CN110279914A - Powder charge multiple injection needleless injector - Google Patents
Powder charge multiple injection needleless injector Download PDFInfo
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- CN110279914A CN110279914A CN201910735673.4A CN201910735673A CN110279914A CN 110279914 A CN110279914 A CN 110279914A CN 201910735673 A CN201910735673 A CN 201910735673A CN 110279914 A CN110279914 A CN 110279914A
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- 238000002347 injection Methods 0.000 title claims abstract description 92
- 239000007924 injection Substances 0.000 title claims abstract description 92
- 239000000843 powder Substances 0.000 title claims abstract description 29
- 239000000306 component Substances 0.000 claims abstract description 99
- 239000007788 liquid Substances 0.000 claims abstract description 76
- 239000003814 drug Substances 0.000 claims abstract description 41
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 239000008358 core component Substances 0.000 claims abstract description 15
- 229940079593 drug Drugs 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 44
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 12
- 239000013589 supplement Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 41
- 238000000034 method Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- -1 22-1 Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 206010033675 panniculitis Diseases 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 229960003127 rabies vaccine Drugs 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 210000004304 subcutaneous tissue Anatomy 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/08—Tubes; Storage means specially adapted therefor
-
- 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
- A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
-
- 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
-
- 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
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
- A61M5/31543—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change
-
- 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
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
-
- 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
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
- A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger 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
- A61M2005/3128—Incorporating one-way valves, e.g. pressure-relief or non-return valves
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Pulmonology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention provides an a kind of powder charge multiple injection needleless injector, including medicine core component, active air pressure propulsion assembly, driven hydraulic drive component and closing end component, the medicine core component is connected to the front end of driven hydraulic drive component, the storage and injection for medical fluid；The driven hydraulic drive component is connected with active air pressure propulsion assembly, and for providing the power of injecting liquid drug, the closing end component envelope is located at the tail portion of active air pressure propulsion assembly.The syringe uses disposable medicine core component, realizes a powder charge multiple injection, safety and sanitation are easy to operate.
Description
Technical field
The present invention relates to the field of medical instrument technology, more particularly to an a kind of powder charge multiple injection needleless injector.
Background technique
Needleless injector is not needed when carrying out drug injection by syringe needle, using high pressure principle so that medical fluid formed compared with
Thin jet stream, moment penetrate skin and reach subcutaneous.
Needleless injection can't see syringe needle, will psychologically be preferably minimized to the conflict for the treatment of, and the compliance for the treatment of will mention
Height, especially children.Needleless injection can bring many benefits to patient, have and greatly reduced needle injection bring pain
Hardship, the benefits such as formation hardened after being injected repeatedly without injection site.Some treatments, need physically to carry out multi-point injection,
Such as rabies vaccine, cicatrical tissue is treated for another example.
Existing needleless injector mostly uses compressed gas or compressed spring as power source, such as publication No.
The application for a patent for invention of CN107297001, it discloses a kind of gas-driven needle-less syringe, using compressed gas as power source,
By pushing piston rod directly to hit injection putter for the subcutaneous tissue of injecting liquid drug to human body.Existing needleless injector problem:
For a powder charge multiple injection, need to disassemble syringe cleaning and sterilizing every time, it is inconvenient；In order to safe and healthy and be convenient for
Operation, using disposable medicine core, but can not achieve a powder charge multiple injection using disposable medicine core.
Summary of the invention
The technical problems to be solved by the present invention are: in order to overcome the shortcomings in the prior art, the present invention, which provides one kind, to be made
With disposable medicine core, and the needleless injector of a powder charge multiple injection.
For the ease of the understanding of the present invention program, following explanation is made:
(1) before being with the dispensing end of syringe about directional terminologies such as front and backs in the present invention, after the other end is；
(2) " free state " in the present invention refers to the reset state before use.
(3) " all injections " refers to that medicine core Chinese medicine liquid all complete by injection in the present invention；" one injection " refers in medicine core
Injecting liquid drug it is primary after, may still have medical fluid for next point inject.
The present invention solves its technical problem technical solution to be taken: an a kind of powder charge multiple injection Needleless injection
Device, including medicine core component and propulsion assembly, the medicine core component are connected to the front end of propulsion assembly, storage and note for medical fluid
It penetrates；For the propulsion assembly for providing the power of injecting liquid drug, the propulsion assembly includes active air pressure propulsion assembly and driven
Hydraulic drive component, when injection, the power of active air pressure propulsion assembly passes to medicine core component by driven hydraulic drive component
Medical fluid push rod realize that supplement hydraulic medium guarantees active gas after injection, one injection completion and active air pressure propulsion assembly reset
Pressure propulsion assembly power can pass to medical fluid push rod again by driven hydraulic drive component and realize injection.
Further, in order to meet being precisely controlled for injection dosage, the driven hydraulic drive component includes driven lumen, step
Into piston component, hydraulic piston, driven hydraulic cavities, active hydraulic cavities, back pressure component, check valve assembly, aerial drainage component and low pressure
Oil circuit, the stepper piston component along it is axially slidable be arranged in the driven hydraulic cavities, and with driven hydraulic cavity wall
It is tightly connected, to constituting active hydraulic cavities after back pressure component before hydraulic piston, to after stepper piston before back pressure component
Driven hydraulic cavities are constituted, active hydraulic cavities pass through unidirectional by back pressure component and driven hydraulic cavities unilaterally connected, active hydraulic cavities
Valve module and low pressure oil way unilaterally connected, driven hydraulic cavities are ended or are connected to low pressure oil way by aerial drainage component.Using hydraulic
The purpose of system is to realize medicine core push rod moving ahead step by step, and each run of stepper piston is less than the total of medicine core push rod
Stroke is to realize a powder charge multiple injection.Active hydraulic package is in active hydraulic cavities and constitutes sealing, and stepper piston exists
In driven hydraulic cavities and constitute sealing.
