CN109550119A

CN109550119A - Needleless injector terminal injecting assembly drug taking device

Info

Publication number: CN109550119A
Application number: CN201910113685.3A
Authority: CN
Inventors: 王才丰
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-09
Filing date: 2016-12-09
Publication date: 2019-04-02
Also published as: CN109550118A; CN109550117A; CN109550120A; CN106540361B; CN106540361A; CN109550121A; CN109550116A

Abstract

The invention discloses a kind of needleless injector terminal injecting assembly drug taking devices, quantitatively pull part by conduit tube component, pedestal, terminal injecting assembly fixed part and push rod and constitute；Conduit tube component is used for will be in the medical fluid input terminal injecting assembly in drug reservoir；Terminal injecting assembly fixed part can be implemented to limit to terminal injecting assembly main part, and glue bowl is driven to dock with terminal injecting assembly end part seal；Push rod, which quantitatively pulls part, to store the external force artificially applied by the stretching of telescopic rod, implement to pull to push rod by contraction performance, and can adjust the drawing amount to push rod as needed.When taking medicine by this drug taking device, medical fluid is not necessarily to manual operation during entering terminal injecting assembly, reduces the burden of user, time saving and energy saving, and ensure that traction force suffered by push rod is gently stablized, and avoids and damages to terminal injecting assembly；It can preset medicine taking amount and accuracy is high；It is simple for structure, implement to be easy, it is low in cost, it is easy to carry.

Description

Needleless injector terminal injecting assembly drug taking device

The present invention is the dividing application No. is 201611129063.2 application for a patent for invention submitted on December 09th, 2016 Case application.

Technical field

The present invention relates to a kind of fitting of medical apparatus more particularly to a kind of medical needleless injector terminal injecting assemblies of auxiliary Complete the drug taking device for taking medicine to operate.

Background technique

Needleless injection is a kind of punctures without syringe needle and reaches drug injection purpose novel injection technology, and having can subtract The pain and fear of few drug injection reduce bacterium infection risk, avoid syringe needle from the generations of accidents such as scratching and fracture, drug The advantages that absorption is fast, and long-time service does not subcutaneously play scleroma, and injection efficiency is high, and then have in future clinical medical treatment and widely answer Use prospect.But operation is relatively complicated before pre- before traditional needleless injector per injection, time-consuming and laborious, can not efficiently into Line Continuity injection, and injection dosage is made to become the short slab of existing needleless injector, it can typically be only used to small dose of insulin etc. The clinical injection of drug is measured, and is not used to the clinical injection of the drugs such as the slightly larger antibiotic of dosage, interferon, so that traditional nothing Application of the needle injection in clinical injection field has biggish limitation.Application No. is 2016109677793 patents of invention A kind of needleless injector is disclosed, component, trigger component and terminal injecting assembly structure are pulled by gun body, striker assembly, circulation At, circulation can be driven to pull component continuous operation by trigger component, and recycling dragging component continuous operation can drive in the process Striker assembly efficiently gradually reciprocal completion " loading " and " excitation " movement, and it is more to realize terminal injecting assembly can quickly Secondary micro-injection, by the cumulative large bolus injection for realizing drug of multiple micro-injection, which overcome previous tradition to produce The deficiency of product has expanded needleless injector in the application range in clinical medicine injection field, and then has had broad application prospects.

In above-mentioned patented technology, terminal injecting assembly is the important structure of needleless injector for storing and discharging drug At part, as shown in Figure 1, the terminal injecting assembly is mainly made of medicine-storing tube 5, piston 6 and push rod 2,5 front end of medicine-storing tube is equipped with Injection orifice 4, rear end are equipped with for the thread bush 3 with gun body group even, and 2 rear end of push rod is equipped with the shock portion 1 for being hit by hammer body, From the point of view of structure by the terminal injecting assembly, prescription formula is taken using identical with traditional needle-free injectors, i.e., is pulled back manually Push rod and drive piston to move back, make at injection orifice generate negative pressure, realization take medicine to have no difficulty.But in general, in order to realize compared with Good injection effect, the injection orifice of existing terminal injecting assembly mostly use micropore to design (micron order), and drug is into medicine-storing tube Inflow velocity it is slow, required negative pressure is larger, when carrying out taking medicine using traditional manual mode, operate it is time-consuming and laborious, efficiency compared with It is low, there is certain inconvenience；It during taking medicine, takes drug effect rate in order to improve and often pulls push rod backward with sudden force, be easy Sealing cooperation to the connection between push rod and piston and between piston and medicine-storing tube damages, and reduces terminal injection group The job stability and service life of part；In addition, the advance of the needleless injector as disclosed in aforementioned patent is drug Large bolus injection, the capacity of medicine-storing tube and the dose prestored are all relatively in the past big, are presented during medicine using take manually Inconvenience out is more prominent.In the prior art, there has been no the terminal injecting assemblies with above-mentioned needleless injector to match, behaviour It is convenient to make, time saving and energy saving, and the drug taking device for taking medicine high-efficient occurs.

Summary of the invention

The purpose of the present invention is to provide a kind of terminal injecting assembly uses for cooperating needleless injector, and can be rapidly and efficiently Completion takes medicine to operate, and operates convenient, time saving and energy saving, the drug taking device that especially suitable large capacity medicine-storing tube large dosage takes medicine to operate.

To realize the above-mentioned technical purpose, the present invention adopts the following technical scheme:

A kind of needleless injector terminal injecting assembly drug taking device comprising:

Conduit tube component is made of glue bowl and the syringe needle connected through conduit, and glue bowl bottom is provided with medicine feeding hole, and medicine feeding hole is through leading Pipe is communicated with syringe needle, and glue bowl is used to seal cooperation with terminal injecting assembly front end and connect injection orifice only with glue bowl medicine feeding hole It is logical；

Pedestal, it is in long strip, for providing support for other component；

Terminal injecting assembly fixed part, is made of hold-down mechanism and limiting plate；Limiting plate is fixed on the upside of pedestal, is used In being provided with U-shaped hole on the breech face for the thread bush for supporting terminal injecting assembly, limiting plate so that the push rod of terminal injecting assembly is worn It crosses and can continue to extend back；Hold-down mechanism is located at the front side of limiting plate, is made of pressure cap and pedestal；Pedestal is fixed on pedestal Upside and provide support for pressure cap, and be moved forward and backward pressure cap can in a certain range；The rear end face of pressure cap has for accommodating The ball impression of glue bowl is provided with the centre bore passed through for conduit on pressure cap, is equipped with the ejection bullet for driving it to reset backward on front side of pressure cap Spring；Under the ejection of pushing top spring, the front end of glue bowl and terminal injecting assembly can be fixed for pressure cap, and drive glue bowl and end The front end of injecting assembly is held to seal cooperation；

