CN203090106U

CN203090106U - Time counting type injector

Info

Publication number: CN203090106U
Application number: CN 201320092914
Authority: CN
Inventors: 钱国镇
Original assignee: CC Biotechnology Corp
Current assignee: CC Biotechnology Corp
Priority date: 2012-11-02
Filing date: 2013-02-28
Publication date: 2013-07-31
Anticipated expiration: 2023-02-28
Also published as: TWM447781U

Abstract

A counting type injector comprises an injection sleeve group, an injection push rod and a counting wheel ring, wherein a medicament bottle and an injection needle are arranged in the injection sleeve group in a detachable mode, the injection push rod and a dose display component are arranged in the injection sleeve group, a plurality of interference threads are formed in a ring body of the counting wheel ring, one or two radially corresponding driving thread sections are formed on the injection push rod penetrating through the outer peripheral surface of a driving part of the ring body, the driving thread sections can be selectively meshed with the interference threads in the counting wheel ring, so that when the injector is used for injection each time, namely the injection push rod is linearly moved in the injection sleeve group, the counting wheel ring is driven to rotate for one grid number of times by the driving thread sections, and when the repeated use number of the injector reaches the set number of times, the counting wheel ring is clamped in the injection sleeve group, and the injector cannot be reused due to function failure.

Description

Metering formula syringe

Technical field

This utility model is about a kind of syringe, refers to a kind of metering formula syringe that can control the repeated use number of times especially.

Background technology

At present as the injection of insulin, little pin beauty treatment etc.., all be to utilize small-sized syringe from the medicament that extracts predetermined close in the ampoule of injection medicament is housed, thrust in the human body via the syringe needle of syringe front end again and medicament is injected in the human body.

Existing general syringe in use, form member because of it and all contact medicament, safety in utilization based on injection, syringe is after use, promptly need whole members of whole syringe are all abandoned, so it is high that sufferer spends in the expense of syringe, cause treatment the next item up white elephant, and the garbage amount of the syringe after using is on the high side.

For after solving existing syringe and using, must whole the problem that injection abandons fully, but the syringe that the previous proposition once of this utility model applicant partial component repeats to re-use.This syringe mainly is to utilize the structure of its syringe body for repeating to re-use, medicine container and syringe needle that fixed dosage injection medicament only is housed in the order are the member of jettisonable, to meet the safety in utilization of injection medicament, and reach the saving material, reduce the function of unnecessary waste of material.

Thought is based on the safety in utilization of syringe, the member that can repeat to utilize again in the aforementioned syringe also should be considered its reasonable reusable number of times, with the safety of safeguarding that syringe uses, yet in the composition of this syringe structure, the mechanism of restriction access times is not provided, the necessity that is further improved is arranged in fact.

The utility model content

Main purpose of the present utility model is to provide a kind of metering formula syringe, and is uncommon with this utility model, improves the shortcoming that existing reusable syringe type can't volitional check repeats to re-use number of times.

For reaching aforementioned purpose, the metering formula syringe that this utility model proposed comprises:

One shot sleeve group, it comprises first sleeve of a hollow and second sleeve of a hollow, described first sleeve is in order to provide an ampoule, first sleeve, one end has a syringe needle and connects the end, syringe needle connects the end and establishes on it in order to an injection needle group to be provided, the first telescopic other end has an engagement end portion, second sleeve comprises the extension portion that a socket pipe portion and is engaged on socket pipe portion one end, and with the socket pipe portion removable group of ground winding first telescopic engagement end portion, described second sleeve inner forms a partition board portion between socket pipe portion and extension portion, and one by this partition board portion and have the central siphon portion of mesopore, second sleeve connects the ring portion of partition board portion towards the peripheral formation one of first a telescopic end in central siphon portion, described ring portion inwall forms at least one end projection, central siphon portion has two towards first a telescopic end section outer peripheral face and is radially relative positive stop, has a spacing between positive stop and the partition board portion;

