CN106902422A

CN106902422A - The needleless injector and its operating method that can continuously inject

Info

Publication number: CN106902422A
Application number: CN201710164892.2A
Authority: CN
Inventors: 王才丰
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-20
Filing date: 2017-03-20
Publication date: 2017-06-30
Anticipated expiration: 2037-03-20
Also published as: CN110051909B; CN106902422B; CN110051909A; CN109966590A; CN110025857B; CN110025857A; CN109966589A; CN109966589B

Abstract

The present invention relates to medicine equipment, disclose a kind of needleless injector that can continuously inject, its by the terminal injecting assembly for implement injection, the striker assembly for providing power for terminal injecting assembly, can order about striker assembly it is reciprocal reach the circulation that the state of loading then excited and pull component, driving cycle pull trigger component that component one-way circulation runs, the negative-pressure adsorption component that is driven by striker assembly and suction-operated can be produced to body surface and support and the gun body of running space is constituted for above-mentioned part is provided.In Clinical practice, can ensure that terminal injecting assembly front end keeps suitable matching relationship with injection site by negative-pressure adsorption component, improve the successful validity of each micro-injection, realize the quantity control to injection point in whole injection process, and the ability to accept and penetrating power organized at injection site to liquid are significantly improved, substantially improve application effect of the needleless injector in the injection of heavy dose of clinical drug.

Description

The needleless injector and its operating method that can continuously inject

Technical field

Fast can continuously inject and realize drug bolus infusion the present invention relates to a kind of medicine equipment, more particularly to one kind Needleless injector.

Background technology

Needleless injection, is that one kind is punctured without syringe needle and reaches drug injection purpose novel injection technology, and it has can subtract The pain and fear of few drug injection, reduce bacterium infection risk, it is to avoid syringe needle scratches and fracture etc. the generation of accident, medicine Absorb fast, long-term use is subcutaneous many advantages, such as do not play scleroma and injection efficiency high, and then has in future clinical medical treatment It is widely applied prospect.But the pre- preceding operation before traditional needleless injector per injection is relatively complicated, wastes time and energy, it is impossible to Efficiently enter Line Continuity injection, and injection dosage is turned into the short slab of existing needleless injector, can typically be only used to pancreas islet The low dose of clinical injection of the medicines such as element, and the clinical injection of the medicines such as the slightly larger antibiotic of dosage, interferon is not used to, this Reason hinders widespread adoption of the needleless injector in clinical injection field.

The patent of invention of Application No. 2016109677793 discloses a kind of needleless injector, and it is by gun body, percussion hammer group Part, circulation pull component, trigger component and terminal injecting assembly and constitute, by trigger component can driving cycle to pull component unidirectional Circular flow, and circulation can order about the efficiently gradually reciprocal completion of striker assembly " loading " during pulling component circular flow Acted with " exciting ", and terminal injecting assembly is realized multiple micro-injection in a short time, by the tired of multiple micro-injection Plus be the large bolus injection for realizing medicine, the deficiency of conventional traditional product is which overcomed, needleless injector has been expanded in clinic The range of application in drug injection field, and then have broad application prospects.

In needleless injector disclosed in the patent of invention of Application No. 2016109677793, it is by many of medicine Secondary micro-injection is cumulative and realize the large bolus injection of medicine, therefore its have on operation is required compared with traditional needle-free injectors it is certain Difference, be mainly manifested in：In whole injection process, must ensure that each micro-injection is effectively successfully not so final medicine The injection dosage of thing is cannot be clear and definite, it is impossible to accurately the drug injection of preset dose is realized, while also result in certain medicine Thing is wasted；Thus the injection point quantity of multiple micro-injection should enter human body reducing extraneous bacterium to be preferred less with liquid Risk, improves the aseptic and security of Needleless injection；In injection process, should improve to greatest extent organized at injection site Slackness, to improve at injection site ability to accept and penetrating power of the tissue to medicine, improve facing for medicine Needleless injection Bed effect.But for the current structure that above-mentioned needleless injector is used, during clinical manipulation, foregoing technology will for it Seeking Truth is difficult to realization comprehensively, or even there is contradiction.Such as：1. want to ensure that each micro-injection is effectively successfully, to need to protect Terminal injecting assembly front end tends to vertical close contact with body surface when demonstrate,proving each micro-injection, but due to the needleless injector Action of injection be to be excited by the action of cocking, in cocking, needleless injector swings unavoidably, make Obtain terminal injecting assembly front end to be difficult to ensure that with the contact condition of body surface, that is, realize that each micro-injection is effectively successfully have one Determine difficulty, be that there is operation higher to require；2. in theory the injection point quantity of multiple micro-injection to be preferred less, but the nothing The action and to excite action realized by the action of cocking of loading of needle injection, 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 during cocking in addition Exempt to swing, make the injection point overlap of multiple micro-injection be difficult to realize, or even in actual clinical operation, often often The injection point of secondary micro-injection is different from, and increased extraneous bacterium and enters internal approach with liquid；3. injection site is improved The slackness for locating tissue can improve Needleless injection effect, but the needleless injector and other conventional products are in clinical manipulation, such as Shown in Fig. 1, terminal injecting assembly 2 must apply larger pressure and can ensure front end and the body of terminal injecting assembly 2 to body surface The close contact of table so that be pressurized under injection site and form the dense region 1 that a tissue density significantly increases, because this is closely knit The presence in region 1 so that tissue is significantly reduced to the ability to accept and penetrating power of liquid at injection site；At the same time, often The front end of terminal injecting assembly 2 and terminal injecting assembly 2 in tight contact, the multiple micro-injection of injection site during secondary micro-injection Front end and the constant holding of injection site relative position, this 2 technical requirements can be by increasing the front end of terminal injecting assembly 2 Injection site is supported pressure to improve, it is clear that can not be with the technical requirements for improving the slackness organized at injection site simultaneously Realize, but with contradiction.

The content of the invention

Drug bolus can be realized by efficiently continuous several times micro-injection it is an object of the invention to provide one kind Needleless injection, and can ensure that each micro-injection success is effective, the injection point of multiple micro-injection can rationally be controlled, 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 that optimal Needleless injection effect is realized in clinical practice.

To realize above-mentioned technical purpose, the present invention is adopted the following technical scheme that：

A kind of needleless injector that can continuously inject, it includes：

Gun body, it is made up of the gun rack being fixedly connected with gun barrel, and cylindrical bore is provided with gun barrel, is set on the upside of bore There is the guide groove for piercing gun barrel upper side wall；

Striker assembly, it includes a hammer body for being located in bore and being axially movable, and hammer body front end is provided with small compared with its diameter Tup, upside is fixed with the guide block that extend in guide groove and can be slided along guide groove；Hammer body is persistently moved rearwards by that percussion hammer group will be made Part carries out accumulation of energy and reaches the state of loading, and after striker assembly is excited, energy that hammer body will be stored by striker assembly drives and quick Reach, makes tup produce shock to front part；

Circulation pulls component, its be placed in gun body and only can one-way circulation operating, it will drive during cycle operation The state of loading that reaches for making striker assembly reciprocal is then excited, and striker assembly is circulated with this, and gradually to front part Part produces shock；

Trigger component, it is supported by gun body, and it pulls component and unidirectionally follows using artificial external force as input, for driving cycle Ring is operated；

Terminal injecting assembly, its front end is provided with injection orifice, and inside is provided with injection ram, drives pushing away for injection ram movement Bar, its combination is extended in bore in the front end of gun barrel and push rod tail end, and push rod tail end is used to cater to the shock of tup to drive Injection ram reach makes terminal injecting assembly implement injection, and the length stretched into bore by adjusting push rod tail end can realize injection Dosage it is default；

Negative-pressure adsorption component, it is made up 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 communicates with air, and negative pressure work is provided with negative pressure cylinder The pull bar moved after back-moving spring, the traction negative pressure piston of filling in, order about negative pressure piston reach, the rear end of pull bar extends to negative pressure cylinder Rear；The rear end of pull bar is fixed with one and extends in guide groove and positioned at the connecting lever at guide block rear, when guide block is contacted with connecting lever, leads Block is moved rearwards by dragging connecting lever with moving thereafter, and guide block is moved forward then constitute connecting lever and drawn；Sucker by installation set and Disk body is constituted, and installation set can be tightly nested with outside terminal injecting assembly, and ensures disk body and terminal injecting assembly center overlapping of axles And disk body front end face is located at injection orifice front side；Sucker is provided with an exhaust end, the exhaust end through negative pressure line and negative pressure cylinder suction Gas end connects；One is installed in negative pressure channel between negative pressure cylinder and sucker prevents the excessive safety valve of negative pressure.