Push rod quantitatively pulls part, and the rear side of terminal injecting assembly fixed part is arranged in comprising one by pedestal branch The guide sleeve of support, define in guide sleeve one can be moved forward and backward along guide sleeve and can automatic retracted telescopic rod；Before telescopic rod End and guide sleeve can not relative rotation, and its telescopic rod front end extends in front of guide sleeve and with one for clamping terminal injection group The catch mechanism in the shock portion of part is fixedly connected, telescopic rod and pressure cap center overlapping of axles；The side wall of guide sleeve is provided with front and back and extends Guide groove, the rear end of telescopic rod be connected with can along guide groove slide shank, the outer end of the shank extends to outside guide sleeve through guide groove Portion；Guide sleeve is equipped with a retaining mechanism that can lock flexible rod rear end；When hitting for catch mechanism clamping terminal injecting assembly Hit portion, flexible rod rear end be locked mechanism locking when, telescopic rod can be implemented the push rod of terminal injecting assembly in tensional state Drawing；The front end of guide sleeve is equipped with the threaded portion big compared with its diameter, and an external thread sleeve is nested with outside telescopic rod and and threaded portion Cooperation, external thread sleeve by rotation adjustable axial position, external thread sleeve be used to limit terminal location that catch mechanism moves backward and Play the role of adjusting the push rod drawing amount of terminal injecting assembly, the outer wall of guide sleeve is equipped with scale, and external thread sleeve tail end institute is right The scale numerical value answered supports the dose sucked in rear terminal injecting assembly by catch mechanism and external thread sleeve front end.

The operating method and working principle of this needleless injector terminal injecting assembly drug taking device are as follows: hand-held shank adjusts flexible The position of bar, makes catch mechanism be moved to forefront, and the glue bowl of conduit tube component is placed in the ball impression on rear side of pressure cap, and is made The conduit that glue bowl is connected passes through the centre bore of pressure cap and extends in front of pressure cap, holds pressure cap Forward, makes pressure cap and limiting plate Terminal injecting assembly is placed with enough spacing, and the main part (thread bush and medicine-storing tube) of terminal injecting assembly is placed On front side of limiting plate, and ensure that push rod makes shock portion by catch mechanism institute clamping across the U-shaped hole of limiting plate, unclamp pressure cap, It is moved backward under the action of pushing top spring, glue bowl is pressed in the front end of terminal injecting assembly by one side pressure cap, guarantees note Perforation is only connected to medicine feeding hole, that is, conduit of glue bowl, and another aspect pressure cap and limiting plate are consolidated terminal injecting assembly position It is fixed, the syringe needle insertion of the other end of conduit is stored in the drug reservoir of medicament to be taken；By rotation external thread sleeve come adjust its Position on guide sleeve, the i.e. medicine taking amount of setting terminal injecting assembly, hand-held shank drive contracting rod rear end to move back, and telescopic rod is drawn It stretches, the mechanism locking until flexible rod rear end is locked is right by the contraction performance of itself at this time since telescopic rod is stretched Push rod implements continual and steady drawing, and the medical fluid in drug reservoir gradually enters the drug storage of terminal injecting assembly through syringe needle, conduit In cylinder, until catch mechanism can not continue to move backward, i.e., arrived in medicine-storing tube after catch mechanism and external thread sleeve front end are supported Preset medicine taking amount；Finally, releasing locking of the retaining mechanism to flexible rod rear end, telescopic rod automatic retracted and the shape that affranchises State holds pressure cap Forward, and it is to complete entirely medicine to be taken to operate that terminal injecting assembly, which is taken out,.

Furthermore, the limiting plate, pedestal, guide sleeve and pedestal are integrally formed using same material, make material Expect that metal material or light composite material can be selected.

Furthermore, the push rod, which quantitatively pulls part, has following technical characteristic:

A. during taking medicine, when terminal injecting assembly Chinese medicine dose is that zero i.e. push rod is located at front end, after telescopic rod Hold the mechanism locking that is not locked, then catch mechanism can be connect in the case where telescopic rod is in and is fully retracted state with shock portion clamping, and External thread sleeve is adjustable to its front end and supports with catch mechanism；

B. during taking medicine, when terminal injecting assembly Chinese medicine liquid is filled i.e. push rod is located at rearmost end when, after telescopic rod End be locked mechanism locking and catch mechanism connect with shock portion clamping, then telescopic rod should block still in tensional state, and at this time It holds mechanism to be limited by external thread sleeve and can not continue to move back, while external thread sleeve can not continue to adjust position backward.

Furthermore, the glue bowl bottom is equipped with one and extends outwardly and can be inserted into inserting for cooperation with pressure cap centre bore Pin, bolt tail end connect with conduit, bolt inner hollow and conduit is connected to the medicine feeding hole of glue bowl bottom, when bolt insertion pressure After the centre bore of cap, glue bowl is located in the ball impression of pressure cap and the center overlapping of axles of the two.

Furthermore, the retaining mechanism includes a locking pin, and locking pin is by being arranged in the pin of guide sleeve tail end Seat is limited and can be moved up and down, and the upper end of locking pin extends to above key seat and be fixed with handle, lower end be then equipped with drive its to The reset spring of upper reset；The rear end of telescopic rod is equipped with a pre-large post-small tapered cap, and is provided on front side of locking pin for holding It receives the locking slot of tapered cap, is equipped on the downside of the front end of locking slot convex for supporting the tongue of tapered cap front end；After telescopic rod When end moves back, tapered cap can drive locking pin that reset spring thrust is overcome to move down by tapered slope, when tapered cap is complete After falling into locking slot, reset spring drives locking pin to move up, and tongue supports with tapered cap rear end and tapered cap is made to be defined to lock In tight slot.

Furthermore, the pedestal upper surface be equipped with spill at be used for support terminal injecting assembly thread bush Placement seat, which is located at the front side of limiting plate, after the thread bush of terminal injecting assembly is placed on the placement seat, eventually Hold injecting assembly and pressure cap and telescopic rod three center overlapping of axles.

Furthermore, the outer wall of the guide sleeve is equipped with five groups of scales of 3-5, and every group of scale corresponds to a kind of model Terminal injecting assembly, scale numerical value corresponding to external thread sleeve tail end is to correspond to model after catch mechanism is supported with external thread sleeve front end Terminal injecting assembly in the dose that is sucked.

