The present invention is the dividing application No. is 201710064022.8 application for a patent for invention submitted on February 04th, 2017Case application.
Summary of the invention
It is convenient and efficient, it can be achieved that large dosage of drug injection the purpose of the present invention is to provide a kind of easy to operate, especially withoutThe needleless injector that need to take the completion that medicine auxiliary device can be fast and simple that medicine is taken to operate by other.
To realize the above-mentioned technical purpose, the present invention adopts the following technical scheme:
A kind of large dosage of needleless injector that can independently take medicine comprising:
Gun body is made of the gun rack and gun barrel being fixedly connected；Cylindrical bore is equipped in gun barrel, the front end of gun barrel passes throughNeck tube is fixed with thread head, and neck tube side wall is equipped with an observation window for being labeled with injection dosage scale, bore, neck tube and thread head threePerson is coaxial；
Striker assembly is made of hammer body, elastic string and push type alarm；Hammer body is limited in bore and only can be axialMobile, the front end of hammer body is equipped with a tup small compared with its outer diameter, and the front end of tup is provided with the shock seat in blind hole shape, before hitting seatA locking hole is provided on the side wall at end, the downside of hammer body is equipped with towing mechanism；Hammer body, tup and shock seat are coaxial with bore；Elastic string is equipped with two, and elastic string and push type alarm are placed in gun body, when hammer body, which is moved rearwardly into, loads state, pressesPressure type alarm issues alarm, and two elastic strings are in tensional state；Hammer body excitation after, will by two elastic strings drive and quickly beforeIt moves, hits seat and shock is generated to front side member；
Circulation pulls component, be placed in gun body and only can one-way circulation operating, during cycle operation, can driveThe state of loading that reaches for keeping striker assembly reciprocal is then excited, and recycles striker assembly with this, and gradually to front side portionPart generates shock；
Trigger component is supported by gun body, taking human as external force as inputting, circulation can be driven to pull component one-way circulationOperating；
Terminal injecting assembly comprising drive rod and the medicine-storing tube and piston for being slidingly sealed cooperation；Medicine-storing tube front end is setThere is injection orifice, rear end is equipped with thread bush；Drive rod can be stretched and can automatic retracted to shortest initial length, front end and workPlug is fixedly connected, and rear end is equipped with the shock portion big compared with driving shank diameter, the retraction force foot that drive rod has in a stretched stateTo drive piston to move backward in medicine-storing tube；Drive rod is equipped with one and constant and big compared with the tup outer diameter limit of plunger distanceBolt, limited bolt outer wall are equipped with position mark；After terminal injecting assembly is combined with gun body, drive rod, shock portion and limited bolt are equalAnd limited bolt and shock portion coaxial with seat is hit extend back through neck tube；Shock portion can protrude into the bottom for hitting in seat and being knocked seatPortion is hit, and piston Forward is then driven to realize injection；The corresponding relationship of position mark and injection dosage scale can reflect shock portionAxial position, and then clearly preset injection dosage；
Take medicine locked component comprising the first sliding groove that opens up on gun barrel along axial direction is fixed on outside gun barrel and with firstThe parallel guide rail of sliding slot, the sliding block that is limited by first sliding groove and guide rail and can be only moved forward and backward are fixed with axial position on sliding blockAdjustable locking pin；Locking pin inner end can be protruded into through locking hole hits in seat and is locked in shock portion and hits in seat, thus slidesBlock, shock portion can be moved back with tup；Locking pin inner end is after bore removal, not to the fortune of striker assembly and terminal injecting assemblyRow constitutes obstacle；
Medicine taking amount assignment component comprising the second sliding slot that opens up on gun barrel along axial direction is fixed on outside gun barrel and withThe parallel screw rod of two sliding slots can be only moved forward and backward with the adjusting nut of screw rod cooperation, by adjusting nut driving along second sliding slotTravelling arm；The inner end of travelling arm is fixedly connected with the block arc being located in bore, and block arc is coaxial with tup；Arc gearBlock internal diameter is greater than the outer diameter of tup, and hammer body side wall is provided with the recessing groove for preventing that block arc is hindered to be moved forward and backward, thus arcBlock and striker assembly will not constitute the interruption of service between each other；Block arc internal diameter be less than limited bolt outer diameter, limited bolt withIt can not continue to move backward after supporting；The side of second sliding slot is equipped with medicine taking amount scale, adjusting nut and medicine taking amount scaleCorresponding relationship can reflect block arc axial position；
Conduit tube component comprising one conduit of bottom of a Capsule, Capsule is connected with syringe needle, and Capsule is salable to be nested withMedicine-storing tube front end and be connected to injection orifice only with syringe needle.
Working principle when large dosage of needleless injector of medicine originally can independently be taken to inject are as follows:
It combines the terminal injecting assembly for being stored with medicament in gun body, position mark and injection is observed by observation windowThe corresponding numerical value of dose calibration, and be adjusted by way of rotating terminal injecting assembly, thus complete the pre- of injection dosageIf；Terminal injecting assembly front end is supported in patient body-surface, drives circulation to pull component circular flow, circulation using trigger componentDragging component drags hammer body first and moves backward, and when striker assembly reaches and loads state, push type alarm issues alarm, behaviourAuthor becomes clear, and circulation, which will pull when component continues to run, to promote striker assembly to excite, after striker assembly excitation excitation, hammer bodyIt is driven by two elastic strings and is quickly moved forward, the final bottom for hitting seat implements to hit to shock portion, and piston, which is pushed, to move forward and makeTerminal injecting assembly complete a micro-injection, circulation pull component cycle operation, and then make terminal injecting assembly efficiently intoThe multiple micro-injection of row, until striker assembly can not continue to drive piston Forward, the drug for so far completing preset dose is infusedIt penetrates.
