CN110404141A - A kind of microinjection apparatus of full-automation - Google Patents

A kind of microinjection apparatus of full-automation Download PDF

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Publication number
CN110404141A
CN110404141A CN201910705144.XA CN201910705144A CN110404141A CN 110404141 A CN110404141 A CN 110404141A CN 201910705144 A CN201910705144 A CN 201910705144A CN 110404141 A CN110404141 A CN 110404141A
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CN
China
Prior art keywords
injection
needle
syringe
needle head
head replacing
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CN201910705144.XA
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Chinese (zh)
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CN110404141B (en
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田忠秋
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    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • 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
    • A61M5/31531—Microsyringes, e.g. having piston bore diameter close or equal to needle shaft diameter
    • 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
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31545—Setting modes for dosing
    • A61M5/31546—Electrically operated dose setting, e.g. input via touch screen or plus/minus buttons
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
    • 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
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • 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
    • A61M2005/3114—Filling or refilling

Abstract

A kind of microinjection apparatus of full-automation, needle head replacing mechanism are symmetrically equipped with n injection needle with sun axis center；Needle head replacing mechanism switches between the second motion state positioned at the next the first motion state set and positioned at upper position, and the first motion state: needle head replacing mechanism turns over replacement angle α；Second motion state: the needle head replacing mechanism idle running；Micro-injection mechanism, the micro-injection mechanism is drivingly connected syringe and needle head replacing mechanism simultaneously, in upper position, driving needle head replacing mechanism completes the second motion state while the micro-injection mechanism can drive injection ram to be displaced downwardly to lower limit position by upper limit position；In lower position, driving needle head replacing mechanism completes the first motion state while the micro-injection mechanism can drive injection ram to be moved up by lower limit position to upper limit position.

Description

A kind of microinjection apparatus of full-automation
Technical field
The present invention relates to the technical fields of micro-injection, and in particular to a kind of microinjection apparatus of full-automation.
Background technique
Micro-injection is small with its injection volume, injection precision is high, injection volume is adjustable, patient is easy to the advantages that absorbing, in sugar Urine is sick, gynemetrics is clinical, is used widely in ophthalmology disease treatment, is also commonly used for the ward ICU.
Voluntary personnel in ICU section when carrying out micro injecting liquid drug, be often required to medical fluid carry out it is accurate, micro, uniform, Lasting injection, but existing injecting method is voluntarily injected by hand by medical worker, due to different medical worker from Body technology and experience are variant, and different influences can be caused to injection result, aggravates the work of medical worker significantly, it cannot be guaranteed that It is uniform when injection, if medical worker makes mistakes, secondary injury can be caused if things go on like this to increase medical matters to patient body The work load of personnel.
In terms for the treatment of diabetes, have it is following of both demand: 1. usually continuous micro-administration；2. big agent before meals Amount administration.The patient of every insulin injection uses disposable syringe tool 2~3 times daily, and 1 month discarded using 60~90 Syringe needle.Even with rear in diabetes medicament injection process, syringe needle can bring human body cell in pen core into, infect Property cell may return in syringe needle, it is also possible to cause needle to stab transmitted virus by both ends syringe needle.Needle, which stabs risk, can also prolong Downstream staff is extended to, such as waste handling person, cleanup crew, burns personnel and the public.
The prior art seldom comprehensively considers, typically micro syringe.Such as a kind of ICU section of Xiangya Hospital, Central-South China Univ. Micro-injection pump installation (CN109675142A, 20190426) cannot be guaranteed the essence of injecting liquid drug amount to solve conventional injection True technical problem, driving stepper motor 18 rotate, and stepper motor 18 drives rack 38 to rotate, and engages connection with rack 38 Toothed disc 37 rotate with it and lead screw 33 driven to rotate, fixed half-nut 32 is under the rotation of lead screw 33 on U-shaped sliding block 34 Axis direction along lead screw moves in parallel, and U-shaped sliding block 34 is horizontal on guide rod 30 to be slided and round buss 27 is pulled to shrink, and pushes and pulls seat 13 push the injection handle of syringe 15 under the pulling of round buss 27, to complete the continuous micro injection of syringe 15.Only It solves the problems, such as micro-injection, but and does not solve the problem of frequently replacing syringe needle.
