CN110051909A - The needleless injector that can continuously inject - Google Patents
The needleless injector that can continuously inject Download PDFInfo
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- CN110051909A CN110051909A CN201910378425.9A CN201910378425A CN110051909A CN 110051909 A CN110051909 A CN 110051909A CN 201910378425 A CN201910378425 A CN 201910378425A CN 110051909 A CN110051909 A CN 110051909A
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- 238000002347 injection Methods 0.000 claims abstract description 176
- 239000007924 injection Substances 0.000 claims abstract description 176
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- 230000008569 process Effects 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 25
- 230000035939 shock Effects 0.000 claims description 9
- 230000005284 excitation Effects 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 4
- 238000000520 microinjection Methods 0.000 abstract description 64
- 230000000694 effects Effects 0.000 abstract description 12
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 abstract description 5
- 229940121657 clinical drug Drugs 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 47
- 229940079593 drug Drugs 0.000 description 42
- 238000010586 diagram Methods 0.000 description 17
- 230000002745 absorbent Effects 0.000 description 16
- 239000002250 absorbent Substances 0.000 description 16
- 238000010521 absorption reaction Methods 0.000 description 15
- 230000002045 lasting effect Effects 0.000 description 14
- 238000013461 design Methods 0.000 description 10
- 230000006872 improvement Effects 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 5
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- 230000008859 change Effects 0.000 description 4
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- 230000009471 action Effects 0.000 description 3
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- 238000009527 percussion Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
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- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 241000252254 Catostomidae Species 0.000 description 1
- 102000014150 Interferons Human genes 0.000 description 1
- 108010050904 Interferons Proteins 0.000 description 1
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- 208000014674 injury Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229940079322 interferon Drugs 0.000 description 1
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- 208000009146 rhinoscleroma Diseases 0.000 description 1
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Classifications
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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
- A61M5/30—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
- A61M5/31525—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
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention relates to medical instruments, a kind of needleless injector that can continuously inject is disclosed, by the terminal injecting assembly for implementing injection, the striker assembly for providing power for terminal injecting assembly, striker assembly can be driven back and forth to reach, and the circulation that the state of loading then is excited pulls component, driving circulation pulls the trigger component of component one-way circulation operation, the gun body that can be generated the negative-pressure adsorption component of suction-operated to body surface by striker assembly driving and provide support and running space for above-mentioned component is constituted.In clinical use, it can ensure that terminal injecting assembly front end and injection site keep suitable matching relationship by negative-pressure adsorption component, improve the successful validity of each micro-injection, realize the quantity control to injection point in entire injection process, and the ability to accept and penetrating power organized at injection site to medical fluid are significantly improved, substantially improve application effect of the needleless injector in the injection of large dosage of clinical drug.
Description
The present invention be submit on 03 20th, 2017 application No. is the divisions of 2017101648922 application for a patent for invention
Application.
Technical field
It fast can continuously be injected the present invention relates to a kind of medical instrument more particularly to one kind and realize drug bolus infusion
Needleless injector.
Background technique
Needleless injection is a kind of punctures without syringe needle and reaches drug injection purpose novel injection technology, and having can subtract
The pain and fear of few drug injection reduce bacterium infection risk, avoid syringe needle from the generations of accidents such as scratching and fracture, drug
It absorbs fastly, many advantages, such as subcutaneously not playing scleroma and high injection efficiency is used for a long time, and then have in future clinical medical treatment
Broad application prospect.But the pre- preceding operation before traditional needleless injector per injection is relatively complicated, time-consuming and laborious, can not
Continuity injection is efficiently carried out, and injection dosage is made to become the short slab of existing needleless injector, can typically be only used to pancreas islet
The low dose of clinical injection of the drugs such as element, and it is not used to the clinical injection of the drugs such as the slightly larger antibiotic of dosage, interferon, this
Reason hinders needleless injector in the widespread adoption in clinical injection field.
Application No. is 2016109677793 patents of invention to disclose a kind of needleless injector, by gun body, percussion hammer group
Part, circulation pull component, trigger component and terminal injecting assembly and constitute, and circulation can be driven to pull component by trigger component unidirectional
Circular flow, and recycle pull component circular flow during can drive striker assembly efficiently gradually reciprocal completion " loading "
It is acted with " excitation ", and terminal injecting assembly is made to realize multiple micro-injection in a short time, pass through the tired of multiple micro-injection
Add the large bolus injection for realizing drug, which overcome the deficiencies of previous traditional product, have expanded needleless injector in clinic
The application range in drug injection field, and then have broad application prospects.
It is by the more of drug disclosed in the patent of invention application No. is 2016109677793 in needleless injector
Secondary micro-injection is cumulative and realizes the large bolus injection of drug, therefore it has centainly on operation requires compared with traditional needle-free injectors
Difference, be mainly manifested in: in entire injection process, must guarantee that each micro-injection is effectively successfully not so final medicine
The injection dosage of object is can not be specific, can not accurately realize the drug injection of preset dose, while also resulting in certain medicine
Object waste；Thus the injection point quantity of multiple micro-injection should enter human body to be preferred less to reduce extraneous bacterium with medical fluid
Risk improves the aseptic and safety of Needleless injection；In injection process, it should improve to greatest extent and be organized at injection site
Slackness, organize to improve facing for drug Needleless injection to the ability to accept and penetrating power of drug at injection site to improve
Bed effect.But used by the above-mentioned needleless injector at present for structure, during clinical manipulation, technology above-mentioned is wanted
Seeking Truth is difficult to realize comprehensively, or even there are contradictory.Such as: it 1. wants to guarantee that each micro-injection is effectively successfully, to need to protect
Terminal injecting assembly front end tends to be vertical with body surface and is in close contact when demonstrate,proving each micro-injection, but due to the needleless injector
Action of injection be to be excited by the movement of cocking, in cocking, needleless injector is swung unavoidably, make
The contact condition for obtaining terminal injecting assembly front end and body surface is difficult to ensure, that is, realizes that each micro-injection is effectively successfully to have one
Determine difficulty, is that there is higher operation requirement；2. theoretically the injection point quantity of multiple micro-injection to be preferred less, but the nothing
Needle injection load movement and excitation movement is realized by the movement of cocking, load and excitation process in
It is difficult to ensure that terminal injecting assembly front end remains constant with body surface relative position, needleless injector is not when cocking in addition
Exempt to swing, it is difficult to realize for being overlapped the injection point of multiple micro-injection, or even in actual clinical operation, often often
The injection point of secondary micro-injection is different from, and is increased extraneous bacterium with medical fluid and is entered intracorporal approach；3. improving injection site
The slackness of place's tissue can be improved Needleless injection effect, but the needleless injector and other previous products are in clinical manipulation, such as
Shown in Fig. 1, terminal injecting assembly 2 must apply biggish pressure to body surface can guarantee front end and the body of terminal injecting assembly 2
The close contact of table, so that being pressurized under injection site and forming the dense region 1 that a tissue density significantly increases, since this is closely knit
The presence in region 1, so that organizing to significantly reduce the ability to accept and penetrating power of medical fluid at injection site；At the same time, often
Tightly the contacting of 2 front end of terminal injecting assembly and injection site, terminal injecting assembly 2 in multiple micro-injection when secondary micro-injection
The constant holding of front end and injection site relative position, this two o'clock technical requirements can be by increasing by 2 front end of terminal injecting assembly
Supporting pressure and improve to injection site, it is clear that can not be simultaneously with the technical requirements for improving the slackness organized at injection site
It realizes, but has contradictory.
Summary of the invention
The purpose of the present invention is to provide one kind to realize drug bolus by efficiently continuous several times micro-injection
Needleless injection, and can guarantee that each micro-injection success is effective, the injection point of multiple micro-injection can rationally be controlled, it can
Improve the slackness organized at injection site, the final Needleless injection for improving drug bolus infusion effect in injection process
Device.
Another object of the present invention is to provide a kind of needleless injector that can continuously inject it is efficient, efficiently operate
Method makes it realize best Needleless injection effect in clinical application.