The present invention is to push stepper piston to advance using hydraulic medium as transmitting medium, and stepper piston pushes medical fluid push rod
It moves ahead and realizes injection, supplement certain hydraulic medium after single injection, it is ensured that the power of air rammer is begun by hydraulic medium
Stepper piston can be passed to eventually, to realize a powder charge multiple injection.Injection dosage by stepper piston stroke each time
Determine, that is, the hydraulic medium by being added every time in driven hydraulic cavities number determine.
Specifically, the guide rod that the back pressure component is arranged between driven hydraulic cavities and active hydraulic cavities is intracavitary, including back
Pressing spring, guide rod and back-pressure sealing part, the back pressure spring are set in the guide rod front end, and are collectively disposed at the guide rod chamber
Interior, the back-pressure sealing part is arranged in the rear end of guide rod, and under free state, the back pressure spring makes the guide rod and back-pressure sealing
Part is against active hydraulic cavities on the inlet of driven hydraulic cavities feed liquor.Wherein, the purpose that back pressure component is arranged is in order to one
Prevent hydraulic medium from entering driven hydraulic cavities when supplementing hydraulic medium to active hydraulic cavities after secondary injection, back-pressure sealing part can be adopted
With back pressure ball, rubber pad also can be used or sealing ring replaces back pressure ball by inlet one-way sealing.
Specifically, the stepper piston component includes stepper piston and seals for stepper piston with driven hydraulic cavities close
Seal and retaining ring, the sealing ring and the equal ring of retaining ring are located on the sealing surface between stepper piston and driven hydraulic cavities.
Further, in order to guarantee the stability of syringe actively hydraulic cavity pressure, liquid, the driven hydraulic thrust are avoided back
It further include the check valve assembly being arranged between driven hydraulic drive component and active air pressure propulsion assembly into component, it is described unidirectional
Valve module includes valve seat, check valve plug, one-way sealing blocking and check valve pressure spring, and valve chamber is equipped in the valve seat, described unidirectional
Valve plug head, one-way sealing blocking and check valve pressure spring are arranged in valve chamber, and check valve plug one end is against the front end of valve chamber,
The other end is arranged check valve pressure spring, and the other end of the check valve pressure spring connects with the one-way sealing blocking that valve chamber inlet is arranged in
It connects, when feed liquor, the liquid outlet of the valve chamber and the active hydraulic chamber into communication.It can make hydraulic medium by the way that check valve is arranged
It is unidirectional to enter, it is caused after avoiding pressure from increasing to return liquid, it ensure that the stability of actively hydraulic cavity pressure.
Due to using one-way valve structures, the hydraulic medium into driven lumen cannot flow back, therefore, further, described
Driven hydraulic drive component further includes aerial drainage component, and the aerial drainage component includes the aerial drainage chamber being arranged on valve seat, the aerial drainage
Intracavitary to be equipped with aerial drainage spool and aerial drainage spring, it is intracavitary that aerial drainage spool one end connection aerial drainage spring is placed in aerial drainage, described to let out
The flow valve core other end extends outward aerial drainage chamber；Aerial drainage runner is offered on the aerial drainage spool, when being in bleed state, institute
It states aerial drainage runner and is connected to the guide rod chamber and aerial drainage chamber.Cartridge Chinese medicine liquid is all after the completion of injection, stepper piston need using
Specific purpose tool resets, reseting procedure are as follows: specific purpose tool pressure aerial drainage component is connected to driven hydraulic cavities with low pressure oil way, special tool
Tool pushes stepper piston that the hydraulic medium in driven hydraulic cavities is made to flow back to low pressure oil way by aerial drainage component, and stepper piston is realized multiple
Position.
Active air pressure propulsion assembly includes the gas-liquid piston component being arranged in inside inner cylinder, be equipped in the inner cylinder mutually every
From active hydraulic cavities and cylinder chamber, cylinder chamber include cylinder rod chamber and cylinder rodless cavity, the gas-liquid piston component includes
Gas-liquid piston bar, gas-liquid piston bar one end are equipped with air rammer, and the other end is equipped with hydraulic piston, the air rammer setting
It being tightly connected in the cylinder chamber, and with cylinder cavity wall, the hydraulic piston is arranged in the active hydraulic cavities, and with
Actively hydraulic cavity wall sealed connection, the air rammer and hydraulic piston can be synchronous in cylinder chamber with active hydraulic cavities respectively
It moves back and forth, the cylinder rodless cavity of the air rammer rear end is connected to external air source, the active liquid of the hydraulic piston front end
Press guide rod chamber unilaterally connected of the chamber through back pressure component Yu driven lumen.