Therefore, a kind of microinjection apparatus that can more renew the old syringe needle of syringe needle, automatic protection, automatic injection automatically is designed It is industry urgent need to solve the problem.
Summary of the invention
For above-mentioned defect existing in the prior art, the purpose of the present invention is to provide a kind of micro notes of full-automation Injection device realizes automatic injection, while can more renew syringe needle, the old syringe needle of protection automatically, fully achieves the automatic of micro-injection Change.
The object of the present invention is achieved like this, a kind of microinjection apparatus of full-automation, including syringe, syringe Including syringe and injection ram, injection ram in syringe between upper limit position and lower limit position watertight feud sliding match It closes, including
Needle head replacing mechanism, needle head replacing mechanism are symmetrically equipped with n injection needle with sun axis center, and n is more than or equal to 3 Natural number；Needle head replacing mechanism is between the second motion state positioned at the next the first motion state set and positioned at upper position Switching, in lower position, needle head replacing mechanism moves down safe distance, the first motion state: needle head replacing mechanism turns over replacement angle α,So that not used injection needle is directed at syringe；In upper position, the not used injection needle) watertight feud pair It is connected to syringe, the second motion state: the needle head replacing mechanism idle running；
Micro-injection mechanism, the micro-injection mechanism is drivingly connected syringe and needle head replacing mechanism simultaneously, upper It sets, the micro-injection mechanism can drive injection ram to drive syringe needle while being displaced downwardly to lower limit position by upper limit position It replaces mechanism and completes the second motion state；In lower position, the micro-injection mechanism can drive injection ram by limit inferior position It sets driving needle head replacing mechanism while moving up to upper limit position and completes the first motion state.
Further, needle head replacing mechanism includes sun gear, at least n planetary gear and gear ring, at least n planet tooth Wheel is fixed on planet frame plate, and n is the natural number more than or equal to 3；Sun gear is fixedly connected with the solar shaft, n injection needle Respectively with planetary gear 22 coaxially, be telescopically arranged on planet frame plate.
Further, the micro-injection mechanism includes worm screw, the first worm gear and the second worm gear, the first worm gear and the second snail Wheel is engaged on the two sides of worm screw respectively；First worm gear is fixedly connected with driving nut, driving nut screw cooperation injection screw rod, injection Screw rod integrally connected injection ram, the second turbine are fixedly connected with the solar shaft.
Further, needle head replacing mechanism is set in the shell of syringe needle storehouse, and syringe needle storehouse shell inner wall face gear ring is equipped with flexible stop Sell (6), stretch one electromagnetism closing device of stop pin connection, the electromagnetism closing device make flexible latch in extended position and Switch between retracted position, in extended position, the latch that stretches pushes against gear ring external cylindrical surface and stop gear ring, in retracted position, Flexible latch retracted needle storehouse shell inner wall.
Further, first motion state specifically: flexible latch pushes against gear ring external cylindrical surface and stop gear ring So that gear ring is motionless, sun gear rotation drives planet frame plate and planetary gear and injection needle rotation；Second motion state Are as follows: the not used injection needle watertight feud butts up against syringe and makes planet frame plate motionless, and sun gear rotation drives gear ring Rotation, ring gear against rotation realize the needle head replacing mechanism idle running.
Further, it is connected with expansion regulating mechanism in the middle part of solar shaft, expansion regulating mechanism is in extended position and punctured bit Switch between setting, needle head replacing mechanism is driven to switch between upper position and lower position.
Further, solar shaft includes semiaxis under semiaxis and the sun on the sun disconnected, and expansion regulating mechanism includes upper half Docking section, lower half docking section, upper half docking section connect semiaxis on the sun, and lower half docking section connects semiaxis under the sun, lower half docking Portion guides to slide in the guide groove of sliding rack；Upper half docking section, lower half docking section are equipped with electromagnetism closing device.
