the medicine adding port 8 and a second opening used for penetrating the control part 7, so that the overall structure of the device is compact, and the occupied space is small.
The shape, structure, size, etc. of the housing 26 can be determined according to actual conditions and actual demands during actual use.
It should be noted that, in the present application, the first injection part 4 and the second injection part 5, the first spring 23 and the second spring 24, and the first opening and the second opening are mentioned, where the first and the second are merely to distinguish the difference of the positions, and there is no sequential distinction.
It should be noted that the positional relationship indicated by "above", "below", and the like in the present application is based on the positional relationship shown in the drawings, and is merely for simplicity of description and ease of understanding, and does not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. Any combination of all the embodiments provided in the present invention is within the protection scope of the present invention, and will not be described herein.
The pneumatic driving injection device provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (6)
1. A pneumatically driven injection device, comprising: the medical device comprises a pressure cavity (1) for sealing and containing compressed gas, an injection cavity (2) for containing medical liquid, a film (3) for sealing and separating the pressure cavity (1) and the injection cavity (2), a first injection piece (4) for continuously injecting the medical liquid into a human body, a second injection piece (5) for quantitatively injecting the medical liquid into the first injection piece (4), a communicating pipe (6) for communicating the first injection piece (4) and the second injection piece (5) and a control piece (7) for controlling the liquid injection process of the second injection piece (5), wherein the injection cavity (2) is provided with a medicine adding port (8) and a medicine outlet (10), and the first injection piece (4) and the second injection piece (5) are communicated with the medicine outlet (10) through a one-way valve (9); the pressure of the injection cavity (2) is equal to the pressure in the pressure cavity (1), and the pressure of the pressure cavity (1) is transmitted to the injection cavity (2) at any time so that the liquid medicine is transmitted to the first injection piece (4) and the second injection piece (5) under the action of pressure difference;
the first injection piece (4) comprises a capillary glass tube (11) communicated with the one-way valve (9) and an indwelling needle (12) communicated with the capillary glass tube (11), and the capillary glass tube (11) is used for limiting the flow of liquid medicine;
the second injection part (5) comprises an outer cylinder (13), an inner cylinder (14) capable of moving up and down relative to the inner wall of the outer cylinder (13) and a connecting part (15), wherein the inner cylinder (14) is used for containing the liquid medicine for quantitative injection, and the bottom of the outer cylinder (13) is connected with the top of the connecting part (15);
the control piece (7) comprises a piston (16) capable of moving up and down along the inner wall of the inner cylinder (14), a push rod (17) for pushing the piston (16) to move and a sliding valve (18) capable of moving up and down along the inner wall of the connecting part (15), the inner cylinder (14) is communicated with the sliding valve (18), a liquid inlet (19) communicated with the one-way valve (9) is formed in the upper portion of the connecting part (15), a liquid outlet (20) communicated with the communicating pipe (6) is formed in the lower portion of the connecting part (15), and a circulation port (21) for selectively communicating with the liquid inlet (19) or the liquid outlet (20) is formed in the sliding valve (18).
2. A pneumatically driven injection device according to claim 1, characterized in that the control member (7) further comprises a reset member (22) for automatically resetting the push rod (17).
3. A pneumatically driven injection device according to claim 2, characterized in that the return member (22) comprises a first spring (23) and a second spring (24), the first spring (23) being wound between the outer peripheral portion of the push rod (17) and the top of the piston (16), the second spring (24) being wound between the outer peripheral portion of the inner cylinder (14) and the bottom of the outer cylinder (13), the spring force of the first spring (23) being greater than the spring force of the second spring (24).
4. A pneumatically driven injection device according to claim 1, characterized in that the top of the push rod (17) is provided with a pressing portion (25).
5. A pneumatically driven injection device according to any one of claims 1 to 4, characterized in that the injection cavity (2) is of a sphere, cube, cuboid, cylinder or polyhedron configuration.
