CN109701109B - Infusion mechanism - Google Patents
Infusion mechanism Download PDFInfo
- Publication number
- CN109701109B CN109701109B CN201910188712.3A CN201910188712A CN109701109B CN 109701109 B CN109701109 B CN 109701109B CN 201910188712 A CN201910188712 A CN 201910188712A CN 109701109 B CN109701109 B CN 109701109B
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- CN
- China
- Prior art keywords
- infusion
- rotating piece
- shell
- driving
- peripheral surface
- 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.)
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Links
- 238000001802 infusion Methods 0.000 title claims abstract description 70
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000003814 drug Substances 0.000 claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 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 10
- 102000004877 Insulin Human genes 0.000 description 5
- 108090001061 Insulin Proteins 0.000 description 5
- 229940125396 insulin Drugs 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- -1 300 units Chemical compound 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses an infusion mechanism, which comprises a shell, an infusion assembly and a driving piece, wherein the shell is provided with a first cavity; the infusion assembly comprises a sliding rod, a transmission gear, a rotating piece, a fixing seat, a fixing sleeve, an infusion tube, a piston and a push knife, wherein the infusion end of the infusion tube penetrates through the fixing sleeve and the shell to be connected with an external infusion piece. By adopting the infusion mechanism with the structural design, the rotating piece slides back and forth along the sliding rod while rotating under the driving action of the driving piece, so that the piston is pushed to feed while cutting the infusion tube through the push knife fastened on the outer surface of the rotating piece, and then the liquid medicine in the infusion tube is accurately infused.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an infusion mechanism.
Background
In the medical field, a typical representative of portable high-precision infusion of human medical fluids is an insulin pump, which is used to treat diabetics. Insulin is measured in "units" and divided into 100 units per cc (or mL), assuming a standard concentration of U-100, in this manner one unit corresponds to 10. Mu.L. Typically, each reservoir stores 3ml of insulin, i.e. 300 units, resembling a short, thick, small-size syringe in appearance, with a reservoir piston total stroke of about 3cm and an inner diameter of about 12mm. Assuming an injection rate of 1 unit/hour, the insulin pump will slowly push the piston forward 0.1mm at a constant speed within 1 hour, and since the piston forward distance is too short, the constant speed is required to be maintained, and this requirement causes the electromechanical transmission part of the insulin pump to be extremely precise and complex, and the cost is high.
Disclosure of Invention
The invention aims to provide an infusion mechanism which is simple in structure, high in infusion precision and low in cost.
To achieve the purpose, the invention adopts the following technical scheme:
an infusion mechanism comprising a housing, an infusion assembly pivotally connected within a cavity of the housing, and a drive member for driving the infusion assembly to operate; the infusion assembly comprises a sliding rod pivoted between two opposite side walls of the shell, a transmission gear coaxially meshed with the sliding rod, a rotating piece sleeved on the transmission gear and coaxially meshed with the transmission gear, a fixing seat sleeved on one end of the rotating piece and in threaded connection with the rotating piece, a fixing sleeve sleeved on the other end of the rotating piece and matched with the rotating piece, an infusion tube buried in a thread groove of the inner side wall of the fixing sleeve, a piston arranged in a port of the infusion tube far away from the liquid outlet end, and a push knife buried on the peripheral surface of the rotating piece and used for driving the piston to push liquid medicine to feed.
The tool bit part of the push broach extends out of the thread groove and is matched with one end face, far away from the liquid medicine, of the piston.
The inner peripheral surface of the fixing seat is concavely provided with an inner thread, and the inner thread is matched with an outer thread convexly arranged on the outer peripheral surface of the rotating piece.
The external thread screwing length of the outer peripheral surface of the rotating piece is smaller than the length of the rotating piece.
The side wall of the fixing sleeve is provided with a first guide hole for leading out the infusion tube.
The side wall of the shell is provided with a second guide hole, and the infusion end of the infusion tube sequentially penetrates through the first guide hole and the second guide hole.
Wherein, the bushing is buried in each of the first guide hole and the second guide hole.
The shaft section of the transmission gear is in a T-shaped arrangement, gear teeth on the first outer peripheral surface of the transmission gear are meshed with gear teeth circumferentially and uniformly distributed on the inner peripheral surface of the port of the rotating piece, and gear teeth on the second outer peripheral surface of the transmission gear are meshed with the driving gear of the driving piece.
The fixing seat and the outer peripheral surface of the fixing sleeve are respectively fastened with the mounting position.
Wherein, the fixing base with the fixed cover coaxial setting just external diameter equals.
