CN110201265B - Infusion device - Google Patents
Infusion device Download PDFInfo
- Publication number
- CN110201265B CN110201265B CN201910622456.4A CN201910622456A CN110201265B CN 110201265 B CN110201265 B CN 110201265B CN 201910622456 A CN201910622456 A CN 201910622456A CN 110201265 B CN110201265 B CN 110201265B
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- chamber
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- 238000001802 infusion Methods 0.000 title claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 230000008859 change Effects 0.000 claims abstract description 6
- 239000003814 drug Substances 0.000 claims description 29
- 238000005192 partition Methods 0.000 claims description 23
- 239000012530 fluid Substances 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- 239000002775 capsule Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 208000032912 Local swelling Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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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
- A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- 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
-
- 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
- A61M2005/14506—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons mechanically driven, e.g. spring or clockwork
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
本发明提供了一种输液装置，涉及注射器械技术领域，本发明提供的输液装置，包括：壳体、活塞组件和推压器件；活塞组件设置在壳体内，并将壳体的内腔分隔形成第一密封腔和第二密封腔；推压器件用于使活塞组件具有沿壳体的内腔移动的趋势，以改变第二密封腔的容积，并压缩第一密封腔；第一密封腔用于容纳药剂，且壳体设有连通第一密封腔的第一通道；壳体设有连通第二密封腔的第二通道，第二通道内设第一限流组件，第一限流组件用于改变第二通道的开度，以调节活塞组件的移动速度，缓解了现有技术中输液速率不稳定的技术问题。
The present invention provides an infusion device, which relates to the technical field of injection devices. The infusion device provided by the present invention includes: a casing, a piston assembly and a pushing device; the piston assembly is arranged in the casing, and separates the inner cavity of the casing to form a The first sealing chamber and the second sealing chamber; the pushing device is used to make the piston assembly have a tendency to move along the inner chamber of the housing, so as to change the volume of the second sealing chamber and compress the first sealing chamber; the first sealing chamber is used for The housing is provided with a first channel that communicates with the first sealing cavity; the housing is provided with a second channel that communicates with the second sealing cavity; By changing the opening of the second channel to adjust the moving speed of the piston assembly, the technical problem of unstable infusion rate in the prior art is alleviated.
Description
Technical Field
The invention relates to the technical field of injection instruments, in particular to an infusion device.
Background
In the traditional infusion process, a patient needs to utilize the pressure difference of liquid medicine to input the liquid medicine into the body in a sitting posture or a lying posture in an infusion room of a hospital, the movement of the patient is limited due to infusion, the anxiety of the patient is increased, the patient occupies a medical room for a long time, and the utilization rate of medical resources is also reduced. In addition, the administration speed is affected by the infusion pressure, thereby easily causing instability of the administration speed during the movement of the patient. The administration speed is reduced, the infusion time is longer, and the pain of a patient is easily caused; too fast administration will cause local swelling of the patient's body and is not conducive to the absorption of the drug by the body.
Disclosure of Invention
The invention aims to provide an infusion device to solve the technical problem of unstable infusion rate in the prior art.
In a first aspect, the present invention provides an infusion device comprising: a housing, a piston assembly and a biasing means; the piston assembly is arranged in the shell and divides an inner cavity of the shell into a first sealing cavity and a second sealing cavity; said housing having an inner cavity extending axially therealong, said biasing means for causing said piston assembly to have a tendency to move axially along said inner cavity of said housing to change the volume of said second sealed chamber and compress said first sealed chamber; the first sealed cavity is used for containing medicament, and the shell is provided with a first channel communicated with the first sealed cavity; the shell is provided with a second channel communicated with the second sealing cavity, a first flow limiting assembly is arranged in the second channel, and the first flow limiting assembly is used for changing the opening degree of the second channel so as to adjust the moving speed of the piston assembly.