Working principle when originally large dosage of needleless injector of medicine can independently be taken to take medicine are as follows:
By the combination of terminal injecting assembly in gun body, and its position is adjusted by rotating terminal injecting assembly, it is ensured that drivingThe shock portion of bar tail end, which protrudes into, to be hit in seat and supports with the bottom for hitting seat, is adjusted the position of locking pin, is made in locking pinEnd is protruded into bore and is inserted into locking hole and is locked in shock portion and hits in seat, and thus shock portion and shock seat realize solidFixed connection；Rotating adjusting nut adjusts the corresponding relationship of itself and medicine taking amount scale, i.e., default medicine taking amount；It will be in conduit tube componentCapsule is buckled in the front end of medicine-storing tube, and syringe needle is put into the medicine container for filling medical fluid, and thus conduit tube component is terminal injectionComponent and medicine container establish a medical fluid transfer passage, drive circulation to pull assembly operating using trigger component, circulation is draggedIt drags component and is moved backward hammer body is dragged, while shock portion, sliding block synchronize with tup and move backward, and can produce in medicine-storing tube at this timeNegative pressure is given birth to, the medical fluid in medicine container enters in medicine-storing tube through conduit tube component, but since the negative pressure in medicine-storing tube cannot be timelyRemoval, as shock portion moves backward, drive rod will be stretched, and stop after striker assembly reaches the state of loading to trigger componentOperation, the portion of shock at this time is locked in constant position with tup, and drive rod leans on the retraction force itself having to piston realitySteady and sustained tractive force is applied, the medical fluid in medicine container is gentle to be entered in medicine-storing tube, is moved rearwardly into limited bolt and arcAfter shape block is supported, piston can not continue to move backward, and the medical fluid in terminal injecting assembly, which has had reached, this moment preset takes medicineAmount；Locking pin is pulled out, shock portion is released and hits the locking between seat, drive rod bounces back to initial length, by conduit groupPart removes, that is, completes and entirely medicine is taken to operate.
Furthermore, the upper side wall of the bore is provided with an axially extending guide groove, and the upside of hammer body be equipped withThe guiding rib that sliding slot is slidably matched, one side guide groove and guiding rib cooperate, make hammer body be only axially movable in bore withoutIt can relatively rotate, on the other hand, guide groove and guiding rib cooperate, and hammer body is limited in preset stroke.
Furthermore, the gun body, striker assembly and terminal injecting assembly should have following relationship:
1. when the drug in terminal injecting assembly is in specified maximum reserves and hammer body is in its stroke front end, screw threadSet and thread head can be combined in the case where shock portion does not support and hits seat bottom and connect, and guarantee terminal injecting assembly andGun body firm combination；
2. when thread bush is rotated, to reaching with thread head, minimum distance, medical fluid is emptied completely in medicine-storing tube and hammer body is in itWhen stroke front end, shock portion is supported with shock seat bottom just.
Furthermore, the striker assembly, terminal injecting assembly, take medicine locked component and medicine taking amount assignment component to answerWith following relationship:
1. when hammer body and when the sliding block in medicine locked component being taken to be respectively positioned on the front end of respective stroke, locking pin and locking holeThe two center overlapping of axles；After in locking pin insertion locking hole, sliding block can with moving hammer until hammer body to reach its stroke lastEnd；
2. such as being driven when hammer body, adjusting nut are respectively positioned on respective stroke front end and shock portion is locked in shock seatBar is in initial length, then limited bolt is supported with block arc；When adjusting nut is located at its stroke rearmost end, as limited bolt withBlock arc is supported, then the pharmaceutical quantities in medicine-storing tube reach specified maximum reserves；
3. when shock portion move back to striker assembly with tup reach load state after, drive rod is in stretching and not complete alwaysFull tensional state.
Furthermore, an axis hole is provided on the sliding block, axis hole intersects with the central axis for hitting both seats, axisHole is parallel with the central axis of both locking holes, and locking pin is supported and is axially movable by axis hole, and the diameter of locking pin is less than lockingThe outer end of the internal diameter in hole, locking pin is equipped with shank.
Furthermore, be fixed in the axis hole for locking pin apply resistance damping cushion rubber A, locking pin withDamp cushion rubber A cooperation and can not automatic axial it is mobile.
Furthermore, the drive rod is made of front bar, rear bar and elastic component, and front bar is equal with the outer diameter of rear bar；The front end of front bar is fixedly connected with the piston, and rear end is provided with the grafting chamber of blind hole shape, middle and back be fixed be overlapped with central shaft andThe limited bolt big compared with its diameter；The rear end of rear bar is connected with to be overlapped and the shock portion big compared with its diameter, front end are solid with central shaftSurely there is the core bar being overlapped with central shaft, core bar is inserted into the grafting chamber of front bar and the two axial sliding fit, the front end of core barIt is provided with the containing cavities of blind hole shape backward；Elastic component uses rubber rope or tension spring, and front end is fixedly connected with grafting chamber bottom, rear endIt is fixedly connected with containing cavities bottom, when drive rod is in initial length, that is, front bar and rear bar is supported, elastic component is still in stretchingState.
Furthermore, the adjusting nut is fixedly arranged at the front end with an axle bed being overlapped with central shaft, travelling arm it is outerEnd is equipped with and one is nested with the axle sleeve on axle bed, the axle sleeve and axle bed can relative rotation, but can not axially opposing movement.