Different patient needs the dosage for the medical fluid injected to be not quite similar, therefore, it is necessary to the syringe of a variety of injection measurements,
For the ease of production, the gas-liquid piston component further includes dosage adjusting set, and it is living that the dosage adjusting set is fixed on the gas-liquid
On stopper rod, when free state, the distance of the dosage adjusting set front end face to atmospheric pressure cavity front inner wall be gas-liquid piston bar most
Big effective travel.The length of dosage adjusting set can be configured according to volume requirements, therefore, when the injection of production various dose
When device, without changing the structure size of gas-liquid piston bar, only need to adjust dosage adjusting set mounted thereto can be obtained difference
The syringe of dosage, greatly improved production efficiency.
Complete one injection after, need to reset gas-liquid piston bar, in order to can Rapid reset, the gas-liquid
Piston component further includes reset spring, and the reset spring is set on gas-liquid piston bar, and both ends are gentle with atmospheric pressure cavity respectively
Piston abuts.Upon injection since the rodless cavity pressure of atmospheric pressure cavity increases, air rammer is moved forward, compression reseting spring,
It is set to store elastic potential energy, when the gas source of inlet end is closed, air pressure decline can answer rapidly under the action of reset spring
Position.The air sealed by preliminary test, between air rammer and hydraulic piston can also make piston reset, but in order to more
Reset spring can reliably be added.
Further, gas-liquid piston bar can be with integrally connected, can also be with split settings, in order to assemble and easy to process, this hair
It is bright preferably use split settings, including with air rammer integrally connected pneumatic piston rod and with hydraulic piston integrally connected
The tail portion of liquid presses piston pole, pneumatic piston rod and liquid presses piston pole is connected with each other, and junction is equipped with position limiting convex ring.It is infusing every time
When penetrating, dosage adjusting set can all collide with atmospheric pressure cavity, and dosage adjusting set can be stuck on position limiting convex ring, avoid in syringe
It is frequently shifted using post dose adjusting set position, causes injection dosage to increase or excessively, influence patient body health.
Further, in order to generate high-speed jet, realize that injecting liquid drug, the cross-sectional area of the hydraulic piston are less than pneumatic living
The cross-sectional area of plug, that is to say, that be mounted on hydraulic piston in active hydraulic cavities and be less than the air rammer being mounted in cylinder chamber.
The injection speed of injection and the pressure of propulsive force are directly proportional, and when one timing of injection injection speed, i.e., pressure is certain, works as cylinder
When rodless cavity inputs gas pressure, if the size of the piston of two sides is identical or hydraulic piston is bigger than air rammer, this is just
It is required that the pressure that gas input provides is bigger；Therefore, when hydraulic piston is less than air rammer, hydraulic medium can be increased
Pressure, can reduce bleed pressure or reduce syringe diameter.
It further, further include that envelope is located at propulsion assembly tail portion for connecting the closing end component of external impetus gas source, in order to anti-
Air pressure lower state lower piston travelling when only air inlet is initial, medical fluid pressure is too low at this time not can enter skin, the end socket group
Part includes the end socket for being sealedly connected on tube rear end in cylinder, and the front end of the end socket is equipped with and is arranged in the air rammer rear end
The matched suction iron of magnet, the rear end of the end socket is equipped with the oil inlet of active hydraulic chamber into communication and connects with cylinder rodless cavity
Logical air inlet, the oil inlet connect external hydraulic medium by oil circuit connector, and the air inlet is connected by gas path joint
External air source.Under free state, magnet and suction iron are attracted, and could be transported using the sufficiently high air rammer of air pressure is only worked as after magnet
It is dynamic.It avoids air pressure and not yet rises to sufficiently high air rammer and pushed.It inhales between iron and end socket to be threadedly coupled, turns
The initial position for inhaling the adjustable gas-liquid piston component of iron, to adjust bolus doses.
Further, for beautiful and protection internal structure, the end socket rear end is additionally provided with hood, and the hood is by air inlet
It is located inside with end socket, is equipped with the via hole passed through for pipeline in the middle part of the hood.
Further, the medicine core component includes cartridge and medical fluid push rod, and the cartridge is removably connected by swivel nut
It connects in the front end of driven lumen, medical fluid push rod one end is arranged in cartridge, and the other end extends to the driven of driven lumen
In hydraulic cavities, and the medical fluid push rod can move axially in cartridge.
Medical fluid component is used for drug storage and injection, and in order to safe and healthy, medical disposable material can be used；The single of stepper piston
Stroke is less than the total kilometres of medicine core push rod, thereby realizes a powder charge multiple injection；The diameter of stepper piston can be greater than
The diameter of hydraulic piston can be further improved stepper piston to the thrust of medicine core push rod in this way；Hydraulic piston after one injection
Bar reset when need in active hydraulic cavities increase certain volume hydraulic medium (present invention in preferred hydraulic oil, because being referred to herein as
" repairing "), to guarantee that stepper piston moves on when injecting next time.Hydraulic medium can be stored up by way of negative pressure from outside
It is extracted in fluid cylinder, still, negative pressure extracting can make the gas evolution dissolved in hydraulic medium form bubble, and unreliable, influence
Injection dosage precision.So what hydraulic medium was entered preferably by low pressure supplement.
Working principle:
To composition active hydraulic cavities after back pressure component before hydraulic piston, back pressure component is before to structure after stepper piston
At driven hydraulic cavities, active hydraulic cavities pass through check valve by back pressure component and driven hydraulic cavities unilaterally connected, active hydraulic cavities
Component and low pressure oil way unilaterally connected, driven hydraulic cavities are ended or are connected to low pressure oil way by aerial drainage component.