To realize the above-mentioned technical purpose, the present invention adopts the following technical scheme:
A kind of needleless injector that can continuously inject comprising:
Gun body is made of the gun rack and gun barrel being fixedly connected, and cylindrical bore is equipped in gun barrel, is set on the upside of bore
There is the guide groove for piercing gun barrel upper side wall；
Striker assembly comprising one is located at the hammer body in bore and being axially movable, and hammer body front end is equipped with small compared with its diameter
Tup, upside is fixed with the guide block that extends in guide groove and can slide along guide groove；Hammer body, which persistently moves backward, will make percussion hammer group
Part carries out accumulation of energy and reaches the state of loading, and after striker assembly excitation, hammer body is quick by the energy stored by striker assembly driving
Forward makes tup generate shock to front component；
Circulation pulls component, be placed in gun body and only can one-way circulation operating, during cycle operation, will drive
The state of loading that reaches for keeping striker assembly reciprocal is then excited, and recycles striker assembly with this, and gradually to front part
Part generates shock；
Trigger component is supported by gun body, taking human as external force as inputting, is unidirectionally followed for driving circulation to pull component
Ring operating；
Terminal injecting assembly, front end are equipped with injection orifice, and inside is equipped with injection ram, drives injection ram is mobile to push away
Bar, a combination thereof gun barrel front end and push rod tail end extend in bore, push rod tail end is used to cater to the shock of tup to drive
Injection ram Forward makes terminal injecting assembly implementing injection, can realize injection by adjusting the length that push rod tail end protrudes into bore
Dosage is preset；
Negative-pressure adsorption component, is made of negative pressure device and sucker；Negative pressure device includes a negative pressure cylinder, and negative pressure cylinder is fixed on
On the upside of gun barrel and parallel with hammer body, the front end of negative pressure cylinder is suction end, and rear end is communicated with atmosphere, and it is living that negative pressure is equipped in negative pressure cylinder
Reset spring, the pull rod that moves back of traction negative pressure piston filled in, negative pressure piston is driven to move forward, the rear end of pull rod extends to negative pressure cylinder
Rear；The rear end of pull rod is fixed with a connecting lever for extending in guide groove and being located at guide block rear and leads when guide block is contacted with connecting lever
Block moves backward and can drag connecting lever and move back with it, and guide block is moved forward then constitute connecting lever and be drawn；Sucker by installation set and
Disk body is constituted, and installation set can be tightly nested with outside terminal injecting assembly, and guarantee disk body and terminal injecting assembly center overlapping of axles
And disk body front end face is located on front side of injection orifice；Sucker is equipped with an exhaust end, suction of the exhaust end through negative pressure line and negative pressure cylinder
The connection of gas end；A safety valve for preventing negative pressure excessive is installed in negative pressure channel between negative pressure cylinder and sucker.
The operating method of the above-mentioned needleless injector that can continuously inject are as follows:
1) injection dosage is default:
The syntagmatic of terminal injecting assembly and gun body is adjusted, i.e., completion injection dosage is default；
2) disinfection treatment before injection:
The body surface of injection site and peripheral region to patient carries out disinfection processing；
3) continuous several times micro-injection:
It combines sucker with terminal injecting assembly, holds gun body, buckle sucker at the injection site periphery on body surface, and
Ensure that terminal injecting assembly front end is supported with injection site, driving trigger component operation, hammer body drives negative pressure during moving back
Piston moves back, and striker assembly is gradually realized when loading state, sucker to the absorption of body surface reach best and drive injection site with
Terminal injecting assembly front end tightly contacts；Hand-held gun body is slightly outer to move, and so that the tissue at injection site is tended to Shu Chi, continues to drive
Trigger component excites striker assembly, and terminal injecting assembly completes a micro-injection；After striker assembly is excited, in sucker
Negative pressure gradually weaken, injection site stress is able to alleviate and tissue at this is enable to relax；Continue to drive trigger component, hammer body
It will move back again, when the negative pressure in sucker does not completely disappear, the negative pressure in sucker is gradually increased, and is realized again to striker assembly
After state of loading, injection site is realized again with terminal injecting assembly front end and is tightly contacted, and is carried out for micro-injection next time
Prepare；Thus the multiple micro-injection of carry out reciprocally；
4) injection point is replaced:
After completing a micro-injection, it is not eager that trigger component is driven to run, makes hammer body temporal persistence before bore
Portion disappears after losing suction-operated to body surface after the negative pressure in sucker, adjusts terminal injecting assembly front end and injection site
Then relative position carries out micro-injection next time again；
5) drug injection finishes:
After drug injection to preset dose, no longer the operation of driving trigger component, hammer body rest on the front of bore,
Negative pressure in sucker gradually weakens up to not having suction-operated to body surface, and needleless injector is being removed, that is, is being completed entire
Injection operation.
Furthermore, the outer wall of the terminal injecting assembly front end be equipped with one in a ring evagination and be used to limit
The limited step of installation set back-end location.
Furthermore, the installation set is equipped with plurality of specifications according to internal diameter difference, and each installation set can be with disk
Body tightly combines.
Furthermore, the safety valve includes a valve body, is provided with valve chamber in valve body, valve chamber through one with valve opening every
Plate is separated into upper chamber and lower room, and upper chamber is communicated with atmosphere, and lower room is then only communicated with the negative pressure channel of negative-pressure adsorption component；Lower interior
Be fixed with the lower magnetic pole upwardly extended across valve opening equipped with a valve block moving up and down, on the upside of valve block, be provided on valve block by
Its eccentric orfice pierced up and down；Valve body is equipped with the screw rod fixed once screw hole, and the lower end of screw rod extends to indoor and fixed
There is upper magnetic post, upper end is fixedly connected with the knob being located at outside valve body, screw rod, upper magnetic post and lower magnetic pole three center overlapping of axles, and
Upper magnetic post is located above lower magnetic pole；When lower room negative pressure is not more than safety value, upper magnetic post drives valve block to be close to the gravitation of lower magnetic pole
Annular partition, valve opening and eccentric orfice are blocked and upper chamber and lower room are made to be in off state；When lower room negative pressure is greater than safety value,
Valve block overcomes the gravitation of upper magnetic post and lower magnetic pole and moves down, and upper chamber and lower room are in connected state；Valve body is separately fixed with one
It is used to limit the spacer pin of valve block downstream position below valve block.
Furthermore, the back end of tie rod is fixed with a conical head, and the rear of pull rod is equipped with a device for clamping；Clamping
It is equipped in device for conical head insertion and by the locking hole of conical head locking, is used to release the releasing button locked to conical head,
Device for clamping tail end can front and back rotation by a support hinged support；Device for clamping can rotate to forward flattened state, work as percussion hammer
After component is in state of loading, conical head is inserted into locking hole just and is locked by device for clamping, and device for clamping is rotatable backward
To state is started, after striker assembly, which is in, loads state, conical head is not contacted with device for clamping generation；
Furthermore, one is equipped in device for clamping can be up and down and the tongue piece that blocks locking hole, sets on the downside of tongue piece
There is the elastic slice for driving it to reset upwards, upside then connect with releasing button through pressing lever, is provided on tongue piece and passes through for conical head
Holding hole can penetrate in holding hole and be driven under tongue piece by tapered surface when conical head moves backward in locking hole
It moves, when conical head is fully located at tongue piece rear, tongue piece is driven by elastic slice and is moved up, conical head is then locked in rear side,
After such as driving tongue piece to move down using releasing button, holding hole, which constitutes the axial movement no longer to conical head, to be hindered, and is realized with this
Release the locking to conical head；
Furthermore, the support of support is provided for device for clamping and negative pressure cylinder uses a removable seat installation to fix jointly
In the upside of gun barrel.
Furthermore, the gun barrel be fixedly arranged above one be located at negative pressure cylinder rear locking cylinder, locking cylinder front end with
Atmosphere communicates, and rear end is equipped with bottom, intracavitary to be equipped with lockup piston, locking rod and tie rod end of the lockup piston through extending forward
It is fixedly connected；Locking cylinder, lockup piston, locking rod and pull rod center overlapping of axles；Locking cylinder bottom is equipped with one-way exhaust mouth
And air inlet, air inlet are connected through an air delivering pipeline with intake valve；Air delivering pipeline is communicated with the atmosphere when intake valve is open state,
Air delivering pipeline is not communicated with atmosphere when intake valve is in off state；Intake valve is installed in gun body, only in the medicine of preset dose
Object is opened after injecting, and is converted to off state before striker assembly next time reaches the state of loading；Air inlet separately passes through
Bypass conduit is communicated with the atmosphere, and bypass line is equipped with the switch valve that switchable and flow is adjusted；
Furthermore, the plunger cavity communicated with atmosphere in the intake valve equipped with cylindrical and both ends, plunger cavity
The interior plunger for being equipped with tight cooperate and being axially movable, plunger cavity side are equipped with the gas outlet being connected with air delivering pipeline；Work as plunger
When positioned at its stroke rearmost end, gas outlet is blocked by plunger and is in close state intake valve, when plunger is moved rearwardly into out
Air inlet valve position is in connected state when port is connected to plunger cavity；The valve rod for driving and moving it, valve rod rear end are connected on rear side of plunger
Positioned at the rear of valve body；Intake valve is located at the front side of bore by gun body support and is located at the one of the push rod of terminal injecting assembly
Side, valve rod is parallel with the central axis of both hammer bodies, and when intake valve is in close state, the rear end of valve rod is located in bore, works as valve
Intake valve is converted to open state just when the rear end of bar is hit by tup and exits bore completely；One elasticity of rear end of valve rod
Bracing wire is connect with hammer body front end, and before striker assembly reaches the state of loading, hammer body, which can draw valve rod and move back, converts intake valve
It is in off state；Flexible pull wire is located at tup side, and the two is parallel.