One injection putter, be installed in movably in this shot sleeve group, and can connect the interior piston of described ampoule, described injection putter comprises a body of rod and an operating parts, the axial end of the described body of rod is a drive division, the axial other end of the body of rod is the bar connecting portion, the bar connecting portion of the body of rod stretches out outside second sleeve, operating parts is positioned at the outer lateral connector bar connecting portion of second sleeve, the described body of rod forms a plurality of driving thread segments at the drive division outer peripheral face, these a plurality of driving thread segments are along the body of rod arrangement that axially continues, and described driving thread segment comprises a plurality of adjacent screw thread bars arranged side by side, and a plurality of screw thread bars in the adjacent driven thread segment are forward that spiral is connected; And

One counting torus, comprise a ring body, a plurality of sheet and fasteners of colluding, described ring body is installed in second sleeve, and be socketed in the drive division outside of the body of rod of injection putter, described ring body inner peripheral surface forms a plurality of forward interference screw threads of spiral that are, the driving thread segment of the alternative engagement of described interference screw thread body of rod drive division, describedly a plurality ofly collude sheet and this fastener circular row forms in the side of ring body towards partition board portion, described a plurality of equidistant arrangement spaced apart of sheet of colluding, the described sheet that colludes colludes and is against on the positive stop, make the counting torus only can fix a point to rotate, the second telescopic end projection is resisted against two adjacent gaps of colluding between the sheet end, the fastener end has the recessed edge of blocking, the rectilinear motion of injection putter in the shot sleeve group can make its body of rod drive thread segment and drive counting torus and rotate lattice, and rotates to the end projection at the counting torus and be equipped in the blocking recessed edge place of fastener and fixed by blocking.

By aforementioned metering formula syringe utility model, make its shot sleeve group, injection putter can be kept with parts such as counting torus and can repeat outside nonexpondable function, this metering formula syringe further makes the inner interference screw thread that forms a plurality of forward spirals of the counting torus that is installed in shot sleeve group inside, the body of rod at injection putter forms along one or two radially corresponding driving thread segments with its drive division outer peripheral face that passes the counting torus, drive the intra-annular interference screw thread of forward screw bar alternative engagement counter wheel of thread segment, with this when using syringe to inject each time, promptly utilize the rectilinear motion of injection putter in the shot sleeve group to rotate a lattice metering via driving thread segment drive counting torus, when syringe is reused the number of times of number of times arrival setting, the counting torus is stuck in the shot sleeve group, and being lost efficacy, this syringe function can't re-use, guarantee that this metering formula syringe avoids excessively being reused, with the safety of safeguarding that syringe uses.

Description of drawings

Fig. 1 is a preferred embodiment of this utility model metering formula syringe and the perspective exploded view of ampoule and injection needle.

Fig. 2 is the combination schematic appearance of metering formula syringe preferred embodiment shown in Figure 1 in conjunction with ampoule and injection needle.

Fig. 3 is in the metering formula syringe preferred embodiment shown in Figure 1, and the body of rod of injection putter and dosage show the perspective exploded view of torus.

Fig. 4 is in the metering formula syringe preferred embodiment shown in Figure 1, and the solid of second sleeve and sliding sleeve is decomposed generalized section.

Fig. 5 is the combination generalized section of metering formula syringe preferred embodiment shown in Figure 1 in conjunction with ampoule and injection needle.

Fig. 6 is the generalized section of Fig. 5 section line 6-6 position.

Fig. 7 is the generalized section of Fig. 5 section line 7-7 position.

Fig. 8 is the combination generalized section of metering formula syringe preferred embodiment shown in Figure 1 in conjunction with another angle of ampoule and injection needle.

Fig. 9 is the generalized section of Fig. 8 section line 9-9 position.

The drawing reference numeral explanation

1 ampoule 1A piston

2 injection needles

3 shot sleeve groups

31 first sleeves, 311 syringe needles connect the end

312 engagement end portion, 313 grabs

314 para-position protuberances

322 extension portions, 323 partition board portion

3241 shell fragment portions of 324 central siphon portions

3242 positive stops, 3243 raised lines

3244 guiding projections, 3245 butt projections

325 tab portion

326 blocking flanges 327 push shrapnel

329 ring portions

3291 end projections

4 injection putters, 40 bodies of rod

401 drive divisions, 402 bar connecting portions

403 body of rod end blocks 404 drive thread segment

405 ring flanges, 406 flanges

41 operating parts, 411 knobs

412 fit pipe portions, 413 fixation hooks

42 sliding sleeves, 421 bodies

422 Fixed Divisions, 4221 blocked holes

423 guide grooves, 424 ring baffles

425 adapter portions, 4251 joint-cuttings

426 chute portion

5 counting torus, 50 ring bodies

51 interfere screw thread 52 to collude sheet

The recessed edge of 53 fasteners, 531 blockings

6 protecting covers

The specific embodiment

Following conjunction with figs. and preferred embodiment of the present utility model, further setting forth this utility model is to reach the technological means that predetermined utility model purpose is taked.