With reference to the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the first current limiting assembly includes: the first loop, the first core, the first elastic element and the adjusting piece; said first collar being connected within said second channel, said first core and said first resilient element being respectively disposed within said second channel, said first resilient element being configured to cause said first core to have a tendency to close said first collar; the adjusting piece is used for driving the first core to adjust the opening degree of the second channel.
In combination with the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the adjusting piece is screwed to the first collar, and the adjusting piece abuts against the first core.
With reference to the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the housing includes: the sleeve comprises a sleeve body, a first cover body, a partition plate and a second cover body, wherein the partition plate is connected in the sleeve body, the first cover body covers one end of the sleeve body, and the second cover body covers the other end of the sleeve body; the sleeve body is sleeved with the piston assembly, and a second sealing cavity is formed between the piston assembly and the first cover body; the second channel is arranged on the first cover body.
With reference to the third possible implementation manner of the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the second channel includes: a first groove and a first hole site; the first groove is arranged on one side, facing the second sealing cavity, of the first cover body; the first hole site is disposed on the first cover, and the first hole site is in fluid communication with the first groove.
With reference to the third possible implementation form of the first aspect, the present invention provides a fifth possible implementation form of the first aspect, wherein the piston assembly includes: the plug comprises a first plug body, a middle shaft and a second plug body; the middle shaft is connected between the first plug body and the second plug body, and the middle shaft is inserted into the partition plate; the first cover body, the first plug body, the partition plate, the second plug body and the second cover body are sequentially arranged along the axial direction of the shell, and the inner cavity of the sleeve body is partitioned by the first plug body, the partition plate and the second plug body to form a second sealing cavity, a first sealing cavity and a second cavity which are sequentially distributed; the sleeve body is provided with a first air hole communicated with the first cavity and a second air hole communicated with the second cavity.
In combination with the fifth possible implementation manner of the first aspect, the present invention provides a sixth possible implementation manner of the first aspect, wherein a side of the partition plate facing the second plug body is provided with a second groove, and the second groove is in fluid communication with the first channel; and the second plug body is provided with a first bulge matched with the second groove.
With reference to the first aspect, the present invention provides a seventh possible implementation manner of the first aspect, wherein a third passage communicating with the first sealed cavity is provided on the housing; and a second flow limiting assembly is arranged in the third channel and is used for blocking the outflow of the fluid in the first sealing cavity from the third channel and opening the third channel when the fluid flows to the first sealing cavity through the third channel.
With reference to the seventh possible implementation manner of the first aspect, the present invention provides an eighth possible implementation manner of the first aspect, wherein the second current limiting assembly includes: a second loop, a second core and a second elastic element; the second ring sleeve is connected in the third channel, the second core body and the second elastic element are both arranged in the third channel, and the second elastic element is used for enabling the second core body to have the tendency of plugging the second ring sleeve.
In combination with the first aspect, the present disclosure provides a ninth possible implementation manner of the first aspect, wherein the pushing means comprises a third elastic element for giving the piston assembly a tendency to compress the first sealed chamber.
The embodiment of the invention has the following beneficial effects: adopt piston assembly to set up in the casing, and separate the inner chamber of casing and form first seal chamber and second seal chamber, bulldoze the device and be used for making piston assembly have the trend of moving along the inner chamber of casing, in order to change the volume of second seal chamber, and compress first seal chamber, first seal chamber is used for holding the medicament, and the casing is equipped with the first passageway of intercommunication first seal chamber, the casing is equipped with the second passageway of intercommunication second seal chamber, establish first current-limiting subassembly in the second passageway, first current-limiting subassembly is used for changing the aperture of second passageway, in the mode of adjusting piston assembly's removal speed, the aperture through first current-limiting subassembly regulation second passageway, thereby ensure piston assembly's removal speed stable, and then make infusion rate stable. In addition, the piston assembly is driven by the pushing device, so that the patient can freely move in the infusion process without the need of standing or sitting and standing for waiting.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a first cross-sectional view of an infusion device in accordance with an embodiment of the present invention;
FIG. 2 is a second cross-sectional view of an infusion device in accordance with an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of position A of FIG. 1;
FIG. 4 is a schematic view of an adjustment member of an infusion device in accordance with an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of position B of FIG. 2;
fig. 6 is an enlarged schematic view of position C in fig. 1.