When taking medicine by this drug taking device the invention has the following beneficial effects: needleless injector terminal injecting assembly, originally take Medicine device can be stored the external force artificially applied by the stretcher strain of telescopic rod, then pass through the automatic retracted of telescopic rod Characteristic applies continual and steady traction force to push rod, therefore people is not necessarily in the lengthy procedure that medical fluid progresses into terminal injecting assembly For operation, the burden of user is reduced, it is easy to operate, it is time saving and energy saving, and ensure that traction force suffered by push rod is gently steady It is fixed, it avoids damaging terminal injecting assembly since stress is larger；This drug taking device can easily preset medicine taking amount, accuracy Height, strong applicability；In addition its is simple for structure, implements to be easy, low in cost, can be fabricated to folded form, as needed convenient for taking Band, the patient to need frequently to inject bring biggish convenience.

Detailed description of the invention

Fig. 1 is the terminal injecting assembly structural schematic diagram of needleless injector.

Fig. 2 is one of the overall structure diagram of needleless injector terminal injecting assembly drug taking device.

Fig. 3 is the two of the overall structure diagram of needleless injector terminal injecting assembly drug taking device.

Fig. 4 is the structural schematic diagram of hold-down mechanism and conduit tube component.

Fig. 5 is one of the structural schematic diagram that push rod quantitatively pulls part.

Fig. 6 is the second structural representation that push rod quantitatively pulls part.

Structural schematic diagram when Fig. 7 needleless injector terminal injecting assembly drug taking device works.

Fig. 8 is the structural schematic diagram after hold-down mechanism and conduit tube component further improvement.

Fig. 9 is the structural schematic diagram of telescopic rod.

Figure 10 is the another embodiment structural schematic diagram of telescopic rod.

Figure 11 is the structural schematic diagram of retaining mechanism.

Figure 12 is the another embodiment structural schematic diagram of retaining mechanism.

Figure 13 is retaining mechanism shown in Figure 12 by the structural schematic diagram of push rod timing.

Figure 14 is the structural schematic diagram of catch mechanism and push rod cooperation.

Figure 15 is structural schematic diagram when guide sleeve is equipped with multiple groups scale.

Figure 16 is pedestal using one of structural schematic diagram when foldable design in the deployed state.

Figure 17 is pedestal using second structural representation when foldable design in the deployed state.

Figure 18 is folding process schematic diagram when pedestal uses foldable design.

Figure 19 is structural schematic diagram when pedestal uses foldable design under folded state.

In figure, 1, shock portion, 2, push rod, 3, thread bush, 4, injection orifice, 5, medicine-storing tube, 6, piston, 7, syringe needle, 8, conduit, 9, pedestal, 10, pressure cap, 11, ball impression, 12, pedestal, 13, limiting plate, 14, catch mechanism, 15, telescopic rod, 16, guide groove, 17, Retaining mechanism, 18, shank, 19, guide sleeve, 20, scale, 21, external thread sleeve, 22, U-shaped hole, 23, glue bowl, 24, medicine feeding hole, 25, in Heart hole, 26, threaded portion, 27, guide groove, 28, guiding rib, 29, pushing top spring, 30, guide rod, 31, pilot hole, 32, spacing head, 33, groove, 34, bolt, 35, elastic component, 36, rear bar, 37, column chamber, 38, grafting chamber, 39, front bar, 40, handle, 41, key seat, 42, locking pin, 43, tapered cap, 44, locking slot, 45, tongue, 46, reset spring, 47, clamping seat, 48, securing groove, 49, U-shaped Frame, 50, limiting slot, 51, leading portion, 52, shaft, 53, back segment, 54, accommodating groove, 55, placement seat.

Specific embodiment

Referring to shown in Fig. 2,3, a kind of needleless injector terminal injecting assembly drug taking device disclosed in this invention, mainly by Conduit tube component, pedestal 12, terminal injecting assembly fixed part and push rod quantitatively pull part and constitute；

Wherein, as shown in figure 4, the conduit tube component is made of the glue bowl 23 connected through conduit 8 with syringe needle 7, glue bowl 23 Bottom is provided with medicine feeding hole 24, and medicine feeding hole 24 is communicated through conduit 8 with syringe needle 7, the size and shape and terminal injecting assembly of glue bowl 23 Front end it is corresponding, i.e., glue bowl 23 can tightly be buckled in the front end of terminal injecting assembly, make injection orifice 4 only with glue bowl 23 Medicine feeding hole 24 be connected to, syringe needle 7 is stored in the drug reservoir of medical fluid for protruding into；Thus one, conduit tube component can be terminal One is established between injecting assembly and drug reservoir for conveying the channel of medical fluid；

Wherein, as shown in Figure 1, 2, the pedestal 12 is in long strip, is used to provide support for other component；

Wherein, as shown in Fig. 2,3,4,7, the terminal injecting assembly fixed part is by 13 structure of hold-down mechanism and limiting plate At；Limiting plate 13 is fixed on 12 upside of pedestal, is used to support the breech face of the thread bush 3 of terminal injecting assembly, that is, limits eventually The back-end location of injecting assembly is held, being provided with U-shaped hole 22 on limiting plate 13 can continue so that the push rod 2 of terminal injecting assembly passes through It extends back；Hold-down mechanism is located at the front side of limiting plate 13, is made of pressure cap 10 and pedestal 9, and pedestal 9 is fixed on pedestal 12 Side and be that pressure cap 10 provides support, and be moved forward and backward pressure cap 10 can in a certain range；The rear end face of pressure cap 10, which has, to be used for The ball impression 11 for accommodating glue bowl 23 is provided on pressure cap 10 and wears for conduit 8 to the centre bore 25 in 10 front of pressure cap, sets on front side of pressure cap 10 There is the pushing top spring 29 for driving it to reset backward；Under the ejection of pushing top spring 29, the ball impression 11 of pressure cap 10 can be by glue bowl 23 And the front end of terminal injecting assembly is fixed, and the sealing of the front end of glue bowl 23 and terminal injecting assembly is driven to cooperate；It is described The size and shape of ball impression 11 should be corresponding with glue bowl 23, to ensure that pressure cap 10 is that the pressure that glue bowl 23 provides is balanced, protect Demonstrate,prove the sealing effect of glue bowl 23 and terminal injecting assembly front end；Since terminal injecting assembly fixed part uses above-mentioned knot Structure, the main part (thread bush 3 and medicine-storing tube 5) of terminal injecting assembly can be fixed for one side, without infusing to terminal The axial movement for penetrating the push rod 2 of component is construed as limiting, and on the other hand then drives glue bowl 23 and terminal injection group in conduit tube component The front end of part is tightly cooperated, it is ensured that injection orifice 4 is only connected to medicine feeding hole 24；