The invention has the beneficial effects that: the invention provides an infusion mechanism, which comprises a shell, an infusion assembly pivoted in a cavity of the shell, and a driving piece for driving the infusion assembly to work, wherein the infusion assembly is pivoted in the cavity of the shell; the infusion assembly comprises a sliding rod pivoted between two opposite side walls of the shell, a transmission gear coaxially meshed with the sliding rod, a rotating piece sleeved on the transmission gear and coaxially meshed with the transmission gear, a fixing seat sleeved on one end of the rotating piece and in threaded connection with the rotating piece, a fixing sleeve sleeved on the other end of the rotating piece and matched with the rotating piece, an infusion tube buried in a thread groove of the inner side wall of the fixing sleeve, a piston arranged in a port of the infusion tube far away from the liquid outlet end, and a push knife buried on the peripheral surface of the rotating piece and used for driving the piston to push liquid medicine to feed. By adopting the infusion mechanism with the structural design, the rotating piece slides back and forth along the sliding rod while rotating under the driving action of the driving piece, so that the piston is pushed to feed while cutting the infusion tube through the push knife fastened on the outer surface of the rotating piece, and then the liquid medicine in the infusion tube is accurately infused.
Drawings
Fig. 1 is an exploded view of an infusion mechanism of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a cross-sectional view of A-A in fig. 2.
Fig. 4 is an exploded view of the infusion assembly of fig. 1.
Fig. 5 is an isometric view of fig. 1.
Fig. 6 is a partial enlarged view at B in fig. 4.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
As shown in fig. 1 to 6, the present embodiment provides an infusion mechanism, which includes a housing formed by combining a lower housing 11 and an upper cover 12, an infusion assembly 2 pivotally connected to a cavity of the housing, and a driving member 3 for driving the infusion assembly 2 to operate;
specifically, in this embodiment, the infusion assembly 2 includes a sliding rod 21 pivoted between opposite side walls of the housing, a transmission gear 22 slidably sleeved on the sliding rod 21 and coaxially engaged with the sliding rod 21, a rotating member 23 sleeved on the transmission gear 22 and coaxially engaged with the transmission gear 22, a fixing seat 24 sleeved on one end of the rotating member 23 and in threaded connection with the rotating member 23, a fixing sleeve 25 sleeved on the other end of the rotating member 23 and matched with the rotating member 23, a transfusion tube 26 embedded in a thread groove in an inner side wall of the fixing sleeve 25, a piston 27 arranged in a port of the transfusion tube 26 far away from the liquid outlet end, and a push knife 28 embedded in an outer peripheral surface of the rotating member 23 for driving the piston 27 to push the liquid medicine to feed, wherein a transfusion end of the transfusion tube 26 penetrates through the fixing sleeve 25 and the housing and is connected with an external transfusion member. In this embodiment, the driving member 3 may be configured as a motor, and drives the transmission gear 22 to rotate through a driving gear on a spindle of the motor, and then drives the rotating member 23 to rotate relative to the fixed seat 24, and the fixed seat 24 is screwed with the rotating member 23, so that the rotating member 23 rotates and slides along the sliding rod 21.
In this embodiment, in order to facilitate the rotation of the transmission gear 22, the transmission gear can slide along the sliding rod 21, the outer circumferential surface of the sliding rod 21 is circumferentially provided with gear teeth along the length direction, and two ends of the sliding rod 21 are rotationally connected with bearing sleeves embedded in two opposite side walls of the housing.
Specifically, in this embodiment, the inner circumferential surface of the fixing seat 24 is concavely provided with an internal thread, and the internal thread is matched with an external thread protruding from the outer circumferential surface of the rotating member 23.
In addition, in order to enable axial movement between the rotary member 23 and the fixed seat 24, the external screw thread screwing length of the outer peripheral surface of the rotary member 23 is smaller than the length of the rotary member 23.
Further, in order to facilitate the connection of the infusion tube 26 leading out the casing and the external infusion part, in this embodiment, the side wall of the fixing sleeve 25 is provided with a first guide hole for guiding out the infusion tube 26, the side wall of the casing is provided with a second guide hole, the infusion end of the infusion tube 26 sequentially penetrates through the first guide hole and the second guide hole, and the first guide hole and the second guide hole are internally embedded with bushings, so that abrasion to the infusion tube 26 is reduced.