As shown in Figure 1, this utility model metering formula syringe is in order to provide a deserted ampoule 1 and a deserted injection needle to establish on it for 2 groups, as the drug injection purposes.Described deserted ampoule 1 comprises the bottle that the injection medicament is housed in, and bottle one end is organized hermetically and established a closed end cap, and the bottle other end is provided with the bottle inwall is airtight and contacts and the axially movable piston 1A of energy; Described deserted injection needle 2 mainly is to set firmly the entry needle that pin hole is arranged in a socket part, the section that entry needle stretches out outside the socket part is an injection portion, section in the socket part is the puncture section, and stretches in the ampoule 1 in order to the closure body of the ampoule 1 that punctured with the puncture section.

As shown in Figure 1, the composition of this utility model metering formula syringe mainly comprises: a shot sleeve group 3, an injection putter 4 and a counting torus 5, or further comprise a protecting cover 6, wherein:

As shown in Figures 1 and 2, described shot sleeve group 3 comprises one first sleeve 31 and one second sleeve 32, described first sleeve 31 is ducted bodies that an inside is axial perforation, in order to provide ampoule 1 to install wherein, described first sleeve, 31 1 ends have syringe needle connection end 311, the other end has an engagement end portion 312, it is to stretch into wherein in order to an end that provides ampoule 1 to have closure body that described syringe needle connects end 311, and the socket part that injection needle 2 is provided is sheathed on it, and injection needle 2 can insert in the ampoule 1.In this preferred embodiment, engagement end portion 312 sides of described first sleeve 31 are formed with a plurality of grabs that are distributed in distance 313, removable group combine by the clamping compound mode by 32 in grab 313 and second sleeve.

As shown in Figures 1 and 2, described second sleeve 32 is ducted bodies that an inside is axial perforation, described second sleeve 32 comprises the extension portion 322 that a socket pipe portion 321 and is engaged on socket pipe portion 321 1 ends, the engagement end portion that is connected to first sleeve 31 312 that described socket pipe portion is 321 removable groups, the shot sleeve group 3 by

first sleeve

31 and 32 combinations of second sleeve is fixing wherein with ampoule 1.

As Fig. 1, Fig. 4, Fig. 5 and shown in Figure 9, described second sleeve 32 inside form a partition board portion 323 and have a central siphon portion 324 by this partition board portion 323 between socket pipe portion 321 and extension portion 322, by partition board portion 323 second sleeve, 32 inner spaces are separated into the activity space that an assembly space and that is positioned at socket pipe portion 321 is positioned at extension portion 322, and with partition board portion 323 provide ampoule 1 against the position, described socket pipe portion 321 outer peripheral faces form the tab portion 325 that outwards protrudes out, the assembly space of described second sleeve 32 forms an installation opening at place, socket pipe portion 321 outer ends, this socket pipe portion 321 contiguous installation opening place in activity space forms a blocking flange 326, socket pipe portion 321 periphery walls form and a plurality ofly

push shrapnel

327, and 327 peripheries that push shrapnel form the line of rabbet joint, an end that makes the 327 contiguous blocking flanges 326 that push shrapnel is that free end has radially activity and regressive elasticity, make the socket pipe portion 321 of engagement end portion 312 insertions second sleeve 32 of first sleeve 31, grab 313 hook joints are at blocking flange 326 places, and can utilize the 327 pushing and pressing grabs 313 that push shrapnel to break away from blocking flange 326, the engagement end portion 312 of first sleeve 31 can be disassembled with the socket pipe portion 321 of second sleeve 32.