When injection, gas source is connected, high pressure gas is inputted by the air inlet on end socket, due to the suction-combining force of magnet and suction iron
Effect, when air pressure overcomes the suction-combining force, magnet with inhale iron separate, under gas pressure, push gas-liquid piston bar forward movement,
Compression reseting spring simultaneously, the air pneumatically sealed between hydraulic piston are also compressed, and provide power for piston reset；Liquid
Press piston rod squeeze active hydraulic cavities in hydraulic medium, active hydraulic cavities pressure rise, hydraulic medium push open back pressure component into
Enter driven hydraulic cavities and then stepper piston is pushed to move ahead, stepper piston pushes medical fluid push rod to realize one injection；
After single injection when repairing, liquid presses piston pole resets, the hydraulic medium in low pressure oil way push open one-way sealing blocking into
Become owner of hydrodynamic pressure chamber and realize repairing, in oil replenishing process back pressure component active hydraulic cavities are isolated with driven hydraulic cavities to prevent halt into
Piston malfunction.Second of injection can be carried out, and so on, until cartridge Chinese medicine liquid all complete by injection.
Cartridge Chinese medicine liquid is all after the completion of injection, and stepper piston needs to reset using specific purpose tool, reseting procedure are as follows: specially
It is connected to driven hydraulic cavities with low pressure oil way with tool pressure aerial drainage component, specific purpose tool pushes stepper piston to make driven hydraulic cavities
In hydraulic medium low pressure oil way is flowed back to by aerial drainage component, stepper piston, which is realized, to be resetted.
The beneficial effects of the present invention are: a kind of powder charge multiple injection needleless injector provided by the invention, uses one
Secondary property medicine core component, realizes a powder charge multiple injection, and safety and sanitation are easy to operate.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention, and direction and reference can be only
It is used to help the description to the feature in attached drawing.Therefore, following specific embodiments are used not in restrictive sense, and
The range of claimed theme is only limited by appended claims and its equivalent form.
Fig. 1 is the structural schematic diagram of preferred embodiment.
Fig. 2 is the structural schematic diagram of aerial drainage component.
In figure: 1, cartridge, 2, medical fluid push rod, 3, swivel nut, 4, driven lumen, 5, stepper piston, 6, sealing ring, 7, safety
Hole, 8, back pressure spring, 9, aerial drainage spool, 10, aerial drainage runner, 11, aerial drainage chamber, 12, aerial drainage spring, 13, active hydraulic cavities, 14,
Hydraulic piston, 15, inner cylinder, 16, reset spring, 17, dosage adjusting set, 18, cylinder rod chamber, 19, air rammer, 20, magnet,
21, suction iron, 22-1, fuel feed hole, 22-2, air inlet, 23, end socket, 24-1, oil circuit connector, 24-2, gas path joint, 25, hood,
26, via hole, 27, outer cylinder, 28, pneumatic piston rod, 30, liquid presses piston pole, 31, valve seat, 32, one-way sealing blocking, 33, check valve pressure
Spring, 34, back-pressure sealing part, 35, check valve plug, 36, guide rod, 37, guide rod chamber, 38, front cover, 39, retaining ring, 40, from hydrodynamic pressure
Chamber, 41, medicinal liquid cavity, 42, low pressure oil way.
Specific embodiment
Presently in connection with attached drawing, the present invention is described in detail.This figure is simplified schematic diagram, is only illustrated in a schematic way
Basic structure of the invention, therefore it only shows the composition relevant to the invention.
As shown in Figure 1, powder charge multiple injection needleless injector of one kind of the invention, including medicine core component, propulsion group
Part and closing end component, propulsion assembly include active air pressure propulsion assembly and driven hydraulic drive component, and when injection, active air pressure is pushed away
Power into component realizes that injection, one injection are completed by the medical fluid push rod that driven hydraulic drive component passes to medicine core component
And supplement hydraulic medium guarantees that active air pressure propulsion assembly power can be again by driven after the reset of active air pressure propulsion assembly
Hydraulic drive component passes to medical fluid push rod and realizes injection.Propulsion assembly is integrally provided in 15 inside cavity of inner cylinder, and inner cylinder 15 is set
It sets in outer cylinder 27, outer cylinder 27 is mainly used for same inner cylinder 15 and constitutes low pressure oil way 42 together, installs air rammer inside inner cylinder 15
19 be cylinder chamber, and installing hydraulic piston is main hydrodynamic pressure chamber 13, wherein in cylinder chamber air rammer back be cylinder without
Rod cavity, air rammer front is cylinder rod chamber 18 in cylinder chamber, and cylinder rod chamber 18 and active hydraulic cavities 13 pass through hydraulic work
It is mutually isolated to fill in 14.
Medicine core component includes cartridge 1 and medical fluid push rod 2, and the cartridge 1 is removably attachable to driven by swivel nut 3
The front end of lumen 4, described 2 one end of medical fluid push rod are arranged in the medicinal liquid cavity 41 of cartridge 1, and the other end extends to driven lumen 4
It is interior, and the medical fluid push rod 2 can move axially in cartridge 1.