Icon: 100-a housing; 101-a first sealed chamber; 102-a second sealed cavity; 103-a first channel; 1031-rubber sheet; 104-a second channel; 1041-a first groove; 1042 — a first hole site; 105-a first current limiting component; 1051-a first loop; 1052-a first core; 1053-a first resilient element; 1054-an adjustment member; 1055-a first via; 1056-a second via; 106-a third channel; 107-a second current limiting component; 1071-a second loop; 1072 — a second core; 1073-a second elastic element; 108-a first chamber; 1081-a first air vent; 109-a second chamber; 1091-second vent; 110-a sheath body; 120-a first cover; 130-a separator; 131-a second groove; 132-a third groove; 140-a second cover; 200-a piston assembly; 210-a first plug body; 211-a second boss; 220-centre axis; 230-a second plug body; 231-a first boss; 300-pushing means.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 in specific cases to those skilled in the art.
Example one
As shown in fig. 1, an infusion device provided by an embodiment of the invention includes: a housing 100, a piston assembly 200 and a pushing means 300; the piston assembly 200 is arranged in the shell 100 and divides the inner cavity of the shell 100 into a first sealed cavity 101 and a second sealed cavity 102; the housing 100 has an inner cavity extending axially along it, and the biasing means 300 serves to impart a tendency to the piston assembly 200 to move axially along the inner cavity of the housing 100 to change the volume of the second sealed chamber 102 and compress the first sealed chamber 101; the first sealed cavity 101 is used for containing medicament, and the shell 100 is provided with a first channel 103 communicated with the first sealed cavity 101; the housing 100 is provided with a second passage 104 communicated with the second seal chamber 102, a first flow restriction assembly 105 is arranged in the second passage 104, and the first flow restriction assembly 105 is used for changing the opening degree of the second passage 104 so as to adjust the moving speed of the piston assembly 200.
Specifically, the piston assembly 200 is inserted into the casing 100, and a sealing ring is arranged between the piston assembly 200 and the inner wall of the casing 100; the first sealed cavity 101 is used for storing the medicament, and the pushing device 300 drives the piston assembly 200, so that the space of the first sealed cavity 101 is compressed, and the medicament in the first sealed cavity 101 can be discharged through the first channel 103; in this process, the infusion tube may be used to communicate the body vein with the first passageway 103, thereby injecting the medicament into the patient. When the first capsule 101 is compressed, the second capsule 102 is easily expanded or contracted, and the gas flows into the second capsule 102 or is exhausted through the second channel 104. The opening degree of the second channel 104 is adjusted by the first flow limiting assembly 105, so that the flow rate of the fluid flowing through the second channel 104 can be limited, the moving speed of the piston assembly 200 is ensured to be stable, and the infusion speed is stable. The biasing means 300 may be a spring or an elastic rubber band, and for example, the biasing means 300 is a spring which abuts between the piston assembly 200 and the housing 100 to provide the piston assembly 200 with a movement tendency to compress the first sealing chamber 101.
When the medicine is injected into the first sealed chamber 101, the medicine can be injected into the first sealed chamber 101 through the first passage 103 by using a syringe, and the pressure inside the first sealed chamber 101 is increased, so that the pushing piston assembly 200 moves against the elastic force of the pushing device 300; during infusion, the infusion pipeline is communicated between the human body vein and the first channel 103, and the pushing device 300 pushes the piston assembly 200 to compress the first sealed cavity 101, so that the medicament in the first sealed cavity 101 flows into the patient through the first channel 103 and the infusion pipeline.