Further, syringe bottom thread connects lower valve base, lower valve base integrally connected taper docking section, taper docking section packet Inner conical-tube and outer barrel are included, cartridge part is constituted between inner conical-tube and outer barrel, is equipped with elastomer in cartridge part, inner cone drum outer wall is set There is locating slot；Injection needle includes taper sheath, and taper sheath inner wall is equipped with positioning rib, the not used injection needle watertight feud docking In syringe are as follows: in the taper sheath of inner conical-tube insertion injection needle until in positioning rib indentation locating slot, meanwhile, liquid at the top of taper sheath Hermetically it is pressed into elastomer.
Further, including injection holder, injection holder include oversheath and the axis support of integrally connected, injector syringe top The connected upper guide holder in watertight feud, upper guide holder and lower valve base are respectively by the fixed oversheath of fixed block；It is solid in the middle part of solar shaft It is scheduled in axis support.
Further, lower valve base is equipped with the first check valve, and syringe is equipped with liquid inlet at lower limit position, in limes superiors position It sets place and is equipped with exhaust outlet, liquid inlet also is provided with second one-way valve.
The microinjection apparatus of the full-automation, in order to solve " more renew automatically the old syringe needle of syringe needle, automatic protection, from The technical problem of dynamic injection ", passes through following technological means:
1) 12 downlink of needle head replacing mechanism 20 and injection ram, the action of injection coordinated of uplink
Needle head replacing mechanism 20 uses planetary gear mechanism, and each planetary gear is coaxially provided with injection needle 26, needle head replacing Motion state that there are two types of mechanisms 20, the first motion state, when 26 watertight feud of injection needle butts up against syringe 11, planet frame plate and row Star gear is motionless, and sun gear rotation drives ring gear against rotation, realizes idle running；At this point, 12 downlink of injection ram, completes to inject Liquid；Second motion state, needle head replacing mechanism 20 move down safe distance L, and gear ring is motionless, and sun gear rotation drives planet carrier Plate and planetary gear rotation cross replacement angle α,At this point, 12 downlink of injection ram, completes return imbibition；
2) micro-injection mechanism 30 realizes the coordinated of above-mentioned movement
Micro-injection mechanism 30 is that stepper motor drives worm screw 31, and worm screw 31 drives the first worm gear 32 and second of engagement simultaneously Worm gear 33, the first worm gear 32 drive driving nut 34, and driving nut 34 and injection screw rod 35 constitute screw pair, drive nut 34 drive injection screw rod 35 and injection ram 12 to realize the downlink or uplink of injection ram.Meanwhile second worm gear 32 drive the sun Two kinds of motion states of the realization of axis 25 needle head replacing mechanism 20.
The present invention not only considered a problem from the movement of syringe intramuscular injection, but also must replace syringe needle in conjunction with syringe per injection It considers a problem, by the mutual coordinated of above two structures, substantially increases the degree of automation of microinjection apparatus, be Frequent micro-injection high-frequency needle exchange head reduces labor intensity, and the micro-injection of especially suitable treating diabetes and the room ICU are frequent The needs of micro-injection.
Detailed description of the invention
Fig. 1 is a kind of main sectional view of the injection state of the microinjection apparatus of full-automation of the invention.
Fig. 2 is a kind of main sectional view of the replacement syringe needle state of microinjection apparatus of full-automation of the present invention.
Fig. 3 is the main sectional view for more renewing one group of not used syringe needle of the full-automatic microinjection apparatus of the present invention.