Driven hydraulic drive component includes driven lumen 4, stepper piston component, hydraulic piston 14, driven hydraulic cavities 40, master
Hydrodynamic pressure chamber 13, back pressure component, check valve assembly and low pressure oil way 42, the stepper piston component is along axially slidable setting
Be tightly connected in the driven hydraulic cavities 40, and with driven 40 inner wall of hydraulic cavities, before hydraulic piston 14 to back pressure component it
Active hydraulic cavities 13 are constituted afterwards, and back pressure component constitutes driven hydraulic cavities 40 to stepper piston 5 before later, and active hydraulic cavities 13 are logical
Back pressure component and driven 40 unilaterally connected of hydraulic cavities are crossed, active hydraulic cavities 13 are unidirectionally connected by check valve assembly with low pressure oil way 42
Logical, driven hydraulic cavities 40 are ended or are connected to low pressure oil way 42 by aerial drainage component.
Wherein, driven lumen 4 includes the driven hydraulic cavities 40 and guide rod chamber 37, driven hydraulic cavities 40 and guide rod of front and back connection
It is equipped with partition between chamber 37, is used for fixed spring；Stepper piston component include stepper piston 5 and for stepper piston 5 with it is driven
The sealing ring 6 and two retaining rings 39 that hydraulic cavities 40 seal, sealing ring 6 are located between two retaining rings 39；The back pressure component setting
In guide rod chamber 37 between driven hydraulic cavities 40 and active hydraulic cavities 13, including back pressure spring 8, guide rod 36 and back-pressure sealing part
34, the back pressure spring 8 is set in 36 front end of guide rod, and is collectively disposed in the guide rod chamber 37 with guide rod 36, the back
Laminate seal 34 is arranged in the rear end of guide rod 36, and under free state, the back pressure spring 8 is in resilient support state, makes described
Guide rod 36 and back-pressure sealing part 34 are against on the liquid outlet of check valve assembly, when injection, back-pressure sealing part 34 drive guide rod 36 to
Back pressure spring 8 is compressed in preceding movement, and when reset, back pressure spring 8 is bounced.Back-pressure sealing part 34 uses back pressure ball in the present embodiment.
The purpose of check valve assembly setting is for unilaterally connected active hydraulic cavities 13 and low pressure oil way 42, including valve seat
31, check valve plug 35, one-way sealing blocking 32 and check valve pressure spring 33, the valve seat 31 is interior to be equipped with valve chamber, the unidirectional valve plug
First 35, one-way sealing blocking 32 and check valve pressure spring 33 are arranged in valve chamber, and described 35 one end of check valve plug is against valve chamber
Front end, the other end are arranged check valve pressure spring 33, the other end of the check valve pressure spring 33 with the unidirectional of valve chamber inlet is set
Ball sealer 32 connects, and when feed liquor, the liquid outlet of the valve chamber is connected to the active hydraulic cavities 13.It can by setting check valve
So that hydraulic medium unidirectionally enters, and it is caused after avoiding pressure from increasing to return liquid, it ensure that the stability of 13 pressure of active hydraulic cavities.
Due to the presence of back pressure component, the hydraulic medium into driven hydraulic cavities 40 cannot flow back, therefore, further, institute
Stating driven hydraulic drive component further includes aerial drainage component, as shown in Fig. 2, the aerial drainage component includes that letting out on valve seat 31 is arranged in
Chamber 11 is flowed, aerial drainage spool 9 and aerial drainage spring 12 are equipped in the aerial drainage chamber 11, described 9 one end of aerial drainage spool connects aerial drainage spring
12 are placed in aerial drainage chamber 11, and 9 other end of aerial drainage spool extends outward aerial drainage chamber 11；It is opened up on the aerial drainage spool 9
There is aerial drainage runner 10, when being in bleed state, the aerial drainage runner 10 is connected to the guide rod chamber 37 and aerial drainage chamber 11.Cartridge
1 Chinese medicine liquid is all after the completion of injection, and stepper piston 5 needs to reset using specific purpose tool, reseting procedure are as follows: specific purpose tool pressure is let out
Stream component is connected to driven hydraulic cavities 40 with low pressure oil way, and specific purpose tool pushes stepper piston 5 to make the liquid in driven hydraulic cavities 40
Pressure medium flows back to low pressure oil way by aerial drainage component, and stepper piston 5, which is realized, to be resetted.
31 front end of valve seat is equipped with the front cover 38 for protection, and front cover 38 is equipped with safety vent 7, and pressure releasing valve core is prolonged by pressure-releasing chamber
It extends in safety vent 7, but does not stretch out safety vent 7, avoid the false triggering pressure releasing valve core in injection process, influence the injection of medical fluid.
Active air pressure propulsion assembly includes the gas-liquid piston component being arranged in inside inner cylinder 15, is equipped with phase in the inner cylinder 15
The active hydraulic cavities 13 and cylinder chamber being mutually isolated, cylinder chamber include cylinder rod chamber 18 and cylinder rodless cavity, the gas-liquid piston
Component includes gas-liquid piston bar, and gas-liquid piston bar one end is equipped with air rammer 19, and the other end is equipped with hydraulic piston 14, described
Air rammer 19 is arranged in the cylinder chamber, and is tightly connected with cylinder cavity wall, and the hydraulic piston 14 is arranged described
It in active hydraulic cavities 13, and is tightly connected with 13 inner wall of active hydraulic cavities, the air rammer 19 and hydraulic piston 14 can be distinguished
Synchronous reciprocating is mobile in cylinder chamber and active hydraulic cavities 13, the cylinder rodless cavity of 19 rear end of air rammer in injection with
External air source connection, guide rod chamber 37 of the active hydraulic cavities 13 of 14 front end of hydraulic piston through back pressure component Yu driven lumen 4
Unilaterally connected.