Wherein, as shown in Fig. 2,3,5,6,7, the push rod, which quantifies pulling portion and sets up separately, to be set in terminal injecting assembly fixed part The rear side divided a comprising guide sleeve 19, guide sleeve 19 are supported by pedestal 12, and one is defined in guide sleeve 19 can be along its front and back Mobile telescopic rod 15, telescopic rod 15 can be stretched and can automatic retracteds；Telescopic rod 15 and 10 center overlapping of axles of pressure cap, telescopic rod 15 front end and guide sleeve 19 can not relative rotation, and the front end of telescopic rod 15 extend to guide sleeve 19 front and with a clamping Mechanism 14 is fixedly connected, shock portion 1 of the catch mechanism 14 for 2 rear end of push rod of clamping terminal injecting assembly；Guide sleeve 19 Side wall is provided with the guide groove 16 that front and back extends, and the rear end of telescopic rod 15 is connected with a shank 18 that can be slided along guide groove 16, the shank 18 outer end extends to the outside of guide sleeve 19 through guide groove 16, for hand-held driving；Guide sleeve 19 is equipped with can be by telescopic rod 15 The retaining mechanism 17 of rear end progress position locking；When the shock portion 1 of 2 tail end of push rod of 14 clamping terminal injecting assembly of catch mechanism And the rear end of telescopic rod 15 be locked mechanism 17 lock when, telescopic rod 15 in tensional state and can to push rod 2 implement pull；Guiding The front end of set 19 is equipped with the threaded portion 26 big compared with its diameter, an external thread sleeve 21 be nested with it is outer in telescopic rod 15 and with 26 screw thread of threaded portion Cooperation, external thread sleeve 21 can not be after after being supported by rotation adjustable axial position, the front end of catch mechanism 14 and external thread sleeve 21 Continuous to move backward, i.e., external thread sleeve 21 plays for limiting the terminal location that catch mechanism 14 moves backward and adjusts terminal injection group The effect of the final drawing amount of push rod 2 of part；The outer wall of guide sleeve 19 is equipped with scale 20, scale corresponding to 21 tail end of external thread sleeve Numerical value supports the dose sucked in rear terminal injecting assembly by catch mechanism 14 and 21 front end of external thread sleeve；Since push rod is quantitatively led Pull portion uses above structure, can store the external force artificially applied by the stretcher strain of telescopic rod 15, so Implement gently stable drawing to push rod 2 by the automatic retracted characteristic of telescopic rod 15 afterwards, and can be by adjusting external thread sleeve 21 position realizes the purpose quantitatively pulled to push rod 2.

Referring to shown in Fig. 2,3,7, in above-mentioned needleless injector terminal injecting assembly drug taking device, pressure cap 10 is in a certain range Interior to be moved forward and backward, " a certain range " refers to, on the one hand, pressure cap 10 can move forward and ensure to have with limiting plate 13 enough Spacing, so as to when disposing terminal injecting assembly, can easily by terminal injecting assembly be placed on pressure cap 10 and limiting plate 13 it Between；On the other hand, pressure cap 10 can be moved rearwardly under 29 ejection of pushing top spring force glue bowl 23 and terminal injecting assembly before End part seal cooperation.

Referring to shown in Fig. 5,7, above-mentioned needleless injector terminal injecting assembly drug taking device is during taking medicine, terminal injection group The main part of part is defined and is always kept in a fixed state with the relative position of guide sleeve 19, the medicine taking amount in terminal injecting assembly with The displacement that push rod 2 generates backward is directly proportional, and the displacement that push rod 2 generates backward is determined by catch mechanism 14, catch mechanism 14 to The final position moved afterwards is determined by the axial position of external thread sleeve 21, it can be seen that, external thread sleeve 21 is locating on guide sleeve 19 Position and the linear proportionate relationship of medicine taking amount, and the scale 20 of 19 outer wall of guide sleeve can measure axial position locating for external thread sleeve 21 It sets, therefore 20 numerical value of scale corresponding to 21 tail end of external thread sleeve above-mentioned is that rear terminal is supported in catch mechanism 14 and 21 front end of external thread sleeve Dose this technical purpose sucked in injecting assembly is easily achieved.

Referring to shown in Fig. 6,7,9, in above-mentioned needleless injector terminal injecting assembly drug taking device, telescopic rod 15 can be stretched And the characteristic with automatic retracted, during taking medicine, telescopic rod 15 is pulled push rod 2 by contraction performance and moved back, and is based on this The structure of technical purpose, telescopic rod 15 has numerous embodiments, can be used with flowering structure, i.e., the telescopic rod 15 is by grafting Combination and the front bar 39 and rear bar 36 that are slidably matched respectively with guide sleeve 19 composition, are equipped between front bar 39 and rear bar 36 and drive two The elastic component 35 of person's automatic retracted；Simultaneously as the front end of telescopic rod 15 is fixedly connected with catch mechanism 14, and avoid clamping Mechanism 14 rotates, therefore requires the front end of telescopic rod 15 that cannot relatively rotate with guide sleeve 19, to realize this technology Purpose, can be respectively equipped with the guide groove 27 and guiding rib 28 being slidably matched on front bar 39 and guide sleeve 19, guiding rib 28 with lead Cooperate to slot 27 and make front bar 39 and guide sleeve 19 that can slide axially, but can not relatively rotate.

Referring to shown in Fig. 5,6,7, in above-mentioned needleless injector terminal injecting assembly drug taking device, telescopic rod 15 has double Function, on the one hand it can be stored the external force artificially applied by stretcher strain, and on the other hand it can pass through itself institute The automatic retracted characteristic having continues gently stable drawing to the implementation of push rod 2；In the production process, to elastic in telescopic rod 15 The elastic property of part 35 is measured, make telescopic rod 15 when being in tensional state possessed retraction force slightly larger than during taking medicine Driving force required for push rod 2 slowly moves back, therefore realize that telescopic rod 15 above-mentioned need to have double function not so difficult.