Appended drawing reference in above-mentioned figure:
1 first button, 2 second buttons, 3 injection holders, 4 oversheaths, 5 first check valves, 6 flexible latch, 7 Second one-way valve
10 syringes, 11 syringes, 12 injection rams, guide holder on 13,14 piston screw rods, 15 taper docking sections, 16 elastomers, 18 lower valve bases
20 needle head replacing mechanisms, 21 sun gears, 22 planetary gears, 23 gear rings, 24 planet frame plates, 25 sun Axis, 26 injection needles, 27 placement holes, 28 annular retaining ribs, 29 syringe needle storehouse shells
30 micro-injection mechanisms, 31 worm screws, 32 first worm gears, 33 second worm gears, 34 driving nuts
40 expansion regulating mechanisms, 41 upper half docking sections, 42 lower half docking sections, 43 sliding racks, 44 guide grooves, 45 electromagnetism Closing device, 46 permanent magnets, 47 electromagnet
15.1 inner conical-tubes, 15.2 outer barreies, 15.3 cartridge parts, semiaxis on 25.1 sun, semiaxis under 25.2 sun, 47.1 iron cores, 47.2 coils
26.1 syringe needles, 26.2 needle stands, 26.3 taper sheaths, 26.4 positioning regions, 26.5 annular convex ribs
29.1 left half, 29.2 right half, 29.3 needles stretch out hole, 29.4 syringe needle port lids
Specific embodiment
It elaborates, but is not intended to limit the scope of the invention to the embodiment of the present invention below in conjunction with attached drawing.
As shown, a kind of microinjection apparatus of full-automation, including syringe 10, syringe 10 include 11 He of syringe Injection ram 12, the upper limit position P in syringe 11 of injection ram 121With lower limit position P2Between watertight feud be slidably matched, Hermetically connected upper guide holder 13,11 bottom thread of syringe connect lower valve base 18,18 integrally connected of lower valve base to 11 top water of syringe Taper docking section 15；Upper guide holder 13 and lower valve base 18 are fixed in the oversheath 4 of injection holder 3 by fixed block 5 respectively.Taper Docking section 15 includes inner conical-tube 15.1 and outer barrel 15.2, and cartridge part 15.3 is constituted between inner conical-tube 15.1 and outer barrel 15.2, Elastomer 16 is equipped in cartridge part 15.3.12 integrally connected piston screw rod 14 of injection ram.Injection needle 26 includes 26.1 He of syringe needle Needle stand 26.2, needle stand 26.2 include the from top to bottom taper sheath 26.3 of integrally connected, positioning region 26.4 and annular convex rib 26.5.Cone Shape covers 26.3 inner holes taper fit identical as inner conical-tube 15.1.Inner conical-tube 15.1 is inserted into the taper sheath 26.3 of injection needle, together When, 26.3 top liquid of taper sheath is hermetically pressed into elastomer 16.Lower valve base 18 is equipped with check valve 5,11 lower limit position P of syringe2 Place is equipped with liquid inlet, upper limit position P1Equipped with exhaust outlet, liquid inlet is equipped with check valve 5.
Needle head replacing mechanism 20 is equipped with below syringe 10, injection ram 12 and needle head replacing mechanism 20 respectively drive connection Micro-injection mechanism 30.Micro-injection mechanism 30 is fixed on injection holder 3.
Needle head replacing mechanism 20 includes sun gear 21, at least n planetary gear 22 and gear ring 23, at least n planet tooth Wheel 22 is fixed on planet frame plate 24, and n is the natural number more than or equal to 3.Sun gear 21, planetary gear 22, gear ring 23 and row The planetary gear mechanism of carrier plate 24 is arranged in syringe needle storehouse shell 29.Sun gear 21 is fixedly connected with solar shaft 25.Planet frame plate On 24 with planetary gear 22 coaxially, telescopically be equipped with injection needle 26 so that between adjacent needles 26 have replacement angle α,Specifically, it is coaxially equipped with placement hole 27 with planetary gear 22 on planet frame plate 24, is opened at the top of placement hole 27 Mouthful be equipped with annular retaining rib 28, inside is equipped with spring 28.1, positioning region 26.4 and 27 clearance fit of placement hole, complete injection needle 26 with The coaxial positioning of placement hole 27 and planetary gear 22.The annular convex rib 26.5 of injection needle 26 forces the ring at 27 top of indentation placement hole Shape retaining rib 28 abuts 26.5 bottom of annular convex rib of injection needle 26 at the top of spring 28.1 so that injection needle 26 in normal position and Switch between depressed position, in normal position, annular convex rib 26.5 abuts annular retaining rib 28, in depressed position, annular convex rib 26.5 bottoms compress spring 28.1 to limited compression position, syringe needle extended needle storehouse shell 29.There are two types of fortune for needle head replacing mechanism 20 Dynamic state, the first motion state are that gear ring 23 is motionless, and the rotation of sun gear 21 drives the rotation of planet frame plate.