The operating method of the above-mentioned needleless injector that can continuously inject is：

1) injection dosage is default：

Adjustment terminal injecting assembly and the syntagmatic of gun body, that is, complete the default of injection dosage；

2) disinfected before injecting：

The body surface of injection site and outer peripheral areas to patient carries out disinfection treatment；

3) continuous several times micro-injection：

Sucker is combined with terminal injecting assembly, hand-held gun body, sucker is buckled on body surface at injection site periphery, and Ensure that terminal injecting assembly front end is supported with injection site, drive trigger component operation, hammer body drives negative pressure during rear shifting Moved after piston, striker assembly gradually realize loading state when, absorption of the sucker to body surface reach it is optimal and order about injection site with Terminal injecting assembly front end tightly contacts；Hand-held gun body is somewhat outer to move, and 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 relaxed；Continue to drive trigger component, hammer body To move afterwards again, when the negative pressure in sucker is not wholly absent, the negative pressure in sucker gradually increases, and treats that striker assembly is realized again After state of loading, injection site is realized tightly contacting again with terminal injecting assembly front end, is that micro-injection next time is carried out Prepare；Thus reciprocally carry out multiple micro-injection；

4) injection point is changed：

After a micro-injection is completed, it is not eager to drive trigger component operation, makes hammer body temporal persistence before bore Portion, after the negative pressure disappearance in sucker loses suction-operated to body surface, adjusts terminal injecting assembly front end with injection site Relative position, then carries out micro-injection next time again；

5) drug injection is finished：

After the drug injection of preset dose is finished, trigger component operation is no longer driven, hammer body rests on the front portion of bore, Negative pressure in sucker gradually weakens up to not having suction-operated to body surface, and needleless injector is removed, that is, complete whole Injection operation.

Furthermore, the outer wall of described terminal injecting assembly leading section be provided with one in a ring evagination and be used to limit The limited step of installation set back-end location.

Furthermore, described installation set is provided with plurality of specifications according to internal diameter difference, and each installation set can be with disk Body is tightly combined.

Furthermore, described safety valve includes a valve body, is provided with valve pocket in valve body, valve pocket through one have valve opening every Plate is separated into upper chamber and lower room, and upper chamber is communicated with air, and negative pressure channel of the lower room then only with negative-pressure adsorption component is communicated；Lower interior Be provided with a valve block moving up and down, valve block upside is fixed with the lower magnetic pole upwardly extended through valve opening, be provided with valve block by Its eccentric orfice for piercing up and down；Valve body is provided with the screw rod fixed once screw, and the lower end of screw rod extends to indoor and fixes There is upper magnetic post, upper end is fixedly connected with the knob outside valve body, screw rod, upper magnetic post and lower magnetic pole three center overlapping of axles, and Upper magnetic post is located at lower magnetic pole top；When lower room negative pressure is not more than safety value, upper magnetic post orders about valve block and is close to the gravitation of lower magnetic pole Toroidal membrane, valve opening is blocked with eccentric orfice and upper chamber and lower room is in cut-off state；When lower room negative pressure is more 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 positioned at valve block lower section.

Furthermore, described back end of tie rod is fixed with a conical head, and the rear of pull bar is provided with a device for clamping；Clamping It is provided with device and inserted for conical head and by the locking hole of conical head locking, for releasing the releasing button to conical head locking, Device for clamping tail end can front and rear rotation by a bearing hinged support；Device for clamping can rotate to forward flattened state, work as percussion hammer Component is in and loads after state, and conical head is inserted in locking hole and locked by device for clamping just, and device for clamping is rotatable backward To state is started, after striker assembly is in loads state, conical head is not produced with device for clamping and contacted；

Furthermore, be provided with device for clamping one can it is up and down and by locking hole block tongue piece, tongue piece downside set Have and order about its shell fragment for resetting upwards, upside then through pressing lever and releasing button connects, is provided with tongue piece and is available for conical head to pass through Holding hole, when conical head is moved rearwards by locking hole, it can penetrate in holding hole and order about under tongue piece by taper surface Move, when conical head is fully located at tongue piece rear, tongue piece is ordered about and upper shifting by shell fragment, and conical head then is locked in into rear side, Such as ordered about after tongue piece moves down using releasing button, holding hole will no longer be constituted to the axial movement of conical head and hindered, and be realized with this Release the locking to conical head；

Furthermore, installed using a removable seat jointly with negative pressure cylinder for the bearing that device for clamping provides support and fixed In the upside of gun barrel.

Furthermore, described gun barrel be fixedly arranged above one be located at negative pressure cylinder rear locking cylinder, locking cylinder front end with Air is communicated, and rear end is provided with bottom, and lockup piston, locking rod of the lockup piston through extending forward and pull bar tail end are provided with its chamber It is fixedly connected；Locking cylinder, lockup piston, locking rod and pull bar center overlapping of axles；Locking cylinder bottom is provided with one-way exhaust mouthful And air inlet, air inlet is connected through an air delivering pipeline with intake valve；Air delivering pipeline and atmosphere when intake valve is opening, Air delivering pipeline is not communicated with air when intake valve is closed mode；Intake valve is installed in gun body, and it is only in the medicine of preset dose Thing injection is opened after finishing, and is converted to cut-off state before striker assembly next time reaches the state of loading；Air inlet is separately passed through Bypass conduit and atmosphere, bypass line are provided with switchable and Flow-rate adjustment switch valve；

Furthermore, the plunger cavity that cylindrical and two ends communicate with air, plunger cavity are provided with described intake valve The plunger for being inside provided with tight cooperation and being axially movable, plunger cavity side is provided with the gas outlet being connected with air delivering pipeline；Work as plunger During positioned at its stroke rearmost end, gas outlet is blocked by plunger and is closed intake valve, when plunger is moved rearwardly into out Air inlet valve position is in connected state when gas port is connected with plunger cavity；Plunger rear side is connected with the valve rod for driving and moving it, valve rod rear end Positioned at the rear of valve body；Intake valve is located at the one of the front side of bore and the push rod positioned at terminal injecting assembly by gun body support Side, valve rod is parallel with the central shaft of both hammer bodies, and when intake valve is closed, the rear end of valve rod is located in bore, works as valve Intake valve is converted to opening just when the rear end of bar is clashed into by tup and exits bore completely；The elasticity of rear end one of valve rod Bracing wire is connected with hammer body front end, and before striker assembly reaches the state of loading, shifting changes intake valve after hammer body can draw valve rod It is closed mode；Flexible pull wire is located at tup side, and both are parallel.

Furthermore, it is also associated with one in described negative-pressure adsorption component, between safety valve and exhaust end pipeline unidirectional Exhaust pipe, is sequentially provided with the pressure release of the unidirectional exhaust pipe of control and atmosphere state from the front to the back on the unidirectional exhaust pipe Valve, only allow air conveyed from the front to the back in unidirectional exhaust pipe breather cheek valve, only allow unidirectional exhaust pipe hollow Gas drains into the exhaust check valve in the external world；Negative pressure line is provided with one has connection, the switching valve of cut-off two states, and switching valve connects When logical, negative pressure line is conducting state, and when switching valve ends, negative pressure line is in cut-off and makes negative pressure cylinder through safety valve and list Sucker is acted to exhaust pipe.