Referring to shown in Fig. 2,3,4,7, the operating method of above-mentioned needleless injector terminal injecting assembly drug taking device and work are former Reason are as follows: hand-held shank 18 adjusts the position of telescopic rod 15, makes catch mechanism 14 be moved to forefront, by the glue bowl 23 of conduit tube component It is placed in the ball impression 11 of 10 rear side of pressure cap, and the conduit 8 and syringe needle 7 for connecting glue bowl 23 pass through the centre bore of pressure cap 10 25 and extend to the front of pressure cap 10；Hand-held pressure cap 10 moves forward, and pressure cap 10 is made with limiting plate 13 to there is enough spacing to place The thread bush 3 of terminal injecting assembly is placed on 13 front side of limiting plate, and ensures push rod 2 by the main part of terminal injecting assembly Make shock portion 1 by 14 clampings of catch mechanism after the U-shaped hole 22 of limiting plate 13, pressure cap 10 is unclamped, in pushing top spring 29 Under the action of and move backward automatically, glue bowl 23 is pressed in the front end of terminal injecting assembly by one side pressure cap 10, guarantees injection Hole 4 is only connected to the medicine feeding hole 24 of glue bowl 23, and another aspect pressure cap 10 and limiting plate 13 are by terminal injecting assembly main part Position, which is fixed, is not construed as limiting push rod 2, the storage by the insertion storage of syringe needle 7 of 8 other end of conduit connection to taking liquid In medicine container；Adjust the corresponding relationship of its tail end Yu scale 20 by rotation external thread sleeve 21, i.e. setting terminal injecting assembly Medicine taking amount；Hand-held shank 18 drives 15 rear end of telescopic rod to move backward, and telescopic rod 15 is stretched, until telescopic rod 15 is moved to most Back-end location and the locking of mechanism 17 that is locked；At this point, telescopic rod 15 continues surely the implementation of push rod 2 by the contraction performance of itself Fixed drawing, the medical fluid in drug reservoir gradually enters in the medicine-storing tube 5 of terminal injecting assembly through syringe needle 7, conduit 8, until card It holds mechanism 14 and after 21 front end of external thread sleeve supports, catch mechanism 14 can not continue to move backward, i.e., arrived in medicine-storing tube 5 pre- If medicine taking amount；Finally, releasing locking of the retaining mechanism 17 to 15 rear end of telescopic rod, 15 automatic retracted of telescopic rod simultaneously affranchises State holds pressure cap 10 and moves forward, terminal injecting assembly is removed to complete entirely medicine taken to operate.

On the other hand, referring to shown in Fig. 2,3,7, it is contemplated that terminal injecting assembly is matched with needleless injector, can It can be equipped with plurality of specifications according to the difference of capacity, the outer dimension of the terminal injecting assembly of different size may be different, such as The diameter and length of the main part of different terminals injecting assembly may be different, and the length for also resulting in push rod 2 is also different, still They all have in common the feature that the central axis of 1. push rod 2, injection orifice 4 and terminal injecting assembly main part three is again It is overlapped；2. the shock portion 1 of 2 tail end of push rod needs to protrude into needleless injector and need to cooperate with hammer body, therefore the size in shock portion 1 And structure is typically identical.And in this needleless injector terminal injecting assembly drug taking device, the main body of terminal injecting assembly Part is that the limiting plate 13 of pressure cap 10 and rear side through front side is fixed, and pressure cap 10 can be moved forward and backward, therefore although different The size of the main part of the terminal injecting assembly of specification is different, but has no effect on terminal injecting assembly fixed part and carry out to it Fixed, the sealing that will not influence glue bowl 23 and terminal injecting assembly front end cooperates；Since telescopic rod 15 can be along guide sleeve 19 Be moved forward and backward, i.e., for limit 2 rear-end collision portion 1 of push rod catch mechanism 14 can front and back adjust position, therefore even if different size Terminal injecting assembly 2 length of push rod it is different, but have no effect on 2 tail end of push rod and connect with the clamping of catch mechanism 14.Thus Apparently, this needleless injector terminal injecting assembly drug taking device is applicable to the terminal injecting assembly of plurality of specifications.

Referring to shown in Fig. 7, when terminal injecting assembly takes medicine by this drug taking device, external force that this drug taking device will can artificially apply It is stored by the stretcher strain of telescopic rod 15, then the application of push rod 2 is held by the automatic retracted characteristic of telescopic rod 15 Continuous, stable drawing, therefore manual operation is not necessarily in the lengthy procedure that medical fluid progresses into terminal injecting assembly, reduce use The burden of person, it is easy to operate, it is time saving and energy saving；And since the drawing that telescopic rod 15 implements push rod is very gentle, stable, keep away Exempt from since stress is larger and the damage caused by terminal injecting assembly；This drug taking device can easily preset medicine taking amount, and accuracy is high, It is applicable to the terminal injecting assembly of plurality of specifications.

Furthermore, referring to shown in Fig. 2,3,7, in this needleless injector terminal injecting assembly drug taking device, medicine mistake is taken Cheng Zhong, limiting plate 13, pedestal 9 and 19 three position of guide sleeve are relatively fixed, and are supported by pedestal 12, therefore the limiting plate 13, pedestal 9, guide sleeve 19 and pedestal 12 are integrally formed using same material, are thus advantageously ensured that integral strength and are reduced system This is caused, making material can be selected metal material, portability is improved to reduce density, light composite material system also can be used Make.

Furthermore, referring to shown in Fig. 2,3,7, in order to guarantee that this needleless injector terminal injecting assembly drug taking device can expire The operation requirement of the sufficient any medicine taking amount of terminal injecting assembly, the push rod, which quantitatively pulls part, has following technical characteristic:

A. during taking medicine, when terminal injecting assembly Chinese medicine dose is that zero i.e. push rod 2 is located at front end, such as telescopic rod 15 Rear end is not locked the locking of mechanism 17, then catch mechanism 14 can be in telescopic rod 15 and be fully retracted under state and 2 rear end of push rod The connection of 1 clamping of shock portion, and external thread sleeve 21 can be moved forward to its front end and supported with catch mechanism 14 by rotation；

B. during taking medicine, when terminal injecting assembly Chinese medicine liquid is filled i.e. push rod 2 is located at rearmost end when, such as telescopic rod 15 Rear end be locked mechanism 17 locking and catch mechanism 14 connect with 1 clamping of shock portion of 2 rear end of push rod, then telescopic rod 15 should still be located In tensional state, and at this time, catch mechanism 14 is limited by external thread sleeve 21 and can not continue to move back, while external thread sleeve 21 is in its row The rearmost end of journey and it can not continue to adjust position backward；

Thus one, this needleless injector terminal injecting assembly drug taking device can meet terminal injecting assembly zero to maximum rated Any medicine taking amount setting in capacity；And when ensure that placement terminal injecting assembly, the shock portion 1 of 2 rear end of push rod can be convenient It is connect with catch mechanism 14；Simultaneously, it is therefore prevented that push rod 2 excessively pulled backward avoid dose in medicine-storing tube 5 beyond it is specified most Big dose.

