CN105561446A - Liquid injector - Google Patents

Liquid injector Download PDF

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Publication number
CN105561446A
CN105561446A CN201610014500.XA CN201610014500A CN105561446A CN 105561446 A CN105561446 A CN 105561446A CN 201610014500 A CN201610014500 A CN 201610014500A CN 105561446 A CN105561446 A CN 105561446A
Authority
CN
China
Prior art keywords
screw rod
main body
piston
syringe
fluid injector
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
Application number
CN201610014500.XA
Other languages
Chinese (zh)
Inventor
王中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DONGGUAN LIZHONG NEW MATERIAL TECHNOLOGY Co Ltd
Original Assignee
DONGGUAN LIZHONG NEW MATERIAL TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DONGGUAN LIZHONG NEW MATERIAL TECHNOLOGY Co Ltd filed Critical DONGGUAN LIZHONG NEW MATERIAL TECHNOLOGY Co Ltd
Priority to CN201610014500.XA priority Critical patent/CN105561446A/en
Publication of CN105561446A publication Critical patent/CN105561446A/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31525—Dosing
    • A61M5/31528—Dosing by means of rotational movements, e.g. screw-thread mechanisms

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 liquid injector and belongs to the field of medical parts. The liquid injector comprises a needle cylinder main body, a screw rod and a piston, wherein a liquid outlet is formed in the lower end of the needle cylinder main body; the screw rod axially penetrates the needle cylinder main body to rotate in the needle cylinder main body; the piston is arranged in the needle cylinder main body and is in seal contact with the inner wall of the needle cylinder main body; and the screw rod is in threaded connection with the piston, so that the piston moves along a screw thread of the screw rod when the screw rod rotates to continuously supply liquid. The liquid injector is provided with the built-in screw rod and is small in occupied space, convenient to use and especially suitable for a wearable insulin pump.