Furthermore, the front end outer wall of the adjusting nut is equipped with the secondary scale being distributed along its outer circle, and medicine taking amount is setDetermine the pointer that component is fixed equipped with a position and is used to cooperate with secondary scale, adjusting nut rotates a circle along screw rod, producesRaw axial displacement is a scale unit of medicine taking amount scale.
Compared with prior art, the present invention it has the following beneficial effects: due to that circulation can be driven to drag using trigger componentThe work of component one-way circulation is dragged, and then the state of loading that reaches for driving striker assembly reciprocal then excites, and makes terminal injecting assemblyMultiple micro-injection is efficiently carried out, by the purpose that is cumulative and realizing drug bolus infusion of multiple micro-injection, is overcomePrevious needleless injector is simply possible to use in the deficiency of drug dose injection, has expanded needleless injector in clinical injection fieldApplication range, and it is easy to operate；Originally it can independently take large dosage of needleless injector of medicine to be integrated with and independently take medicine function, through letterIt can carry out taking medicine after single operation setting, and medicine taking amount can flexibly be preset, medicine is taken to be not necessarily to remove terminal injecting assembly in the process,Medical fluid enters the slow of terminal injecting assembly and operates simply, save trouble and labor in the process without artificial interference, and efficiency is higher；It is infusingDuring the operation for penetrating and taking medicine, it is by trigger component, dragging component and striker assembly offer power is provided, not only structureSimply, element usage is high, and overall cost is low, and reduces the difficulty of operation；Due to taking medicine in the process mainly by drive rodRetraction power drive piston moves back, and the tractive force that piston is subject to is lasting, stables, gently, will not structure to terminal injecting assembly andPerformance, which is constituted, to be destroyed；Due to originally can independently take large dosage of needleless injector of medicine without taking the realization of medicine auxiliary device to take medicine,The acquisition cost for reducing user is also beneficial to improve the portability of needleless injector, provide greatly just for userBenefit.
Detailed description of the invention
Fig. 1 is one of the overall structure diagram that originally can independently take large dosage of needleless injector of medicine.
Fig. 2 be originally can independently take large dosage of needleless injector of medicine overall structure diagram two.
Fig. 3 is that originally can independently take the structural schematic diagram after large dosage of needleless injector cross-section of medicine.
Fig. 4 is gun barrel, striker assembly, terminal injecting assembly, medicine locked component and the decomposition of medicine taking amount assignment component is taken to showIt is intended to.
Fig. 5 is one of gun barrel and the structural schematic diagram that component is firmly connected with it.
Fig. 6 is gun barrel and the second structural representation that component is firmly connected with it.
Fig. 7 is the structural schematic diagram of striker assembly.
Fig. 8 is the structural schematic diagram of terminal injecting assembly.
Fig. 9 is to take the structural schematic diagram of sliding block and locking pin in medicine locked component.
Figure 10 is the cooperation schematic diagram of screw rod in medicine taking amount assignment component, adjusting nut, travelling arm and block arc.
Figure 11 be gun barrel, striker assembly, terminal injecting assembly, take medicine locked component and medicine taking amount assignment component to combine afterOne of schematic diagram.
Figure 12 be gun barrel, striker assembly, terminal injecting assembly, take medicine locked component and medicine taking amount assignment component to combine afterThe two of schematic diagram.
Figure 13 is one of the structural schematic diagram that originally can independently take large dosage of needleless injector of medicine to take the medicine initial stage.
Figure 14 is the second structural representation that originally can independently take large dosage of needleless injector of medicine to take the medicine initial stage.
Figure 15 is the cooperation schematic diagram that medicine locked component, terminal injecting assembly and striker assembly are taken during taking medicine.
Figure 16 is structural schematic diagram when originally large dosage of needleless injector of medicine can independently be taken to reach default medicine taking amount.
Figure 17 is the structural schematic diagram of drive rod.
Figure 18 is that adjusting nut adds the structural schematic diagram after secondary scale.
Figure 19 is the structural schematic diagram after drive rod is further improved
In figure, 1, gun barrel, 2, medicine taking amount assignment component, 3, take medicine locked component, 4, neck tube, 5, thread head, 6, thread bush,7, medicine-storing tube, 8, Capsule, 9, conduit, 10, syringe needle, 11, gun rack, 12, trigger component, 13, observation window, 14, injection dosage scale,15, push type alarm, 16, circulation dragging component, 17, drive rod, 18, shock portion, 19, sliding block, 20, locking pin, 21, firstSliding slot, 22, guide rail, 23, elastic string, 24, shock seat, 25, locking hole, 26, tup, 27, hammer body, 28, recessing groove, 29, guidingMuscle, 30, screw rod, 31, second sliding slot, 32, adjusting nut, 33, travelling arm, 34, block arc, 35, medicine taking amount scale, 36, positionTagging, 37, limited bolt, 38, bore, 39, piston, 40, shank, 41, damping cushion rubber A, 42, towing mechanism, 43, axle bed, 44,Axle sleeve, 45, guide groove, 46, grafting chamber, 47, containing cavities, 48, front bar, 49, elastic component, 50, rear bar, 51, core bar, 52, secondaryScale, 53, pointer, 54, damping cushion rubber B.
Specific embodiment
Referring to shown in Fig. 1-3, one kind disclosed in this invention can independently take large dosage of needleless injector of medicine, by rifleBody, striker assembly, circulation pull component 16, trigger component 12, terminal injecting assembly, take medicine locked component 3, medicine taking amount setting groupPart 2 and 9 component of conduit are constituted.