Furthermore, in the negative-pressure adsorption component, it is unidirectional that one is also connected between safety valve and exhaust end pipeline
Exhaust pipe is successively arranged on the unidirectional exhaust pipe from the front to the back and controls the pressure release that state is communicated with the atmosphere in unidirectional exhaust pipe
Valve, only allows unidirectional exhaust pipe hollow at the breather cheek valve for only air being allowed to convey from the front to the back in unidirectional exhaust pipe
Gas drains into extraneous exhaust check valve；Negative pressure line is equipped with a switching valve with connection, cut-off two states, and switching valve connects
When logical, negative pressure line is on state, and when switching valve cut-off, negative pressure line is in cut-off and makes negative pressure cylinder through safety valve and list
Sucker generation is acted on to exhaust pipe.
The present invention is compared with conventional art, has the following beneficial effects: that this needleless injector compares previous product, no
Only can carry out continuous several times micro-injection quickly and efficiently and realize the large bolus injection of drug, and it has additional negative-pressure adsorption group
Part, during hammer body moves back, sucker can gradually be adsorbed the body surface at injection site, be in every time in striker assembly
When state of loading, sucker all has optimal adsorption effect to body surface at injection site, in hand-held needleless injector operating process
In, even if needleless injector shakes, still it can guarantee before each micro-injection, the front end of terminal injecting assembly and injection part
The tight contact in position, improves the successful validity of each micro-injection to greatest extent；When being carried out continuously multiple micro-injection,
Multiple micro-injection can be carried out in same injection point, can also easily replace injection point as needed, it is repeatedly micro- to be conducive to reduction
The injection point quantity of injection is measured, extraneous bacterium is reduced and enters intracorporal approach, improve the safety of large dosage of drug Needleless injection；
This needleless injector is in clinical application, the close contact of terminal injecting assembly front end and injection site, mainly relies on sucker
The suction-operated of body surface at injection site is achieved, thus terminal injecting assembly end be not necessarily to apply injection site it is too big
Pressure, injection site pressure is smaller and more balanced, and tissue not will form dense region on the downside of injection site, in addition every
Before secondary micro-injection, hand-holdable gun body is slightly outer to be moved, and alleviates terminal injecting assembly and supports pressure to injection site, can be into one
Step improves the Shu Chi degree organized at injection site, greatly improves the ability to accept and infiltration organized at injection site to medical fluid
Saturating ability, large dosage of Needleless injection for drug are great meanings；In addition, since this needleless injector is in use process
In, absorbent module can ensure that terminal injecting assembly keeps good with injection site and tightly contacts, excessive without operator
Divert one's attention to pay close attention to, so investment " loading " that can be physical and mental and " excitation " etc. other operation in so that operation be more easier, efficiency
It is higher；Absorbent module is driven without configuring dedicated power device to drive by striker assembly, and striker assembly is this
Needleless injector realizes the basic components of basic function, thus substantially increases the utilization rate of needleless injector basic components,
The overall cost that needleless injector product is reasonably reduced on definite meaning, improves cost performance.
Detailed description of the invention
Fig. 1 is the mated condition figure of terminal injecting assembly and injection site when existing needleless injector uses.
Fig. 2 is one of the appearance diagram of needleless injector in embodiment 1.
Fig. 3 is two of the appearance diagram of needleless injector in embodiment 1.
Fig. 4 is one of the schematic diagram of internal structure of needleless injector in embodiment 1.
Fig. 5 is two of the schematic diagram of internal structure of needleless injector in embodiment 1.
Fig. 6 is the structural schematic diagram of negative-pressure adsorption component in embodiment 1.
Fig. 7 is state diagram of the needleless injector when negative pressure device initially exports negative pressure in embodiment 1.
Fig. 8 reaches state diagram when loading state in striker assembly for needleless injector in embodiment 1.
Fig. 9 is the mated condition figure of terminal injecting assembly and injection site when needleless injector uses in embodiment 1.
Figure 10 is the cooperation schematic diagram of sucker and terminal injecting assembly in embodiment 1.
Figure 11 is one of the structural schematic diagram of safety valve in embodiment 2.
Figure 12 is the second structural representation of safety valve in embodiment 2.
Figure 13 is status diagram of the needleless injector under " Batch Adsorption " operating mode in embodiment 3.
Figure 14 is status diagram of the needleless injector under " lasting absorption " operating mode in embodiment 3.
Figure 15 is one of cross-sectional view when device for clamping locks conical head in embodiment 3.
Figure 16 is two of cross-sectional view when device for clamping locks conical head in embodiment 3.
Figure 17 is the schematic diagram that device for clamping and negative pressure cylinder share same removable seat in embodiment 3.
Figure 18 is status diagram of the needleless injector when lockup piston locks negative pressure piston in embodiment 4.
Figure 19 is that needleless injector is released in lockup piston to the status diagram after negative pressure piston locking in embodiment 4.
Figure 20 is intake valve structural schematic diagram in the off state in embodiment 5.
Figure 21 is structural schematic diagram when intake valve is in the open state in embodiment 5.
Figure 22 is the structural schematic diagram of needleless injector in embodiment 6.
In figure, 1, terminal injecting assembly, 2, dense region, 3, disk body, 4, installation set, 5, negative pressure line, 6, safety valve, 7,
Removable seat, 8, negative pressure cylinder, 9, pull rod, 10, connecting lever, 11, gun rack, 12, trigger component, 13, guide block, 14, guide groove, 15, gun barrel,
16, injection orifice, 17, push rod, 18, bore, 19, hammer body, 20, tup, 21, circulation dragging component, 22, negative pressure piston, 23, reset
Spring, 24, limited step, 25, lower room, 26, partition, 27, valve opening, 28, lower magnetic pole, 29, upper magnetic post, 30, screw rod, 31, knob,
32, upper chamber, 33, eccentric orfice, 34, valve block, 35, valve body, 36, spacer pin, 37, conical head, 38, locking hole, 39, device for clamping,
40, releasing button, 41, support, 42, pressing lever, 43, holding hole, 44, elastic slice, 45, tongue piece, 46, intake valve, 47, appendix
Road, 48, locking cylinder, 49, locking rod, 50, lockup piston, 51, air inlet, 52, switch valve, 53, one-way exhaust mouth, 54, elasticity
Bracing wire, 55, plunger cavity, 56, plunger, 57, gas outlet, 58, valve rod, 59, unidirectional exhaust pipe, 60, relief valve, 61, air-breathing list
To valve, 62, exhaust check valve, 63, switching valve.