Different patient needs the dosage for the medical fluid injected to be not quite similar, therefore, it is necessary to the syringe of a variety of injection measurements,
For the ease of production, the gas-liquid piston component further includes dosage adjusting set 17, and the dosage adjusting set 17 is fixed on the gas
On liquid piston rod, when free state, the distance of 17 front end face of dosage adjusting set to 18 front inner wall of cylinder rod chamber is gas
The max die travel distance of liquid piston rod.The length of dosage adjusting set 17 can be configured according to volume requirements, therefore, work as production
When the syringe of various dose, without changing the structure size of gas-liquid piston bar, it need to only adjust dosage mounted thereto and adjust
Set 17 can be obtained the syringe of various dose, and production efficiency greatly improved.
It after one injection, needs to reset gas-liquid piston bar, in order to realize Rapid reset, the gas-liquid piston component
Further include reset spring 16, the reset spring 16 is set on gas-liquid piston bar, and both ends respectively with cylinder rod chamber 18 and
Air rammer 19 abuts.Upon injection since cylinder rodless cavity pressure increases, air rammer 19 is moved forward, compression reseting spring
16, so that it is stored elastic potential energy, when the gas source of inlet end is closed, air pressure decline can be fast under the action of reset spring 16
Reply immediately position.On the other hand, when assembly, cylinder rod chamber 18 forms a closed cavity, and the Forward of air rammer 19 makes when injection
The compression of closed cavity air, the compressing force can also provide the reset force of air rammer 19.Third, when repairing, according to low pressure
Repairing can also provide the reset force of hydraulic piston 14.
Further, gas-liquid piston bar can be with integrally connected, can also be with split settings, in order to assemble and easy to process, this hair
It is bright preferably to use split settings, integrally including the pneumatic piston rod 28 with 19 integrally connected of air rammer and with hydraulic piston 14
The tail portion of the liquid presses piston pole 30 of connection, pneumatic piston rod 28 and liquid presses piston pole 30 is connected with each other.
The closing end component includes the end socket 23 for being sealedly connected on 15 rear end of cylinder inner cylinder, and the front end of the end socket 23 is equipped with
With the matched suction iron 21 of magnet 20 that 19 rear end of air rammer is arranged in, the rear end of the end socket 23 is equipped with and low pressure oil way
The oil inlet 22-1 of connection and the air inlet 22-2, the oil inlet 22-1 being connected to cylinder rodless cavity pass through oil circuit connector
24-1 connection external hydraulic medium, the air inlet 22-2 pass through gas path joint 24-2 connection external air source.Under free state, magnetic
Iron 20 and suction iron 21 are attracted, in air inlet, because there are gas circuit resistance, air pressure, which reaches peak, a lag time, magnet 20
Suction can prevent the air rammer 19 in the case where air inlet initial instant air pressure is very low from moving ahead, and cause the outflow of medical fluid low pressure can not
Into in human body.It inhales between iron 21 and end socket 23 to be threadedly coupled, turns and inhale the initial of the adjustable gas-liquid piston component of iron 21
Position, to adjust bolus doses.
Low pressure oil way 42 is constituted between outer cylinder 27 and cylinder inner cylinder 15, the rear end of the end socket 23 is additionally provided with interconnected
Fuel feed hole 22-1 and oil circuit connector 24-1, oil circuit connector 24-1, fuel feed hole 22-1, low pressure oil way 42 and one-way sealing blocking 32 are constituted
The repairing channel of low pressure oil way；It is logical that oil circuit connector 24-1, fuel feed hole 22-1, low pressure oil way 42 and aerial drainage runner 10 constitute aerial drainage
Road.
In order to which beautiful and protection internal structure, 23 rear end of end socket are additionally provided with hood 25, the hood 25 connects oil circuit
Head 24-1, gas path joint 24-2 and end socket 23 are located inside, are equipped with the via hole 26 passed through for pipeline in the middle part of the hood 25.
In order to generate high-speed jet, realize that injecting liquid drug, the cross-sectional area of the hydraulic piston 14 are less than air rammer 19
Cross-sectional area, be conducive to improve hydraulic medium pressure.Be conducive to reduce equipment size, be also beneficial to reduce driving air pressure.
More preferably, it increases stepper piston 5 and 2 diameter ratio of medical fluid push rod is also beneficial to reduce driving air pressure.
Working principle:
To composition active hydraulic cavities 13 after back-pressure sealing part 34 before hydraulic piston 14, back-pressure sealing part 34 extremely walks before
Driven hydraulic cavities 40 are constituted after into piston 5, active hydraulic cavities 13 are unidirectionally connected by back-pressure sealing part 34 with driven hydraulic cavities 40
It is logical, active hydraulic cavities 13 by one-way sealing ball element and low pressure oil way unilaterally connected, driven hydraulic cavities 40 by aerial drainage component with
Low pressure oil way cut-off or connection.