Wherein, referring to shown in Fig. 1,4,5,6, the gun body is made of the gun rack 11 being fixedly connected with gun barrel 1；Gun barrel 1Interior to be equipped with cylindrical bore 38, the front end of gun barrel 1 is fixed with thread head 5 through neck tube 4, and 4 side wall of neck tube is provided with an observation window 13,13 side of observation window is labeled with injection dosage scale 14,5 three center overlapping of axles of bore 38, neck tube 4 and thread head；Gun body is used forPlacement or support other component, and have convenient for hand-held characteristic.
Wherein, referring to Fig. 3, shown in 4,7,11,13, the striker assembly is by hammer body 27, elastic string 23 and push type reportAlert device 15 is constituted；Hammer body 27 is limited in bore 38 and is only axially movable, and hammer body 27 is fixedly arranged at the front end with tup 26, tup 26Outer diameter be less than 27 outer diameter of hammer body, the front end of tup 26 be provided with one be in blind hole shape shock seat 24, hit seat 24 front end be provided withOne locking hole 25 for piercing side wall, the downside of hammer body 27 are equipped with towing mechanism 42, which is used to pull with circulationComponent 16 cooperates；Hammer body 27, tup 26, the center overlapping of axles for hitting seat 24 and bore 38 4；Elastic string 23 is equipped with two,For providing the driving force resetted forward for tup 26；Elastic string 23 and push type alarm 15 are placed in gun body, work as hammerBody 27 is moved rearwardly into when loading state, and push type alarm 15 will be issued and be alarmed, and two elastic strings 23 are in tensional state and haveFlexible potential energy；After hammer body 27 excites, it will be driven by two elastic strings 23 and quickly be moved forward, and hit 24 pairs of front side members of seat and generateIt hits.
Wherein, shown in referring to Fig. 3, the circulation pulls component 16 and is placed in gun body, only can one-way circulation operating,It can drive the hammer body 27 in striker assembly to move backward in bore 38, then be excited, made during cycle operationStriker assembly is recycled with this, and generating to front side member gradually is hit, and is thus provided required for injection for terminal injecting assemblyPower.
Wherein, shown in referring to Fig. 3, the trigger component 12 is supported by gun body, taking human as external force as inputting, can be drivenDynamic circulation pulls the operating of 16 one-way circulation of component.
Wherein, referring to shown in Fig. 2,3,4,8,11, the terminal injecting assembly includes drive rod 17, medicine-storing tube 7 and livesPlug 39, piston 39 is located in medicine-storing tube 7 and the two is slidingly sealed cooperation；7 front end of medicine-storing tube is equipped with injection orifice, and rear end is equipped with screw threadSet 6, thread bush 6 can combine with thread head 5 and realize terminal injecting assembly with gun body and combine connection；Drive rod 17 can be stretchedAnd can automatic retracted to shortest initial length, can not can not continue to shorten when drive rod 17 is in initial length, drive rod 17Front end is fixedly connected with piston 39, and rear end is fixed with a shock portion 18, and shock portion 18 is big compared with the diameter of drive rod 17, drive rod 17The retraction force having in a stretched state is enough that piston 39 is driven to move backward in medicine-storing tube 7；Drive rod 17 is equipped with oneWith the limited bolt 37 of 39 constant distance of piston, between limited bolt 37 and shock portion 18 are still kept when drive rod 17 is in initial lengthAway from limited bolt 37 is big compared with the outer diameter of tup 26, and 37 outer wall of limited bolt is equipped with position mark 36；When terminal injecting assembly and gun body groupAfter conjunction, drive rod 17, shock portion 18, limited bolt 37, the center overlapping of axles for hitting seat 24 4, limited bolt 37 and shock portion 18 are passed throughNeck tube 4 extends back；Shock portion 18 can protrude into the bottom shock for hitting in seat 24 and being knocked seat 24, before then driving piston 39It moves and realizes injection；The corresponding relationship of position mark 36 and injection dosage scale 14 can reflect shock portion under 17 initial length of drive rod18 axial position, and then clearly preset injection dosage.
Wherein, referring to Fig. 3, shown in 4,5,9,11,12,13,15, it is described take medicine locked component 3 include first sliding groove 21,Guide rail 22 and sliding block 19, first sliding groove 21 axially extend on gun barrel 1 and pierce the side wall of gun barrel 1, and guide rail 22 is fixed on riflePipe 1 is outer and parallel with first sliding groove 21, and sliding block 19 is limited by first sliding groove 21 with guide rail 22 and can be only moved forward and backward；On sliding block 19It is fixed with the adjustable locking pin 20 of axial position；20 inner end of locking pin can be protruded into through locking hole 25 hits in seat 24 and will hit portion18 are locked in shock seat 24, and thus sliding block 19, shock portion 18 can be moved backward with tup 26；20 inner end of locking pin is from bore 38After removal, obstacle is not constituted to the operation of striker assembly and terminal injecting assembly.