Specific embodiment
Embodiment 1
Referring to shown in Fig. 2,3,4,5, the needleless injector that one kind disclosed by the invention can be injected continuously by gun body, is hit
Hammer component into shape, circulation pulls component 21, trigger component 12, terminal injecting assembly 1 and six major part of negative-pressure adsorption component are constituted；
Wherein, referring to shown in Fig. 2,3,4, the gun body is made of the gun rack 11 being fixedly connected with gun barrel 15, gun barrel 15
Interior to be equipped with cylindrical bore 18, the upside of bore 18 is equipped with the guide groove 14 for piercing 15 upper side wall of gun barrel；Gun body is used to be it
His component provides support and running space, and structure should have convenient for hand-held characteristic；
Wherein, referring to shown in Fig. 4,5, the striker assembly includes a hammer body for being located at that bore 18 is interior and is axially movable
19,19 front end of hammer body is equipped with the tup 20 small compared with its diameter, is fixed on the upside of hammer body 19 and extends in guide groove 14 and can be along guide groove
The guide block 13 of 14 slidings；Hammer body 19, which persistently moves backward, will make striker assembly carry out accumulation of energy and reach the state of loading, striker assembly
After excitation, the energy stored by striker assembly is driven and is quickly moved forward by hammer body 19, and 20 pairs of front components of tup is made to generate shock；
Wherein, referring to shown in Fig. 4,5, the circulation pulls component 21 and is placed in gun body, only can one-way circulation fortune
Turn, circulation pulls component 21 during cycle operation, and the state of loading that reaches for driving striker assembly reciprocal is then swashed
Hair, recycles striker assembly with this, and generating to front component gradually is hit；
Wherein, referring to shown in Fig. 2,3, the trigger component 12 is supported by gun body, taking human as external force as inputting, is used
It is recycled in driving and pulls the operating of 21 one-way circulation of component；
Wherein, referring to shown in Fig. 4,5,1 front end of terminal injecting assembly is equipped with injection orifice 16, and inside is equipped with injection and lives
The mobile push rod 17 of plug, driving injection ram；End injecting assembly combination gun barrel 15 front end and 17 tail end of push rod extend to rifle
In thorax 18,17 tail end of push rod is used to cater to the shock of tup 20 to drive injection ram Forward that terminal injecting assembly 1 is made to implement note
It penetrates, can realize the default of injection dosage by adjusting the length that 17 tail end of push rod protrudes into bore 18；
Wherein, referring to Fig. 3, shown in 5,6, the negative-pressure adsorption component is made of negative pressure device and sucker；Negative pressure device
Including a negative pressure cylinder 8, which is fixed on the upside of gun barrel 15 and parallel with hammer body 19, and the front end of negative pressure cylinder 8 is air-breathing
End, rear end are communicated with atmosphere, the reset bullet for being equipped with negative pressure piston 22 in negative pressure cylinder 8, negative pressure piston 22 being driven to move to front end
The pull rod 9 that spring 23, traction negative pressure piston 22 move back, the rear end of pull rod 9 extend to the rear of negative pressure cylinder 8, and negative pressure cylinder 8, negative pressure are living
The center overlapping of axles of plug 22 and 9 three of pull rod；The rear end of pull rod 9 is fixed with one and extends in guide groove 14 and be located at 13 rear of guide block
Connecting lever 10；When guide block 13 and connecting lever 10 contact, if guide block 13 is such as moved backward with hammer body 19, it is same with it that connecting lever 10 can be dragged
Step moves backward, until striker assembly reaches the state of loading, it, will not be to 10 structure of connecting lever if guide block 13 is moved forward with hammer body 19
At traction；Sucker is made of installation set 4 and disk body 3, and installation set 4 can be tightly nested with outside terminal injecting assembly 1, and guarantee disk body
3 are located at 16 front side of injection orifice with 1 center overlapping of axles of terminal injecting assembly and 3 front end face of disk body；Sucker is equipped with an exhaust end, should
Exhaust end is connected to through negative pressure line 5 with the suction end of negative pressure cylinder 8；One is installed in negative pressure channel between negative pressure cylinder 8 and sucker
Prevent the safety valve that negative pressure is excessive；For the ease of the installation and removal of absorbent module, negative pressure cylinder 8 can be installed solid through a removable seat 7
Due to the upside of gun barrel 15.
Referring to shown in Fig. 4-9, the working principle and operating method of the above-mentioned needleless injector that can continuously inject are as follows:
Adjusting the syntagmatic of terminal injecting assembly 1 and gun body, i.e. adjusting 17 tail end of push rod protrudes into the length in bore 18,
The default of injection dosage is completed according to clinical needs；The body surface at injection site and peripheral region to patient carries out disinfection place
Reason；Sucker is combined in the front end of terminal injecting assembly 1, gun body is held, sucker is made to buckle the body surface at injection site periphery
And ensure that 1 front end of terminal injecting assembly is supported with injection site, it drives circulation to pull component 21 by trigger component 12 and operates, follow
Ring pulls the traction hammer body 19 of component 21 and moves backward, after hammer body 19 is moved rearwardly into guide block 13 and connecting lever 10 is supported, connecting lever 10,
Pull rod 9 and negative pressure piston 22, which synchronize collective with hammer body 19, to be moved backward, during negative pressure piston 22 moves backward, negative pressure
Negative pressure is generated in cylinder 8 and gradually extracts the air among sucker out, and when striker assembly reaches and loads state, sucker will be to body surface
Suction-operated it is best and injection site is driven tightly to contact with 1 front end of terminal injecting assembly；Hand-held gun body is slightly outer to move, and alleviates
Terminal injecting assembly 1 supports pressure to injection site, so that the tissue at injection site is tended to Shu Chi state, continues with trigger
Component 12 drives circulation to pull component 21 and runs, and striker assembly is excited, and hammer body 19 quickly moves forward and makes tup 20 to push rod 17
Tail end implement hit, push rod 17 drive injection ram Forward, promote terminal injecting assembly 1 complete a micro-injection；When hitting
After hammer component is excited, guide block 13 moves forward with hammer body 19, and no longer causes to fetter to connecting lever 10, and negative pressure piston 22 is in reset spring
Start to move forward at a slow speed under the action of 23, the negative pressure in sucker weakens, and the stress of injection site and peripheral region is able to alleviate and make
Tissue is relaxed, and the continuation of trigger component 12 is driven, and hammer body 19 will move back again, and the negative pressure in sucker does not completely disappear i.e.
When 1 front end of terminal injecting assembly and injection site relative position do not change, connecting lever 10 is dragged by guide block 13 backward again, is inhaled
Negative pressure in disk is gradually increased, and after striker assembly realizes state of loading again, injection site and 1 front end of terminal injecting assembly are again
The secondary tight contact of realization, is ready for micro-injection next time；Thus the multiple micro-injection of carry out reciprocally, to multiple
Drug micro-injection and after realizing the drug injection of preset dose, no longer driving trigger component 12 is run, and hammer body 19 stops at this time
In the front of bore 18, guide block 13 does not cause obstacle to the movement of connecting lever 10, and negative pressure piston 22 is under the action of reset spring 23
And move forward and reset, until the forefront of negative pressure cylinder 8 is reached, and the negative pressure in sucker weakens therewith until disappearing, thus no longer right
Body surface at injection site has suction-operated, and needleless injector is removed, that is, completes entire injection operation.
Referring to shown in Fig. 6,7, when clinic carries out drug injection, the injection point quantity of multiple micro-injection to be preferred less,
But if needing the drug dose injected larger, it is single carry out injection in an injection point will obviously be beyond the local organization to medicine
The receiving ability of object is unable to reach expected drug injection effect, it is necessary to according to drug agent during multiple micro-injection
Amount number and combine patient individual instances carry out replacement injection point；At this point, only need to be not anxious after completing a micro-injection
It is run in driving trigger component 12, makes 19 temporal persistence of hammer body in the front of bore 18, be reset to negative pressure cylinder 8 to negative pressure piston 22
Forefront, i.e., negative pressure in sucker disappears after losing suction-operated to body surface, adjusts 1 front end of terminal injecting assembly and injection
Then the relative position at position drives trigger component 12 to run again, carry out micro-injection next time, thus can realize flexible replacement
The operation requirement of injection point.
Referring to shown in Fig. 6,7, when clinic carries out drug injection, during each micro-injection, such as 8 air-breathing of negative pressure cylinder
Hold the negative pressure of output excessive, safety valve 6 will be opened, and outside air will enter negative between negative pressure cylinder 8 and sucker through safety valve 6
In pressure passageway, negative pressure is maintained in the safety value of setting, the avoidable sucker of one side is excessive to the adsorption capacity of body surface and gives and suffers from
Person causes uncomfortable or injury, on the other hand can avoid that negative pressure is excessive to be caused to damage to components such as negative pressure cylinder 8, negative pressure line 5, suckers
Evil.
In clinical use, this needleless injector because can progress rapidly and efficiently continuously inject, and then can be used for a large amount of medicines
The Needleless injection of object operates, but not limited to this, it is also applied for the Needleless injection operation of trace drug；Such as in clinical manipulation
It without repeatedly continuous injection, or need to continuously inject but operator's experience is relatively abundanter, thus can not be carried out by absorbent module
Absorbent module entirety can be separated from needleless injector at this time, keep needleless injector lighter and handier, operation is more by Needleless injection
It is laborsaving.