As shown in fig. 3, the first current limiting assembly 105 includes: a first loop 1051, a first core 1052, a first resilient member 1053, and an adjustment member 1054; first loop 1051 is attached within second channel 104, first core 1052 and first resilient element 1053 are respectively disposed within second channel 104, first resilient element 1053 is configured to provide first core 1052 with a tendency to occlude first loop 1051; the adjusting member 1054 is used to drive the first core 1052 to adjust the opening degree of the second channel 104. The first collar 1051 is screwed to the inner wall of the second channel 104 and coated with a sealant to ensure the sealing of the second channel 104.
Specifically, first collar 1051 is fixedly attached within second channel 104 by a threaded fit or by a snap ring, first core 1052 is configured as a ball, first resilient element 1053 is configured as a spring, first core 1052 and first resilient element 1053 are both located within second channel 104, and first core 1052 is abutted between first resilient element 1053 and first collar 1051, first resilient element 1053 pushes against first core 1052, thereby giving first core 1052 a tendency to occlude first collar 1051; the adjustment member 1054 is used to push against the first core 1052, thereby adjusting the spacing between the first core 1052 and the first collar 1051, when the first core 1052 is separated from the first collar 1051, the gap between the first core 1052 and the first collar 1051 is available for fluid to enter and exit the second sealed cavity 102; by adjusting the distance between the first core 1052 and the first loop 1051, the size of the gap between the first core 1052 and the first loop 1051 can be changed, thereby realizing the opening adjustment of the second channel 104.
Further, when the air pressure inside the second sealed cavity 102 is less than the external air pressure, under the action of the air pressure difference, the first core 1052 presses the first elastic element 1053, so that the external air enters the second sealed cavity 102 through the gap between the first core 1052 and the first loop 1051; during injection, the size of the gap between the first core 1052 and the first loop 1051 is changed by the adjusting piece 1054, and then the opening degree of the second channel 104 is adjusted, so that the exhaust rate of the second sealing cavity 102 can be adjusted, the adjustment of the injection rate is realized, the influence of the change of the lying posture of the patient on the injection rate can be relieved, and the stability of the injection rate is improved.
Further, adjustment member 1054 is threaded to first collar 1051 and adjustment member 1054 abuts first core 1052. Wherein the axis of the adjusting member 1054 is parallel to the axis of the first loop 1051, the distance between the first core 1052 and the adjusting member 1054 can be adjusted by rotating the adjusting member 1054.
As shown in FIGS. 3 and 4, adjustment member 1054 is threadably engaged within the inner bore of first collar 1051, and adjustment member 1054 is provided with a through-hole such that when adjustment member 1054 presses against first core 1052 to separate first core 1052 from first collar 1051, fluid may enter and exit second sealed chamber 102 through the through-hole of adjustment member 1054, the inner bore of first collar 1051, and second passage 104.
Furthermore, a first through hole 1055 and a second through hole 1056 are arranged on the adjusting piece 1054, the first through hole 1055 is communicated with the second through hole 1056, the axis of the first through hole 1055 is parallel to the axis of the adjusting piece 1054, and an included angle is formed between the axis of the first through hole 1055 and the axis of the second through hole 1056. Further, the second through-hole 1056 is prevented from being blocked by the first core 1052, thereby ensuring that fluid can flow through the first through-hole 1055, the second through-hole 1056, the inner bore of the first collar 1051, and the second channel 104 into and out of the second sealed chamber 102.
As shown in fig. 2, the housing 100 includes: the cover body 110, the first cover body 120, the partition plate 130 and the second cover body 140, wherein the partition plate 130 is connected in the cover body 110, the first cover body 120 covers one end of the cover body 110, and the second cover body 140 covers the other end of the cover body 110; the sleeve body 110 is sleeved on the piston assembly 200, and a second sealing cavity 102 is formed between the piston assembly 200 and the first cover body 120; the second passage 104 is provided on the first cover 120. The first cover 120 and the second cover 140 are respectively connected to the housing 110 by a screw thread fit, the piston assembly 200 passes through the partition 130, a second sealed cavity 102 is formed between the piston assembly 200 and the first cover 120, and a first sealed cavity 101 is formed between the piston assembly 200 and the partition 130. Wherein, the partition 130 and the sheath body 110 are an integral structure.