Wherein, referring to shown in Fig. 4,6,10,12,13,15, the medicine taking amount assignment component 2 includes second sliding slot 31, spiral shellBar 30, adjusting nut 32 and travelling arm 33, second sliding slot 31 axially extend on gun barrel 1 and pierce the side wall of gun barrel 1, screw rod30 are fixed on that gun barrel 1 is outer and parallel with second sliding slot 31, and adjusting nut 32 and screw rod 30 are threadedly engaged and then pass through and rotate and can produceRaw axial displacement, travelling arm 33 are driven by adjusting nut 32 and can and can be only moved forward and backward along second sliding slot 31；Travelling arm 33Inner end passes through second sliding slot 31 and enters in bore 38, and is fixedly connected with the block arc 34 being located in bore 38, the arcThe center overlapping of axles of 26 the two of shape block 34 and tup；The internal diameter of block arc 34 is greater than the outer diameter of tup 26, and 27 side of hammer bodyWall is provided with the recessing groove 28 for preventing that block arc 34 is hindered to be moved forward and backward, and thus block arc 34 and striker assembly be not between each otherThe interruption of service can be constituted；The internal diameter of block arc 34 be less than limited bolt 37 outer diameter, limited bolt 37 with its support after can not continueIt moves backward, thus block arc 34 can limit the terminal location of limited bolt 37；It is carved equipped with medicine taking amount the side of second sliding slot 31The corresponding relationship of degree 35, adjusting nut 32 and medicine taking amount scale 35 can reflect 34 axial position of block arc, and then whereby can be pre-If medicine taking amount.
Wherein, referring to shown in Fig. 1,2,9 component of conduit includes a Capsule 8, one conduit 9 of bottom of Capsule 8 withSyringe needle 10 is connected, and salable be nested with of Capsule 8 is connected to injection orifice only with syringe needle 10 in 7 front end of medicine-storing tube.
As shown in Figure 1, 2, 3, in the above-mentioned large dosage of needleless injector that can independently take medicine, the specific structure of gun rack 11And the matching relationship with gun barrel 1, the matching relationship of 15 three of hammer body 27, elastic string 23 and push type alarm, elastic string 23 are pressedThe matching relationship of pressure type alarm 15 and gun body, circulation pull the specific structure of component 16, trigger component 12, and circulation pulls component16, trigger component 12, hammer body 27 and gun body respectively between matching relationship, it is special in the invention application No. is 2016109677793In a kind of needleless injector disclosed in benefit, has description in detail, be considered as the prior art, so there is no need to repeat.
Referring to shown in Fig. 2,4,8,11, in the above-mentioned large dosage of needleless injector that can independently take medicine, hammer body 27 is limitedIt is scheduled in bore 38, therefore the stroke foremost position of hammer body 27 is fixed and invariable, when hammer body 27 reaches the front end of its strokeWhen, it can not continue to move forward and can not continue that shock portion 18 is implemented to hit, then complete entire injection, i.e. per injection is completeFinal position at rear shock portion 18 is clear and invariable；After terminal injecting assembly is combined with gun body, before the injection, driveThe shock portion 18 of 17 rear end of lever not will receive tractive force backward, therefore drive rod 17 keeps initial length, shock portion 18, limitBolt 37 and piston 39 keep relatively fixed, pass through the injection dosage scale at the position mark 36 and observation window 13 on limited bolt 37Cooperation between 14 is able to reflect the relative axial position in shock portion 18 and gun barrel 1 when injecting initial, i.e., clearly hits before injectionThe initial point position in portion 18；From this point of view, before the injection, can be reflected by position mark 36 and the cooperation of injection dosage scale 14The displacement that shock portion 18 can generate in next injection process, the i.e. producible displacement of piston 39, based on above-mentionedRelationship is calculated quantization when designing injection dosage scale 14, the corresponding injection dosage scale of position mark 36 when making default14 numerical value is exactly injection dosage and is easily achieved.
Referring to shown in Fig. 4,8,16, in the above-mentioned large dosage of needleless injector that can independently take medicine, before taking medicine to operate,Hammer body 27 is located at the front end of its stroke, and after terminal injecting assembly is combined with gun body, shock portion 18 is taken medicine locked component 3 and hitSeat 24 is hit to be attached, axial position locating for the portion of shock at this time 18 is specific, simultaneously because hit seat 24 be also not affected byTractive force afterwards, drive rod 17 is in initial length, therefore the axial position of limited bolt 37 is also explicitly, i.e., to take medicine to operate every timeIn, the initial point position of limited bolt 37 is clear and constant；In medicine taking amount assignment component 2, adjusting nut 32, travelling arm 33 andThe axial position of block arc 34 is relatively fixed always, can be reflected by adjusting nut 32 and the corresponding relationship of medicine taking amount scale 35The axial position of block arc 34, due in taking medicine operating process, limited bolt 37 with the retraction of drive rod 17 and gradually toAfter move, can not continue to move back after it is supported with block arc 34, that is, complete and entirely medicine is taken to operate, i.e., by adjust spiral shellMother 32 can be reflected with the corresponding relationship of medicine taking amount scale 35 take medicine every time after the completion of limited bolt 37 final position；From this point of view,It can be reflected by the corresponding relationship of adjusting nut 32 and medicine taking amount scale 35 and next take limited bolt 37 in medicine operating processThe displacement that generated displacement, i.e. piston 39 generate is based on above-mentioned relation, is calculated when designing medicine taking amount scale 35Quantization, the numerical value of the corresponding medicine taking amount scale 35 of adjusting nut 32 is exactly the medicine taking amount of terminal injecting assembly acquisition when making defaultIt is easily achieved.
Referring to shown in Fig. 4,13,14, in the above-mentioned large dosage of needleless injector that can independently take medicine, hammer body 27 is compared with tup26 outer diameters are big, are on the one hand intended to, so that hammer body 27 is easier to realize with being slidably matched for bore 38, are on the other hand intended to, haveConducive to the volume for improving hammer body 27, its quality is promoted indirectly, guaranteeing that hammer body 27 and tup 26 are enough to drive by inertia can be autonomousLarge dosage of needleless injector of medicine is taken to complete each micro-injection.
