CN105107062A - Auto-disable syringe - Google Patents
Auto-disable syringe Download PDFInfo
- Publication number
- CN105107062A CN105107062A CN201510533673.8A CN201510533673A CN105107062A CN 105107062 A CN105107062 A CN 105107062A CN 201510533673 A CN201510533673 A CN 201510533673A CN 105107062 A CN105107062 A CN 105107062A
- Authority
- CN
- China
- Prior art keywords
- needle stand
- lower needle
- core bar
- strobilus masculinus
- overcoat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses an auto-disable syringe. Needle seats and the limiting design of the needle seats and an outer sleeve are improved, and therefore the anti-retreating capacity of the auto-disable syringe can be kept for a long time. The auto-disable syringe comprises the outer sleeve, a core rod, a piston and a needle seat assembly. A guide cone head with a conical shaft shoulder is arranged on the head portion of the core rod, the needle seat assembly is formed by assembling the upper needle seat and the lower needle seat, the front portion of the upper needle seat serves as a puncture needle connecting portion, the rear portion of the upper needle seat is matched with the inner conical face of the front portion of the lower needle seat through a combined conical face, and an outer protruding rib at the rear end of the outer conical face of the front portion of the lower needle seat is correspondingly limited by an inner protruding rib at the rear end of the inner conical face on the lower needle seat. A conical face matching segment of the lower needle seat is of an expandable structure, a limiting matching structure corresponding to the corresponding structure of the inner wall of the outer sleeve is arranged on the outer circle of the conical face matching segment, an inner spigot matched with the conical shaft shoulder is arranged on the rear portion of the lower needle seat, and when the core rod retreats to the conical shaft shoulder to be in contact with the inner spigot, the outer protruding rib is still kept spaced from the inner protruding rib. Therefore, the anti-retreating capacity of a needle point of the syringe can be kept, good sliding performance is kept when the syringe sucks liquid medicine, and tension needed in needle contracting and disfigurement process is reduced.
Description
Technical field
The present invention relates to a kind of syringe, especially a kind of self-destruction syringe realizing in overcoat unmaking of being pulled back by needle stand by core bar.
Background technology
Along with the continuous popularization of safety injection, the self-destruction syringe with self-destroying function has been widely used in clinical.At present, puncture needle retracting type self-destroyed syringe due to can available protecting medical personnel, prevents unexpected injury and becomes the main flow of self-destruction syringe.
In the Chinese invention patent " two-stage separate type safe self-destruction syringe " that the notification number announced on July 11st, 2012 is CN102553036A, to lock conehead, Connection Block is assembled into split type needle stand, arrange first thereon respectively, second non-return structure, and correspondence arranges first and second at core bar leading portion axially spaced-apart unmakes structure, the larger frictional force produced when being separated is resolved into successively two parts comparatively less friction, can effectively control product separation power, thus the object only need pulled back with regard to realizing being separated self-destruction by low-force when being separated self-destruction, medical personnel are facilitated to operate, two inclined-planes of correspondence position on locking conehead and Connection Block are utilized to coordinate the effect producing lateral expansion power, increase frictional force when being separated, product is made not have to be separated in the use procedure before unmaking, be unlikely puncture needle rollback and cause can not completing injection, aspiration medicinal liquid or causing leakage, and structure is easy to assembly, be suitable for batch production.
But the needle stand design of existing two-stage separate type safe self-destruction syringe still has necessity of improvement.Reason is it is utilize local interference fit to realize spacing between the Connection Block of its needle stand and overcoat, and once the aging distortion of plastic material, the tension force of Fit diminishes gradually, when carrying out injection puncture, anti-back power index reduces, even anti-back power can not meet the demands, and occurs the phenomenon of the withdraw of the needle when injecting.After producing 2 ~ 5 years, easily there is problems in most products.Therefore, need to further improve syringe construction, to keep its anti-back power.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of improvement needle stand itself and design spacing with overcoat thereof, thus the self-destruction syringe that anti-back power can keep for a long time.