In aforementioned second sleeve 32, described central siphon portion by partition board portion 323 includes second section that first section and that is positioned at assembly space is positioned at activity space, and second sleeve 32 is in the peripheral ring portion 329 that forms a connection partition board portion 323 of central siphon portion 324 first sections, and central siphon portion 324 forms a mesopore that axially runs through, the end of described central siphon portion 324 second sections forms two and is radially correspondence and rubber-like shell fragment portion 3241, the end of described shell fragment portion 3241 respectively forms shape one butt projection 3245, form on the butt projection 3245 monocline to the inclined-plane, ring portion 329 inwalls of the first section periphery of described central siphon portion 324 form one or more end projections 3291, in this preferred embodiment, central siphon portion 324 first section outer peripheral faces have two and are radially relative positive stop 3242, has a spacing between positive stop 3242 and the partition board portion 323, still can form a plurality of raised lines that extend axially and be distributed in distance 3243 at its extension portion 322 inwalls in described second sleeve 32, still can form two radially corresponding guiding projections 3244 on extension portion 322 inwalls.

As shown in Figure 1, described injection putter 4 is to be installed in movably in this first sleeve 31 and second sleeve 32, and can connect the piston 1A of ampoule 1, and described injection putter 4 comprises a body of rod 40 and an operating parts 41, wherein:

As Fig. 1 and shown in Figure 3, the described body of rod 40 axial ends are a drive division 401, the body of rod 40 axial other ends are bar connecting portion 402, and can be with the piston 1A in the drive division 401 direct butt ampoulies 1, perhaps, drive division 401 is in conjunction with the body of rod end block 403 of a circle, piston 1A with these body of rod end block 403 butt ampoulies 1, the bar connecting portion 402 of the body of rod 40 stretches out outside second sleeve 32 of shot sleeve group 3, the described body of rod 40 forms a plurality of driving thread segments 404 at its drive division 401 outer peripheral faces, these drive thread segments 404 along the body of rod 40 arrangement that axially continues, described driving thread segment 404 comprises a plurality of side by side adjacent and screw thread bars forward spiral, and a plurality of screw thread bars in the adjacent driven thread segment 404 are forward, and spiral is connected, the hop count of described driving thread segment 404 is to adjust according to actual installation ampoule specification, in this preferred embodiment, the drive division 401 of the body of rod 40 forms 18 sections and drives thread segment 404.

As shown in Figure 1, described operating parts 41 is connected to bar connecting portion 402 ends that the body of rod 40 stretches out second sleeve, 32 outsides.

As Fig. 1, Fig. 4, Fig. 8 and shown in Figure 9, in this preferred embodiment, described injection putter 4 still comprises a sliding sleeve 42, sliding sleeve 42 includes the Fixed Division 422 that a body 421 and forms in body 421 1 ends, described body 421 is to stretch in the activity space of extension portion 322 of second sleeve 32 movably and be sheathed on central siphon portion 324 outsides, a plurality of raised lines 3243 that second sleeve 32 forms in its extension portion 322 can contact sliding sleeve 42 outer peripheral faces, the bar connecting portion 402 of this body of rod 40 of Fixed Division 422 windings and this operating parts 41 and interlock together.

Described body 421 outer peripheral faces distribute and form a plurality of guide grooves 423, described guide groove 423 respectively has an axially extended straight trough portion and a spiral slot part, described straight trough portion has one first groove end and one second groove end lays respectively at axial two ends, described helicla flute portion is positioned at respectively between the two adjacent straight trough portions, and first groove end spiral one angle of slot part always in two adjacent straight trough portions and be connected the second groove end of another straight trough portion of side neighbour, in this preferred embodiment, these body 421 outer peripheral faces form two guide grooves 423, the straight trough portion of this two guide groove 423 is radially corresponding arranges, and described spiral slot part is spiral 180 degree and being connected between the two adjacent straight trough portions forward.As Fig. 1, Fig. 8 and shown in Figure 9, described sliding sleeve 42 provides the radially corresponding guiding projection 3244 of extension portion 322 inwalls two of second sleeve 32 to stretch into wherein respectively with two guide grooves 423 on its body 421, with this, when guiding projection 3244 is positioned at the straight trough portion of guide groove 423 of sliding sleeve 42, make injection putter 4 can axially promote piston 1A in the moving ampoule 1 forward; When guiding projection 3244 moves to the spiral slot part of guide groove 423, injection putter 4 can be moved in a spiral manner in the opposite direction, and have than the labour-saving operation convenience.