Working principle when large dosage of needleless injector of medicine originally can independently be taken to inject are as follows:
Referring to Fig. 3, it shown in 4,11,12, combines the terminal injecting assembly for being stored with medicament in gun body, passes through observation window13 to observe the numerical value corresponding with injection dosage scale 14 of position mark 36, and is carried out by way of rotating terminal injecting assemblyIt adjusts, thus completes the default of injection dosage；Terminal injecting assembly front end is supported in patient body-surface, is driven using trigger component 12Dynamic circulation pulls 16 circular flow of component, and circulation dragging component 16 drags hammer body 27 first and moves backward, reaches to striker assemblyWhen state of loading, push type alarm 15 issues alarm, and operator becomes clear, and circulation pulls will promote when component 16 continues to runExcite striker assembly, after striker assembly excitation excitation, hammer body 27 is driven by two elastic strings 23 and quickly moved forward, and finally hits seat24 bottom implements to hit to shock portion 18, and piston 39, which is pushed, to move forward and terminal injecting assembly is made to complete a micro-injection,Circulation pulls 16 cycle operation of component, and then terminal injecting assembly is made efficiently to carry out multiple micro-injection, until striker assemblyIt can not continue that piston 39 is driven to move forward, so far complete the drug injection of preset dose.
Working principle when originally large dosage of needleless injector of medicine can independently be taken to take medicine are as follows:
Referring to shown in Fig. 2,3,11,13,14,15,16, by the combination of terminal injecting assembly in gun body, and pass through rotation eventuallyEnd injecting assembly adjusts its position, it is ensured that the shock portion 18 of 17 tail end of drive rod protrudes into the bottom hit in seat 24 and with shock seat 24Portion supports, and adjusts the position of locking pin 20, protrudes into the inner end of locking pin 20 in bore 38 and is inserted into locking hole 25 and will hitIt hits portion 18 and is locked in and hit in seat 24, thus shock portion 18 realizes with shock seat 24 and is fixedly connected；Rotating adjusting nut 32 makesIt drives block arc 34 that axial displacement occurs, and is completed by observation adjusting nut 32 and the corresponding relationship of medicine taking amount scale 35Medicine taking amount is default；Capsule 8 in 9 component of conduit is buckled in the front end of medicine-storing tube 7, syringe needle 10 is put into the medicament for filling medical fluidIn container, thus 9 component of conduit is that terminal injecting assembly and medicine container establish a medical fluid transfer passage；Utilize trigger groupThe driving circulation of part 12 pulls component 16 and runs, and circulation pulls component 16 and moves backward hammer body 27 is dragged, while shock portion 18, slidingBlock 19 is synchronized with tup 26 and is moved backward, and can generate negative pressure in medicine-storing tube 7 at this time, and the medical fluid in medicine container is through 9 groups of conduitPart enters in medicine-storing tube 7, but due to the negative pressure in medicine-storing tube 7 cannot timely removal, as shock portion 18 moves backward, drivingBar 17 will be stretched, and stop the operation to trigger component 12 after striker assembly reaches the state of loading, the portion 18 of shock at this time is with hammerFirst 26 are locked in constant position, and drive rod 17 leans on the retraction force itself having to implement steady and sustained traction to piston 39Power, medical fluid in medicine container is gentle to be entered in medicine-storing tube 7, is moved rearwardly into limited bolt 37 and is supported with block arc 34Afterwards, piston 39 can not continue to move backward, and the medical fluid in terminal injecting assembly has had reached preset medicine taking amount this moment, adjust lockThe position of tight pin 20 releases the locking to shock portion 18, shock portion 18 and hits seat 24 and is detached from, and 17 automatic retracted of drive rod is extremelyInitial length removes 9 component of conduit, that is, completes and entirely medicine is taken to operate.
In the large dosage of needleless injector that originally can independently take medicine, since circulation dragging group can be driven using trigger component 12The work of 16 one-way circulation of part, and then the state of loading that reaches for driving striker assembly reciprocal then excites, and keeps terminal injecting assembly fastThe prompt multiple micro-injection of carry out, by the purpose that is cumulative and realizing drug bolus infusion of multiple micro-injection.
Have in the large dosage of needleless injector that originally can independently take medicine, and take medicine locked component 3 by adding fromMaster takes medicine function, has medicine taking amount preset function and adding medicine taking amount assignment component 2, thus after simple operations are arrangedIt can carry out taking medicine, and medicine taking amount can flexibly be preset, easy to operate, save trouble and labor；In the mistake for the operation for injecting and taking medicineCheng Zhong is that component 16 and striker assembly offer power are pulled by trigger component 12, circulation, and element usage is high, overall costIt is low；During taking medicine, piston 39 mainly by the retraction power drive of drive rod 17, the tractive force that piston 39 is subject to is lasting, it is stable,Gently, will not structure to terminal injecting assembly and performance constitute and destroy；Medicine is taken without additional when due to taking medicine to operateAuxiliary device reduces acquisition cost, improves the portable performance of needleless injector.
Furthermore, it referring to shown in Fig. 4,7,11,13, in the large dosage of needleless injector that originally can independently take medicine, hammers into shapeBody 27 is limited in bore 38 and is only axially movable, which has numerous embodiments, such as in the upside of bore 38Wall is provided with an axially extending guide groove 45, and the upside of hammer body 27 is equipped with the guiding rib 29 being in sliding fit with the sliding chute, on the one handGuide groove 45 and guiding rib 29 cooperate, and are axially movable hammer body 27 only in bore 38 without relatively rotating, anotherAspect, guide groove 45 and guiding rib 29 cooperate, and hammer body 27 is limited in preset stroke.