Referring to shown in Fig. 4,5, in the above-mentioned needleless injector that can continuously inject, gun body, striker assembly, circulation are pulled
The specific structure and mutual matching relationship of component 21, trigger component 12 and terminal injecting assembly 1, how is striker assembly
It completes energy accumulation by loading, how by exciting to realize the quick Forward of hammer body 19, how circulation pulls component 21
Logical cycle operation drives striker assembly is reciprocal to be loaded and excited, and how trigger component 12 to drive using external force as inputting
Dynamic circulation pulls the operating of 21 one-way circulation of component, and how terminal injecting assembly 1 provides power by striker assembly and carry out micro note
It penetrates, these structures such as default for how realizing injection dosage and mechanism are application No. is 2016109677793 patent of invention institutes
Have description in detail in a kind of disclosed needleless injector, is the prior art, therefore repeats no more in the present invention.
Referring to shown in Fig. 6,7,8, in the above-mentioned needleless injector that can continuously inject, negative pressure is filled in negative-pressure adsorption component
The size and installation site set have certain technical requirements, such as:
1. striker assembly reaches when loading state, negative pressure piston 22 should be located at the middle and back of negative pressure cylinder 8, thereby guarantee that every time
Negative pressure device is in negative pressure output state before micro-injection；
After 2. striker assembly excites and terminal injecting assembly 1 is driven to complete a micro-injection, if not to trigger component 12
It is operated, hammer body 19 rests on the front of bore 18 at this time, and negative pressure piston 22 can be driven by reset spring 23 and is reset to negative
Thus the front end of pressure cylinder 8 can guarantee after the completion of each micro-injection, such as carry out the operation of micro-injection next time not in time,
Then the negative pressure in negative-pressure adsorption component will disappear, and sucker no longer has suction-operated to body surface；
3. when negative pressure piston 22 is located at 8 front end of negative pressure cylinder, reset spring 23 should still in non-the fully extended state, when
Striker assembly reaches when loading state, and reset spring 23 should still be not in complete compressive state, thereby guarantee that reset spring 23
Elastic extension range can meet the stroke needs of negative pressure piston 22；
And for 3 above-mentioned technical requirements, during the manufacturing of this needleless injector, to negative pressure cylinder 8, draw
The parameters such as the size of bar 9 and reset spring 23, coefficient of elasticity are calculated, and by the relative mounting location of negative pressure device and gun body
It is adjusted, is easily achieved, and without paying creative labor.
It,, need to be according to operation need in clinical manipulation in the above-mentioned needleless injector that can continuously inject referring to shown in Figure 10
It wants and sucker is combined or is dismantled with terminal injecting assembly 1, it, can in order to guarantee that the two can efficiently be combined connection
Be equipped on the outer wall of 1 front end of terminal injecting assembly one in a ring evagination and be used to limit the limit of 4 back-end location of installation set
Installation set 4 need to be only nested with from the front to the back in 1 front end of terminal injecting assembly by step 24, when combination, then push installation set backward
4, after it is supported with limited step 24, that is, completes sucker and connect with the combination of terminal injecting assembly 1.
At the same time, it is contemplated that when clinical manipulation, need to tightly be combined sucker with terminal injecting assembly 1, therefore installed
Set 4 should have matching with terminal injecting assembly 1, and terminal injecting assembly 1 may be set according to the outer diameter difference of its front end
There are many specifications, therefore in the present invention, sucker has plurality of specifications, the suction of different size according to the difference of 4 internal diameter of installation set
Disk matches one by one with the terminal injecting assembly 1 of different size；
If will definitely increase product it is also contemplated that the sucker of each specification is made of installation set 4 and disk body 3 simultaneously
Whole acquisition cost, therefore sucker and installation set 4 can be used Combination Design, i.e. installation set 4 is different according to internal diameter and be equipped with a variety of
Specification, each installation set 4 can tightly be combined with disk body 3；Generally, due to which sucker can't during clinical manipulation
It is directly contacted with injection point, therefore it is used multiple times, and after Combination Design can be used with installation set 4 such as sucker, can also adopt disk body 3
It is made of disposable material, timely replacement disk body 3 can be needed to be fabricated to since 3 structure of disk body is simple according to clinical safety health
This is cheap, and excessive influence can't be constituted to the use cost of needleless injector.
Referring to shown in Fig. 9, above structure is used based on the needleless injector that can continuously inject, by negative-pressure adsorption component
, it can be achieved that when each micro-injection, 1 front end of terminal injecting assembly and injection site are in close contact, it is ensured that every for the function that is had
Secondary micro-injection success is effective, realizes the accurate control of final injection dosage；During multiple micro-injection, it can come as needed
The relative position for maintaining or converting terminal injecting assembly 1 front end and injection site, can flexibly control injection point, can infuse
Injection point quantity is reduced during penetrating to greatest extent, reduces the risk that extraneous bacterium enters human body；1 front end of terminal injecting assembly
Close contact with injection site relies primarily on sucker and is realized to the suction-operated of body surface, and the tissue at injection site can't
By the too big pressure that supports, forced area is big, and stress is smaller and balanced, not will form dense region on the downside of injection site, protects
It has demonstrate,proved and has organized absorption of drugs and penetrating power at injection site, improved the clinical effectiveness of drug Needleless injection；Clinic behaviour
In work, when completing first micro-injection, 1 front end of terminal injecting assembly and injection site have established suitable relativeness, after
In continuous micro-injection operation, no longer need to carry out excessive concern to the relativeness of terminal injecting assembly 1 and injection site, into
And can be physical and mental investment other operation in, reduce operation difficulty, improve medical efficiency.
Embodiment 2
In the needleless injector that can continuously inject disclosed in the embodiment 1, as shown in fig. 6, between negative pressure cylinder 8 and sucker
Safety valve 6 is installed in negative pressure channel, when the negative pressure among negative pressure channel is excessive, unlatching is made outside air by safety valve 6
Enter in pressure passageway in right amount, makes the negative pressure in negative pressure channel not higher than preset safety value, be no lack of has realization in the prior art
The safety valve 6 of this function occurs, but this kind of safety valve 6 mostly haves the defects that certain, for example spool generallys use spring
Driving resets, and sensitivity is poor, and accuracy is lower；Fit system for another example between valve rod, spool and valve body is not reasonable, safety
The regulatory function of value is that the sealing based on complicated structure and many places realizes that cost of manufacture is high, and difficulty of processing is big, and leakproofness
It is difficult to ensure and maintains；For this purpose, the present invention also provides a kind of improvement design of safety valve 6, specific structure are as follows:
As shown in Figure 11,12, the safety valve 6 includes a valve body 35, is provided with valve chamber in valve body 35, valve chamber has through one
The partition 26 of valve opening 27 is separated into upper chamber 32 and lower room 25, and upper chamber 32 is communicated with atmosphere, lower room 25 then only with negative-pressure adsorption component
Negative pressure channel communicate；A valve block 34 moving up and down is equipped in lower room 25, be fixed on the upside of valve block 34 across valve opening 27 and
The lower magnetic pole 28 upwardly extended is provided with the eccentric orfice 33 that will pierce above and below it on valve block 34；Valve body 35 is equipped with solid once screw hole
Fixed screw rod 30, the lower end of screw rod 30 extend in upper chamber 32 and are fixed with upper magnetic post 29, upper end and the rotation being located at outside valve body 35
Button 31 is fixedly connected, 28 three center overlapping of axles of screw rod 30, upper magnetic post 29 and lower magnetic pole, and upper magnetic post 29 is located in lower magnetic pole 28
Side；When lower 25 negative pressure of room is not more than safety value, upper magnetic post 29 drives valve block 34 to be close to annular partition 26 with the gravitation of lower magnetic pole 28,
Valve opening 27 and eccentric orfice 33 are blocked and upper chamber 32 and lower room 25 are made to be in off state；Lower 25 negative pressure of room is greater than safety value
When, valve block 34 overcomes the gravitation of upper magnetic post 29 and lower magnetic pole 28 and moves down, and upper chamber 32 and lower room 25 are in connected state；Valve
Body 35 is separately fixed with a spacer pin 36 for being used to limit 34 downstream position of valve block positioned at 34 lower section of valve block, and spacer pin 36 is for preventing
Only valve block 34 is excessive moves down, and avoids upper magnetic post 29 and lower magnetic pole 28 apart from excessive and valve block 34 can not be driven to reset upwards；
After adopting the above structure, the reset of valve block 34 is real by the gravitation between lower magnetic pole 28 and upper magnetic post 29 to safety valve 6
Existing, and be the axial position that upper magnetic post 29 is adjusted by rotary screw 30, i.e., default safety value, therefore the setting of its safety value
More accurate, adjusting is more convenient, and the service life is longer for safety valve 6；Since screw rod 30, upper magnetic post 29 are respectively positioned on upper chamber 32
It is interior, and seal request is not necessarily between upper chamber 32 and the external world, therefore greatly simplified the overall structure of safety valve 6, reduce safety
The quantity of 6 sealing position of valve, so that the leakproofness of safety valve 6 is easier to realize and maintains.