Specifically, in this embodiment, as shown in fig. 3, the shaft section of the driving gear 22 is in a T-shaped arrangement, the gear teeth on the first outer peripheral surface of the driving gear 22 are meshed with the gear teeth circumferentially distributed on the inner peripheral surface of the port of the rotating member 23, the gear teeth on the second outer peripheral surface of the driving gear 22 are meshed with the driving gear of the driving member 3, in addition, in order to enable the driving gear 22 to be slidably matched with the sliding rod 21, a through hole is arranged in the middle of the driving gear 22 along the axial direction, and the gear teeth meshed with the sliding rod 21 are arranged on the inner peripheral surface of the through hole.
In this embodiment, in order to facilitate the installation and fixation of the fixing base 24 and the fixing sleeve 25, as shown in fig. 3, an installation position 13 is provided in the middle of the housing in a penetrating manner, and the installation position 13 is in a cylindrical shape, so that the fixing base 24 and the fixing sleeve 25 with equal outer diameters can be fastened in the installation position.
By adopting the infusion mechanism with the structural design, when the rotary piece 23 rotates conveniently, the pushing knife 28 cuts the infusion tube 26 at one end of the piston 27 far away from the liquid medicine, and then pushes the piston 27 to feed, and the knife head of the pushing knife 28 extends out of the thread groove and is fastened with one end face of the piston 27 far away from the liquid medicine.
By adopting the infusion mechanism designed in the mode, the infusion tube 26 is buried in the thread groove on the inner side wall of the fixed sleeve 25, so that the length of the infusion tube 26 is greatly extended, and the piston 27 is pushed to feed by the push knife 28, so that the infusion of liquid medicine is completed.
The technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (6)
1. An infusion mechanism, characterized by: comprises a shell, an infusion assembly pivoted in a cavity of the shell and a driving piece for driving the infusion assembly to work; the infusion assembly comprises a sliding rod pivoted between two opposite side walls of the shell, a transmission gear sleeved on the sliding rod and coaxially meshed with the sliding rod, a rotating piece sleeved on the transmission gear and coaxially meshed with the transmission gear, a fixed seat sleeved on one end of the rotating piece and in threaded connection with the rotating piece, a fixed sleeve sleeved on the other end of the rotating piece and matched with the rotating piece, an infusion tube embedded in a thread groove on the inner side wall of the fixed sleeve, a piston arranged in a port of the infusion tube far away from the liquid outlet end, and a push knife embedded in the peripheral surface of the rotating piece and used for driving the piston to push liquid medicine to feed, wherein the infusion end of the infusion tube penetrates through the fixed sleeve and the shell to be connected with an external infusion piece; the inner peripheral surface of the fixed seat is concavely provided with an internal thread, and the internal thread is matched with an external thread convexly arranged on the outer peripheral surface of the rotating piece; the external thread screwing length of the outer peripheral surface of the rotating piece is smaller than the length of the rotating piece;
the driving piece is a motor, and a driving gear on a motor spindle drives the transmission gear to rotate so as to drive the rotating piece and the fixing seat to rotate relatively;
the tool bit part of the push broach extends out of the thread groove and is matched with one end face of the piston, which is far away from the liquid medicine;
the shell is characterized in that a mounting position is arranged in a cavity of the shell, and the outer peripheral surfaces of the fixing seat and the fixing sleeve are respectively fastened with the mounting position.
2. An infusion mechanism according to claim 1, wherein: the side wall of the fixed sleeve is provided with a first guide hole for leading out the infusion tube.
3. An infusion mechanism according to claim 2, wherein: the side wall of the shell is provided with a second guide hole, and the infusion end of the infusion tube sequentially penetrates through the first guide hole and the second guide hole.
4. An infusion mechanism according to claim 3, wherein: and the first guide hole and the second guide hole are embedded with bushings.
5. An infusion mechanism according to claim 1, wherein: the shaft section of the transmission gear is in a T-shaped arrangement, gear teeth on the first outer peripheral surface of the transmission gear are meshed with gear teeth circumferentially distributed on the inner peripheral surface of the port of the rotating member, and gear teeth on the second outer peripheral surface of the transmission gear are meshed with the driving gear of the driving member.