Furthermore, referring to shown in Fig. 4,8,11,12, in the large dosage of needleless injector that originally can independently take medicine, it isEnsure its can safety and stability completion injection work, the gun body, striker assembly and terminal injecting assembly should have as followsRelationship:
1. when the drug in terminal injecting assembly is in specified maximum reserves and hammer body 27 is in its stroke front end, spiral shellLine set 6 can be combined in the case where shock portion 18 does not support and hits 24 bottom of seat with thread head 5 and connect, and guarantee that terminal is infusedComponent and gun body firm combination are penetrated, thus one, it is ensured that terminal injecting assembly can be combined in specified maximum reserves with gun body,And any adjusting of injection dosage can be carried out, while also assuring that terminal injecting assembly can be not in the state of loading in striker assemblyWhen combined with gun body, improve the portable performance that originally can independently take large dosage of needleless injector of medicine.
2. when to reaching with thread head 5, minimum distance, medical fluid is emptied completely and hammer body 27 rotation of thread bush 6 in medicine-storing tube 7When in its stroke front end, shock portion 18 is supported with shock 24 bottom of seat just；Even if striker assembly works on, seat is hit24 can not also drive shock portion 18 to move forward；Thus one, it on the one hand ensure that the large dosage of needleless injector that originally can independently take medicineWhen work, the drug in medicine-storing tube 7 can be completely injected, and on the other hand then ensure that the drug injection in medicine-storing tube 7 finishesAfterwards, even if striker assembly works on, the impact force generated will not damage terminal injecting assembly.
Furthermore, referring to shown in Fig. 4,13,14,16, in the large dosage of needleless injector that originally can independently take medicine, it isEnsure its can efficient and convenient completion take medicine to work, the striker assembly, terminal injecting assembly, take medicine locked component 3 andMedicine taking amount assignment component 2 should have following relationship:
1. when hammer body 27 and when the sliding block 19 in medicine locked component 3 being taken to be respectively positioned on the front end of respective stroke, locking pin 20Locking hole 25 efficiently can be inserted into 20 inner end of locking pin thus when carrying out taking medicine with both locking hole 25 center overlapping of axlesIn, and then shock portion 18 is locked in and is hit in seat 24；After being inserted into locking hole 25 such as locking pin 20, sliding block 19 can be with tup 26Movement is until hammer body 27 reaches its stroke rearmost end.
2. when hammer body 27, adjusting nut 32 be respectively positioned on respective stroke front end and shock portion 18 be locked in hit seat 24 inWhen, if drive rod 17 is in initial length, then limited bolt 37 is supported with block arc 34；When adjusting nut 32 is located at its stroke mostWhen rear end, if limited bolt 37 and block arc 34 are supported, then the pharmaceutical quantities in medicine-storing tube 7 reach specified maximum reserves；Thus oneCome, medicine taking amount assignment component 2 can meet zero to the default of any medicine taking amount between the specified maximum reserves of medicine-storing tube 7, simultaneously alsoIt can avoid piston 39 excessively to move back and the dose in medicine-storing tube 7 is made to be more than specified maximum reserves.
3. when shock portion 18 move back to striker assembly with tup 26 reach load state after, drive rod 17 is always in stretchingAnd it is not completely stretched state, and thus one, drive rod 17 is that tractive force provided by piston 39 can meet the dynamic of any medicine taking amountForce request.
Furthermore, it referring to shown in Fig. 9,13,14,15, in the large dosage of needleless injector that originally can independently take medicine, locksTight pin 20 is supported by sliding block 19, and 20 inner end of locking pin can be protruded into through locking hole 25 hits in seat 24 and be locked in shock portion 18 and hitIt hits in seat 24, and 20 inner end of locking pin is not constituted the operation of striker assembly and terminal injecting assembly after the removal of bore 38Obstacle；Based on this technical purpose, the fit form of locking pin 20 and sliding block 19 has various structures, can such as be provided on sliding block 19One axis hole, axis hole intersect with the central axis for hitting both seats 24, and axis hole is parallel with the central axis of both locking holes 25, lockingPin 20 is supported and is axially movable by axis hole, and the diameter of locking pin 20 is less than the internal diameter of locking hole 25, and the outer end of locking pin 20 is setPelmatozoa 40, thus one, technical purpose above-mentioned can be realized.
Meanwhile as shown in figure 15, it originally can independently take large dosage of needleless injector of medicine during injecting and taking medicine, lockTight pin 20 must be adjusted to and maintain corresponding axial position, can ensure that injects and take medicine to operate goes on smoothly, therefore lockTight pin 20 should have certain lock function, after artificially being adjusted to its position, be able to maintain that in the position and cannot be automaticIt is mobile, for this purpose, the damping cushion rubber A41 for applying resistance to locking pin 20 is fixed in the axis hole, locking pin 20 and resistanceBuddhist nun's cushion rubber A41 cooperation and can not automatic axial it is mobile.