As Fig. 1, Fig. 4, Fig. 8 and shown in Figure 9, in this preferred embodiment, described sliding sleeve 42 inner peripheral surfaces form a plurality of monocline to chute portion 426, provide the butt projection 3245 of shell fragment portion 3241 ends of second sleeve, 32 central siphon portions 324 to be connected in the chute portion 426, described sliding sleeve 42 has the ring baffle 424 and of endoporus from the endoporus peritreme adapter portion 425 that 422 end directions extend towards the Fixed Division in order to the inner formation one of an end of attended operation part 41, form the winding space between the inwall of adapter portion 425 and Fixed Division 422, the perisporium distribution of adapter portion 425 is provided with a plurality of from its terminal axially extended joint-cutting 4251, make adapter portion 425 have expansion and regressive elasticity, adjacent rings baffle plate 424 places form a plurality of blocked holes 4221 on the Fixed Division 422 of this sliding sleeve 42, described blocked hole 4221 is communicated with the winding space, form the ring flange 405 of a radial projection on the bar connecting portion 402 of this body of rod 40, the end of bar connecting portion 402 forms flange 406, the body of rod 40 stretches into sliding sleeve 42 inside, in the adapter portion 425 of bar connecting portion 402 corresponding inserted in sliding sleeve 42 of the body of rod 40, ring flange 405 is connected to ring baffle 424 sides, and flange 406 is connected to adapter portion 425 ends and makes up.

As Fig. 1, Fig. 5 and shown in Figure 8, described operating parts 41 is positioned at the bar connecting portion 402 and sliding sleeve 42 of second sleeve, 32 outside winding bodies of rod 40, operating parts 41 comprises a knob 411 and and is formed at knob 411 inside and is the fit pipe portion 412 that axially protrudes out, the a plurality of fixation hooks 413 of fit pipe portion 412 terminal formation, operating parts 41 is set in 422 outsides, Fixed Division of sliding sleeve 42 with its knob 411, and fit pipe portion 412 stretches into the winding space in the Fixed Division 422 and is socketed in adapter portion 425 outsides, and these a plurality of fixation hooks 413 are buckled in respectively in the blocked hole 4221 of Fixed Division 422 of sliding sleeve 42, make operating parts 41, sliding sleeve 42 and the body of rod 40 threes are together affixed, and knob 411 outer peripheral faces of operating parts 41 still can form concavo-convex anti-slip section.

In the preferred embodiment as shown in Figure 1, engagement end portion 312 sides of described first sleeve 31 still can further form a plurality of para-position protuberances 314, each grab 313 submission staggered arrangement row of this each para-position protuberance 314 and this; The socket pipe portion 321 of described second sleeve 32 still can further form a plurality of para-position recesses 3211 corresponding to para-position protuberance 314 at its installation opening place, cooperate with the concavo-convex of para-position recess 3211 by para-position protuberance 314, and make of the socket pipe portion 321 firmly winding of the engagement end portion 312 of first sleeve 31 with second sleeve 32.

As Fig. 1, Fig. 3, shown in Figure 4, described counting torus 5 comprises a ring body 50, a plurality of sheet 52 and fasteners 53 of colluding, this counting torus 5 is installed in the assembly space of second sleeve 32, and be socketed in drive division 401 outsides of the body of rod 40 of injection putter 4, described ring body 50 inner peripheral surfaces form a plurality of interference screw threads 51, described interference screw thread 51 is spirals forward, and the driving thread segment 404 of described interference screw thread 51 alternative engagement body of rod drive divisions 401,, can utilize to drive thread segment 404 and drive 5 rotations of counting torus in shot sleeve group 3 during rectilinear motion with this injection putter 4; Described a plurality of collude sheet 52 and this fastener 53 be annular array form in the side of ring body 50 towards partition board portion 323, described a plurality of sheet 52 that colludes is to be equidistant arrangement spaced apart, and collude and be against on the positive stop 3242 with the described sheet 52 that colludes, make counting torus 5 only can fix a point to rotate, and the end projection 3291 of second sleeve 32 is resisted against the two adjacent gap locations that collude between sheet 52 ends, the fastener 53 terminal recessed edge 531 of blocking that form, serves as when holding projection 3291 blockings with this at the recessed edge 531 of blocking, counting torus 5 is fastened in the shot sleeve group 3 and can not rotates, and can stop directly advancing of injection putter 4.