6. An infusion mechanism according to claim 1, wherein: the fixed seat and the fixed sleeve are coaxially arranged and have equal outer diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910188712.3A CN109701109B (en) | 2019-03-13 | 2019-03-13 | Infusion mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910188712.3A CN109701109B (en) | 2019-03-13 | 2019-03-13 | Infusion mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109701109A CN109701109A (en) | 2019-05-03 |
| CN109701109B true CN109701109B (en) | 2024-01-30 |
Family
ID=66265862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910188712.3A Active CN109701109B (en) | 2019-03-13 | 2019-03-13 | Infusion mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109701109B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6248093B1 (en) * | 1998-10-29 | 2001-06-19 | Minimed Inc. | Compact pump drive system |
| KR20040084214A (en) * | 2003-03-27 | 2004-10-06 | 주식회사 엔터기술 | insulin pump |
| CA2658857A1 (en) * | 2006-08-23 | 2008-02-28 | Medtronic Minimed, Inc. | Infusion medium delivery device and method with drive device for driving plunger in reservoir |
| WO2010115818A1 (en) * | 2009-03-31 | 2010-10-14 | Sanofi-Aventis Deutschland Gmbh | Drug delivery device |
| CN201631814U (en) * | 2010-04-07 | 2010-11-17 | 邓源基 | Disposable insulin injection pen with adjustable dose |
| CN202069940U (en) * | 2011-04-12 | 2011-12-14 | 魏鸿雁 | Novel insulin pump |
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| CN106267459A (en) * | 2015-05-25 | 2017-01-04 | 美敦力公司 | Fluid infusion device and manufacture method thereof including mechanical actuation means |
| JP2017104164A (en) * | 2015-12-07 | 2017-06-15 | 日本電産コパル電子株式会社 | Infusion pump |
| WO2017109522A1 (en) * | 2015-12-21 | 2017-06-29 | Ричард ПУШКАШ | Pre-filled pressure infusion set |
| WO2017108686A1 (en) * | 2015-12-21 | 2017-06-29 | Fresenius Vial Sas | Infusion device having a pusher device |
| CN108273153A (en) * | 2018-03-14 | 2018-07-13 | 谭永宏 | A kind of type self-destroyed precision transfusion device |
| CN109224187A (en) * | 2018-10-15 | 2019-01-18 | 深圳中科生物医疗电子有限公司 | A kind of infusion driving device |
| CN209848006U (en) * | 2019-03-13 | 2019-12-27 | 深圳中科生物医疗电子有限公司 | Infusion mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK2453972T3 (en) * | 2009-07-16 | 2014-02-03 | Medingo Ltd | DEVICE FOR EXACT INFUSION OF FLUIDS |
-
2019
- 2019-03-13 CN CN201910188712.3A patent/CN109701109B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6248093B1 (en) * | 1998-10-29 | 2001-06-19 | Minimed Inc. | Compact pump drive system |
| KR20040084214A (en) * | 2003-03-27 | 2004-10-06 | 주식회사 엔터기술 | insulin pump |
| CA2658857A1 (en) * | 2006-08-23 | 2008-02-28 | Medtronic Minimed, Inc. | Infusion medium delivery device and method with drive device for driving plunger in reservoir |
| WO2010115818A1 (en) * | 2009-03-31 | 2010-10-14 | Sanofi-Aventis Deutschland Gmbh | Drug delivery device |
| CN201631814U (en) * | 2010-04-07 | 2010-11-17 | 邓源基 | Disposable insulin injection pen with adjustable dose |
| CN202069940U (en) * | 2011-04-12 | 2011-12-14 | 魏鸿雁 | Novel insulin pump |
| WO2015181194A1 (en) * | 2014-05-28 | 2015-12-03 | Sanofi-Aventis Deutschland Gmbh | Drug delivery device |
| CN105311714A (en) * | 2014-06-26 | 2016-02-10 | 群康生技股份有限公司 | Spiral guiding mechanism of injector |
| CN106267459A (en) * | 2015-05-25 | 2017-01-04 | 美敦力公司 | Fluid infusion device and manufacture method thereof including mechanical actuation means |
| JP2017104164A (en) * | 2015-12-07 | 2017-06-15 | 日本電産コパル電子株式会社 | Infusion pump |
| WO2017108686A1 (en) * | 2015-12-21 | 2017-06-29 | Fresenius Vial Sas | Infusion device having a pusher device |
| WO2017109522A1 (en) * | 2015-12-21 | 2017-06-29 | Ричард ПУШКАШ | Pre-filled pressure infusion set |
| CN106039475A (en) * | 2016-05-18 | 2016-10-26 | 苏州鹏烨医疗科技有限公司 | Injection pen |
| CN108273153A (en) * | 2018-03-14 | 2018-07-13 | 谭永宏 | A kind of type self-destroyed precision transfusion device |
| CN109224187A (en) * | 2018-10-15 | 2019-01-18 | 深圳中科生物医疗电子有限公司 | A kind of infusion driving device |
| CN209848006U (en) * | 2019-03-13 | 2019-12-27 | 深圳中科生物医疗电子有限公司 | Infusion mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109701109A (en) | 2019-05-03 |
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