The micro-injection mechanism 30 includes worm screw 31, the first worm gear 32 and the second worm gear 33, the first worm gear 32 and second Worm gear 33 is engaged on the two sides of worm screw 31 respectively；First worm gear 32 is fixedly connected with driving nut 34, and driving nut 34 is threadedly engaged Piston screw rod 14.Second worm gear, 33 inner hole is connected by key solar shaft 25.Worm screw 31 connects stepper motor by shaft coupling.
Solar shaft 25 includes semiaxis 25.2 under semiaxis 25.1 and the sun on the sun disconnected.It is connected with and stretches in the middle part of solar shaft 25 Contracting regulating mechanism 40, expansion regulating mechanism 40 switch needle head replacing mechanism 20 between upper position and lower position.It is flexible to adjust Saving mechanism 40 includes upper half docking section 41, lower half docking section 42, and upper half docking section 41 connects semiaxis 25.1 on the sun, lower half docking Portion 42 connects semiaxis 25.2 under the sun.Lower half docking section 42 guides to slide in the guide groove 44 of sliding rack 43, sliding rack 43 1 The support of body connecting shaft.Upper half docking section 41, lower half docking section 42 include electromagnetism closing device 45, specifically, the electromagnetism folding Device 45 includes at least one block permanent magnet 46 that upper half docking section 41 is arranged in and setting in the corresponding permanent magnet in lower half docking section 42 The electromagnet 47 of position, the electromagnet 47 include iron core 47.1 and coil 47.2, and coil 47.2 is powered by control circuit, work as line Circle is positive to be powered, then electromagnet 47 generates magnetism identical with 46 magnetic pole of permanent magnet, generates repulsive force, can force lower half docking section 42 flick the lower end of guide groove 44, and expansion regulating mechanism 40 is in extended position, at this point, lower half docking section 42 drives sun lower half Axis 25.2 and needle head replacing mechanism 20 move down, and injection needle 26 is detached from lower valve base 14, and solar shaft 25 is in elongation state, and makes syringe needle The planet carrier of replacement mechanism 20 can rotate and the injection needle 26 that more renews.When coil is reversely powered, then electromagnet 47 generates The magnetism opposite with 46 magnetic pole of permanent magnet, generates the suction-combining force, permanent magnet 46 attract iron core 47.1 and by upper half docking section 41, lower half Docking section 42 attracts together, and expansion regulating mechanism 40 is in retracted position, so that semiaxis 25.2 moves up under the sun, and makes Obtain 26 watertight feud plug connection lower valve base 18 of injection needle newly.
Because of the effect of expansion regulating mechanism 40, so that needle head replacing mechanism 20 switches between upper position and lower position. Shell 29 inner wall face gear ring 23 in syringe needle storehouse is equipped with pin mounting hole, sells and is equipped with flexible latch 6 in mounting hole, and the latch 6 that stretches connects An electromagnetism closing device 45 is connect, the electromagnetism closing device 45 makes flexible latch 6 between extended position and retracted position Switching, in extended position, the latch 6 that stretches pushes against gear ring external cylindrical surface and stop gear ring 23, and in retracted position, stretch latch 6 retract pin mounting hole.
