CN112843382A - Reciprocating type infusion advancing mechanism - Google Patents
Reciprocating type infusion advancing mechanism Download PDFInfo
- Publication number
- CN112843382A CN112843382A CN202110011666.7A CN202110011666A CN112843382A CN 112843382 A CN112843382 A CN 112843382A CN 202110011666 A CN202110011666 A CN 202110011666A CN 112843382 A CN112843382 A CN 112843382A
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- CN
- China
- Prior art keywords
- threaded pipe
- central column
- storage device
- medicine storage
- infusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001802 infusion Methods 0.000 title claims abstract description 24
- 230000007246 mechanism Effects 0.000 title claims abstract description 11
- 239000003814 drug Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14212—Pumping with an aspiration and an expulsion action
- A61M5/14216—Reciprocating piston type
-
- 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
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 a reciprocating type infusion propelling mechanism, which comprises a medicine storage device (1), an integrated piston (2) and a speed reducing motor (3); the integral piston (2) comprises a rubber soft plug (2.1), a threaded pipe (2.2) and a threaded pipe central column (2.3), the rubber soft plug (2.1) is fixed with the threaded pipe central column (2.3), and the rubber soft plug (2.1) is tightly contacted with the inner wall of the medicine storage device (1); the medicine storage device (1) and the threaded pipe (2.2) are respectively provided with threads matched with each other, and the medicine storage device (1) is arranged on the threaded pipe (2.2) through the threads; the speed reducing motor (3) is arranged on one side of the threaded pipe (2.2), and a screw rod (7) is arranged on a motor shaft of the speed reducing motor (3); the threaded pipe central column (2.3) is hollow, and the rotating rod (7) is installed in the threaded pipe central column (2.3). The invention has the advantages of simple structure, long service life, convenient use and lower cost.
Description
Technical Field
The invention relates to the field of medicine, in particular to a reciprocating type infusion propulsion mechanism.
Background
As shown in fig. 1, currently, a reduction motor is mostly used in various medical application type infusion pumps to drive a screw rod to push a medicine storage device to achieve liquid medicine infusion.
When the infusion pump works, the medicine storage device filled with the liquid medicine is arranged in the fixed container and is in close contact with the screw rod through the piston, and the speed reduction motor drives the sliding screw nut to rotate through the gear. Because the screw nut is in a fixed state, the screw rod drives the piston to push forwards under the driving of the screw nut under the reaction force of the screw nut, and the rotary motion of the motor is converted into linear motion, so that the infusion operation of the liquid medicine is realized.
According to the principle analysis of the traditional infusion pump, the traditional infusion pump has the following defects in practical application:
1. can only be pushed in one direction and cannot move back and forth; the screw rod converts rotary motion into linear motion under the pushing of the speed reducing motor, pushes the piston of the medicine storage device to move forwards, and realizes the infusion operation of the liquid medicine, but because the screw rod and the piston are of a separated structure, when the motor moves reversely, the screw rod cannot drive the piston to retreat together, and cannot realize the operation of automatically extracting the liquid medicine;
2. the screw rod can complete linear motion only by the aid of a limiting groove; when the sliding screw nut rotates, if the screw rod is in a suspended state, the screw rod still rotates under the action of friction force between threads, and linear motion cannot be realized. The rotary motion of the screw rod is limited through the limiting groove, and after the rotary motion of the screw rod is limited, the screw rod can realize linear motion under the common reaction force of the limiting groove and the threads, so that the medicine storage device is pushed to advance, as shown in fig. 2.
3. Is not favorable for water resistance; the relative motion between the screw rod and the screw nut is realized through thread matching. However, due to the limitation of machining precision and cost, high-precision thread machining cost is high, thread gaps are difficult to completely eliminate, and compared with polished rod bearing matching, the machining precision is low, the tightness is poor, so that the waterproofness of the polished rod bearing is relatively poor, and other auxiliary mechanisms are mostly needed to meet the requirement of high waterproofness.
4. The lead screw shakes to cause the infusion precision to decline; in the actual product, being equivalent to non-rigid single-point between the lead screw nut and fixed, under spacing groove and gravity combined action, the lead screw atress is uneven, leads to the lead screw to take place conical swing easily in the in-process that advances, has great deviation under lead screw actual stroke and the ideal straight line state, not only reduces infusion precision, and under the radial effect of propulsive force, the screw thread wearing and tearing aggravation simultaneously leads to waterproof performance and infusion precision further to deteriorate, as shown in fig. 3.