Furthermore, referring to shown in Fig. 4,8,13, in the large dosage of needleless injector that originally can independently take medicine, drive rod17 have dual function be initial length in injection process, can not continue to shorten, thus shock portion 18 can be subject toImpact force passes to piston 39 and promotes terminal injecting assembly implementing injection；It during taking medicine, is first stretched, by percussion hammer groupPart is stored as the potential energy of itself to the tractive force that it is generated, and the retraction force then having in a stretched state by it is to piston39 implement stable, gentle traction, and realization takes medicine；Based on this technical purpose, drive rod 17 is relatively easy to reality using the prior artIt is existing.But meanwhile it originally can independently take large dosage of needleless injector of medicine to the also other technical requirements of drive rod 17, such as drive rod17 initial length is unsuitable too long, so as to originally can independently take the structure of large dosage of needleless injector of medicine more compact；And due toDuring entirely taking medicine, shock portion 18 need to be moved backward with tup 26 until striker assembly reaches the state of loading, shock portion 18The displacement of generation is larger, i.e., drive rod 17 should have biggish telescopic extensions again；And in order to guarantee that drive rod 17 is stretching shapeGentle to the tractive force of the application of piston 39, stable under state, retraction force should tend to be balanced；Preferably to reach above-mentioned technology effectFruit, in the present invention, drive rod 17 is using such as flowering structure:
Referring to shown in Fig. 8,13,14,17, drive rod 17 is made of front bar 48, rear bar 50 and elastic component 49, and front bar 48 is with afterThe outer diameter of bar 50 is equal；The front end of front bar 48 is fixedly connected with piston 39, and rear end is provided with the grafting chamber 46 of blind hole shape, and middle and back is solidSurely have and be overlapped with central shaft and the limited bolt 37 big compared with its diameter；The rear end of rear bar 50 be connected be overlapped with central shaft and compared withThe big shock portion 18 of its diameter, is fixedly arranged at the front end with the core bar 51 being overlapped with central shaft, and core bar 51 is inserted into the grafting chamber of front bar 48In 46 and the two axial sliding fit, the front end of core bar 51 are provided with the containing cavities 47 of blind hole shape backward；Elastic component 49 uses rubberRope or tension spring, front end are fixedly connected with 46 bottom of grafting chamber, and rear end is fixedly connected with 47 bottom of containing cavities, at drive rod 17When initial length, that is, front bar 48 and rear bar 50 are supported, elastic component 49 is still in tensional state.Drive rod 17 is using the above structureAfterwards, can be stretched and can automatic retracted to initial length, and its initial length will not be too long, but has biggish telescopic extensions,Simultaneously because elastic component 49 is located in grafting chamber 46 and containing cavities 47, it ensure that elastic component 49 has biggish length, it is ensured that driveThe retraction force equalization stable that lever 17 has in a stretched state.
Furthermore, it referring to shown in Figure 10,13,14, in the large dosage of needleless injector that originally can independently take medicine, adjustsNut 32 is threadedly engaged with screw rod 30, can produce axial displacement by rotation, and then travelling arm 33 can be driven sliding along secondSlot 31 is moved forward and backward, and plays the purpose of adjustment 34 axial position of block arc, the cooperation of adjusting nut 32 and travelling arm 33 indirectlyStructure can be realized using the prior art, sliding such as the axle bed 43 being overlapped with central shaft that is fixedly arranged at the front end with of adjusting nut 32The outer end of swing arm 33 is equipped with and one is nested with the axle sleeve 44 on axle bed 43, the axle sleeve 44 and axle bed 43 can relative rotation, but can not axisTo relative movement.
Furthermore, referring to shown in Figure 13,14,16, in the large dosage of needleless injector that originally can independently take medicine, secondThe side of sliding slot 31 is equipped with medicine taking amount scale 35, and adjusting nut 32 and the corresponding relationship of medicine taking amount scale 35 can reflect block arc34 axial positions, and then medicine taking amount can be preset before taking medicine operation, it realizes the mechanism that this function is based on, has in frontDetailed discussion.But since the internal diameter of medicine-storing tube 7 is larger, the lesser axial displacement of piston 39 can make medicine taking amount generate biggish changeChange, therefore, it is default such as only to carry out medicine taking amount by the corresponding relationship of adjusting nut 32 and medicine taking amount scale 35, the precision that is bound to compared withIt is low, and error is larger, for this purpose, the present invention also has following improvement:
Furthermore, show referring to Figure 18, the front end outer wall of the adjusting nut 32 is equipped be distributed along its outer circle twoSecondary scale 52, medicine taking amount assignment component is equipped with the pointer 53 that a position is fixed and is used to cooperate with secondary scale 52, such as pointer52 can be labeled on axle sleeve 44, and adjusting nut 32 rotates a circle along screw rod 30, and the axial displacement generated is medicine taking amount scale35 scale unit can carry out medicine taking amount by adjusting nut 32 and medicine taking amount scale 35 rough thus before taking medicineIt is default, the cooperation of secondary scale 52 and pointer 53 is then recycled, medicine taking amount is finely preset.
Furthermore, referring to shown in Figure 16, in taking medicine operating process, when the medical fluid in terminal injecting assembly has reachedPreset medicine taking amount adjusts the position of locking pin 20 to release the locking to shock portion 18, since drive rod 17 is still in drawingState is stretched, such as rear bar 50 moves forward too fast in retraction process, certain shock will certainly be generated to front bar 48, and make piston39 generate micro Forward, on the one hand will affect the accuracy of the final medicine taking amount of terminal injecting assembly, are on the other hand also easy to causeMedical fluid oozes out from injection orifice and causes drug waste, to prevent the hair of above situation from occurring, knot of the present invention to drive rod 17Structure also has following improvement:
I.e. referring to a damping cushion rubber B54 shown in Figure 19, is fixed in the grafting chamber 46 of the front bar 48, cushion rubber is dampedB54 can generate resistance to the axial movement of core bar 51, guarantee in 17 retraction process of drive rod, and rear bar 50 and core bar 51 are slow forwardIt is mobile, to reduce the shock generated to front bar 48.