Embodiment 3
In the needleless injector that can continuously inject disclosed in the embodiment 1, referring to shown in Fig. 7,8, multiple continuous micro note
When penetrating, after each striker assembly is excited, certain Forward can all occur for injection ram, and the negative pressure in sucker does not disappear completely
It is moved backward again with guide block 13 before losing, sucker restores again to best the adsorption effect of body surface at injection site, i.e. negative pressure
Absorbent module is run using the operating mode of " Batch Adsorption ", and thus one, can be after micro-injection of every completion, injection part
Position and the stress of peripheral region can obtain a temporary alleviation, be conducive to improve tissue at injection site to the infiltration of drug and
Absorbability, but disadvantage all needs to provide a component to drive absorbent module it is also obvious that when i.e. hammer body 19 moves backward every time
Negative pressure is generated, so that operating with for needleless injector is more laborious；Although the work of this " Batch Adsorption " of absorbent module
Mode is both advantageous and disadvantageous and the advantages outweigh the disadvantages, but only this one kind, operator's its operating mode have no option, it is clear that design is still not enough closed
Reason, it is difficult to meet clinical manipulation needs；For this purpose, the present invention has further improvement to absorbent module on that basis of example 1
Design, specific structure are as follows:
As shown in Figure 13,14,9 rear end of pull rod is fixed with a conical head 37, and the rear of pull rod 9 is filled equipped with a clamping
Set 39；Be equipped in device for clamping 39 be inserted into for conical head 37 and by locking hole 38 that conical head 37 locks, be used to release to taper
The releasing button 40 of first 37 locking, 39 tail end of device for clamping can front and back rotation by 41 hinged support of a support；Device for clamping 39
It can rotate to flattened state forward, after striker assembly, which is in, loads state, conical head 37 is inserted into locking hole 38 just and quilt
Device for clamping 39 locks, and device for clamping 39 can rotate to the state of starting backward, after striker assembly, which is in, loads state, conical head
37 do not contact with the generation of device for clamping 39；Thus one, there are two types of the available uses of operating mode for negative-pressure adsorption component tool, i.e.,
" Batch Adsorption " operating mode:
As shown in figure 13, device for clamping 39 is started, during each micro-injection, device for clamping 39 will not be to pull rod
9 are locked, and after the completion of each micro-injection, negative pressure piston 22 suitable can reset forward, negative-pressure adsorption component still use "
Have a rest absorption " operating mode operation；
" lasting absorption " operating mode:
As shown in figure 14, device for clamping 39 is laid flat, when striker assembly reaches load state for the first time, pull rod 9 will be locked
Fixed, during subsequent micro-injection, negative-pressure adsorption component will maintain constant negative pressure, sucker will persistently to injection site at
Body surface adsorbed, i.e., absorbent module using " lasting absorption " operating mode operation, after the completion of injection or injection process
In when needing to change injection point, locking of the device for clamping 39 to pull rod 9 can be released by releasing button 40, negative pressure piston 22 is forward
It resets, sucker can finally be made to eliminate the suction-operated to body surface；
It can be seen that there is " Batch Adsorption " and " lasting absorption " two after negative-pressure adsorption component uses above-mentioned improvement design
Kind of operating mode, in clinical use, operator can select to use according to the individual instances of oneself operating habit and patient,
Can also flexibly it be switched in entire injection process；
Furthermore, it can be used as the specific implementation structure of device for clamping 39: as shown in Figure 15,16, being filled in clamping
Set one is equipped in 39 can be up and down and the tongue piece 45 that blocks locking hole 38, be equipped on the downside of tongue piece 45 and it driven to reset upwards
Elastic slice 44, upside are then connect through pressing lever 42 with releasing button 40, and the holding hole passed through for conical head 37 is provided on tongue piece 45
43, when conical head 37 moves backward in locking hole 38, it can be penetrated by tapered surface in holding hole 43 and drive tongue piece 45
It moves down, when conical head 37 is fully located at 45 rear of tongue piece, tongue piece 45 is driven by elastic slice and moved up, and then locks conical head 37
Side behind, after such as driving tongue piece 45 to move down using releasing button 40, holding hole 43 is by the axial movement no longer to conical head 37
It constitutes and hinders, the locking released to conical head 37 is realized with this；
For further, as shown in figure 17, the support 41 of support is provided for device for clamping 39 and negative pressure cylinder 8 uses jointly
One removable seat 7 is mounted on the upside of gun barrel 15, on the one hand ensure that one of device for clamping 39 as negative-pressure adsorption component
Part can be assembled and be dismantled with needleless injector with negative-pressure adsorption component, and another party ensure that support 41 and negative pressure cylinder 8 begin
The relative positional relationship kept constant eventually eliminates the operation link being adjusted after combination to the relative position of the two.
Embodiment 4
In embodiment 3 in the disclosed needleless injector that can continuously inject, as shown in figure 14, in negative-pressure adsorption component
After adding the conical head 37 and device for clamping 39 of cooperation, negative-pressure adsorption component is made to have two kinds of " Batch Adsorption " and " lasting absorption "
Operating mode carrys out selective use, but when absorbent module is using " lasting absorption " operating mode, after drug injection, clamping dress
Locking to pull rod 9 can't be automatically terminated by setting 39, i.e., after drug injection, sucker to the suction-operated of body surface can't from
It is dynamic to disappear, it needs manually to operate device for clamping 39, there is certain inconvenience；For this purpose, the present invention is gone back on that basis of example 1
With another kind to the improvement design of absorbent module, specific structure is as follows:
As shown in Figure 18,19, the gun barrel 15 is fixedly arranged above a locking cylinder 48 for being located at 8 rear of negative pressure cylinder, locking
48 front ends of cylinder are communicated with atmosphere, and rear end is equipped with bottom, intracavitary to be equipped with lockup piston 50, lock of the lockup piston 50 through extending forward
Only bar 49 is fixedly connected with 9 tail end of pull rod；Locking cylinder 48,9 four center overlapping of axles of lockup piston 50, locking rod 49 and pull rod；
48 bottom of locking cylinder is equipped with one-way exhaust mouth 53 and air inlet 51, and air inlet 51 is connected through an air delivering pipeline 47 with intake valve 46,
As its name suggests, the air in locking cylinder 48 can drain into the external world to one-way exhaust mouth 53 through it, but extraneous air can not be through its entrance
In locking cylinder 48, it can be realized easily by check valve；Air delivering pipeline 47 is communicated with the atmosphere when intake valve 46 is open state,
Air delivering pipeline 47 is not communicated with atmosphere when intake valve 46 is in off state；Intake valve 46 is installed in gun body, only in default agent
It is opened after the drug injection of amount, and is converted to off state before striker assembly next time reaches the state of loading；Air inlet
Mouth 51 is separately communicated with the atmosphere through bypass conduit, and bypass line is equipped with the switch valve 52 that switchable and flow is adjusted；Thus one
Come, negative-pressure adsorption component has two kinds of available uses of operating mode, i.e.,
" Batch Adsorption " operating mode:
Switch valve 52 is adjusted to opening state, locking cylinder 48 is connected to atmosphere through bypass line, and lockup piston 50 can be with
22 front and back synchronizing moving of negative pressure piston, lockup piston 50 can't constitute locking effect to negative pressure piston 22, i.e. absorbent module is adopted
It is run with the operating mode of " Batch Adsorption "；And pass through the uninterrupted of regulating switch valve 52, locking after micro-injection is adjusted
The speed that piston 50 moves forward in locking cylinder 48, and then it is multiple forward that negative pressure piston 22 after the completion of each micro-injection is adjusted
The movement speed of position, thereby guarantees that after the completion of each micro-injection, and sucker can suitably reduce the suction-operated of body surface but not
As for disappearance, it is ensured that the slackness organized at injection site obtains maximum improvement in micro-injection gap twice；
" lasting absorption " operating mode:
Switch valve 52 is adjusted to closed state, is carried out loading for the first time when operating, the air of 50 rear side of lockup piston is through list
It is discharged to exhaust outlet 53, lockup piston 50 can be moved backward with negative pressure piston 22, after hammer body 19 excites, such as the medicine of preset dose
Object is not injected and is finished, then intake valve 46 keeps off state, due to that will not have air entrance, lockup piston on rear side of lockup piston 50
50 can not move forward, and then negative pressure piston 22 is locked, and during subsequent micro-injection, negative-pressure adsorption component will be maintained
Constant negative pressure, sucker will persistently adsorb injection site and peripheral region, i.e., absorbent module is using " lasting absorption "
Operating mode operation；After drug injection to preset dose, intake valve 46 is converted to connected state, outside air can through into
Air valve 46, air delivering pipeline 47, air inlet 51 enter in locking cylinder 48, and lockup piston 50 can move forward, and then relieve to negative
The locking of piston 22 is pressed, negative pressure piston 22 can reset forward, and sucker can finally be made to eliminate the suction-operated to body surface；Such as multiple
Injection point is needed to change during micro-injection, can be opened switch valve 52 after the completion of a micro-injection, lockup piston 50 is not
Negative pressure piston 22 is locked, negative pressure piston 22 can reset forward, and after sucker disappears to the suction-operated of body surface, adjustment is eventually
The relative position for holding injecting assembly 1 front end and injection site, then closes switch valve 52, then carry out subsequent micro-injection behaviour
Make, that is, completes the operation of replacement injection point；
It can be seen that having " Batch Adsorption " and " lasting to inhale after negative-pressure adsorption component uses above-mentioned improvement design
It is attached " two kinds of operating modes, operator may be selected to use during clinical manipulation, can flexibly it switch in entire injection process,
And after the drug injection of preset dose, sucker can eliminate the suction-operated of body surface automatically.