Furthermore, as shown in Figure 2,3, in this needleless injector terminal injecting assembly drug taking device, pedestal 9 is fixed on On pedestal 12 it is that pressure cap 10 provides support, and make pressure cap 10 in a certain range to be moved forward and backward, is equipped with and drives on front side of pressure cap 10 The pushing top spring 29 for resetting it backward；This technical effect is easily achieved using the prior art, it such as can be in pedestal 9 and pressure cap The slideway and sliding block slidably cooperated is respectively set on 10, so that pressure cap 10 can be moved forward and backward in a stroke, ejection Spring 29 may be provided at 10 rear side of pressure cap, and one end is fixedly connected with pressure cap 10, and the other end can then be provided by pedestal 9 or pedestal 12 Support, thus one, pushing top spring 29 can drive pressure cap 10 to reset backward automatically；But it is unfavorable for guaranteeing pedestal using the above structure 9 compactedness cooperated with pressure cap 10 are also unfavorable for reducing the active force other than axial direction suffered by pressure cap 10, reduce pressure cap 10 Force stability.For this purpose, in the present invention, pressure cap 10 can be used under type such as with pedestal 9 and be cooperated:

I.e. as shown in figure 8,10 two sides of pressure cap are respectively provided with a guide rod 30 extended forward, two guide rods 30 and pressure The central axis of 10 three of cap is generally aligned in the same plane；And pedestal 9 is located at the front side of pressure cap 10, before opening there are two two guide rods 30 are supplied The pilot hole 31 slided afterwards；The front end of two guide rods 30 is equipped with the spacing head for preventing guide rod 30 from slipping from pilot hole 31 32；There are two the pushing top spring 29 is set, it is nested with outside two guide rods 30 and between pedestal 9 and pressure cap 10, uses respectively In driving pressure cap 10 to reset backward；The middle part of pedestal 9 is provided with the groove 33 being in U-shape that front and back extends, to be drawn by pressure cap 10 Conduit 8 continue to extend back；Thus one, pedestal 9 and the cooperation of pressure cap 10 are more compact, advantageously reduce terminal injection group The overall volume of part fixed part, while ensure that active force suffered by pressure cap 10 is concentrated mainly in axial direction, make 10 work of pressure cap Work is more stable, and the resist force applied to terminal injecting assembly is more balanced.

Furthermore, referring to shown in Fig. 4,7, this needleless injector terminal injecting assembly drug taking device is in use, by terminal The main body of injecting assembly is placed in the operating process of terminal injecting assembly fixed part, on the one hand need to guarantee as far as possible glue bowl 23 with The front end center overlapping of axles of terminal injecting assembly are improved the sealing fiting effect of the two with this, on the other hand need to protected as far as possible The center overlapping of axles of pressure cap 10 and glue bowl 23 are demonstrate,proved, it is more balanced with the pressure that this applies pressure cap 10 to glue bowl 23, it is also beneficial to The fixed effect to terminal injecting assembly main part is improved, but since pressure cap 10, glue bowl 23 and terminal injecting assembly are three Independent part, the optimal above-mentioned positional relationship of realization is intended in terminal injecting assembly main body instrumentation to be not easy, and had Certain operation difficulty, in order to reduce this operation difficulty, the present invention also has following improvement:

I.e. as shown in figure 8,23 bottom of glue bowl extends outwardly equipped with one and can be inserted into and match with 10 centre bore 25 of pressure cap The bolt 34 of conjunction, 34 tail end of bolt are connect with conduit 8,34 inner hollow of bolt and by the medicine feeding hole of conduit 8 and 23 bottom of glue bowl 24 connection, when bolt 34 be inserted into pressure cap 10 centre bore 25 after, glue bowl 23 is located in the ball impression 11 of pressure cap 10, and glue bowl 23 and The center overlapping of axles of both pressure caps 10；Thus one, on the one hand the effect of positioning is born in the cooperation of bolt 34 and centre bore 25, Guarantee both pressure cap 10 and glue bowl 23 coaxial combination, on the other hand bears the effect of connector again, it can be in placement terminal injection group Before part, glue bowl 23 and pressure cap 10 are accurately combined, to reduce the operation that terminal injecting assembly correctly disposes Difficulty, and improve fixed effect.

Furthermore, referring to shown in Fig. 5,6,7, in this needleless injector terminal injecting assembly drug taking device, telescopic rod 15 should have biggish telescopic extensions and stable contracting property, since meet the operation of any medicine taking amount of terminal injecting assembly and want It asks, and guarantees the stability pulled to push rod 2；The telescopic extensions of telescopic rod 15 can be matched by increasing front bar 39 with 36 grafting of rear bar The length at position is closed to improve, and resilience performance is then determined by the elastic component 35 in telescopic rod 15, therefore elastic component 35 should be with tool There is good elasticity as premise, in addition to this, elastic component 35 should also have enough length to improve its producible elasticity Deformation range, to meet the flexible stroke needs of telescopic rod 15, in the present invention, in order to guarantee that elastic component 35 has enough length Following design can be used in degree, and the entire length without increasing telescopic rod 15 thus, telescopic rod 15:

I.e. as shown in Figures 9 and 10, the front bar 39 that the telescopic rod 15 is combined by grafting is composed with rear bar 36, front bar 39 rear end is provided with forward the grafting chamber 38 for the insertion of 36 front end of rear bar of a blind hole shape, and grafting chamber 38 is inserted into 36 front end of rear bar Interior and can slide axially, the front end of rear bar 36 is provided with the column chamber 37 of a blind hole shape backward, and grafting is fixed in one end of elastic component 35 The bottom of chamber 38, the other end are then fixed on the bottom of 36 column chamber 37 of rear bar, with this under the premise of 15 length of telescopic rod is certain most Spring or rubber rope can be used in the length for improving elastic component 35 of limits, elastic component 35, to improve the elasticity of elastic component 35 Performance, the final flexible stroke needs for guaranteeing the producible elastic deformation range of elastic component 35 and can satisfy telescopic rod 15.