The present invention is compared with conventional art, and it has the advantages that：This needleless injector compares conventional product, and it is not Only can the carrying out continuous several times micro-injection of quickness and high efficiency and realize the large bolus injection of medicine, and it has additional negative-pressure adsorption group Part, during being moved after hammer body, sucker can be adsorbed gradually to the body surface at injection site, be in every time in striker assembly During state of loading, sucker is respectively provided with optimal adsorption effect to body surface at injection site, in hand-held needleless injector operating process In, even if needleless injector shakes, can still ensure 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 multiple micro-injection is carried out continuously, Multiple micro-injection can be carried out in same injection point, also dependent on needing easily to change injection point, be conducive to reduction repeatedly micro- The injection point quantity of injection is measured, extraneous bacterium is reduced and is entered internal approach, improve the security of heavy dose of medicine Needleless injection； This needleless injector in clinical practice, the close contact of terminal injecting assembly front end and injection site, mainly by sucker The suction-operated of body surface at injection site is achieved, therefore terminal injecting assembly end to injection site without applying too big Pressure, injection site pressure is smaller and more balanced, and injection site downside tissue can't form dense region, in addition every Before secondary micro-injection, hand-holdable gun body is somewhat outer to move, and alleviates terminal injecting assembly and supports pressure to injection site, can enter one Step improves the Shu Chi degree organized at injection site, greatly improves at injection site tissue to the ability to accept of liquid and oozes Saturating ability, is great meaning for heavy dose of Needleless injection of medicine；Further, since this needleless injector is using process In, absorbent module can ensure that terminal injecting assembly keeps good and tightly contacts with injection site, and excessive without operator Divert one's attention to pay close attention to, so can be physical and mental other operations such as input " loading " and " exciting " in so that operation is more prone to, efficiency It is higher；Absorbent module need not configure special power set to drive, but be driven 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 rational holistic cost for reducing needleless injector product, improves cost performance on definite meaning.

Brief description of the drawings

Fig. 1 is the mated condition figure of terminal injecting assembly and injection site when existing needleless injector is used.

Fig. 2 is one of schematic appearance of needleless injector in embodiment 1.

Fig. 3 is the two of the schematic appearance of needleless injector in embodiment 1.

Fig. 4 is one of internal structure schematic diagram of needleless injector in embodiment 1.

Fig. 5 is the two of the internal structure schematic diagram of needleless injector in embodiment 1.

Fig. 6 is the structural representation 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 be embodiment 1 in needleless injector reach state diagram when loading state in striker assembly.

Fig. 9 is the mated condition figure of terminal injecting assembly and injection site when needleless injector is used in embodiment 1.

Figure 10 is the cooperation schematic diagram of sucker and terminal injecting assembly in embodiment 1.

Figure 11 is one of structural representation of safety valve in embodiment 2.

Figure 12 is the two of the structural representation of safety valve in embodiment 2.

Figure 13 is view of the needleless injector under " Batch Adsorption " mode of operation in embodiment 3.

Figure 14 is view of the needleless injector under " lasting absorption " mode of operation in embodiment 3.

Figure 15 is one of sectional view when device for clamping is locked to conical head in embodiment 3.

Figure 16 is two of sectional view when device for clamping is locked to 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 view of the needleless injector when lockup piston is locked to negative pressure piston in embodiment 4.

Figure 19 is view of the needleless injector after lockup piston releasing is locked to negative pressure piston in embodiment 4.

Figure 20 is structural representation of air inlet valve position when cut-off state in embodiment 5.

Figure 21 is structural representation of air inlet valve position when opening in embodiment 5.

Figure 22 is the structural representation 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 bar, 10, connecting lever, 11, gun rack, 12, trigger component, 13, guide block, 14, guide groove, 15, gun barrel, 16th, injection orifice, 17, push rod, 18, bore, 19, hammer body, 20, tup, 21, circulation pull component, 22, negative pressure piston, 23, reset Spring, 24, limited step, 25, lower room, 26, dividing plate, 27, valve opening, 28, lower magnetic pole, 29, upper magnetic post, 30, screw rod, 31, knob, 32nd, upper chamber, 33, eccentric orfice, 34, valve block, 35, valve body, 36, spacer pin, 37, conical head, 38, locking hole, 39, device for clamping, 40th, button is released, 41, bearing, 42, pressing lever, 43, holding hole, 44, shell fragment, 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 mouthful, 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, a kind of needleless injector that can continuously inject disclosed by the invention, its by gun body, hit Hammer component, circulation pull component 21, trigger component 12, terminal injecting assembly 1 and the most of composition of negative-pressure adsorption component six；

Wherein, referring to shown in Fig. 2,3,4, described gun body is made up of the gun rack 11 being fixedly connected with gun barrel 15, gun barrel 15 Cylindrical bore 18 is inside provided with, the upside of bore 18 is provided with the guide groove 14 for piercing the upper side wall of gun barrel 15；Gun body is used to be it His part provides support and running space, and its structure should have is easy to hand-held characteristic；

Wherein, referring to shown in Fig. 4,5, described striker assembly includes a hammer body for being located in bore 18 and being axially movable 19, the front end of hammer body 19 is provided with the tup 20 small compared with its diameter, and the upside of hammer body 19 is fixed with and extends in guide groove 14 and can be along guide groove 14 guide blocks 13 for sliding；Hammer body 19 is persistently moved rearwards by making the striker assembly carry out accumulation of energy and reach the state of loading, striker assembly After exciting, the energy that hammer body 19 will be stored by striker assembly drives and quickly moves forward, and 20 pairs of front parts of tup is produced shock；

Wherein, referring to shown in Fig. 4,5, described circulation pulls component 21 and is placed in gun body, and it only can one-way circulation fortune Turn, circulation pulls component 21 during cycle operation, will order about the reciprocal state of loading that reaches of striker assembly and is then swashed Hair, makes striker assembly be circulated with this, and being produced to front part gradually is clashed into；

Wherein, referring to shown in Fig. 2,3, described trigger component 12 is supported by gun body, and it is used using artificial external force as input The operating of the one-way circulation of component 21 is pulled in driving cycle；

Wherein, referring to shown in Fig. 4,5, the described front end of terminal injecting assembly 1 is provided with injection orifice 16, and inside is provided with injection and lives Plug, the push rod 17 for driving injection ram movement；End injecting assembly combination is in the front end of gun barrel 15 and the tail end of push rod 17 extends to rifle In thorax 18, the tail end of push rod 17 drives injection ram to move forward for catering to the shock of tup 20 makes terminal injecting assembly 1 implement note Penetrate, the length stretched into bore 18 by adjusting the tail end of push rod 17 can realize the default of injection dosage；

Wherein, referring to shown in Fig. 3,5,6, described negative-pressure adsorption component is made up of negative pressure device and sucker；Negative pressure device Including a negative pressure cylinder 8, the negative pressure cylinder 8 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 communicates with air, and negative pressure cylinder 8 is interior to be provided with negative pressure piston 22, can order about negative pressure piston 22 moves to reset bullet foremost The pull bar 9 moved after spring 23, traction negative pressure piston 22, the rear end of pull bar 9 extends to the rear of negative pressure cylinder 8, and negative pressure cylinder 8, negative pressure is lived Plug 22 and the center overlapping of axles of the three of pull bar 9；The rear end of pull bar 9 is fixed with one and extends in guide groove 14 and positioned at the rear of guide block 13 Connecting lever 10；When guide block 13 is contacted with connecting lever 10, if guide block 13 is such as moved rearwards by with hammer body 19, connecting lever 10 can be dragged same with its Step is moved rearwards by, until striker assembly reaches the state of loading, if guide block 13 is moved forward with hammer body 19, it will not be to the structure of connecting lever 10 Into traction；Sucker is made up of installation set 4 and disk body 3, and installation set 4 can be tightly nested with outside terminal injecting assembly 1, and ensures disk body 3 are located at the front side of injection orifice 16 with the center overlapping of axles of terminal injecting assembly 1 and the front end face of disk body 3；Sucker is provided with an exhaust end, should Exhaust end is connected 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 dismounting of absorbent module, negative pressure cylinder 8 can install solid through a removable seat 7 Due to the upside of gun barrel 15.