Embodiment 5
Intake valve 46 is used in negative-pressure adsorption component in example 4, as shown in Figure 18,19, which is used
In the connected state of control air delivering pipeline 47 and ambient atmosphere, only opened after the drug injection of preset dose, and
Striker assembly is converted to close off state before reaching the state of loading next time, is based on this technical requirements, in the prior art, uses
Solenoid valve and sensing element cooperation are easier to realize, but intake valve 46 is such as constituted with solenoid valve and sensing element, then
The appurtenances such as conducting wire, power supply must also be equipped with, so that the overall structure of this needleless injector is increasingly complex, cost significantly increases
Add, while increasing the failure rate in needleless injector clinical use to a certain extent, it is contemplated that these reasons, the present invention is also
Reasonable embodiment more scientific to intake valve 46, specific structure are as follows:
The column that cylindrical and both ends are communicated with atmosphere is equipped with as shown in Figure 18,19,20,21, in the intake valve 46
Chamber 55 is filled in, is equipped with the plunger 56 for tightly cooperating and being axially movable in plunger cavity 55,55 side of plunger cavity is equipped with and air delivering pipeline
47 connected gas outlets 57；When plunger 56 is located at its stroke rearmost end, gas outlet 57 is blocked by plunger 56 and makes intake valve 46
It is in close state, is in connected state when plunger 56 is moved rearwardly into intake valve 46 when gas outlet 57 is connected to plunger cavity 55；
The valve rod 58 for driving and moving it is connected on rear side of plunger 56,58 rear end of valve rod is located at the rear of valve body 35；Intake valve 46 is by gun body
It supports and is located at the front side of bore 18 and is located at the side of the push rod 17 of terminal injecting assembly 1,19 the two of valve rod 58 and hammer body
Central axis is parallel, and when intake valve 46 is in close state, the rear end of valve rod 58 is located in bore 18, when the rear end quilt of valve rod 58
Intake valve 46 is converted to open state just when tup 20 hits and exits bore 18 completely；One elasticity of rear end of valve rod 58 is drawn
Line 54 is connect with 19 front end of hammer body, and before striker assembly reaches the state of loading, hammer body 19, which can draw valve rod 58 and move back, makes air inlet
Valve 46 is converted to close off state；Flexible pull wire 54 is located at 20 side of tup, and the two is parallel；
Simultaneously as the working condition of intake valve 46 is only become by the shock of hammer body 19 and the effect of flexible pull wire 54
It changes, therefore existing frictional force should be able to prevent other external force factors from affecting between plunger 56 and plunger cavity 55, avoid plunger
56 relatively move with plunger cavity 55；On plunger 56 it can be improved between plunger cavity 55 by adding the means of sealing ring
Frictional force, while being also beneficial to guarantee the sealing performance between plunger 56 and plunger cavity 55；
Thus one, when carrying out first micro-injection, before striker assembly reaches the state of loading, hammer body 19 has been passed through
Elastic drag rope Forward valve rod 58 moves back, and intake valve 46 is made to be converted to close off state, and outside air can not be through intake valve 46, defeated at this time
Air pipe 47, air inlet 51 enter in locking cylinder 48, and lockup piston 50 can not move forward, i.e. 50 lockable negative pressure of lockup piston
The position of piston 22 makes to maintain existing negative pressure in negative-pressure adsorption component；Before in the drug of preset dose, injection is not finished completely, often
When secondary micro-injection, tup 20 cannot implement 58 rear end of valve rod to hit or can hit 58 tail end of valve rod but can not drive valve rod
Bore 18 is exited in 58 rear ends completely, and intake valve 46 still persistently remains off, i.e., lockup piston 50 is persistently to negative pressure piston 22
With locking effect；After the drug injection of preset dose, i.e. 17 rear end of push rod that drives terminal injecting assembly 1 of tup 20
When exiting bore 18 completely together with 58 rear end of valve rod of intake valve 46, intake valve 46 will be in the open state, outside air warp
Intake valve 46, air delivering pipeline 47, air inlet 51 enter in locking cylinder 48, and lockup piston 50 can move forward with negative pressure piston 22, in turn
Relieve the locking effect to negative pressure piston 22.
Embodiment 6
In the improvement design of two kinds of absorbent modules disclosed in embodiment 3,4, as shown in Figure 14,18, negative-pressure adsorption component
" Batch Adsorption " and " lasting absorption " two kinds of available uses of operating mode are all had, but both embodiments use original
Reason is to lock negative pressure piston 22 in injection process, and the structure of this mode is all complex, by existing common portion
The difficulty that part is realized is larger, implements to be not easy, for this purpose, the present invention also provides one kind based on embodiment 1, by existing common portion
Part is extremely easy the absorbent module improvement design implemented, and structure is embodied are as follows:
As shown in figure 22, in the negative-pressure adsorption component, it is unidirectional that one is also connected between safety valve 6 and exhaust end pipeline
Exhaust pipe 59 is successively arranged the unidirectional exhaust pipe 59 of control on the unidirectional exhaust pipe 59 from the front to the back and state is communicated with the atmosphere
Relief valve 60, only air is allowed to convey from the front to the back in unidirectional exhaust pipe 59 breather cheek valve 61, only allow it is unidirectional
Air drains into extraneous exhaust check valve 62 in exhaust pipe 59；Negative pressure line 5, which is equipped with one, has connection, cut-off two states
Switching valve 63, switching valve 63 be connected to when, negative pressure line 5 be on state, when switching valve 63 end when, negative pressure line 5 is in
End and acts on negative pressure cylinder 8 to sucker generation through safety valve 6 and unidirectional exhaust pipe 59；Thus one, negative-pressure adsorption component
With " Batch Adsorption " and " lasting absorption " two kinds of operating modes, i.e.,
" Batch Adsorption " operating mode:
Switching valve 63 is adjusted to open state, negative pressure device preferentially passes through negative pressure line 5 and is connected to sucker, under this state
Negative-pressure adsorption component is still worked by the way of in the same manner as in Example 1, i.e., is run using the operating mode of " Batch Adsorption "；
" lasting absorption " operating mode:
Switching valve 63 is adjusted to off state, in operation of loading for the first time, negative pressure piston 22 is moved backward, the sky in sucker
Gas enters in negative pressure cylinder 8 through unidirectional exhaust pipe 59, breather cheek valve 61, safety valve 6, and sucker generates suction-operated to body surface,
After the completion of micro-injection, negative pressure piston 22 resets forward under the driving of reset spring 23, but due on unidirectional exhaust pipe 59
It is provided with breather cheek valve 61 and exhaust check valve 62, the air in negative pressure cylinder 8 drains into the external world through exhaust check valve 62, without
Enter in sucker through breather cheek valve 61, i.e., the negative pressure before maintaining in sucker continues to adsorb body surface；Hereafter each
During micro-injection, safety valve 6 moves forward extra negative pressure removal, negative pressure piston 22 when negative pressure piston 22 moves backward
When not in sucker negative pressure constitute influence, i.e., sucker maintains constant suction-operated to body surface always；Multiple micro-injection
When needing to change the drug injection of injection point or preset dose in journey and completing, relief valve 60 is opened, outside air through relief valve 60,
Unidirectional exhaust pipe 59 enters in sucker, and the negative pressure in sucker is made to disappear, and sucker no longer generates suction-operated, Jin Erke to body surface
Carry out subsequent corresponding operating；
It can be seen that not only having " Batch Adsorption " and " lasting to inhale after negative-pressure adsorption component is designed using this kind
It is attached " two kinds of operating modes are available, and breather cheek valve 61, exhaust check valve 62 employed in the program, switching valve 63
And relief valve 60 is existing original part, and relatively conventional, implements to be relatively easy to；
At the same time, the relief valve 60 in the present embodiment can with the intake valve 46 in embodiment 5 using identical structure with
Mounting means, i.e., in " lasting absorption " operating mode, before first striker assembly reaches the state of loading, relief valve 60 is by hammer body
19 drive and switch to off state, and only after the drug injection of preset dose, relief valve 60 is driven by tup 20 and cut
Open state is shifted to, is thus realized after injection, technical purpose that sucker disappears automatically to the suction-operated of body surface.