As shown in Figure 1, described protecting cover 6 includes a lid, one end of lid is that opening, the other end are blind end, in order to be socketed in first sleeve, 31 outsides of injection needle and shot sleeve group 3, avoid user or his artificial injection needle 2 to stab, in this preferred embodiment, described protecting cover 6 still can form the clamping part of a strip at its lid side, makes protecting cover 6 can utilize clamping part to be clamped on the object.

This utility model metering formula syringe preferred embodiment in use, as Fig. 1 and Fig. 5, shown in Figure 8, be will in fixed dosage injection medicament is housed ampoule 1 be installed in the shot sleeve group 3 that first sleeve 31 and second sleeve 32 formed, and make group be located at piston 1A in the body of rod end block 403 butt ampoulies 1 on the body of rod 40 of the injection putter 4 in second sleeve 32, the syringe needle that again injection needle 2 is socketed on shot sleeve group 3 connects end 311, the needle body of injection needle 2 puncture section punctured ampoule 1 closure body and stretch in the ampoule 1, the usefulness of user injection is provided, described ampoule is after use, also can take out from this metering formula syringe, this metering formula syringe can repeat repeatedly to use.

When this metering formula syringe preferred embodiment on human body during injection medicament, user promotes the piston 1A that injection putter 4 promotes in the ampoule 1, and make the medicament in the ampoule 1 enter human body by injection needle, in addition be pushed and directly advance in the process at injection putter 4, utilize the driving thread segment 404 on its body of rod 40 to interfere the engagement drive of screw thread 51 to make counting torus 5 produce rotation one lattice (promptly cross over and collude sheet 52), count and use 1 time by ring body 50 inner faces of counting torus 5.

After the injection medicament of metering formula syringe in ampoule 1 uses, can utilize injection putter 4 rotation mode labour-saving to pull out in the other direction, at this moment, ring body 50 inner faces of counting torus 5 interfere the body of rod 40 outer peripheral faces of screw thread 51 and injection putter 4 to drive thread segment 404 all to be screw thread forward, so the body of rod 40 of injection putter 4 slips in the ring body 50 of counting torus 5, counting torus 5 does not rotate.

So, make this metering syringe reusable, and when using syringe to inject each time, promptly utilize the translatory movement of injection putter 4 in shot sleeve group 3 to drive counting torus 5 rotations one lattice metering via driving thread segment 404, when the reusable number of times accumulative total of syringe reaches set point number, counting torus 5 is stuck in shot sleeve group 3, can't re-use and this syringe function was lost efficacy.

By above explanation as can be known, in the metering formula syringe that this utility model proposed, only order relates to the syringe needle of safety in utilization and the ampoule of interior dress fixed dosage injection medicament is deserted member, remaining combination type shot sleeve group, injection putter and protecting cover etc. can both repeat repeatedly to utilize again, and when the access times that can make this metering formula syringe arrive predetermined times, the effect of this syringe was lost efficacy and can not use, guarantee that this metering formula syringe avoids excessively being reused, with the safety of safeguarding that syringe uses.

The above only is a preferred embodiment of the present utility model, be not that this utility model is done any pro forma restriction, though this utility model discloses as above with preferred embodiment, yet be not in order to limit this utility model, any those skilled in the art, in the scope that does not break away from technical solutions of the utility model, should utilize the technology contents of above-mentioned announcement to make a little change or be modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.

Claims

1. a metering formula syringe is characterized in that, comprises:

One shot sleeve group, it comprises first sleeve of a hollow and second sleeve of a hollow, described first sleeve is in order to provide an ampoule, first sleeve, one end has a syringe needle and connects the end, syringe needle connects the end and establishes on it in order to an injection needle group to be provided, the first telescopic other end has an engagement end portion, second sleeve comprises a socket pipe portion and is connected with one in the extension portion of socket pipe portion one end, and with the socket pipe portion removable group of ground winding first telescopic engagement end portion, described second sleeve inner forms a partition board portion between socket pipe portion and extension portion, and one by this partition board portion and have the central siphon portion of mesopore, second sleeve connects the ring portion of partition board portion towards the peripheral formation one of first a telescopic end in central siphon portion, described ring portion inwall forms at least one end projection, central siphon portion has two towards first a telescopic end section outer peripheral face and is radially relative positive stop, has a spacing between positive stop and the partition board portion;