Referring to shown in Fig. 4-9, the operation principle and operating method of the above-mentioned needleless injector that can continuously inject are：

Adjustment terminal injecting assembly 1 and the syntagmatic of gun body, that is, adjust the length that the tail end of push rod 17 is stretched into bore 18, Needed to complete the default of injection dosage according to clinic；Carry out disinfection place to the body surface at the injection site and outer peripheral areas of patient Reason；Sucker is combined in the front end of terminal injecting assembly 1, hand-held gun body makes sucker buckle the body surface at injection site periphery And ensure that the front end of terminal injecting assembly 1 is supported with injection site, pulling component 21 by the driving cycle of trigger component 12 operates, and follows Ring pulls the traction hammer body 19 of component 21 and is moved rearwards by, after hammer body 19 is moved rearwardly into guide block 13 to be supported with connecting lever 10, connecting lever 10, With hammer body 19 is synchronous be moved rearwards by for collective by pull bar 9 and negative pressure piston 22, during negative pressure piston 22 is moved rearwards by, negative pressure Negative pressure is produced in cylinder 8 and gradually the air among sucker is extracted out, when striker assembly reaches and loads state, sucker will be to body surface Suction-operated it is optimal and order about injection site and tightly contacted with the front end of terminal injecting assembly 1；Hand-held gun body is somewhat outer to move, and alleviates Terminal injecting assembly 1 supports pressure to injection site, the tissue at injection site is tended to Shu Chi states, continues with trigger The driving cycle of component 12 pulls 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 clash into, push rod 17 drive injection ram reach, promote terminal injecting assembly 1 complete a micro-injection；When hitting After hammer component is excited, guide block 13 is moved forward with hammer body 19, and constraint is no longer caused to connecting lever 10, and negative pressure piston 22 is in back-moving spring Start to move forward at a slow speed in the presence of 23, the negative pressure in sucker weakens, the stress of injection site and outer peripheral areas is able to alleviate and make Tissue is relaxed, and trigger component 12 continues to be driven, and hammer body 19 will be moved afterwards again, and the negative pressure in sucker is not wholly absent i.e. When the front end of terminal injecting assembly 1 does not change with injection site relative position, connecting lever 10 is dragged backward by guide block 13 again, is inhaled Negative pressure in disk gradually increases, and after striker assembly realizes the state of loading again, injection site is with the front end of terminal injecting assembly 1 again It is secondary to realize tight contact, it is ready micro-injection next time；Thus reciprocally carry out multiple micro-injection, treat repeatedly Medicine micro-injection and after realizing the drug injection of preset dose, no longer drive trigger component 12 to run, now hammer body 19 is stopped In the front portion of bore 18, guide block 13 does not cause obstacle to the movement of connecting lever 10, and negative pressure piston 22 is in the presence of back-moving spring 23 And move forward and reset, until the forefront of negative pressure cylinder 8 is reached, and the negative pressure in sucker weakens up to disappearing therewith, so that no longer right Body surface at injection site has suction-operated, and needleless injector is removed, that is, complete whole 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 of injection larger, single being injected in an injection point obviously can be beyond the local organization to medicine The receiving ability of thing, it is impossible to reach expected drug injection effect, it is necessary to according to medicine agent during multiple micro-injection Amount number and the individual instances with reference to patient carry out replacing injection point；Now, only need to be not anxious after a micro-injection is completed In driving trigger component 12 to run, make the temporal persistence of hammer body 19 in the front portion of bore 18, treat that negative pressure piston 22 is reset to negative pressure cylinder 8 Forefront, i.e., negative pressure in sucker disappear and after losing suction-operated to body surface, the front end of regulation terminal injecting assembly 1 and injection The relative position at position, then drives trigger component 12 to run again, carries out micro-injection next time, thus can realize flexibly replacing 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 the air-breathing of negative pressure cylinder 8 The negative pressure of end output is excessive, and safety valve 6 will be opened, and outside air is negative by what is entered between negative pressure cylinder 8 and sucker through safety valve 6 In pressure passageway, negative pressure is maintained in the safety value of setting, sucker on the one hand can be avoided excessive to the absorption affinity of body surface and to suffering from Person causes uncomfortable or injury, negative pressure on the other hand can be avoided excessive the parts such as negative pressure cylinder 8, negative pressure line 5, sucker are caused to damage Evil.

In Clinical practice, this needleless injector is continuously injected because of carrying out that can be rapidly and efficiently, and then can be used for a large amount of medicines The Needleless injection operation of thing, but this is not limited to, the Needleless injection operation that it is also applied for trace drug；Such as in clinical manipulation Without repeatedly continuous injection, or need to continuously inject but operating personnel's experience is relatively enriched, thus can not be carried out by absorbent module Needleless injection, can now make needleless injector lighter and handier the overall separation from needleless injector of absorbent module, and operation is more 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 Component 21, the concrete structure of trigger component 12 and terminal injecting assembly 1 and matching relationship each other, how is striker assembly Energy accumulation is completed by loading, the quick reach of hammer body 19 how is realized by exciting, how circulation pulls component 21 Logical circulating transfers and orders about reciprocal the carrying out of striker assembly and load and excite, and how trigger component 12 drives external force as input Dynamic circulation pulls the operating of the one-way circulation of component 21, and how terminal injecting assembly 1 provides power and carry out micro note by striker assembly Penetrate, how to realize the patent of invention institute of these structures such as default and mechanism in Application No. 2016109677793 of injection dosage Existing description in detail, is prior art, therefore repeat no more in the present invention in a kind of disclosed needleless injector.

Referring to shown in Fig. 6,7,8, in the above-mentioned needleless injector that can continuously inject, negative pressure dress in negative-pressure adsorption component The size and installation site put have certain technical requirements, such as：

1. when striker assembly reaches and loads state, negative pressure piston 22 should be located at the postmedian of negative pressure cylinder 8, thereby guarantee that every time Negative pressure device is in negative pressure output state before micro-injection；

2. striker assembly excite and order about terminal injecting assembly 1 complete a micro-injection after, if not to trigger component 12 Operated, now hammer body 19 rests on the front portion of bore 18, negative pressure piston 22 can be driven by back-moving spring 23 and is reset to negative Pressure cylinder 8 foremost, thus can ensure after the completion of each micro-injection, as carried 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 negative pressure cylinder 8 foremost, back-moving spring 23 should still in non-the fully extended state, when Striker assembly is reached when loading state, and back-moving spring 23 should still be not in complete compressive state, thereby guarantee that back-moving spring 23 Elastic telescopic scope 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 size, the coefficient of elasticity of bar 9 and back-moving spring 23 are calculated, and by the relative installation of negative pressure device and gun body Adjusted, be easily achieved, and performing creative labour need not be paid.

Referring to shown in Figure 10, in the above-mentioned needleless injector that can continuously inject, in clinical manipulation, need to be according to operation need Want and sucker is combined or dismantled with terminal injecting assembly 1, in order to ensure that both can efficiently be combined connection, can Be provided with the outer wall of the leading section of terminal injecting assembly 1 one in a ring evagination and be used to limit the spacing of the back-end location of installation set 4 , only need to be nested with installation set 4 in the front end of terminal injecting assembly 1 from the front to the back during combination by step 24, and installation set is then promoted backward 4, after it is supported with limited step 24, that is, complete sucker and be connected with the combination of terminal injecting assembly 1.