When injection, gas source is connected, high pressure gas is inputted by the air inlet 22-2 on end socket 23, due to magnet and inhales iron
The effect of the suction-combining force, when air pressure overcomes the suction-combining force, magnet with inhale iron separate, under gas pressure, promotion gas-liquid piston bar to
Preceding movement, while compression reseting spring 16, the air pneumatically sealed between hydraulic piston 14 are also compressed, and are piston reset
Power is provided；Liquid presses piston pole squeezes the hydraulic medium in active hydraulic cavities 13,13 pressure rise of active hydraulic cavities, hydraulic medium
It pushes back-pressure sealing part 34 open to enter driven hydraulic cavities 40 and then stepper piston 5 is pushed to move ahead, stepper piston 5 pushes medical fluid push rod 2
Realize one injection；
After single injection when repairing, liquid presses piston pole resets, the hydraulic medium in low pressure oil way push open one-way sealing blocking into
It becomes owner of hydrodynamic pressure chamber 13 and realizes repairing, back-pressure sealing part 34 is isolated by active hydraulic cavities 13 with driven hydraulic cavities 40 in oil replenishing process
To prevent stepper piston 5 from malfunctioning.Second of injection can be carried out, and so on, until 1 Chinese medicine liquid of cartridge has all been injected
At.
1 Chinese medicine liquid of cartridge is all after the completion of injection, and stepper piston 5 needs to reset using specific purpose tool, reseting procedure are as follows:
Specific purpose tool pressure aerial drainage component is connected to driven hydraulic cavities 40 with low pressure oil way, and it is driven that specific purpose tool pushes stepper piston 5 to make
Hydraulic medium in hydraulic cavities 40 flows back to low pressure oil way by aerial drainage component, and stepper piston 5, which is realized, to be resetted.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff
Various changes and amendments can be carried out without departing from the scope of the present invention completely.The technical scope of this invention is not
The content being confined on specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (14)
1. an a kind of powder charge multiple injection needleless injector, including medicine core component and propulsion assembly, the medicine core component connection
In the front end of propulsion assembly, storage and injection for medical fluid；The propulsion assembly is special for providing the power of injecting liquid drug
Sign is: the propulsion assembly includes active air pressure propulsion assembly and driven hydraulic drive component, and when injection, active air pressure is promoted
The power of component by driven hydraulic drive component pass to medicine core component medical fluid push rod realize injection, one injection complete and
Supplement hydraulic medium guarantees that active air pressure propulsion assembly power can be again by from hydrodynamic after active air pressure propulsion assembly resets
Pressure propulsion assembly passes to medical fluid push rod and realizes injection.
2. powder charge multiple injection needleless injector as described in claim 1, it is characterised in that: the driven hydraulic drive
Component include driven lumen (4), stepper piston component, hydraulic piston (14), driven hydraulic cavities (40), active hydraulic cavities (13),
Back pressure component, check valve assembly, aerial drainage component and low pressure oil way, the stepper piston component are arranged along axially slidable in institute
It states in driven hydraulic cavities (40), and is tightly connected with driven hydraulic cavities (40) inner wall, to back pressure component before hydraulic piston (14)
Active hydraulic cavities (13) are constituted later, constitute driven hydraulic cavities (40), active liquid later to stepper piston (5) before back pressure component
Press chamber (13) by back pressure component and driven hydraulic cavities (40) unilaterally connected, active hydraulic cavities (13) by check valve assembly with it is low
Pressure oil road unilaterally connected, driven hydraulic cavities (40) are ended or are connected to low pressure oil way by aerial drainage component.
3. powder charge multiple injection needleless injector as claimed in claim 2, it is characterised in that: the back pressure component setting
In guide rod chamber (37) between driven hydraulic cavities (40) and active hydraulic cavities (13), including back pressure spring (8), guide rod (36) and
Back-pressure sealing part (34), the back pressure spring (8) are set in the guide rod (36) front end, and are collectively disposed at the guide rod chamber (37)
Interior, the back-pressure sealing part (34) is arranged under the rear end of guide rod (36), free state, and the back pressure spring (8) makes described lead
Bar (36) and back-pressure sealing part (34) are against on the inlet of active hydraulic cavities (13) Xiang Congdong hydraulic cavities (40) feed liquor.
4. powder charge multiple injection needleless injector as claimed in claim 2, it is characterised in that: the stepper piston component
Including stepper piston (5) and for the sealing ring (6) and retaining ring (39) of stepper piston (5) and driven hydraulic cavities (40) sealing, institute
It states sealing ring (6) and retaining ring (39) ring is located on the sealing surface between stepper piston (5) and driven hydraulic cavities (40).
5. powder charge multiple injection needleless injector as claimed in claim 2, it is characterised in that: the check valve assembly packet
Valve seat (31), check valve plug (35), one-way sealing blocking (32) and check valve pressure spring (33) are included, is equipped with valve in the valve seat (31)
Chamber, the check valve plug (35), one-way sealing blocking (32) and check valve pressure spring (33) are arranged in valve chamber, and the check valve
Plug (35) one end is against the front end of valve chamber, and the other end is arranged check valve pressure spring (33), the check valve pressure spring (33) it is another
The one-way sealing blocking (32) held and valve chamber inlet is arranged in connects, when feed liquor, the liquid outlet of the valve chamber and the active
Hydraulic cavities (13) connection.
6. powder charge multiple injection needleless injector as claimed in claim 2, it is characterised in that: the aerial drainage component includes
The aerial drainage chamber (11) being arranged on valve seat (31), the aerial drainage chamber (11) is interior to be equipped with aerial drainage spool (9) and aerial drainage spring (12), institute
It states aerial drainage spool (9) one end connection aerial drainage spring (12) to be placed in aerial drainage chamber (11), aerial drainage spool (9) other end is outside
Extend aerial drainage chamber (11)；Aerial drainage runner (10) are offered on the aerial drainage spool (9), it is described to let out when being in bleed state
It flows runner (10) and is connected to the guide rod chamber (37) and aerial drainage chamber (11).