When needle head replacing mechanism 20 is in lower position, the latch 6 that stretches, which stretches out, abuts gear ring outer wall, rotation stop gear ring 23, It is the first motion state to change needle head replacing mechanism 20, gear ring 23 is motionless, and sun gear 21 rotates, and drives planet frame plate 24 Rotate a replacement angle α.When needle head replacing mechanism 20 is in upper position, under new 26 watertight feud plug connection of injection needle Valve seat 18, the latch 6 that stretches retract, so that changing needle head replacing mechanism 20 is the second motion state, planet frame plate 24 is motionless, too Positive gear 21 rotates, and gear ring 23 is driven to rotate.The rotation of sun gear 21 is to activate the second worm gear 33 because of the rotation of worm screw 31 Drive, the rotation of worm screw 31 activates the first worm gear 31 simultaneously, and the rotation of the first worm gear 31 and driving nut 34 is with piston screw rod 14 and 12 downlink of injection ram, complete micro-injection work.
Injection holder 3 is equipped with the first button 1, the second button 2, and the first button 1 switch connects expansion regulating mechanism 40 and stretches Contracting latch 6.Second button 2 switch connection micro-injection mechanism 30.First button 1 is slidingtype button, and the first button 1 is being infused It penetrates between position, stop position and replacement needle position and slides.Stop position is located in injection position and replacement needle position Point.
For how to protect used injection needle, the injection needle how more to renew, because injection needle was because contacting patient Blood and body fluid, used injection needle belongs to medical pollutant, it is preferable that 29 upper wall of syringe needle warehouse lid includes telescopic Left half 29.1 and right half 29.2, syringe needle lower wall are equipped with needle and stretch out hole 29.3, and 29 lower wall of syringe needle warehouse lid is moveable up and down (not shown) covers syringe needle port lid 29.3, lower wall moves up, injection needle 26 after the n injection needle use in syringe needle storehouse shell 29 Taper sheath 26.3 under the compressing of upper wall, syringe needle 26.1 is forcibly pressed into needle stand 26.2, removes left half 29.1 and right half 29.2, injection needle 26 is taken away throw away medical waste dedicated box respectively.Syringe needle storehouse shell 29 is cleaned, is placed in new injection again Needle 26 can reuse the microinjection apparatus of the full-automation.
The movement of the microinjection apparatus of the full-automation is as follows:
The microinjection apparatus of the full-automation will be automatically performed two functions: 1. function of injection；That is piston downlink The movement of the feed liquor of action of injection and piston stroking upward；2. automatically replacement syringe needle function, the function be piston stroking upward movement simultaneously It completes.Needle head replacing mechanism 20 switches between upper position and lower position, in upper position, micro-injection function is completed, under Automatic replacement syringe needle function is completed in position.Needle head replacing mechanism 20 there are two types of motion state, the first motion state be gear ring 23 not Dynamic, the rotation of sun gear 21 drives the rotation of planet frame plate.The corresponding automatic replacement syringe needle function of first motion state and lower position.The Two motion states are that planet frame plate 24 is motionless, and sun gear 21 rotates, and gear ring 23 is driven to rotate.The corresponding injection of second motion state Function and upper position.
Concrete operations are as follows:
When first button 1 slides into replacement needle position, coil forward direction is powered, and solar shaft 25 is in elongation state, injects Syringe needle 26 is detached from lower valve base 18.Meanwhile it activating flexible latch 6 and arriving extended position.First button 1 slides into replacement needle position When, the second button 2 is pressed in the activation of the second button 2, starts micro-injection mechanism 30, and stepper motor drives worm screw 31 to turn counterclockwise Dynamic, worm screw 31 drives the first worm gear 32 and the second worm gear 33 to rotate respectively simultaneously, and the second worm gear 33 drives needle head replacing mechanism 20 It is moved by the first motion state, finally rotated a replacement angle α, meanwhile, the first worm gear 33 drives driving nut 34 to rotate, Driving nut 34 rises to the upper limit position of syringe with piston screw rod 14；
When first button 1 slides into injection position, coil is reversely powered, and solar shaft 25 is in shortening state, solar shaft 25 The new upward watertight feud of injection needle 26 is driven to be plugged in lower valve base 18, and when the first button 1 slides into injection position, second Button 2 activates, and presses the second button 2, starts micro-injection mechanism 30, and stepper motor drives worm screw 31 to rotate clockwise, worm screw 31 drive the first worm gear 32 and the second worm gear 33 to rotate respectively simultaneously, and the second worm gear 33 drives needle head replacing mechanism 20 by the second fortune Dynamic state motion, gear ring 23 dally；Meanwhile first worm gear 32 drive driving nut 34 rotate, drive nut 34 with piston silk Bar 14 moves down into the lower limit position of syringe, completes micro-injection work.The second button 2 why is needed, is because before injection There is the artificial movement for puncturing and entering muscle.