At the same time, it is contemplated that during clinical manipulation, sucker need to tightly be combined with terminal injecting assembly 1, therefore is installed Set 4 should have matching with terminal injecting assembly 1, and terminal injecting assembly 1 may set according to the external diameter of its leading section difference There is plurality of specifications, therefore in the present invention, sucker has plurality of specifications according to the difference of the internal diameter of installation set 4, the suction of different size Disk is matched one by one with the terminal injecting assembly 1 of different size；

If product will certainly be increased it is also contemplated that the sucker of each specification is constituted by installation set 4 with disk body 3 simultaneously Overall acquisition cost, therefore sucker and installation set 4 can be different according to internal diameter using Combination Design, i.e. installation set 4 and be provided with various Specification, each installation set 4 can tightly be combined with disk body 3；Generally, due to during clinical manipulation, sucker can't With injection point directly contact, therefore it can be used for multiple times, and such as sucker can also adopt disk body 3 with installation set 4 using after Combination Design It is made of disposable material, disk body 3 can be in time changed according to clinical safety hygiene information, due to the simple structure of disk body 3, is fabricated to This is cheap, can't constitute excessive influence to the use cost of needleless injector.

Referring to shown in Fig. 9, said structure is employed based on the needleless injector that can continuously inject, by negative-pressure adsorption component The function of being possessed, when being capable of achieving each micro-injection, the front end of terminal injecting assembly 1 is in close contact with injection site, it is ensured that every Secondary micro-injection success is effective, realizes the precise control of final injection dosage；During multiple micro-injection, can come as needed Maintain or convert the relative position of the front end of terminal injecting assembly 1 and injection site, you can to the flexible control of injection point, can be in note Injection point quantity is reduced during penetrating to greatest extent, the risk that extraneous bacterium enters human body is reduced；The front end of terminal injecting assembly 1 Suction-operated of the sucker to body surface is relied primarily on the close contact of injection site realized that the tissue at injection site can't Pressure is supported by too big, lifting surface area is big, stress is smaller and equilibrium, and injection site downside will not form dense region, protect Absorption and penetrating power of the tissue to medicine at injection site have been demonstrate,proved, the clinical effectiveness of medicine Needleless injection has been improve；Clinic behaviour In work, when completing first micro-injection, the front end of terminal injecting assembly 1 has established suitable relativeness with injection site, after In continuous micro-injection operation, excessive concern is carried out without the relativeness again to terminal injecting assembly 1 and injection site, entered And can be physical and mental input other operation in, reduce operation difficulty, improve medical efficiency.

Embodiment 2

In the disclosed needleless injector that can continuously inject of 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 safety valve 6 outside air It is appropriate to enter in pressure passageway, the negative pressure in negative pressure channel is not higher than default 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 has certain defect, such as valve element generally using spring come Drive and reset, sensitivity is poor, and accuracy is relatively low；Fit system for another example between valve rod, valve element 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 sealing It is difficult to ensure that and maintenance；Therefore, present invention also offers a kind of improvement design of safety valve 6, its concrete structure is：

As shown in Figure 11,12, described safety valve 6 includes being provided with valve pocket in a valve body 35, valve body 35, and valve pocket has through one The dividing plate 26 of valve opening 27 is separated into upper chamber 32 and lower room 25, and upper chamber 32 is communicated with air, lower room 25 then only with negative-pressure adsorption component Negative pressure channel communicate；A valve block moving up and down 34 is provided with lower room 25, the upside of valve block 34 is fixed with through valve opening 27 The lower magnetic pole 28 for upwardly extending, is provided with the eccentric orfice 33 for piercing it up and down on valve block 34；Valve body 35 is provided with solid once screw Fixed screw rod 30, the lower end of screw rod 30 extends in upper chamber 32 and is fixed with upper magnetic post 29, upper end and the rotation being located at outside valve body 35 Button 31 is fixedly connected, screw rod 30, upper magnetic post 29 and the three center overlapping of axles of lower magnetic pole 28, and upper magnetic post 29 is located in lower magnetic pole 28 Side；When the lower negative pressure of room 25 is not more than safety value, upper magnetic post 29 orders about valve block 34 and is close to toroidal membrane 26 with the gravitation of lower magnetic pole 28, Valve opening 27 is blocked with eccentric orfice 33 and upper chamber 32 and lower room 25 is in cut-off state；The lower negative pressure of room 25 is more 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 one is used to limit the spacer pin 36 of the downstream position of valve block 34 positioned at the lower section of valve block 34, and spacer pin 36 is used to prevent Only valve block 34 is excessive moves down, it is to avoid upper magnetic post 29 and lower magnetic pole 28 are apart from excessive and cannot order about valve block 34 and reset upwards；

Using after said structure, the reset of valve block 34 is by the gravitation reality between lower magnetic pole 28 and upper magnetic post 29 to safety valve 6 It is existing, and pass through the axial location that rotary screw 30 can adjust upper magnetic post 29, i.e. preset security value, therefore the setting of its safety value More accurate, regulation more facilitates, and the service life of safety valve 6 is longer；Because screw rod 30, upper magnetic post 29 are respectively positioned on upper chamber 32 It is interior, and without seal request between upper chamber 32 and the external world, therefore the overall structure of safety valve 6 is greatly simplified, reduce safety The quantity of the sealing position of valve 6 so that the sealing of safety valve 6 is more prone to realize and maintains.

Embodiment 3

In the disclosed needleless injector that can continuously inject of embodiment 1, referring to shown in Fig. 7,8, multiple continuous micro is noted When penetrating, after each striker assembly is excited, injection ram can all occur certain reach, and negative pressure in sucker does not disappear completely It is moved rearwards by with guide block 13 again before losing, sucker recovers to optimal again to the adsorption effect of body surface at injection site, i.e. negative pressure Absorbent module is run using the mode of operation of " Batch Adsorption ", and thus one, can be after micro-injection of every completion, injection part Position and the stress of outer peripheral areas can obtain a temporary transient alleviation, be conducive to improving tissue at injection site to the infiltration of medicine and Absorbability, but shortcoming is it is also obvious that when i.e. hammer body 19 is moved rearwards by every time, all need to provide a component to drive absorbent module Produce negative pressure so that operating with for needleless injector is more laborious；Although the work of this " Batch Adsorption " of absorbent module Pattern is both advantageous and disadvantageous and the advantages outweigh the disadvantages, but its mode of operation only this one kind, and operator is had no option, it is clear that design is still not enough closed Reason, it is difficult to meet clinical manipulation needs；Therefore, the present invention has further improvement on the basis of embodiment 1 to absorbent module Design, concrete structure is：

As shown in Figure 13,14, the described rear end of pull bar 9 is fixed with a conical head 37, and the rear of pull bar 9 is provided with clamping dress Put 39；Be provided with device for clamping 39 inserted for conical head 37 and lock conical head 37 locking hole 38, for releasing to taper The releasing button 40 of first 37 locking, the tail end of device for clamping 39 can front and rear rotation by the hinged support of a bearing 41；Device for clamping 39 Can rotate to flattened state forward, when striker assembly be in load state after, conical head 37 just insertion locking hole 38 in and quilt Device for clamping 39 is locked, and device for clamping 39 can rotate to the state of starting backward, after striker assembly is in loads state, conical head 37 do not contact with the generation of device for clamping 39；Thus one, negative-pressure adsorption component has that two kinds of mode of operations are available to be used, i.e.,

" Batch Adsorption " mode of operation：

As shown in figure 13, device for clamping 39 is started, during each micro-injection, device for clamping 39 will not be to pull bar 9 are locked, after the completion of each micro-injection, the reset forward that negative pressure piston 22 can be appropriate, negative-pressure adsorption component still using " Have a rest absorption " mode of operation operation；

" lasting absorption " mode of operation：

As shown in figure 14, device for clamping 39 is laid flat, when striker assembly reaches load state for the first time, pull bar 9 will be locked Fixed, during follow-up 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 " mode of operation operation, after the completion of injection or injection process In when need to change injection point, locking of the device for clamping 39 to pull bar 9 can be released by button 40 is released, negative pressure piston 22 is forward Reset, sucker is eliminated the suction-operated to body surface；