Description

A kind of fluid injector
Technical field
The present invention relates to medical instrument field, particularly relate to a kind of fluid injector.
Background technology
Some special occasions need the supply of lasting, controlled, the accurate and atomic a small amount of of medicine, as insulin, anesthetis, experiment reagent etc.Often thisly continue controlled accurate medicinal liquid supply, need accurate mechanical part, automatically controlled part, fluid injector jointly integrated come.Existing integrated chemicals feeder product has many, and as insulin pump, anesthesia pump, medical Micropump, experimental analysis micro-sampling pump, micro-example move liquid pump etc.These devices all need fluid injector and coordinate, and store medicinal liquid.
But existing fluid injector is due to structural limitations, with machinery, electric control part divide coordinate form integrated chemicals feeder time, bring difficulty to the miniaturization of device, be especially not suitable for wearable medical treatment device, as the application of insulin pump.
Summary of the invention
For solving the above problems, the invention provides a kind of fluid injector, built-in screw rod, taking up room little, easy to use, be specially adapted to the application of wearable insulin pump.
The technical solution used in the present invention is: a kind of fluid injector, comprises syringe main body, screw rod and piston; Syringe main body lower end is provided with liquid outlet; Screw axial is located in syringe main body, with rotation in syringe main body; Piston to be located in syringe main body and to seal with syringe main body inner wall and contacts, and screw rod and piston are threaded connection, and can move with lasting feed flow with the piston when bolt rotary along screw flight.
In technique scheme, between screw rod and piston, be provided with dynamic seal, realize the movable sealing between screw rod and piston.
In technique scheme, syringe main body comprises syringe shell and end cap; End cap is located at syringe shell upper end.
In technique scheme, screw rod upper end is provided with footstalk, and end cap is provided with through hole, and the footstalk of screw rod passes the through hole of end cap, and footstalk and accessory drive equipment coordinate the rotation realizing screw rod.
In technique scheme, screw rod lower end is protruding with convex rotating shaft, is arranged with the shaft hole corresponding with convex rotating shaft in bottom syringe shell, and convex rotating shaft embeds shaft hole, to realize the centralized positioning of screw rod and smooth and easy rotation; Also can be that screw rod lower end indent has shaft hole, raise up and be provided with the convex rotating shaft corresponding with shaft hole bottom syringe shell, convex rotating shaft embeds shaft hole, to realize pitch location and smooth and easy rotation.
The invention has the beneficial effects as follows: this kind of fluid injector, built-in screw rod, when bolt rotary, piston can move along screw flight, directly in the space of syringe main body, realize piston to move, take up room little, coordinate easy for installation with other mechanical part, the miniaturization of chemicals feeder can be realized, be specially adapted to wearable medical treatment device, as insulin pump.
Accompanying drawing explanation
Fig. 1 is a kind of fluid injector sectional view of the embodiment of the present invention one;
Fig. 2 is a kind of fluid injector sectional view of the embodiment of the present invention two.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
embodiment one:
Fig. 1 show schematically show a kind of fluid injector according to one embodiment of the present invention.
This kind of fluid injector, comprises syringe main body, screw rod 2 and piston 3.
Syringe main body comprises syringe shell 11 and end cap 12; End cap 12 is located at syringe shell 11 upper end.Liquid outlet 4 is provided with bottom the syringe shell 11 of syringe main body; Screw rod 2 is axially located in the syringe shell 11 of syringe main body, screw rod 2 position at syringe shell 11 home position, with rotation the syringe shell 11 of syringe main body in; The cross section of syringe shell 11 and piston 3 can be circular, oval, square or other shape, contact with syringe shell 11 inner wall sealing of syringe main body in the syringe shell 11 that piston 3 is located at syringe main body, screw rod 2 and piston 3 are threaded connection, screw rod 2 gathers and rotates screw thread, can move with lasting feed flow with the piston 3 when screw rod 2 rotates along the screw thread of screw rod 2.
Above-mentioned, be provided with dynamic seal 5 between screw rod 2 and piston 3, dynamic seal 5 is rubber seal, and dynamic seal 5 is positioned among piston 3, realizes the movable sealing between screw rod 2 and piston 3.
Above-mentioned, screw rod 2 upper end is provided with footstalk 21, footstalk 21 and screw rod 2 one-body molded, end cap 12 home position is provided with through hole 13, and the footstalk 21 of screw rod 2 is through the through hole 13 of end cap 12, and footstalk 21 and accessory drive equipment coordinate the rotation realizing screw rod 2; The cross section of footstalk 21 can be hexagon, flat or other shape; Screw rod 2 is provided with boss 22, boss 22 and screw rod 2 one-body molded, boss 22 and end cap 12 contact, below to be limited in syringe shell 11 by screw rod 2.
Above-mentioned, screw rod 2 lower end is protruding with convex rotating shaft 6, convex rotating shaft 6 and screw rod 2 one-body molded, in home position, the shaft hole 7 corresponding with convex rotating shaft 6 is arranged with bottom syringe shell 11, convex rotating shaft 6 embeds shaft hole 7, convex rotating shaft 6 and shaft hole 7 are matched in clearance, to realize screw rod 2 centralized positioning and smooth and easy rotation.
embodiment two:
Fig. 2 show schematically show the another kind of fluid injector according to one embodiment of the present invention.
This kind of fluid injector, comprises syringe main body, screw rod 2 and piston 3.
Syringe main body comprises syringe shell 11 and end cap 12; End cap 12 is located at syringe shell 11 upper end.Liquid outlet 4 is provided with bottom the syringe shell 11 of syringe main body; Screw rod 2 is axially located in the syringe shell 11 of syringe main body, screw rod 2 position at syringe shell 11 home position, with rotation the syringe shell 11 of syringe main body in; The cross section of syringe shell 11 and piston 3 can be circular, oval, square or other shape, contact with syringe shell 11 inner wall sealing of syringe main body in the syringe shell 11 that piston 3 is located at syringe main body, screw rod 2 and piston 3 are threaded connection, screw rod 2 gathers and rotates screw thread, can move with lasting feed flow with the piston 3 when screw rod 2 rotates along the screw thread of screw rod 2.
Above-mentioned, be provided with dynamic seal 5 between screw rod 2 and piston 3, dynamic seal 5 is rubber seal, and dynamic seal 5 is positioned among piston 3, realizes the movable sealing between screw rod 2 and piston 3.
Above-mentioned, screw rod 2 upper end is provided with footstalk 21, footstalk 21 and screw rod 2 one-body molded, end cap 12 home position is provided with through hole 13, and the footstalk 21 of screw rod 2 is through the through hole 13 of end cap 12, and footstalk 21 and accessory drive equipment coordinate the rotation realizing screw rod 2; The cross section of footstalk 21 can be hexagon, flat or other shape; Screw rod 2 is provided with boss 22, boss 22 and screw rod 2 one-body molded, boss 22 and end cap 12 contact, below to be limited in syringe shell 11 by screw rod 2.
Above-mentioned, screw rod 2 lower end indent has shaft hole 7, and be provided with the convex rotating shaft 6 corresponding with shaft hole 7 home position is projecting inward bottom syringe shell 11, convex rotating shaft 6 embeds shaft hole 7, convex rotating shaft 6 and shaft hole 7 are matched in clearance, to realize screw rod 2 centralized positioning and smooth and easy rotation.
When using a kind of fluid injector in above-described embodiment one and embodiment two, screw rod 2 is driven to rotate by rotating footstalk 21, coordinate with screw rod 2 owing to piston 3 there being screw thread, again because piston 3 contacts with syringe shell 11 inner wall sealing, enough frictional resistance can be produced, cause piston 3 can not rotate along with the rotation of screw rod 2, again because screw rod 2 can not be moved up and down by syringe shell 11 and end cap 12 restriction, result is exactly the rotation along with screw rod 2, piston 3 will be pushed down, and achieve the output of medicinal liquid.
Above embodiment is merely illustrative and not limiting to the invention, therefore all equivalences done according to the method described in patent claim of the present invention change or modify, and are included in patent claim of the present invention.