2. metering formula syringe according to claim 1, it is characterized in that, the described first telescopic engagement end portion side is formed with a plurality of grabs that are distributed in distance, described partition board portion is divided into the activity space that an assembly space and that is positioned at socket pipe portion is positioned at extension portion with the second sleeve inner space region, described socket pipe portion outer peripheral face forms the tab portion that outwards protrudes out, the described second telescopic assembly space forms an installation opening at place, socket pipe portion outer end, this socket pipe portion contiguous installation opening place in activity space forms a blocking flange, socket pipe portion periphery wall forms and a plurality ofly pushes shrapnel and form the line of rabbet joint at the periphery that pushes shrapnel, the blocking flange can hook joint the grab of the first telescopic engagement end portion, pushing shrapnel can be pressed and push against grab and break away from the blocking flange.

3. metering formula syringe according to claim 2, it is characterized in that, the described second telescopic central siphon portion comprises second section that first section and that is positioned at assembly space is positioned at activity space, and the described second telescopic extension portion inwall forms two radially corresponding guiding projections; Described injection putter comprises a sliding sleeve, sliding sleeve has the Fixed Division that a body and forms in body one end, described body stretches in the activity space of the second telescopic extension portion movably and is sheathed on the central siphon portion outside, the bar connecting portion of this body of rod of Fixed Division winding and this operating parts and interlock together; Described body outer peripheral face distributes and forms two guide grooves, described guide groove respectively has an axially extended straight trough portion and a spiral slot part, described straight trough portion has one first groove end and one second groove end lays respectively at axial two ends, described helicla flute portion is positioned at respectively between the two adjacent straight trough portions, and the first groove end spiral, 180 degree of the slot part always in two adjacent straight trough portions and be connected the second groove end of another straight trough portion of side neighbour, described sliding sleeve provides the second telescopic extension portion inwall two radially corresponding guiding projections to stretch into wherein respectively with two guide grooves on its body.

4. metering formula syringe according to claim 3, it is characterized in that, the described second telescopic central siphon portion second segment ends forms two and is radially corresponding shell fragment portion, the end of described shell fragment portion respectively forms a butt projection with monocline face, described sliding sleeve inner peripheral surface form a plurality of monocline to chute portion, the butt projection of the shell fragment portion end of the second sleeve central siphon portion is connected in the chute portion.

5. metering formula syringe according to claim 4, it is characterized in that, a described end that slides over the attended operation part is inner form a ring baffle and with endoporus from the endoporus peritreme towards adapter portion that the Fixed Division end direction extends, form the winding space between adapter portion and the Fixed Division inwall, the perisporium distribution of adapter portion is provided with a plurality of from its terminal axially extended joint-cutting, make adapter portion have expansion and regressive elasticity, adjacent rings baffle plate place forms a plurality of blocked holes on the Fixed Division of this sliding sleeve, and described blocked hole is communicated with the winding space;

Form the ring flange of a radial projection on the bar connecting portion of this body of rod, the terminal flange that forms of bar connecting portion, the body of rod stretches into sliding sleeve inside, and the bar connecting portion corresponding inserted of the body of rod is in the adapter portion of sliding sleeve, ring flange is connected to the ring baffle side, and flange is connected to adapter portion end and makes up;

Described operating parts comprises a knob and is formed at knob inside and is the fit pipe portion that axially protrudes out, the a plurality of fixation hooks of the terminal formation of fit pipe portion, operating parts is sheathed on the outside, Fixed Division of sliding sleeve with knob, fit pipe portion stretches into the winding space of Fixed Division and is socketed on the adapter portion outside, and these a plurality of fixation hooks are buckled in respectively in the blocked hole of Fixed Division of sliding sleeve.

6. according to each described metering formula syringe in the claim 2 to 5, it is characterized in that the described first telescopic engagement end portion side forms a plurality of para-position protuberances, this each para-position protuberance and these grabs submission staggered arrangement row; The described second telescopic socket pipe portion further forms a plurality of para-position recesses corresponding to the para-position protuberance at its installation opening place, the para-position protuberance is concavo-convex with the para-position recess and cooperates.