The technical solution adopted for the present invention to solve the technical problems is: self-destruction syringe, comprise overcoat, core bar, piston and hub assemblies, front hermetically-sealed construction is provided with between hub assemblies and overcoat, core bar and overcoat sliding connection, core bar is socketed with piston as the rear hermetically-sealed construction between core bar and overcoat, the leading portion of core bar is provided with structure of unmaking, hub assemblies is provided with the non-return structure with the respective outer side edges of unmaking of core bar, described hub assemblies is assembled by upper needle stand and lower needle stand, the front portion of upper needle stand is puncture needle connecting portion, the rear portion of upper needle stand is that diameter reduces the male cone (strobilus masculinus) of change from front to back, the rear end of male cone (strobilus masculinus) is provided with outer convex rib, male cone (strobilus masculinus) coordinates with the inner conical surface of lower needle stand front portion, the axial length of male cone (strobilus masculinus) is greater than the axial length of inner conical surface, outer convex rib is then corresponding spacing with the inner convex rib lower needle stand being arranged at inner conical surface rear end, lower needle stand from its front end face until the part of its inner conical surface rear end is cone match section, cone match section is expandable structure, its cylindrical is provided with the spacing fit structure corresponding with outer casing inner wall corresponding construction, at the rear portion of lower needle stand, described non-return structure is set.The cooperation place of upper and lower needle stand adopts aforesaid pyramidal structure, on the axial penetration Resistance warp produced when injecting, needle stand is passed to lower needle stand, outside tension force is produced at upper and lower needle stand contact surface, and lower needle stand leading portion designs for inflatable, outwards expand under tension, so just, make lower needle stand leading portion cylindrical is combined tightr with the spacing fit structure of outer casing inner wall, thus increase backing resistance, changing the conventional anti-withdraw of the needle mode of interference fit is seam anti-back pin mode, maintains the anti-back power needed for self-destruction syringe better.
The part that described core bar is positioned at piston nose is the guiding conehead as structure of unmaking, the stage casing of guiding conehead is provided with the pre-small post-large taper shaft shoulder, with as non-return structure, the inner stopper that is arranged on lower needle stand rear end is corresponding spacing, the postmedian of guiding conehead is provided with perpendicular to hollow groove through on its axis direction.Hollow groove design suitably weakens the intensity of core bar head, thus make the structure of unmaking of core bar in injection process, needle stand can be entered smoothly, and can resilience restore after entering needle stand, thus pull back in the process of unmaking, the taper shaft shoulder is corresponding with inner stopper spacing, realizes the pulling force effect to needle stand.
The height of the described taper shaft shoulder equals the anchor ring width of described inner stopper, and the width of hollow groove is the twice of described inner stopper anchor ring width.The width of hollow groove is unsuitable too small, if width is too small, core bar intensity is excessive, and core bar can not steadily import in needle stand, simultaneously, the width of hollow groove is unsuitable wide, because core bar head sizes is less, the wide tension force that can not ensure core bar head, pulling force may be too small, can not needle stand be taken out of, thus can not unmake.The size of more than recommending, can ensure normal injection residual quantity and pull back reliably to unmake.
Described male cone (strobilus masculinus) is the combination conical surface that leading portion male cone (strobilus masculinus) and back segment male cone (strobilus masculinus) combine, the cone angle of leading portion male cone (strobilus masculinus) is greater than the cone angle of back segment male cone (strobilus masculinus), back segment male cone (strobilus masculinus) coordinates with the inner conical surface of lower needle stand front portion, prevent needle stand and lower needle stand to be engaged too dead and impact slip to axial therebetween, the pull-back forces that makes to unmake is excessive and be not easy to operation.
The front end of the cone match section of described lower needle stand is provided with male half coupling, with the groove fit being arranged on outer casing inner wall correspondence position, spacing fit structure described in formation, upper needle stand being provided with the shoulder block corresponding with groove front position, producing axial force when injecting puncture., the end contact of shoulder block and lower needle stand, lower needle stand is spacing by outer casing inner wall, guarantee the not withdraw of the needle, the width of groove is greater than the width of male half coupling, to form suitable expansion spatial accommodation.
The anchor ring width of described inner stopper is less than the spacing between the upper conical shaft shoulder of core bar and piston, unmake structure function when non-return structure, also interval is maintained between described outer convex rib and inner convex rib, first lower needle stand is realized sliding axially of certain distance from upper needle stand, lower needle stand bounces back from swelling state, reduce lower frictional force between needle stand and overcoat, following needle stand pulls needle stand, thus reduce to unmake pulling force used, handled easily.
The outer wall of described puncture needle connecting portion is provided with the bulge loop of interference fit between outer casing inner wall, and as hermetically-sealed construction before described, local interference can keep sealing, is convenient to again assembling.
The cone match section of described lower needle stand is provided with the radial slot of more than three of the distribution that is centrosymmetric extended in the axial direction backward from front end face, processes easy, can reach again the object that can outwards expand.