Claims (6)

1. a fluid injector, comprises syringe main body, screw rod and piston; Syringe main body lower end is provided with liquid outlet; It is characterized in that, screw axial is located in syringe main body, to rotate in syringe main body; Piston to be located in syringe main body and to seal with syringe main body inner wall and contacts, and screw rod and piston are threaded connection, and can move with lasting feed flow with the piston when bolt rotary along screw flight.
2. a kind of fluid injector according to claim 1, is characterized in that: be provided with dynamic seal between screw rod and piston.
3. a kind of fluid injector according to claim 1, is characterized in that: syringe main body comprises syringe shell and end cap; End cap is located at syringe shell upper end.
4. a kind of fluid injector according to claim 3, is characterized in that: screw rod upper end is provided with footstalk, and end cap is provided with through hole, and the footstalk of screw rod passes the through hole of end cap.
5. a kind of fluid injector according to claim 3, is characterized in that: screw rod lower end is protruding with convex rotating shaft, is arranged with the shaft hole corresponding with convex rotating shaft in bottom syringe shell, and convex rotating shaft embeds shaft hole, to realize pitch location and smooth and easy rotation.
6. a kind of fluid injector according to claim 3, is characterized in that: screw rod lower end indent has shaft hole, raises up and be provided with the convex rotating shaft corresponding with shaft hole bottom syringe shell, and convex rotating shaft embeds shaft hole, to realize pitch location and smooth and easy rotation.
CN201610014500.XA 2016-01-11 2016-01-11 Liquid injector Pending CN105561446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610014500.XA CN105561446A (en) 2016-01-11 2016-01-11 Liquid injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610014500.XA CN105561446A (en) 2016-01-11 2016-01-11 Liquid injector

Publications (1)

Publication Number Publication Date
CN105561446A true CN105561446A (en) 2016-05-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

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CN (1) CN105561446A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106038053A (en) * 2016-07-05 2016-10-26 颜繁诚 Retrobulbar drug injection device
CN107137805A (en) * 2017-06-19 2017-09-08 钱月珍 quantitative needleless injection pen
CN108324425A (en) * 2018-02-09 2018-07-27 烟台市帅恒机械科技有限公司 A kind of medical duct cleaning device of one hand
CN108553747A (en) * 2018-05-10 2018-09-21 江南大学附属医院 A kind of department of stomatology feeding device
WO2019014895A1 (en) * 2017-07-20 2019-01-24 东莞市立中新材料科技有限公司 Precise linkage structure and micro liquid injector using same
CN111760130A (en) * 2020-07-31 2020-10-13 安静 Quantitative anesthetic injector
CN111760131A (en) * 2020-07-31 2020-10-13 安静 Syringe convenient to control anesthetic dose
CN112826541A (en) * 2021-01-13 2021-05-25 青岛大学附属医院 Endocrine liquid extraction device for clinical internal medicine
WO2021123333A1 (en) * 2019-12-20 2021-06-24 Kevin Maguire A dispensing device