Furthermore, referring to shown in Fig. 6,7, in this needleless injector terminal injecting assembly drug taking device, retaining mechanism 17 are mainly used for for the tail end of telescopic rod 15 being locked in the last end position of stroke, be based on this technical purpose, retaining mechanism 17 Need to have the ability for the retraction force that can 15 tail end of telescopic rod be fixed and be overcome telescopic rod 15, therefore retaining mechanism 17 can Using such as flowering structure:

As shown in figure 11, the retaining mechanism 17 includes a locking pin 42, and locking pin 42 is by being arranged in guide sleeve 19 The key seat 41 of tail end is limited and can be moved up and down, and the upper end of locking pin 42 extends to 41 top of key seat and is fixed with handle 40, under End is then equipped with the reset spring 46 for driving it to reset upwards；The rear end of telescopic rod 15 is equipped with a pre-large post-small tapered cap 43, and The front side of locking pin 42 is provided with the locking slot 44 for accommodating tapered cap 43, is equipped with convex be used on the downside of the front end of locking slot 44 Support the tongue 45 of 43 front end of tapered cap；When 15 rear end of telescopic rod moves back, tapered cap 43 can drive locking by tapered slope Pin 42 overcomes 46 thrust of reset spring and moves down, and after tapered cap 43 falls completely within locking slot 44, reset spring 46 drives locking Pin 42 moves up, and tongue 45 and 43 rear end of tapered cap support and be defined to tapered cap 43 in locking slot 44；Thus one, it stretches 15 rear end of bar can be locked automatically when being moved rearwardly into rearmost end mechanism 17 locking, after the completion of taking medicine, press handle 40 downwards, Locking pin 42 overcomes 46 thrust of reset spring and moves down, and tongue 45 and 43 rear end of tapered cap are detached from, that is, relieves retaining mechanism 17 Locking to 15 rear end of telescopic rod.

Furthermore, referring to shown in Figure 11, retaining mechanism 17 is using structure above-mentioned, it can be achieved that locking in the present invention The technical requirements of mechanism 17, while operation is also more convenient, but the structure of aforementioned locking mechanism 17 is slightly complicated, it is not compact enough, And manufacture difficulty is larger, is unfavorable for reducing cost.For this purpose, in the present invention, retaining mechanism 17 also has another more simple Single feasible, embodiment being easy to make, specific structure are as follows:

I.e. as shown in Figure 12,13, the retaining mechanism 17 includes a limiting slot 50, and the limiting slot 50 is by 16 tail of guide groove It holds recessed to side and is formed；The rear end of telescopic rod 15 can be relatively rotated with front end, when the shank 18 that 15 rear end of telescopic rod is fixed After being moved to 16 tail end of guide groove, can be entered in limiting slot 50 by rotation enables 18 axial position of shank to limit, i.e., will The rear end of telescopic rod 15 is locked in the last end position of its stroke；Thus one, 15 rear end of telescopic rod is moved rearwardly into rearmost end Behind position, shank 18 is screwed in limiting slot 50,15 rear end of telescopic rod can be made locked and can not be moved axially, when taking medicine complete Cheng Hou, by shank 18 from rotation to guide groove 16, the rear end of telescopic rod 15 can be moved forward at this time, that is, relieve in limiting slot 50 Locking of the retaining mechanism 17 to telescopic rod 15；The embodiment is more easy, operate it is also more convenient, especially structure simply at This is cheap.

Furthermore, in this needleless injector terminal injecting assembly drug taking device, catch mechanism 14 is mainly used for clamping Shock portion 1 and drawing backward is implemented to push rod 2, therefore the structure of existing clamping device can be used in catch mechanism 14, but operates not Enough convenient, placement and taking-up terminal injecting assembly are more troublesome, it is contemplated that diameter of the shock portion 1 usually compared with push rod 2 is big, therefore clamping Mechanism 14 can be used such as flowering structure:

I.e. as shown in Figure 13,14, the catch mechanism 14 includes one and is fixedly connected with 15 front end of telescopic rod and forward The U-shaped frame 49 of extension, U-shaped frame 49 are fixedly arranged at the front end with clamping seat 47, and the upper end of clamping seat 47 is provided with a securing groove 48 downwards, Push rod 2 may pass through securing groove 48 and the rear side that makes the shock portion 1 of tail end be defined in clamping seat 47, and thus one, placement terminal note It only needs to be put into shock portion 1 from top to bottom in U-shaped frame 49 when penetrating component, when medicine being taken to complete to take out terminal injecting assembly, only Shock portion 1 need to be taken out out of U-shaped frame 49 from bottom to top, it is easy to operate, and clamping excellent effect.

Furthermore, referring to shown in Fig. 7, by the working principle of this needleless injector terminal injecting assembly drug taking device Lai It sees, it is necessary to which guarantee pressure cap 10,15 three center overlapping of axles of terminal injecting assembly and telescopic rod as far as possible can guarantee drug taking device work The stability of work improves the accuracy controlled medicine taking amount, this allows for terminal injecting assembly in terminal injecting assembly fixed part Required by installation position in point has, when for installing terminal injecting assembly, it fast can accurately be placed in correct position, this nothing Needle injection terminal injecting assembly drug taking device also has following improvement:

I.e. as shown in Fig. 3,4,7,12 upper surface of pedestal be equipped with spill at be used for support terminal injection group The placement seat 55 of part thread bush 3, the placement seat 55 are located at the front side of limiting plate 13, when the thread bush 3 of terminal injecting assembly is placed After on the placement seat 55, terminal injecting assembly and 15 three center overlapping of axles of pressure cap 10 and telescopic rod；Thus one, terminal note The placement operation for penetrating component is more convenient, and position is more accurate.

Furthermore, this needleless injector terminal injecting assembly drug taking device is applicable to the terminal injection group of plurality of specifications Part, but the internal diameter due to the medicine-storing tube 5 of the terminal injecting assembly of different size may be different from length, carried out in front Associated description, when this results in push rod 2 to be moved rearwardly into same position, the terminal injecting assembly reality achieved of different model Medicine taking amount is different, and is also not in fixed proportion relationship between these terminal injecting assemblies practical medicine taking amount achieved, so that Scale 20 on guide sleeve 19 does not have versatility, and the medicine taking amount for being not applied for the terminal injecting assembly of a variety of different models is set It sets.The present invention in order to solve this technical problem, also has following improvement, specific structure are as follows:

As shown in figure 15, the outer wall of the guide sleeve 19 is equipped with five groups of scales 20 of 3-5, every group of scale 20 corresponding one The terminal injecting assembly of model is planted, scale numerical value corresponding to 21 tail end of external thread sleeve is that catch mechanism 14 is supported with 21 front end of external thread sleeve The dose sucked in the terminal injecting assembly of model is corresponded to behind top.