The invention has the beneficial effects as follows: the anti-back power that can keep syringe, maintenance syringe shifts the propulsive force during end onto, reduces pulling force required when shortening is unmake.
Accompanying drawing explanation
Fig. 1 is the structural representation of self-destruction syringe of the present invention.
Fig. 2 is the partial enlarged drawing in A portion in Fig. 1.
Fig. 3 is the partial enlarged drawing in D portion in Fig. 1.
Fig. 4 is the front view of upper needle stand in Fig. 1.
Fig. 5 is the top view of Fig. 4.
Fig. 6 is the B-B sectional view of Fig. 4.
Fig. 7 is the front view of lower needle stand in Fig. 1.
Fig. 8 is the top view of Fig. 7.
Fig. 9 is the C-C sectional view of Fig. 8.
Figure 10 is the view that structure pulls back when contacting with non-return structure of unmaking.
Be labeled as in figure: core bar 1, overcoat 2, piston 3, lower needle stand 4, upper needle stand 5, sheath 6, puncture needle 7, guiding conehead 10, hollow groove 11, the taper shaft shoulder 12, interval 13, front end reducing 21, groove 22, cone match section 40, radial slot 41, male half coupling 42, inner conical surface 43, inner convex rib 44, inner stopper 45, puncture needle connecting portion 50, bulge loop 51, shoulder block 52, the combination conical surface 53, outer convex rib 54, diminished shaft shoulder height H, inner stopper anchor ring width B 1, hollow groove width B 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Fig. 1 ~ Figure 10, self-destruction syringe of the present invention comprises overcoat 2, core bar 1, piston 3 and hub assemblies, core bar 1 and overcoat 2 sliding connection, piston 3 is set between core bar 1 and overcoat 2 as rear hermetically-sealed construction, hub assemblies is assembled by upper needle stand 5 and lower needle stand 4, the front end of upper needle stand 5 is spacing by the front end reducing 21 of overcoat 2, the puncture needle connecting portion 50 of upper needle stand 5 front end is connected with puncture needle 7, and be connected on overcoat 2 by sheath 6 and cover puncture needle 7, the outer wall of puncture needle connecting portion 50 is provided with the bulge loop 51 of interference fit between overcoat 2 inwall, form the front hermetically-sealed construction between overcoat 2 and hub assemblies, the rear portion of upper needle stand 5 is the combination conical surface 53 that leading portion male cone (strobilus masculinus) and back segment male cone (strobilus masculinus) combine and the outer convex rib 54 combining the conical surface 53 rear end, wherein, the cone angle of leading portion male cone (strobilus masculinus) is greater than the cone angle of back segment male cone (strobilus masculinus), back segment male cone (strobilus masculinus) coordinates with the inner conical surface 43 of lower needle stand 4 front portion, outer convex rib 54 is corresponding spacing by the inner convex rib 44 of inner conical surface 43 rear end on lower needle stand 4, lower needle stand 4 from its front end face until the part of its inner conical surface 43 rear end is cone match section 40, cone match section 40 is for being provided with three radial slots 41 of the distribution that is centrosymmetric extended in the axial direction backward from front end, formed inflatable, contractile structure, the front end of cone match section 40 is provided with the male half coupling 42 to the corresponding cooperation of groove 22 on overcoat 2 inwall, form the spacing fit structure between hub assemblies and overcoat 2, the width of groove 22 is greater than the width of male half coupling 42, corresponding expansion space is had when lower needle stand 4 is outwards expanded, for ease of the assembling of hub assemblies and overcoat 2, the front end face of lower needle stand 4 arranges chamfering, accordingly, the transition of groove 22 Leading end chamfer, upper needle stand 5 is provided with the shoulder block 52 corresponding with groove 22 front position, guarantee the not withdraw of the needle, the part that core bar 1 is positioned at piston 3 front end is the guiding conehead 10 as structure of unmaking, the stage casing of guiding conehead 10 is provided with the pre-small post-large taper shaft shoulder 12, with as non-return structure, the inner stopper 45 being arranged on lower needle stand 4 rear end is corresponding spacing, the postmedian of guiding conehead 10 is provided with perpendicular to hollow groove 11 through on its axis direction, diminished shaft shoulder height degree H=inner stopper anchor ring width B 1, the twice of hollow groove width B 2=inner stopper anchor ring width B 1, ensure normal injection and pull back reliably to unmake, inner stopper 45 and the taper shaft shoulder 12 are combined into core bar and pull back position limiting structure.