First button 1 slides into stop position, if the first button 1 slides into stop position from injection position, controls Mechanism activates expansion regulating mechanism 40, so that expansion regulating mechanism 40 is in extended position.In addition, stepper motor and the first button Stop power supply, full-automatic microinjection apparatus is off position.At this point, replaceable new injection needle 26.
The microinjection apparatus of the full-automation drives two worm gears using same worm screw simultaneously, rotates clockwise snail Function of injection is completed in bar, piston decline, gear ring idle running, is rotated counterclockwise the planet frame plate rotation simultaneously of worm screw piston stroking upward, is completed Syringe needle function is replaced, same micro-injection mechanism collaboration completes function of injection and replacement syringe needle function, substantially increases micro note The degree of automation of injection device.

Claims (10)

1. a kind of microinjection apparatus of full-automation, including syringe (10), syringe (10) includes syringe (11) and injection Piston (12), injection ram (12) is in syringe (11) in upper limit position (P1) and lower limit position (P2) between watertight feud It is slidably matched, which is characterized in that including
Needle head replacing mechanism (20), needle head replacing mechanism (20) are symmetrically equipped with n injection needle (26) with solar shaft (25), N is the natural number more than or equal to 3；Needle head replacing mechanism (20) is positioned at the next the first motion state set and positioned at upper position Switch between second motion state, in lower position, needle head replacing mechanism (20) moves down safe distance (L), the first motion state: needle Head replacement mechanism (20) turns over replacement angle α,So that not used injection needle (26) alignment syringe (11)；Upper Position, not used injection needle (26) the watertight feud butt up against syringe (11), the second motion state: the needle head replacing machine Structure (20) idle running；
Micro-injection mechanism (30), the micro-injection mechanism (30) are drivingly connected syringe (10) and needle head replacing mechanism simultaneously (20), in upper position, the micro-injection mechanism (30) can drive injection ram by upper limit position (P1) it is displaced downwardly to lower pole Extreme position (P2) while driving needle head replacing mechanism (20) complete second motion state；In lower position, the micro-injection machine Structure (30) can drive injection ram by lower limit position (P2) move up to upper limit position (P1) while drive needle head replacing machine Structure (20) completes the first motion state.
2. full-automatic microinjection apparatus as described in claim 1, which is characterized in that needle head replacing mechanism (20) includes too Positive gear (21), at least n planetary gear (22) and gear ring (23), at least n planetary gear (22) are fixed on planet frame plate (24) on, n is the natural number more than or equal to 3；Sun gear (21) is fixedly connected the solar shaft (25), n injection needle (26) Respectively with planetary gear 22 coaxially, be telescopically arranged on planet frame plate (24).
3. full-automatic microinjection apparatus as claimed in claim 2, which is characterized in that micro-injection mechanism (30) packet Worm screw (31), the first worm gear (32) and the second worm gear (33) are included, the first worm gear (32) and the second worm gear (33) are engaged on snail respectively The two sides of bar (31)；First worm gear (32) is fixedly connected with driving nut (34), and driving nut (34) threaded engagement injects screw rod (14), screw rod (14) integrally connected injection ram (12) is injected, the second turbine (33) is fixedly connected with the solar shaft (25).