As can be seen here, after negative-pressure adsorption component uses above-mentioned improvement design, with " Batch Adsorption " and " lasting absorption " two Mode of operation is planted, in Clinical practice, operator can select to use according to the individual instances of the operating habit of oneself and patient, Also can flexibly be switched in whole injection process；

Furthermore, the specific implementation structure as device for clamping 39 can be used：As shown in Figure 15,16, filled in clamping Put be provided with 39 one can tongue piece 45 that is up and down and blocking locking hole 38, the downside of tongue piece 45 is provided with orders about what it resetted upwards Shell fragment 44, upside is then connected through pressing lever 42 with button 40 is released, and the holding hole for being available for conical head 37 to pass through is provided with tongue piece 45 43, when conical head 37 is moved rearwards by the locking hole 38, it can penetrate in holding hole 43 by taper surface and order about tongue piece 45 Move down, when conical head 37 is fully located at 45 rear of tongue piece, tongue piece 45 is ordered about and upper shifting by shell fragment, then locks conical head 37 Side behind, is such as ordered about after tongue piece 45 moves down using releasing button 40, and holding hole 43 is by the axial movement no longer to conical head 37 Constitute and hinder, realize releasing the locking to conical head 37 with this；

It is that device for clamping 39 provides the bearing 41 of support and negative pressure cylinder 8 is used jointly as shown in figure 17 for further One removable seat 7 is mounted on the upside of gun barrel 15, on the one hand ensure that device for clamping 39 as the one of negative-pressure adsorption component Part, can be assembled and be dismantled with negative-pressure adsorption component with needleless injector, and the opposing party ensure that bearing 41 begins with negative pressure cylinder 8 Constant relative position relation is kept eventually, eliminates the operation link being adjusted to both relative positions after combination.

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 setting up the conical head 37 and device for clamping 39 of cooperation, negative-pressure adsorption component is set to possess two kinds of " Batch Adsorption " and " lasting absorption " Mode of operation come it is selective use, but absorbent module using " lasting absorption " mode of operation when, after drug injection is finished, clamping dress Putting 39 can't automatically terminate locking to pull bar 9, i.e., after drug injection is finished, suction-operated of the sucker to body surface can't from It is dynamic to disappear, need manually to operate device for clamping 39, with certain inconvenience；Therefore, the present invention goes back on the basis of embodiment 1 With another kind to the improvement design of absorbent module, its concrete structure is as follows：

As shown in Figure 18,19, described gun barrel 15 is fixedly arranged above a locking cylinder 48 for being located at the rear of negative pressure cylinder 8, locking 48 front ends of cylinder communicate with air, and rear end is provided with bottom, and lockup piston 50, lock of the lockup piston 50 through extending forward are provided with its chamber Stopping bar 49 is fixedly connected with the tail end of pull bar 9；Locking cylinder 48, lockup piston 50, locking rod 49 and the center overlapping of axles of pull bar 9 four； 48 bottoms of locking cylinder are provided with one-way exhaust mouthful 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 mouthful 53 through it, but the air in the external world cannot be through its entrance In locking cylinder 48, it passes through check valve can realize easily；Air delivering pipeline 47 and atmosphere when intake valve 46 is opening, Air delivering pipeline 47 is not communicated with air when intake valve 46 is closed mode；Intake valve 46 is installed in gun body, and it is only in default agent The drug injection of amount is opened after finishing, and is converted to cut-off state before striker assembly next time reaches the state of loading；Air inlet Mouth 51 is another through bypass conduit and atmosphere, and bypass line is provided with switchable and Flow-rate adjustment switch valve 52；Thus one Come, negative-pressure adsorption component possesses that two kinds of mode of operations are available to be used, i.e.,

" Batch Adsorption " mode of operation：

Switch valve 52 is adjusted to open mode, locking cylinder 48 is connected with air through bypass line, lockup piston 50 can be with Synchronizing moving before and after negative pressure piston 22, lockup piston 50 can't constitute locking action, i.e. absorbent module and adopt to negative pressure piston 22 Run with the mode of operation of " Batch Adsorption "；And by adjusting the uninterrupted of switch valve 52, can adjust locking after micro-injection Negative pressure piston 22 is multiple forward after the completion of the speed that piston 50 is moved forward in locking cylinder 48, and then adjustable each micro-injection The translational speed of position, is thereby guaranteed that after the completion of each micro-injection, and sucker can be reduced suitably but not to the suction-operated of body surface As for disappearance, it is ensured that the slackness organized at injection site is improved to greatest extent in micro-injection gap twice；

" lasting absorption " mode of operation：

Switch valve 52 is adjusted to closed mode, carry out loading for the first time operation when, the air of the rear side of lockup piston 50 is through list Discharged to exhaust outlet 53, lockup piston 50 can be moved rearwards by with negative pressure piston 22, after hammer body 19 is excited, such as the medicine of preset dose Thing is not injected and finished, then intake valve 46 keeps cut-off state, because the rear side of lockup piston 50 will not have air to enter, lockup piston 50 cannot be moved forward, and then negative pressure piston 22 is locked, and during follow-up micro-injection, negative-pressure adsorption component will be maintained Constant negative pressure, sucker will be adsorbed persistently to injection site and outer peripheral areas, i.e., absorbent module is using " lasting absorption " Mode of operation is run；After the drug injection of preset dose is finished, intake valve 46 is converted to connected state, and outside air can be through entering Air valve 46, air delivering pipeline 47, air inlet 51 enter in locking cylinder 48, and lockup piston 50 can be moved forward, and then relieve to negative The locking of piston 22 is pressed, negative pressure piston 22 can reset forward, sucker is eliminated the suction-operated to body surface；Such as multiple Need to change injection point during micro-injection, can open 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, after suction-operated of the sucker to body surface disappears, adjustment is eventually The end front end of injecting assembly 1 and the relative position of injection site, then close switch valve 52, then carry out follow-up micro-injection behaviour Make, that is, complete the operation for changing injection point；

As can be seen here, after negative-pressure adsorption component uses above-mentioned improvement design, it has " Batch Adsorption " and " lasting to inhale It is attached " two kinds of mode of operations, operator may be selected to use during clinical manipulation, can flexibly switch in whole injection process, And after the drug injection of preset dose is finished, suction-operated of the sucker to body surface can be eliminated automatically.

Embodiment 5

Intake valve 46 is employed in negative-pressure adsorption component in example 4, as shown in Figure 18,19, the intake valve 46 is used In control air delivering pipeline 47 and the connected state of ambient atmosphere, it is opened only after the drug injection of preset dose is finished, and State is converted to close off before striker assembly reaches the state of loading next time, based on this technical requirements, in the prior art, is used Magnetic valve is easier to realize with sensing element cooperation, but intake valve 46 is such as constituted with magnetic valve and sensing element, then The appurtenances such as wire, power supply must also be equipped with so that the overall structure of this needleless injector is increasingly complex, and cost significantly increases Plus, while increased the fault rate in needleless injector Clinical practice to a certain extent, it is contemplated that these reasons, the present invention is also The implementation method more scientific and reasonable to intake valve 46, concrete structure is as follows：

As shown in Figure 18,19,20,21, the post that cylindrical and two ends communicate with air is provided with described intake valve 46 Plug chamber 55, the plunger 56 for tight cooperation being provided with plunger cavity 55 and being axially movable, the side of plunger cavity 55 is provided 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 closed, connected state is in when plunger 56 is moved rearwardly into intake valve 46 when gas outlet 57 connects with plunger cavity 55； The rear side of plunger 56 is connected with the valve rod 58 for driving and moving it, and the rear end of valve rod 58 is located at the rear of valve body 35；Intake valve 46 is by gun body Support and be located at the front side of bore 18 and the side of the push rod 17 positioned at terminal injecting assembly 1, both valve rod 58 and hammer body 19 Central shaft is parallel, and when intake valve 46 is closed, 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 opening just when tup 20 clashes into and exits bore 18 completely；The elasticity of rear end one of valve rod 58 is drawn Line 54 is connected with the front end of hammer body 19, and before striker assembly reaches the state of loading, shifting makes air inlet after hammer body 19 can draw valve rod 58 Valve 46 is converted to close off state；Flexible pull wire 54 is located at the side of tup 20, and both are 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 Change, therefore the frictional force existed between plunger 56 and plunger cavity 55 should be able to prevent other external force factors from bringing influence, it is to avoid plunger 56 relatively move with plunger cavity 55；It can be improved on plunger 56 by setting up the means of sealing ring between plunger cavity 55 Frictional force, while being also beneficial to ensure the sealing property between plunger 56 and plunger cavity 55；