7. powder charge multiple injection needleless injector as claimed in claim 1 or 2, it is characterised in that: the active air pressure
Propulsion assembly includes the setting gas-liquid piston component internal in inner cylinder (15), is equipped with mutually isolated active in the inner cylinder (15)
Hydraulic cavities (13) and cylinder chamber, cylinder chamber include cylinder rod chamber (18) and cylinder rodless cavity, and the gas-liquid piston component includes
Gas-liquid piston bar, gas-liquid piston bar one end are equipped with air rammer (19), and the other end is equipped with hydraulic piston (14), described pneumatic
Piston (19) is arranged in the cylinder chamber, and is tightly connected with cylinder cavity wall, and the hydraulic piston (14) is arranged described
In active hydraulic cavities (13), and it is tightly connected with active hydraulic cavities (13) inner wall, the air rammer (19) and hydraulic piston
(14) can be mobile in cylinder chamber and the interior synchronous reciprocating of active hydraulic cavities (13) respectively, the cylinder of air rammer (19) rear end without
Rod cavity is connected to external air source, and the active hydraulic cavities (13) of hydraulic piston (14) front end are through back pressure component and guide rod chamber (37)
Connection.
8. powder charge multiple injection needleless injector as claimed in claim 7, it is characterised in that: the gas-liquid piston component
It further include dosage adjusting set (17), the dosage adjusting set (17) is fixed on the gas-liquid piston bar, described when free state
The distance of dosage adjusting set (17) front end face to cylinder rod chamber (18) front inner wall is the max die travel distance of gas-liquid piston bar.
9. powder charge multiple injection needleless injector as claimed in claim 7, it is characterised in that: the gas-liquid piston component
It further include reset spring (16), the reset spring (16) is set on gas-liquid piston bar, and both ends are gentle with cylinder chamber respectively
Piston (19) abuts.
10. powder charge multiple injection needleless injector as claimed in claim 7, it is characterised in that: the gas-liquid piston bar
For split settings, integrally connect including the pneumatic piston rod (28) with air rammer (19) integrally connected and with hydraulic piston (14)
The tail portion of the liquid presses piston pole (30) connect, pneumatic piston rod (28) and liquid presses piston pole (30) is connected with each other.
11. powder charge multiple injection needleless injector as claimed in claim 7, it is characterised in that: the hydraulic piston
(14) cross-sectional area is less than the cross-sectional area of air rammer (19).
12. powder charge multiple injection needleless injector as claimed in claim 2, it is characterised in that: further include sealing to be located to push away
It is used to connect the closing end component of external impetus gas source into component tail portion, the closing end component includes being sealedly connected on cylinder inner cylinder
(15) end socket (23) of rear end, the front end of the end socket (23) are equipped with the magnet with setting in the air rammer (19) rear end
(20) matched suction iron (21), the rear end of the end socket (23) are equipped with the oil inlet (22-1) being connected to low pressure oil way and are equipped with
The air inlet (22-2) being connected to cylinder rodless cavity, the oil inlet (22-1) connect external hydraulic by oil circuit connector (24-1)
Medium, the air inlet (22-2) connect external air source by gas path joint (24-2).
13. powder charge multiple injection needleless injector as claimed in claim 12, it is characterised in that: after the end socket (23)
End is additionally provided with hood (25), and air inlet (22-2) and end socket (23) are located inside, the hood (25) by the hood (25)
Middle part is equipped with the via hole (26) passed through for pipeline.
14. powder charge multiple injection needleless injector as described in claim 1, it is characterised in that: the medicine core component packet
Cartridge (1) and medical fluid push rod (2) are included, the cartridge (1) is removably attachable to the front end of driven lumen (4), the medicine
The setting of liquid push rod (2) one end is in cartridge (1), and the other end extends in the driven hydraulic cavities (40) of driven lumen (4), and institute
Stating medical fluid push rod (2) can the axial movement in cartridge (1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735673.4A CN110279914A (en) | 2019-08-09 | 2019-08-09 | Powder charge multiple injection needleless injector |
| PCT/CN2020/107894 WO2021027738A1 (en) | 2019-08-09 | 2020-08-07 | Single-charge multiple-injection needleless injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735673.4A CN110279914A (en) | 2019-08-09 | 2019-08-09 | Powder charge multiple injection needleless injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110279914A true CN110279914A (en) | 2019-09-27 |
Family
ID=68024963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910735673.4A Pending CN110279914A (en) | 2019-08-09 | 2019-08-09 | Powder charge multiple injection needleless injector |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110279914A (en) |
| WO (1) | WO2021027738A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111558113A (en) * | 2020-04-30 | 2020-08-21 | 北京快舒尔医疗技术有限公司 | Needleless injector body and needleless injector |
| CN111558112A (en) * | 2020-04-30 | 2020-08-21 | 北京快舒尔医疗技术有限公司 | Injection head of needleless injector, needleless injector body and needleless injector |
| WO2021027738A1 (en) * | 2019-08-09 | 2021-02-18 | Medical International Technologies (Mit China) Co., Ltd. | Single-charge multiple-injection needleless injector |
| CN113413516A (en) * | 2021-06-24 | 2021-09-21 | 江苏铂可医疗科技有限公司 | Needleless injector oil filling device and oil filling method thereof |
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| WO2021027738A1 (en) | 2021-02-18 |
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