Disclosure of Invention
The invention aims to solve the technical problems of simple structure, long service life, convenient use and lower cost.
The reciprocating type infusion propulsion mechanism is realized by the following technical scheme: comprises a medicine storage device, an integrated piston and a speed reducing motor;
the integrated piston comprises a rubber soft plug, a threaded pipe and a threaded pipe central column, the rubber soft plug is fixed with the threaded pipe central column, and the rubber soft plug is tightly contacted with the inner wall of the medicine storage device; the medicine storage device and the threaded pipe are both provided with mutually matched threads, and the medicine storage device is arranged on the threaded pipe through the threads; the speed reducing motor is arranged on one side of the threaded pipe, and a motor shaft of the speed reducing motor is provided with a screw rod; the threaded pipe central column is hollow, and the rotating rod is arranged on the threaded pipe central column and is in clearance fit with the threaded pipe central column.
As the preferred technical scheme, the periphery of gear motor is provided with waterproof casing, is provided with the bearing on the waterproof casing, and gear motor's motor shaft is installed in the one end of bearing, and the rotary rod is installed in the bearing other end.
As the preferred technical scheme, the threaded pipe central column is of a polygonal hollow structure, and the shape of the rotating rod is matched with that of the threaded pipe central column.
As the preferred technical scheme, an infusion needle is installed on one side of the medicine storage device.
The invention has the beneficial effects that: the invention has the advantages of simple structure, long service life, convenient use and lower cost.
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 drawings without creative efforts.
FIG. 1 is a schematic plan view of a prior art structure;
FIG. 2 is a schematic diagram illustrating a rotation limiting and propelling principle of a screw rod in the prior art;
FIG. 3 is a schematic view of a conical swing of a screw rod under single point fixation in the prior art;
FIG. 4 is a schematic view of a reciprocating infusion propulsion arrangement of the present invention;
FIG. 5 is a first schematic illustration of the propulsion principle of the present invention;
fig. 6 is a second schematic view of the propulsion principle of the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.
In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 4-6, the reciprocating type infusion propulsion mechanism of the invention comprises a medicine storage device 1, an integrated piston 2 and a speed reducing motor 3;
the integrated piston 2 comprises a rubber soft plug 2.1, a threaded pipe 2.2 and a threaded pipe central column 2.3, the rubber soft plug 2.1 is fixed with the threaded pipe central column 2.3, and the rubber soft plug 2.1 is tightly contacted with the inner wall of the medicine storage device 1; the medicine storage device 1 and the threaded pipe 2.2 are both provided with mutually matched threads, and the medicine storage device 1 is arranged on the threaded pipe 2.2 through the threads; the speed reducing motor 3 is arranged on one side of the threaded pipe 2.2, and a screw rod 7 is arranged on a motor shaft of the speed reducing motor 3; the threaded pipe central column 2.3 is hollow, and the rotating rod 7 is arranged in the threaded pipe central column 2.3 and is in clearance fit with the threaded pipe central column; when the threaded pipe 2.2 rotates on the medicine storage device 1, the rubber soft plug 2.1 can move along the axial direction of the medicine storage device 1, and moves along with the movement of the threaded pipe 2.2, so that the operation of pushing liquid medicine or extracting liquid medicine is realized.
In this embodiment, a waterproof housing 5 is disposed on the periphery of the reduction motor 3, a bearing 6 is disposed on the waterproof housing 5, a motor shaft of the reduction motor 3 is mounted at one end of the bearing 6, and a rotating rod 7 is mounted at the other end of the bearing 6.
In the embodiment, the threaded pipe central column 2.3 is of a polygonal hollow structure, the shape of the rotary rod 7 is matched with that of the threaded pipe central column 2.3, and when the rotary rod 7 is driven by the motor to rotate, the rotary rod can drive the threaded pipe 2.2 to rotate together, so that the threaded pipe 2.2 can axially move on the medicine storage device 1; since the rotating rod 7 is loosely fitted with the screwed pipe central column 2.3, when the screwed pipe 2.2 moves axially, the screwed pipe central column 2.3 also moves axially along the rotating rod 7, so that the rotating rod 7 can only rotate without moving axially.