6. A pneumatically driven injection device according to any one of claims 1 to 4, further comprising a housing (26), wherein the pressure chamber (1), the injection chamber (2), the first injection member (4), the second injection member (5), the communication tube (6) and the control member (7) are all arranged within the housing (26), the housing (26) being provided with a first opening communicating with the dosing port (8) and a second opening for passing through the control member (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210248209.4A CN114632218B (en) | 2022-03-14 | 2022-03-14 | Pneumatic driving injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN115154762B (en) * | 2022-07-27 | 2024-03-08 | 重庆倍加医疗器械有限公司 | Pneumatic driving injector |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4886499A (en) * | 1986-12-18 | 1989-12-12 | Hoffmann-La Roche Inc. | Portable injection appliance |
| DE19614337A1 (en) * | 1996-02-05 | 1997-08-07 | Lang Volker | Assembly for infusion therapy |
| CN102245130A (en) * | 2008-10-10 | 2011-11-16 | 米卢克斯控股股份有限公司 | Infusion of drugs |
| CN102655896A (en) * | 2009-11-23 | 2012-09-05 | 斯帕克有限责任公司 | Device for dosing and adjusting the flow of a radiopaque agent to be used in performing an angiography |
| CN105979986A (en) * | 2013-10-18 | 2016-09-28 | 赛诺菲-安万特德国有限公司 | Injection device for delivery of a liquid medicament with medicament container displacement |
| CN106390237A (en) * | 2015-08-03 | 2017-02-15 | 贺小军 | Injector |
| WO2018043927A1 (en) * | 2016-08-31 | 2018-03-08 | 중소기업은행 | Electroosmotic pump |
| CN109363796A (en) * | 2018-10-30 | 2019-02-22 | 贵州牧林农业科技发展有限公司 | A kind of domestic animal continuous injector for domestic animals |
| CN110191732A (en) * | 2017-01-24 | 2019-08-30 | 赛诺菲-安万特德国有限公司 | Medicament delivery device |
| KR20190126520A (en) * | 2018-05-02 | 2019-11-12 | 주식회사 피테크 | Constant velocity infusion device for painless syringe and painless sylinge having the same |
| CN114052867A (en) * | 2021-11-16 | 2022-02-18 | 南通市妇幼保健院 | Artificial insemination transplanting device for reproductive medicine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7270648B2 (en) * | 2002-12-23 | 2007-09-18 | Farhad Kazemzadeh | Drug delivery apparatus |
-
2022
- 2022-03-14 CN CN202210248209.4A patent/CN114632218B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4886499A (en) * | 1986-12-18 | 1989-12-12 | Hoffmann-La Roche Inc. | Portable injection appliance |
| DE19614337A1 (en) * | 1996-02-05 | 1997-08-07 | Lang Volker | Assembly for infusion therapy |
| CN102245130A (en) * | 2008-10-10 | 2011-11-16 | 米卢克斯控股股份有限公司 | Infusion of drugs |
| CN102655896A (en) * | 2009-11-23 | 2012-09-05 | 斯帕克有限责任公司 | Device for dosing and adjusting the flow of a radiopaque agent to be used in performing an angiography |
| CN105979986A (en) * | 2013-10-18 | 2016-09-28 | 赛诺菲-安万特德国有限公司 | Injection device for delivery of a liquid medicament with medicament container displacement |
| CN106390237A (en) * | 2015-08-03 | 2017-02-15 | 贺小军 | Injector |
| WO2018043927A1 (en) * | 2016-08-31 | 2018-03-08 | 중소기업은행 | Electroosmotic pump |
| CN110191732A (en) * | 2017-01-24 | 2019-08-30 | 赛诺菲-安万特德国有限公司 | Medicament delivery device |
| KR20190126520A (en) * | 2018-05-02 | 2019-11-12 | 주식회사 피테크 | Constant velocity infusion device for painless syringe and painless sylinge having the same |
| CN109363796A (en) * | 2018-10-30 | 2019-02-22 | 贵州牧林农业科技发展有限公司 | A kind of domestic animal continuous injector for domestic animals |
| CN114052867A (en) * | 2021-11-16 | 2022-02-18 | 南通市妇幼保健院 | Artificial insemination transplanting device for reproductive medicine |
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| CN114632218A (en) | 2022-06-17 |
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