Claims (2)
1. the needleless injector that one kind can be injected continuously comprising gun body, trigger component and terminal injecting assembly, gun body is by fixing
The gun rack and gun barrel of connection are constituted, and cylindrical bore is equipped in gun barrel；Trigger component is supported by gun body, taking human as outer masterpiece
For input；Terminal injecting assembly front end is equipped with injection orifice, and inside is equipped with the mobile push rod of injection ram, driving injection ram,
Combine gun barrel front end and push rod tail end extend in bore；It is characterized by further comprising:
Striker assembly comprising one is located at the hammer body in bore and being axially movable, and hammer body front end is equipped with the hammer small compared with its diameter
Head, the upside of bore are equipped with the guide groove for piercing gun barrel upper side wall, are fixed with and extend in guide groove and can be along guide groove on the upside of hammer body
The guide block of sliding；Hammer body, which persistently moves backward, will make striker assembly carry out accumulation of energy and reach the state of loading, after striker assembly excitation,
The energy stored by striker assembly is driven and is quickly moved forward by hammer body, and tup is made to generate shock to front component；Terminal injection group
The push rod tail end of part is used to cater to the shock of tup to drive injection ram Forward to make terminal injecting assembly implementing injection, passes through tune
The length that section push rod tail end protrudes into bore can realize the default of injection dosage；
Circulation pulls component, be placed in gun body by trigger component drive and only can one-way circulation operate, in cycle operation
In the process, the state of loading that reaches for driving striker assembly reciprocal is then excited, recycles striker assembly with this, and gradually
To front component generate shock；
Negative-pressure adsorption component, is made of negative pressure device and sucker；Negative pressure device includes a negative pressure cylinder, and negative pressure cylinder is fixed on gun barrel
The front end of upside and parallel with hammer body, negative pressure cylinder is suction end, and rear end is communicated with atmosphere, and negative pressure piston, drive are equipped in negative pressure cylinder
The pull rod that reset spring, the traction negative pressure piston for making negative pressure piston move forward move back, the rear end of pull rod extends to the rear of negative pressure cylinder；
The rear end of pull rod is fixed with a connecting lever for extending in guide groove and being located at guide block rear, when guide block and connecting lever contact, guide block to
Movement can drag connecting lever and move back with it afterwards, and guide block is moved forward then constitute connecting lever and be drawn；Sucker is by installation set and disk body
It constitutes, installation set can be tightly nested with outside terminal injecting assembly, and guarantee disk body and terminal injecting assembly center overlapping of axles and disk
Body front end face is located on front side of injection orifice；Sucker is equipped with an exhaust end, suction end of the exhaust end through negative pressure line and negative pressure cylinder
Connection；A safety valve for preventing negative pressure excessive is installed in negative pressure channel between negative pressure cylinder and sucker；The safety valve packet
A valve body is included, valve chamber is provided in valve body, valve chamber is separated into upper chamber and lower room, upper chamber and big gas phase through a partition with valve opening
Logical, lower room is then only communicated with the negative pressure channel of negative-pressure adsorption component；It is lower indoor equipped with a valve block moving up and down, valve block upside
It is fixed with the lower magnetic pole upwardly extended across valve opening, the eccentric orfice that will pierce above and below it is provided on valve block；Valve body is equipped with one
Through the screw rod that screw hole is fixed, the lower end of screw rod extends to indoor and is fixed with upper magnetic post, upper end and the knob being located at outside valve body
It is fixedly connected, screw rod, upper magnetic post and lower magnetic pole three center overlapping of axles, and upper magnetic post is located above lower magnetic pole；Lower room negative pressure is not
When greater than safety value, upper magnetic post and the gravitation of lower magnetic pole drive valve block to be close to annular partition, valve opening and eccentric orfice by closure and
Upper chamber and lower room are made to be in off state；When lower room negative pressure is greater than safety value, valve block overcome the gravitation of upper magnetic post and lower magnetic pole and
It moves down, upper chamber and lower room are in connected state；Valve body is separately fixed with one and is located at below valve block and is used to limit valve block downlink
The spacer pin of position.
2. the needleless injector that one kind according to claim 1 can be injected continuously, it is characterised in that: the terminal injection
The outer wall of component front end be equipped with one in a ring evagination and be used to limit the limited step of installation set back-end location；
The installation set is different according to internal diameter and is equipped with plurality of specifications, and each installation set can tightly be combined with disk body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910378425.9A CN110051909B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164892.2A CN106902422B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
| CN201910378425.9A CN110051909B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710164892.2A Division CN106902422B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110051909A true CN110051909A (en) | 2019-07-26 |
| CN110051909B CN110051909B (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910378512.4A Active CN109966589B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
| CN201910378518.1A Withdrawn CN109966590A (en) | 2017-03-20 | 2017-03-20 | A kind of needleless injector that can continuously inject |
| CN201710164892.2A Active CN106902422B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
| CN201910378425.9A Active CN110051909B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
| CN201910378556.7A Active CN110025857B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910378512.4A Active CN109966589B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
| CN201910378518.1A Withdrawn CN109966590A (en) | 2017-03-20 | 2017-03-20 | A kind of needleless injector that can continuously inject |
| CN201710164892.2A Active CN106902422B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910378556.7A Active CN110025857B (en) | 2017-03-20 | 2017-03-20 | Needleless injector capable of continuous injection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107822898B (en) * | 2017-11-24 | 2024-02-20 | 宁波大学 | Power assisting device of nasal feeding device |
| CN110179503B (en) * | 2019-06-18 | 2020-05-08 | 邵阳学院 | A push type adsorber for adsorbing human tissue |
| CN114129827B (en) * | 2021-11-30 | 2024-01-19 | 苏州和林微纳科技股份有限公司 | Vertical injection mechanism of needleless injector |
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- 2017-03-20 CN CN201710164892.2A patent/CN106902422B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109966589A (en) | 2019-07-05 |
| CN110025857B (en) | 2021-08-20 |
| CN110051909B (en) | 2021-07-16 |
| CN106902422A (en) | 2017-06-30 |
| CN109966589B (en) | 2021-09-07 |
| CN109966590A (en) | 2019-07-05 |
| CN106902422B (en) | 2020-02-11 |
| CN110025857A (en) | 2019-07-19 |
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Effective date of registration: 20210624 Address after: 342300 south of Ouxiang road and east of shangou Avenue, shangou Industrial Park, Yudu County, Ganzhou City, Jiangxi Province Applicant after: Jiangxi Wanglai Technology Co.,Ltd. Address before: 253000 room 1104, unit 1, 2 garden building, West Ling Road, Dezhou, Shandong. Applicant before: Wang Caifeng |
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