In this embodiment, an infusion needle 4 is installed on one side of the medicine reservoir 1.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (4)
1. A reciprocating infusion advancing mechanism, characterized in that: comprises a medicine storage device (1), an integrated piston (2) and a speed reducing motor (3);
the integral piston (2) comprises a rubber soft plug (2.1), a threaded pipe (2.2) and a threaded pipe central column (2.3), the rubber soft plug (2.1) is fixed with the threaded pipe central column (2.3), and the rubber soft plug (2.1) is tightly contacted with the inner wall of the medicine storage device (1); the medicine storage device (1) and the threaded pipe (2.2) are respectively provided with threads matched with each other, and the medicine storage device (1) is arranged on the threaded pipe (2.2) through the threads; the speed reducing motor (3) is arranged on one side of the threaded pipe (2.2), and a screw rod (7) is arranged on a motor shaft of the speed reducing motor (3); the threaded pipe central column (2.3) is hollow, and the rotating rod (7) is installed on the threaded pipe central column (2.3) and is in clearance fit with the threaded pipe central column.
2. The reciprocating infusion propulsion mechanism according to claim 1, wherein: the periphery of gear motor (3) is provided with waterproof casing (5), is provided with bearing (6) on waterproof casing (5), and the motor shaft of gear motor (3) installs in the one end of bearing (6), and rotary rod (7) are installed in the bearing (6) other end.
3. The reciprocating infusion propulsion mechanism according to claim 1, wherein: the threaded pipe central column (2.3) is of a polygonal hollow structure, and the shape of the rotating rod (7) is matched with that of the threaded pipe central column (2.3).
4. The reciprocating infusion propulsion mechanism according to claim 1, wherein: an infusion needle (4) is installed on one side of the medicine storage device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110011666.7A CN112843382A (en) | 2021-01-05 | 2021-01-05 | Reciprocating type infusion advancing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110011666.7A CN112843382A (en) | 2021-01-05 | 2021-01-05 | Reciprocating type infusion advancing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112843382A true CN112843382A (en) | 2021-05-28 |
Family
ID=76004148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110011666.7A Pending CN112843382A (en) | 2021-01-05 | 2021-01-05 | Reciprocating type infusion advancing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112843382A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19731778A1 (en) * | 1997-07-24 | 1999-02-11 | Leon Helma Christina | Motor-driven automatic injection unit for human or veterinary use |
| US20110301566A1 (en) * | 2010-06-05 | 2011-12-08 | Eckhard Schaefer | Cartridge connection method for precise delivery of liquid |
| CN210384541U (en) * | 2019-04-30 | 2020-04-24 | 西安市第一医院 | Department of neurology doctor uses autoinjector |
| CN211024511U (en) * | 2019-10-16 | 2020-07-17 | 李文鹏 | Sealing assembly of infusion pump |
| CN211611088U (en) * | 2020-01-17 | 2020-10-02 | 内江市第一人民医院 | Improved piston type analgesia pump after anesthesia operation |
| CN214911739U (en) * | 2021-01-05 | 2021-11-30 | 凯联医疗科技(上海)有限公司 | Reciprocating type infusion advancing mechanism |
-
2021
- 2021-01-05 CN CN202110011666.7A patent/CN112843382A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19731778A1 (en) * | 1997-07-24 | 1999-02-11 | Leon Helma Christina | Motor-driven automatic injection unit for human or veterinary use |
| US20110301566A1 (en) * | 2010-06-05 | 2011-12-08 | Eckhard Schaefer | Cartridge connection method for precise delivery of liquid |
| CN210384541U (en) * | 2019-04-30 | 2020-04-24 | 西安市第一医院 | Department of neurology doctor uses autoinjector |
| CN211024511U (en) * | 2019-10-16 | 2020-07-17 | 李文鹏 | Sealing assembly of infusion pump |
| CN211611088U (en) * | 2020-01-17 | 2020-10-02 | 内江市第一人民医院 | Improved piston type analgesia pump after anesthesia operation |
| CN214911739U (en) * | 2021-01-05 | 2021-11-30 | 凯联医疗科技(上海)有限公司 | Reciprocating type infusion advancing mechanism |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210528 |