As shown in fig. 1 and 2, the second channel 104 includes: a first recess 1041 and a first hole location 1042; the first groove 1041 is disposed on a side of the first cover 120 facing the second sealed cavity 102; the first hole locations 1042 are disposed on the first cover 120, and the first hole locations 1042 are in fluid communication with the first recess 1041. The first hole position 1042 extends along the radial direction of the first cover 120 and is communicated with the first recess 1041, and when the piston assembly 200 compresses the second sealed cavity 102, the distance between the piston assembly 200 and the first cover 120 gradually decreases; when the piston assembly 200 abuts against the first cover 120, since the first recess 1041 stores gas therein, pressure balance between two sides of the piston assembly 200 can be ensured, thereby preventing the piston assembly 200 from being difficult to move under the action of air pressure due to exhaustion of gas in the second sealing chamber 102.
As shown in fig. 1 and 2, the piston assembly 200 includes: a first plug body 210, a central shaft 220 and a second plug body 230; the middle shaft 220 is connected between the first plug body 210 and the second plug body 230, and the middle shaft 220 is inserted in the partition 130; the first cover body 120, the first plug body 210, the partition plate 130, the second plug body 230 and the second cover body 140 are sequentially arranged along the axial direction of the shell 100, and the first plug body 210, the partition plate 130 and the second plug body 230 divide the inner cavity of the sleeve body 110 into a second sealed cavity 102, a first cavity 108, a first sealed cavity 101 and a second cavity 109 which are sequentially distributed; the sheath 110 has a first air hole 1081 communicating with the first chamber 108 and a second air hole 1091 communicating with the second chamber 109.
Specifically, the partition 130 is provided with a shaft hole penetrating along the axial direction, the middle shaft 220 is inserted into the shaft hole, and a sealing ring is arranged between the shaft hole and the middle shaft 220; the pushing means 300 is arranged in the second chamber 109, and the pushing means 300 abuts between the second plug 230 and the second cap 140; when the first capsule 101 is filled with the medicament, the pressure inside the first capsule 101 rises, the piston assembly 200 moves along the housing 110, and the pushing device 300 is pressed, in the process, the volumes of the first capsule 101 and the second capsule 102 increase, the volumes of the first chamber 108 and the second chamber 109 decrease, the gas inside the first chamber 108 is exhausted through the first air hole 1081, and the gas inside the second chamber 109 is exhausted through the second air hole 1091; during injection, the pushing device 300 pushes the piston assembly 200 to move along the housing 110, the volumes of the first seal cavity 101 and the second seal cavity 102 gradually decrease, the volumes of the first chamber 108 and the second chamber 109 gradually increase, and the fluid flow rate of the first air hole 1081 and the fluid flow rate of the second air hole 1091 are both greater than the fluid flow rate of the second channel 104 in a fully open state, so as to ensure that the air intake and exhaust of the first chamber 108 and the second chamber 109 are smooth, and ensure that the infusion speed is determined by the opening degree of the second channel 104.
As shown in fig. 1, the side of the partition 130 facing the second plug 230 is provided with a second groove 131, and the second groove 131 is in fluid communication with the first channel 103; the second plug 230 is provided with a first protrusion 231 adapted to the second groove 131. When the volume of the first sealed cavity 101 is reduced, the first protrusion 231 is inserted into the second groove 131, so that the medicine in the first sealed cavity 101 can be further discharged, thereby reducing the residual quantity of the medicine in the first sealed cavity 101.
As shown in FIGS. 1 and 6, a drainage hole communicating with the first channel 103 is formed in the second groove 131, and when the first protrusion 231 is inserted into the second groove 131, the medicine in the second groove 131 is delivered into the patient through the drainage hole and the first channel 103.
Further, a rubber sheet 1031 is fixedly connected in the first passage 103, the first passage 103 is sealed by the rubber sheet 1031, so that the medicine is kept clean, the rubber sheet 1031 can be pierced by a needle tube during injection, the needle tube is inserted into the first passage 103, and the infusion tube is communicated with the first passage 103.