4. full-automatic microinjection apparatus as claimed in claim 3, which is characterized in that needle head replacing mechanism is set to syringe needle storehouse In shell (29), syringe needle storehouse shell (29) inner wall face gear ring (23) is equipped with flexible latch (6), and stretch one electricity of latch (6) connection Magnetic closing device (45), the electromagnetism closing device (45) make flexible latch (6) between extended position and retracted position Switching, in extended position, flexible latch (6) push against gear ring external cylindrical surface and stop gear ring (23) stretches only in retracted position Dynamic pin (6) retracted needle storehouse shell (29) inner wall.
5. full-automatic microinjection apparatus as claimed in claim 4, which is characterized in that first motion state is specific Are as follows: flexible latch (6) push against gear ring external cylindrical surface and stop gear ring (23) makes gear ring (23) motionless, and sun gear (21) turns It is dynamic to drive planet frame plate (24) and planetary gear (22) and injection needle (26) rotation；Second motion state are as follows: described not make Injection needle (26) watertight feud butts up against syringe (11) and makes planet frame plate (24) motionless, sun gear (21) rotation, band Needle head replacing mechanism (20) idle running is realized in movable tooth circle (23) rotation, gear ring (23) rotation.
6. the full-automatic microinjection apparatus as described in claim 2-5 is any, which is characterized in that connect in the middle part of solar shaft (25) It is connected to expansion regulating mechanism (40), expansion regulating mechanism (40) switches between extended position and retracted position, drives syringe needle more Structure (20) of changing planes switches between upper position and lower position.
7. full-automatic microinjection apparatus as described in claim 1, which is characterized in that solar shaft (25) includes disconnecting too Semiaxis (25.2) under semiaxis (25.1) and the sun on sun, expansion regulating mechanism (40) include upper half docking section (41), lower half docking Portion (42), upper half docking section (41) connect semiaxis (25.1) on the sun, and lower half docking section (42) connect semiaxis (25.2) under the sun, Lower half docking section (42) guides to sliding in the guide groove (44) of sliding rack (43)；Upper half docking section (41), lower half docking section (42) electromagnetism closing device (45) are equipped with.
8. full-automatic microinjection apparatus as claimed in claim 3, which is characterized in that under the connection of syringe (11) bottom thread Valve seat (18), lower valve base (18) integrally connected taper docking section (15), taper docking section (15) include inner conical-tube (15.1) and outer Cylinder (15.2) constitutes cartridge part (15.3) between inner conical-tube (15.1) and outer barrel (15.2), and cartridge part is equipped in (15.3) Elastomer (16), inner conical-tube (15.1) outer wall are equipped with locating slot (19)；Injection needle (26) includes taper sheath (26.3), taper sheath (26.3) inner wall is equipped with positioning rib (17), and not used injection needle (26) the watertight feud butts up against syringe (11) are as follows: inner cone In the taper sheath (26.3) of cylinder (15.1) insertion injection needle until in positioning rib (17) indentation locating slot (16), meanwhile, taper Liquid is hermetically pressed into elastomer (16) at the top of set (26.3).
9. full-automatic microinjection apparatus as claimed in claim 8, which is characterized in that including injection holder (3), injection holder It (3) include that the oversheath (4) of integrally connected and axis support, injector syringe (11) top water are hermetically connected and go up guide holder (13), upper guide holder (13) and lower valve base (18) are respectively by fixed block (5) fixed oversheath (4)；It is fixed in the middle part of solar shaft In axis support.
10. full-automatic microinjection apparatus as claimed in claim 8, which is characterized in that it is single that lower valve base (18) is equipped with first To valve (5), syringe (11) is in lower limit position (P2) at be equipped with liquid inlet, in upper limit position (P1) at be equipped with exhaust outlet, enter liquid Mouth also is provided with second one-way valve (7).
CN201910705144.XA 2019-08-01 2019-08-01 Full-automatic micro-injection device Active CN110404141B (en)

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