Thus one, when first micro-injection is carried out, before striker assembly reaches the state of loading, hammer body 19 has been passed through Moved after elastic drag rope reach valve rod 58, intake valve 46 is converted to close off state, now outside air cannot be through intake valve 46, defeated Air pipe 47, air inlet 51 enter in locking cylinder 48, and lockup piston 50 cannot be moved forward, i.e. the lockable negative pressure of lockup piston 50 The position of piston 22, makes to maintain existing negative pressure in negative-pressure adsorption component；Before in the medicine of preset dose, injection is not finished completely, often During secondary micro-injection, tup 20 can not be implemented to clash into or can clash into the tail end of valve rod 58 but cannot order about valve rod to the rear end of valve rod 58 Bore 18 is exited in 58 rear ends completely, and intake valve 46 is still persistently remained off, i.e., lockup piston 50 is persistently to negative pressure piston 22 With locking action；After the drug injection of preset dose is finished, i.e., tup 20 orders about the rear end of push rod 17 of terminal injecting assembly 1 When bore 18 is together exited in the rear end of valve rod 58 with intake valve 46 completely, intake valve 46 will be in opening, 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, and then Relieve the locking action to negative pressure piston 22.

Embodiment 6

In two kinds of improvement designs of absorbent module disclosed in embodiment 3,4, as shown in Figure 14,18, negative-pressure adsorption component It is respectively provided with two kinds of " Batch Adsorption " and " lasting absorption " mode of operation is available and uses, but both embodiments use original Reason is to be locked negative pressure piston 22 in injection process, and the structure of this mode is all complex, by existing conventional portion The difficulty that part is realized is larger, implements to be difficult, therefore, the present invention also provides one kind based on embodiment 1, by existing conventional portion The absorbent module improvement design that part is extremely easily implemented, structure is embodied is：

As shown in figure 22, it is also associated with one in described negative-pressure adsorption component, between safety valve 6 and exhaust end pipeline unidirectional Exhaust pipe 59, is sequentially provided with the unidirectional exhaust pipe 59 of control and atmosphere state from the front to the back on the unidirectional exhaust pipe 59 Relief valve 60, only allow breather cheek valve 61 that air conveys from the front to the back in unidirectional exhaust pipe 59, only allow it is unidirectional Air drains into the exhaust check valve 62 in the external world in exhaust pipe 59；Negative pressure line 5 is provided with one has connection, cut-off two states Switching valve 63, switching valve 63 connect when, negative pressure line 5 be conducting state, when switching valve 63 ends, negative pressure line 5 is in End and negative pressure cylinder 8 is acted to sucker with unidirectional exhaust pipe 59 through safety valve 6；Thus one, negative-pressure adsorption component With " Batch Adsorption " and " lasting absorption " two kinds of mode of operations, i.e.,

" Batch Adsorption " mode of operation：

Switching valve 63 is adjusted to opening, negative pressure device is preferentially connected by negative pressure line 5 with 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., run using the mode of operation of " Batch Adsorption "；

" lasting absorption " mode of operation：

Switching valve 63 is adjusted to cut-off state, is loaded for the first time in operation, negative pressure piston 22 is moved rearwards by, 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 produces suction-operated to body surface, After the completion of micro-injection, negative pressure piston 22 resets forward under the driving of back-moving spring 23, but due on unidirectional exhaust pipe 59 Breather cheek valve 61 and exhaust check valve 62 are provided with, 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 being maintained in sucker, continuation is adsorbed to body surface；Hereafter each During micro-injection, by unnecessary negative pressure removal, negative pressure piston 22 is moved forward safety valve 6 when negative pressure piston 22 is moved rearwards by When influence, i.e. sucker are not constituted on the negative pressure in sucker constant suction-operated are maintained to body surface all the time；Multiple micro-injection When the drug injection that Cheng Zhongxu changes injection point or preset dose is completed, relief valve 60 is opened, outside air through relief valve 60, Unidirectional exhaust pipe 59 enters in sucker, the negative pressure in sucker is disappeared, and sucker no longer produces suction-operated, Jin Erke to body surface Carry out follow-up corresponding operating；

As can be seen here, after negative-pressure adsorption component is designed using this kind, it not only has " Batch Adsorption " and " lasting to inhale It is attached " two kinds of mode of operations are available, and breather cheek valve 61, exhaust check valve 62, switching valve 63 employed in the program It is and relief valve 60 is existing original paper and relatively conventional, implement 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 " mode of operation, before first striker assembly reaches the state of loading, relief valve 60 is by hammer body 19 are ordered about and switch to cut-off state, and only after the drug injection of preset dose is finished, relief valve 60 is ordered about and cut by tup 20 Opening is shifted to, is thus realized after injection is finished, the technical purpose that suction-operated of the sucker to body surface disappears automatically.

Claims

1. a kind of needleless injector that can continuously inject, it is characterised in that it includes：

Gun body, it is made up of the gun rack being fixedly connected with gun barrel, and cylindrical bore is provided with gun barrel, be provided with the upside of bore by The guide groove that gun barrel upper side wall pierces；

Striker assembly, it includes a hammer body for being located in bore and being axially movable, and hammer body front end is provided with the hammer small compared with its diameter Head, upside is fixed with the guide block that extend in guide groove and can be slided along guide groove；Hammer body is persistently moved rearwards by enter striker assembly Row accumulation of energy and reach the state of loading, after striker assembly is excited, energy that hammer body will be stored by striker assembly drives and quickly moves forward, Tup is set to produce shock to front part；

Circulation pulls component, its be placed in gun body and only can one-way circulation operating, it hits during cycle operation by ordering about The hammer reciprocal state of loading that reaches of component is then excited, and striker assembly is circulated with this, and being produced to front part gradually It is raw to clash into；

Trigger component, it is supported by gun body, and it pulls component one-way circulation fortune using artificial external force as input for driving cycle Turn；

Terminal injecting assembly, its front end is provided with injection orifice, and inside is provided with injection ram, drives the push rod of injection ram movement, its Combination is extended in bore in the front end of gun barrel and push rod tail end, and push rod tail end is used to cater to the shock of tup to drive injection to live Plug reach makes terminal injecting assembly implement injection, and stretching into the length in bore by adjusting push rod tail end can realize injection dosage It is default；

Negative-pressure adsorption component, it is made up of negative pressure device and sucker；Negative pressure device includes a negative pressure cylinder, and negative pressure cylinder is fixed on gun barrel Upside and parallel with hammer body, the front end of negative pressure cylinder is suction end, and rear end communicates with air, and negative pressure piston, drive are provided with negative pressure cylinder The pull bar for make the negative pressure piston back-moving spring for moving forward, drawing shifting after negative pressure piston, the rear end of pull bar extends to the rear of negative pressure cylinder； The rear end of pull bar is fixed with one and extends in guide groove and positioned at the connecting lever at guide block rear, when guide block is contacted with connecting lever, guide block to Movement afterwards can drag connecting lever with moving thereafter, and guide block is moved forward then constitute connecting lever and drawn；Sucker is by installation set and disk body Constitute, installation set can be tightly nested with outside terminal injecting assembly, and ensure disk body and terminal injecting assembly center overlapping of axles and disk Body front end face is located at injection orifice front side；Sucker is provided with an exhaust end, and the exhaust end is through negative pressure line and the suction end of negative pressure cylinder Connection；One is installed in negative pressure channel between negative pressure cylinder and sucker prevents the excessive safety valve of negative pressure.