As shown in fig. 1 and fig. 2, a third groove 132 is formed on a side of the partition 130 facing the first plug body 210, and a second protrusion 211 adapted to the third groove 132 is formed on the first plug body 210; when the volume of the first chamber 108 is reduced, the second protrusion 211 is inserted into the third groove 132, so that the moving stroke of the piston assembly 200 in the infusion device with a certain axial dimension is increased, and the medicament capacity of the first seal cavity 101 can be increased.
As shown in fig. 2, the housing 100 is provided with a third passage 106 communicating with the first sealed chamber 101; a second flow restricting member 107 is disposed in the third passageway 106, and the second flow restricting member 107 is configured to block the outflow of fluid from the third passageway 106 in the first capsule 101 and to open the third passageway 106 when fluid flows through the third passageway 106 to the first capsule 101. Wherein the second flow restriction assembly 107 is configured as a one-way valve, the medicament can be injected into the first sealed cavity 101 through the second flow restriction assembly 107 and the third channel 106, and the second flow restriction assembly 107 blocks the third channel 106 during injection, thereby preventing the medicament from leaking.
As shown in fig. 2 and 5, the second current limiting assembly 107 includes: a second ring 1071, a second core 1072, and a second elastic element 1073; the second ring 1071 is attached within the third passage 106, and a second core 1072 and a second resilient element 1073 are both disposed within the third passage 106, the second resilient element 1073 serving to impart a tendency to the second core 1072 to close off the second ring 1071. The outer side wall of the second ring 1071 is hermetically connected with the inner wall of the third channel 106, the third channel 106 is arranged on the partition 130, and the third channel 106 is communicated with the first seal cavity 101; the second core 1072 abuts between the second ring 1071 and the second elastic element 1073. During injection of the medicament into the first sealed cavity 101, the second core 1072 compresses the second resilient element 1073 under the pressure of the medicament, so that a gap is formed between the second core 1072 and the second ring 1071, and the medicament can flow through the second ring 1071 and the third channel 106 into the first sealed cavity 101; when the injection of the drug into the first sealed cavity 101 is stopped, the second elastic element 1073 pushes the second core body 1072, so that the second core body 1072 abuts against the second ring 1071, and the second ring 1071 is blocked, thereby preventing the drug in the first sealed cavity 101 from leaking.
Further, the pushing means 300 comprises a third resilient element for providing the piston assembly 200 with a tendency to compress the first sealed chamber 101. Wherein, the first elastic element 1053, the second elastic element 1073 and the third elastic element can all adopt springs; when the first sealed cavity 101 is filled with the medicament, the pushing device 300 is elastically deformed under force; the piston assembly 200 is driven by the elastic force of the pushing means 300 during infusion, so that the housing 100 can be strapped to the wrist of the patient for the patient to move about during infusion without hanging the medicine bottle and ensuring that the patient is in a resting or sitting position to provide the hydraulic pressure for the administration of the medicine into the body. The patient can infuse when walking, has improved and has removed the convenience, and need not to occupy the medical bed, saves the waiting time in the hospital, is favorable to reducing medical resource and occupies.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An infusion device, comprising: a housing (100), a piston assembly (200) and a pushing means (300);
the piston assembly (200) is arranged in the shell (100) and divides the inner cavity of the shell (100) into a first sealed cavity (101) and a second sealed cavity (102);
said housing (100) having an inner cavity extending axially therealong, said biasing means (300) being adapted to cause said piston assembly (200) to have a tendency to move axially along said inner cavity of said housing (100) to change the volume of said second sealed chamber (102) and compress said first sealed chamber (101);
the first sealed cavity (101) is used for containing medicament, and the shell (100) is provided with a first channel (103) communicated with the first sealed cavity (101);
the shell (100) is provided with a second channel (104) communicated with the second sealed cavity (102), a first flow limiting assembly (105) is arranged in the second channel (104), and the first flow limiting assembly (105) is used for changing the opening degree of the second channel (104) so as to adjust the moving speed of the piston assembly (200);