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2041183U (en) * 1988-11-28 1989-07-19 王世麒 Portable automatic injector
CN2486720Y (en) * 2001-08-03 2002-04-17 亿丰综合工业股份有限公司 Power saving winding device for curtain pull rope
CN1451459A (en) * 2002-04-17 2003-10-29 有限会社龙头研究所 Component set for assembling three-D creation and device for mfg. said component for assembling
CN101001551A (en) * 2004-08-09 2007-07-18 雅芳产品公司 Device for storing and dispensing cosmetic compositions
CN201453303U (en) * 2009-08-20 2010-05-12 赵菁 Spiral self-locking syringe
CN103143078A (en) * 2013-02-04 2013-06-12 深圳玉升医疗科技有限公司 Transmission device of injection pump
CN203461637U (en) * 2013-09-09 2014-03-05 富阳市天顺通信设备有限公司 Winding device for optical fiber patch cords
CN104220117A (en) * 2012-02-10 2014-12-17 海斯迈有限责任公司 Injection device
CN104338210A (en) * 2013-07-30 2015-02-11 广东东阳光药业有限公司 Injection device
CN104689462A (en) * 2015-03-12 2015-06-10 侯强 Burn drug applicator
CN104997633A (en) * 2015-07-06 2015-10-28 中国人民解放军第三军医大学第二附属医院 Liquid mixing device for automated dispensing

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2041183U (en) * 1988-11-28 1989-07-19 王世麒 Portable automatic injector
CN2486720Y (en) * 2001-08-03 2002-04-17 亿丰综合工业股份有限公司 Power saving winding device for curtain pull rope
CN1451459A (en) * 2002-04-17 2003-10-29 有限会社龙头研究所 Component set for assembling three-D creation and device for mfg. said component for assembling
CN101001551A (en) * 2004-08-09 2007-07-18 雅芳产品公司 Device for storing and dispensing cosmetic compositions
CN201453303U (en) * 2009-08-20 2010-05-12 赵菁 Spiral self-locking syringe
CN104220117A (en) * 2012-02-10 2014-12-17 海斯迈有限责任公司 Injection device
CN103143078A (en) * 2013-02-04 2013-06-12 深圳玉升医疗科技有限公司 Transmission device of injection pump
CN104338210A (en) * 2013-07-30 2015-02-11 广东东阳光药业有限公司 Injection device
CN203461637U (en) * 2013-09-09 2014-03-05 富阳市天顺通信设备有限公司 Winding device for optical fiber patch cords
CN104689462A (en) * 2015-03-12 2015-06-10 侯强 Burn drug applicator
CN104997633A (en) * 2015-07-06 2015-10-28 中国人民解放军第三军医大学第二附属医院 Liquid mixing device for automated dispensing

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106038053A (en) * 2016-07-05 2016-10-26 颜繁诚 Retrobulbar drug injection device
CN106038053B (en) * 2016-07-05 2018-11-20 颜繁诚 Medicine-filling device after eyeball
CN107137805A (en) * 2017-06-19 2017-09-08 钱月珍 quantitative needleless injection pen
WO2019014895A1 (en) * 2017-07-20 2019-01-24 东莞市立中新材料科技有限公司 Precise linkage structure and micro liquid injector using same
CN109451730A (en) * 2017-07-20 2019-03-08 东莞市立中新材料科技有限公司 A kind of precision serial verb construction and the micro liquid syringe using the structure
CN108324425B (en) * 2018-02-09 2020-05-12 杭州科锐特医疗设备有限公司 Medical auditory canal cleaning device for single hand
CN108324425A (en) * 2018-02-09 2018-07-27 烟台市帅恒机械科技有限公司 A kind of medical duct cleaning device of one hand
CN108553747A (en) * 2018-05-10 2018-09-21 江南大学附属医院 A kind of department of stomatology feeding device
WO2021123333A1 (en) * 2019-12-20 2021-06-24 Kevin Maguire A dispensing device
GB2590494A (en) * 2019-12-20 2021-06-30 Maguire Kevin A dispensing device
CN111760130A (en) * 2020-07-31 2020-10-13 安静 Quantitative anesthetic injector
CN111760131A (en) * 2020-07-31 2020-10-13 安静 Syringe convenient to control anesthetic dose
CN111760131B (en) * 2020-07-31 2022-09-16 安静 Syringe for controlling anesthetic dosage
CN112826541A (en) * 2021-01-13 2021-05-25 青岛大学附属医院 Endocrine liquid extraction device for clinical internal medicine

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Application publication date: 20160511

RJ01 Rejection of invention patent application after publication