2. a kind of needleless injector that can continuously inject according to claim 1, it is characterised in that：Described terminal injection The outer wall of component leading section be provided with one in a ring evagination and be used to limit the limited step of installation set back-end location；

Described installation set is provided with plurality of specifications according to internal diameter difference, and each installation set can tightly be combined with disk body.

3. a kind of needleless injector that can continuously inject according to claim 1, it is characterised in that：Described safety valve bag A valve body is included, valve pocket is provided with valve body, valve pocket is separated into upper chamber and lower room, upper chamber and big gas phase through a dividing plate with valve opening Logical, negative pressure channel of the lower room then only with negative-pressure adsorption component is communicated；Lower interior is provided with a valve block moving up and down, valve block upside The lower magnetic pole upwardly extended through valve opening is fixed with, the eccentric orfice for piercing it up and down is provided with valve block；Valve body is provided with one Through the screw rod that screw 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 at lower magnetic pole top；Lower room negative pressure is not During more than safety value, upper magnetic post orders about valve block and is close to toroidal membrane with the gravitation of lower magnetic pole, and valve opening is with eccentric orfice by closure Upper chamber and lower room is set to be in cut-off state；When lower room negative pressure is more than safety value, valve block overcome the gravitation of upper magnetic post and lower magnetic pole and Move down, upper chamber and lower room are in connected state；Valve body is separately fixed with one and is located at valve block lower section and is used to limiting valve block descending The spacer pin of position.

4. a kind of needleless injector that can continuously inject according to claim 1, it is characterised in that：Described back end of tie rod A conical head is fixed with, the rear of pull bar is provided with a device for clamping；It is provided with device for clamping and is inserted and by conical head for conical head The locking hole of locking, for release to conical head locking releasing button, device for clamping tail end can by a bearing hinged support Front and rear rotation；Device for clamping can rotate to forward flattened state, and after striker assembly is in loads state, conical head is inserted just Locked in locking hole and by device for clamping, device for clamping can rotate to the state of starting backward, when striker assembly is in state of loading Afterwards, conical head is not produced with device for clamping and contacted.

5. a kind of needleless injector that can continuously inject according to claim 4, it is characterised in that：Described device for clamping Inside be provided with one can it is up and down and by locking hole block tongue piece, tongue piece downside be provided with orders about its upwards reset shell fragment, upside Then through pressing lever and releasing button connects, the holding hole for being available for conical head to pass through is provided with tongue piece, when conical head is in locking hole When being moved rearwards by, it can penetrate in holding hole by taper surface and order about tongue piece and move down, and treat that conical head is fully located at tongue piece rear When, tongue piece is ordered about and upper shifting by shell fragment, and conical head then is locked in into rear side, is such as moved down using releasing button and order about tongue piece Afterwards, the axial movement no longer to conical head is constituted obstruction by holding hole, realizes releasing the locking to conical head with this.

6. a kind of needleless injector that can continuously inject according to claim 4, it is characterised in that：For device for clamping is provided The bearing of support is mounted on the upside of gun barrel with negative pressure cylinder using a removable seat jointly.

7. a kind of needleless injector that can continuously inject according to claim 1, it is characterised in that：Described gun barrel top A locking cylinder for being located at negative pressure cylinder rear is fixed with, locking cylinder front end communicates with air, and rear end is provided with bottom, and lock is provided with its chamber Only piston, locking rod of the lockup piston through extending forward is fixedly connected with pull bar tail end；Locking cylinder, lockup piston, locking rod and Pull bar center overlapping of axles；Locking cylinder bottom is provided with one-way exhaust mouthful and air inlet, and air inlet is through an air delivering pipeline and air inlet Valve is connected；Air delivering pipeline and atmosphere when intake valve is opening, when intake valve is closed mode air delivering pipeline not with greatly Gas phase is led to；Intake valve is installed in gun body, and it is opened only after the drug injection of preset dose is finished, and in percussion hammer group next time Part is converted to cut-off state before reaching the state of loading；Air inlet is another through bypass conduit and atmosphere, is set on bypass line There is switchable and Flow-rate adjustment switch valve.

8. a kind of needleless injector that can continuously inject according to claim 7, it is characterised in that：In described intake valve The plunger cavity that cylindrical and two ends communicate with air is provided with, the plunger for tight cooperation being provided with plunger cavity and being axially movable, Plunger cavity side is provided with the gas outlet being connected with air delivering pipeline；When plunger is located at its stroke rearmost end, gas outlet is sealed by plunger It is stifled and be closed intake valve, when plunger is moved rearwardly into when gas outlet connects with plunger cavity air inlet valve position in connected state State；Plunger rear side is connected with the valve rod for driving and moving it, and valve rod rear end is located at the rear of valve body；Intake valve is supported and position by gun body The side of the push rod in the front side of bore and positioned at terminal injecting assembly, valve rod is parallel with the central shaft of both hammer bodies, works as air inlet The rear end of valve rod is located in bore when valve is closed, and is entered when the rear end of valve rod is clashed into by tup and exits bore completely Air valve is converted to opening just；The flexible pull wire of rear end one of valve rod is connected with hammer body front end, on striker assembly reaches Before thorax state, shifting makes intake valve be converted to close off state after hammer body can draw valve rod；Flexible pull wire is located at tup side, and two Person is parallel.

9. a kind of needleless injector that can continuously inject according to claim 1, it is characterised in that：Described negative-pressure adsorption In component, a unidirectional exhaust pipe is also associated between safety valve and exhaust end pipeline, on the unidirectional exhaust pipe from the front to the back Be sequentially provided with the unidirectional exhaust pipe of control and the relief valve of atmosphere state, only permission air in unidirectional exhaust pipe by preceding The breather cheek valve that conveys backward, air in unidirectional exhaust pipe is only allowed to drain into the exhaust check valve in the external world；In negative pressure line Being provided with one has connection, the switching valve of cut-off two states, and when switching valve is connected, negative pressure line is conducting state, works as switching valve During cut-off, negative pressure line is in cut-off and negative pressure cylinder is acted to sucker with unidirectional exhaust pipe through safety valve.

10. a kind of operating method of the needleless injector that can continuously inject described in claim 1, comprises the following steps：

1) injection dosage is default

2) disinfected before injecting

3) continuous several times micro-injection

Sucker is combined with terminal injecting assembly, hand-held gun body, sucker is buckled on body surface at injection site periphery, and ensure Terminal injecting assembly front end is supported with injection site, drives trigger component operation, and hammer body drives negative pressure piston during rear shifting After move, striker assembly gradually realize loading state when, absorption of the sucker to body surface reaches optimal and orders about injection site and terminal Injecting assembly front end tightly contacts；Hand-held gun body is somewhat outer to move, and 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；It is negative in sucker after striker assembly is excited Pressure gradually weakens, and injection site stress is able to alleviate and make tissue at this be relaxed；Continue to drive trigger component, hammer body will again Moved after secondary, when the negative pressure in sucker is not wholly absent, the negative pressure in sucker gradually increases, and treats that striker assembly is realized loading again After state, injection site is realized tightly contacting again with terminal injecting assembly front end, is ready micro-injection next time； Thus reciprocally carry out multiple micro-injection；

4) injection point is changed

After a micro-injection is completed, it is not eager to drive trigger component operation, makes hammer body temporal persistence in the front portion of bore, treats Negative pressure in sucker disappear and after losing suction-operated to body surface, the relative position of regulation terminal injecting assembly front end and injection site Put, micro-injection next time is then carried out again；

5) drug injection is finished

After the drug injection of preset dose is finished, trigger component operation is no longer driven, hammer body rests on the front portion of bore, sucker In negative pressure gradually weaken until there is no suction-operated to body surface, needleless injector is removed, that is, complete whole injection Operation.