the housing (100) includes: the sleeve comprises a sleeve body (110), a first cover body (120), a partition plate (130) and a second cover body (140), wherein the partition plate (130) is connected in the sleeve body (110), the first cover body (120) covers one end of the sleeve body (110), and the second cover body (140) covers the other end of the sleeve body (110);
the sleeve body (110) is sleeved on the piston assembly (200), and the second sealing cavity (102) is formed between the piston assembly (200) and the first cover body (120);
the second channel (104) is disposed on the first cover (120);
the piston assembly (200) includes: the plug comprises a first plug body (210), a middle shaft (220) and a second plug body (230);
the middle shaft (220) is connected between the first plug body (210) and the second plug body (230), and the middle shaft (220) is inserted into the partition plate (130);
the first cover body (120), the first plug body (210), the partition plate (130), the second plug body (230) and the second cover body (140) are sequentially arranged along the axial direction of the shell (100), and the inner cavity of the sleeve body (110) is partitioned by the first plug body (210), the partition plate (130) and the second plug body (230) to form the second sealed cavity (102), the first cavity (108), the first sealed cavity (101) and the second cavity (109) which are sequentially distributed;
the sleeve body (110) is provided with a first air hole (1081) communicated with the first chamber (108) and a second air hole (1091) communicated with the second chamber (109).
2. The infusion device as claimed in claim 1, wherein the first flow restriction assembly (105) comprises: a first loop (1051), a first core (1052), a first resilient element (1053), and an adjustment member (1054);
the first loop (1051) is attached within the second channel (104), the first core (1052) and the first resilient element (1053) are disposed within the second channel (104), respectively, the first resilient element (1053) is configured such that the first core (1052) has a tendency to occlude the first loop (1051);
the adjusting member (1054) is used for driving the first core (1052) to adjust the opening degree of the second passage (104).
3. The infusion device as claimed in claim 2, wherein the adjustment member (1054) is threaded to the first collar (1051) and the adjustment member (1054) abuts the first core (1052).
4. The infusion device as claimed in claim 1, wherein the second channel (104) comprises: a first recess (1041) and a first bore location (1042);
the first groove (1041) is arranged on one side of the first cover body (120) facing the second sealed cavity (102);
the first bore location (1042) is disposed on the first cover (120), and the first bore location (1042) is in fluid communication with the first recess (1041).
5. The infusion device according to claim 1, characterized in that the side of the septum (130) facing the second stopper (230) is provided with a second groove (131), the second groove (131) being in fluid communication with the first channel (103);
the second plug body (230) is provided with a first bulge (231) matched with the second groove (131).
6. The infusion set according to claim 1, characterized in that the housing (100) is provided with a third channel (106) communicating with the first sealed chamber (101);
and a second flow limiting component (107) is arranged in the third channel (106), and the second flow limiting component (107) is used for blocking the outflow of the fluid in the first sealed cavity (101) from the third channel (106) and opening the third channel (106) when the fluid flows to the first sealed cavity (101) through the third channel (106).
7. The infusion device as claimed in claim 6, wherein the second flow restriction assembly (107) comprises: a second loop (1071), a second core (1072) and a second elastic element (1073);
the second collar (1071) is connected within the third channel (106), the second core (1072) and the second resilient element (1073) are both disposed within the third channel (106), the second resilient element (1073) being for imparting to the second core (1072) a tendency to close off the second collar (1071).
8. The infusion device according to claim 1, characterized in that said pushing means (300) comprises a third elastic element for giving said piston assembly (200) a tendency to compress said first hermetic chamber (101).
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| CN201910622456.4A CN110201265B (en) | 2019-07-10 | 2019-07-10 | Infusion device |
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| CN201910622456.4A CN110201265B (en) | 2019-07-10 | 2019-07-10 | Infusion device |
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| CN110201265A (en) | 2019-09-06 |
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