Furthermore, needleless injector for insulin injection be it is the most universal, since diabetic needs day Often injection, therefore the portability of needleless injector and its corollary apparatus don't fail to consider, Needleless injection disclosed in this invention Device terminal injecting assembly drug taking device structure is more compact, and volume is more small and exquisite, has portable characteristic, but if having folding Folded function then can further promote portability, and it is more convenient to bring for user, for this purpose, the present invention is also to originally taking medicine Device has following improve:

I.e. as shown in Figure 16,17,18,19, the pedestal 12 is connected by leading portion 51 and 53 two parts of back segment through shaft 52 It forming, terminal injecting assembly fixed part is fixed on 51 upside of leading portion, and push rod quantitatively pulls part and is fixed on 53 upside of back segment, after 53 downside of section is provided with the accommodating groove 54 that can accommodate 51 lower part of leading portion, and leading portion 51 and back segment 53 can carry out 0-180 degree rotation；It uses When, by leading portion 51 and the rotation of back segment 53 to linear can carry out that medicine is taken to operate, when carrying, by leading portion 51 and back segment 53 into Row folds, and keeps drug taking device integrally more compact, is more conducive to storing and carry.

Claims

1. a kind of needleless injector terminal injecting assembly drug taking device, characterized in that it comprises:

Conduit tube component is made of glue bowl and the syringe needle connected through conduit, and glue bowl bottom is provided with medicine feeding hole, medicine feeding hole through conduit with Syringe needle communicates, and glue bowl is used to seal cooperation with terminal injecting assembly front end and be connected to injection orifice only with glue bowl medicine feeding hole；

Pedestal, it is in long strip, for providing support for other component；

Terminal injecting assembly fixed part, is made of hold-down mechanism and limiting plate；Limiting plate is fixed on the upside of pedestal, for supporting Hold the breech face of the thread bush of terminal injecting assembly, U-shaped hole is provided on limiting plate so that the push rod of terminal injecting assembly passes through and It can continue to extend back；Hold-down mechanism is located at the front side of limiting plate, is made of pressure cap and pedestal；Pedestal is fixed on the upside of pedestal And support is provided for pressure cap, and be moved forward and backward pressure cap can in a certain range；The rear end face of pressure cap has for accommodating glue bowl Ball impression, the centre bore passed through for conduit is provided on pressure cap, is equipped with the pushing top spring for driving it to reset backward on front side of pressure cap；? Under the ejection of pushing top spring, the front end of glue bowl and terminal injecting assembly can be fixed for pressure cap, and glue bowl and terminal is driven to be infused Penetrate the front end sealing cooperation of component；

Push rod quantitatively pulls part, and the rear side of terminal injecting assembly fixed part is arranged in comprising one by pedestal support Guide sleeve, define in guide sleeve one can be moved forward and backward along guide sleeve and can automatic retracted telescopic rod；The front end of telescopic rod with Guide sleeve can not relative rotation, and its telescopic rod front end extends in front of guide sleeve and with one for clamping terminal injecting assembly The catch mechanism in shock portion is fixedly connected, telescopic rod and pressure cap center overlapping of axles；The side wall of guide sleeve is provided with leading for front and back extension Slot, the rear end of telescopic rod are connected with the shank that can be slided along guide groove, and the outer end of the shank extends to outside guide sleeve through guide groove；It leads A retaining mechanism that flexible rod rear end can be locked is equipped with to putting on；When the shock portion of catch mechanism clamping terminal injecting assembly, Flexible rod rear end be locked mechanism locking when, telescopic rod in tensional state and can to the push rod of terminal injecting assembly implement pull； The front end of guide sleeve is equipped with the threaded portion big compared with its diameter, and an external thread sleeve is nested with outside telescopic rod and cooperates with threaded portion, By rotation adjustable axial position, external thread sleeve is used to limit the terminal location that catch mechanism moves backward and plays tune external thread sleeve The effect of the push rod drawing amount of terminal injecting assembly is saved, the outer wall of guide sleeve is equipped with scale, quarter corresponding to external thread sleeve tail end Degree value supports the dose sucked in rear terminal injecting assembly by catch mechanism and external thread sleeve front end；

The glue bowl bottom is equipped with a bolt that extends outwardly and can be inserted into pressure cap centre bore cooperation, bolt tail end and conduit Connection, bolt inner hollow and conduit is connected to the medicine feeding hole of glue bowl bottom, when bolt be inserted into pressure cap centre bore after, glue bowl In the ball impression of pressure cap and the center overlapping of axles of the two；The pedestal upper surface be equipped with spill at be used for support The placement seat of terminal injecting assembly thread bush, the placement seat are located at the front side of limiting plate, when the thread bush of terminal injecting assembly is put After setting on the placement seat, terminal injecting assembly and pressure cap and telescopic rod three center overlapping of axles.

2. a kind of needleless injector terminal injecting assembly drug taking device according to claim 1, it is characterised in that: described pushes away Bar, which quantitatively pulls part, has following technical characteristic:

A. during taking medicine, when terminal injecting assembly Chinese medicine dose is that zero i.e. push rod is located at front end, such as flexible rod rear end is not The mechanism that is locked locking, then catch mechanism can be connect in the case where telescopic rod is in and is fully retracted state with shock portion clamping, and outer spiral shell Set is adjustable to its front end and supports with catch mechanism；

B. during taking medicine, when terminal injecting assembly Chinese medicine liquid is filled i.e. push rod is located at rearmost end when, such as flexible rod rear end quilt Retaining mechanism locking and catch mechanism is connect with shock portion clamping, then telescopic rod should be still in tensional state, and clamping machine at this time Structure is limited by external thread sleeve and can not continue to move back, while external thread sleeve can not continue to adjust position backward.

3. a kind of needleless injector terminal injecting assembly drug taking device according to claim 1, it is characterised in that: the lock Tight mechanism includes a locking pin, and locking pin is limited by the key seat that guide sleeve tail end is arranged in and can be moved up and down, locking pin Upper end extends to above key seat and is fixed with handle, and lower end is then equipped with the reset spring for driving it to reset upwards；After telescopic rod End is equipped with a pre-large post-small tapered cap, and the locking slot for accommodating tapered cap is provided on front side of locking pin, before locking slot End downside is equipped with the convex tongue for being used to support tapered cap front end；When flexible rod rear end moves back, tapered cap can pass through taper Inclined-plane drives locking pin to overcome reset spring thrust and move down, and after tapered cap falls completely within locking slot, reset spring drives lock Tight pin moves up, and tongue and tapered cap rear end support and be defined to tapered cap in locking slot.

4. a kind of needleless injector terminal injecting assembly drug taking device according to claim 1, it is characterised in that: described leads Five groups of scales of 3-5 are equipped with to the outer wall of set, every group of scale corresponds to a kind of terminal injecting assembly of model, external thread sleeve tail end institute Corresponding scale numerical value corresponds to the interior medicine sucked of terminal injecting assembly of model after being supported by catch mechanism with external thread sleeve front end Amount.