For injection, above structural design works like this:
Take off sheath 6, core bar 1 is pulled to slidably reciprocate, now must not note and allow the taper shaft shoulder 12 enter in inner stopper 45, suction medicinal liquid, entry needle upwards, core bar 1 deaeration is pushed away slowly, start injection, puncture needle 7 enters muscle, is subject to resistance, when stiction only between top needle stand 5 and overcoat 2 is also not enough to overcome, upper needle stand 5 moves backward, because of lower needle stand 4 and the cone match of upper needle stand 5, the cone match section 40 of lower needle stand 4 is expanded, lower needle stand 4 becomes more tight with coordinating between overcoat 2, stops the withdraw of the needle, core bar 1 continues to push ahead, enter in core bar 1 front end in lower needle stand 4 process, guiding conehead 10 is squeezed and elastic deformation or slight plastic deformation occurs, the taper shaft shoulder 12 portion retracts, make the taper shaft shoulder 12 part of core bar 1 can smoothly by inner stopper 45 that lower needle stand 4 rear end is arranged, enter lower needle stand 4, continue to push away forward, enter after lower needle stand 4 completely until core bar 1 head, hollow groove 11 on core bar 1 returns to original state substantially, continue injection, until piston 3 contacts with the rear end face of lower needle stand 4, keep propulsive force when being expelled to the end, after having injected, to pull back core bar 1, core bar 1 moves after driving lower needle stand 4, lower needle stand 4 retreats relative to upper needle stand 5, cone match section 40 swelling state is removed gradually, lower needle stand 4 all becomes relative loosening with the cooperation between upper needle stand 5 and overcoat 2, thus reduce the required pulling force of pulling back that unmakes, the taper shaft shoulder 12 and inner stopper 45 form core bar and pull back to restrict and mate, the taper shaft shoulder 12 on core bar 1 interacts with the inner stopper 45 of lower needle stand 4, hook is held lower needle stand 4 and is together pulled back, the taper shaft shoulder 12 return contact with inner stopper 45 time, interval 13 is also maintained between described outer convex rib 54 and inner convex rib 44, continue to pull back, the male half coupling 42 of lower needle stand 4 departs from groove 22 and enters the less part of overcoat 2 internal diameter, lower needle stand 4 front end is shunk further, inner convex rib 44 under ensureing on needle stand 4 reliably hook holds the outer convex rib 54 on upper needle stand 5, in drive, needle stand 5 is got back in overcoat 2 together, puncture needle 7 is made to get back to home, complete self-destruction.
Above respective outer side edges is ingenious, and overall performance is excellent, and each design of part is simple simultaneously, is easy to make.
Claims (8)
1. self-destruction syringe, comprise overcoat (2), core bar (1), piston (3) and hub assemblies, front hermetically-sealed construction is provided with between hub assemblies and overcoat (2), core bar (1) and overcoat (2) sliding connection, core bar (1) is socketed with piston (3) as the rear hermetically-sealed construction between core bar (1) and overcoat (2), the leading portion of core bar (1) is provided with structure of unmaking, hub assemblies is provided with the non-return structure with the respective outer side edges of unmaking of core bar (1), it is characterized in that: described hub assemblies is assembled by upper needle stand (5) and lower needle stand (4), the front portion of upper needle stand (5) is puncture needle connecting portion (50), the rear portion of upper needle stand (5) is that diameter reduces the male cone (strobilus masculinus) of change from front to back, the rear end of male cone (strobilus masculinus) is provided with outer convex rib (54), male cone (strobilus masculinus) coordinates with the inner conical surface (43) of lower needle stand (4) front portion, the axial length of male cone (strobilus masculinus) is greater than the axial length of inner conical surface (43), outer convex rib (54) is then corresponding spacing with the inner convex rib (44) lower needle stand (4) being arranged at inner conical surface (43) rear end, lower needle stand (4) from its front end face until the part of its inner conical surface (43) rear end is cone match section (40), cone match section (40) is expandable structure, its cylindrical is provided with the spacing fit structure corresponding with overcoat (2) inwall corresponding construction, at the rear portion of lower needle stand (4), described non-return structure is set.
2. self-destruction syringe as claimed in claim 1, it is characterized in that: the part that described core bar (1) is positioned at piston (3) front end is the guiding conehead (10) as structure of unmaking, the stage casing of guiding conehead (10) is provided with the pre-small post-large taper shaft shoulder (12), with as non-return structure, the inner stopper (45) that is arranged on lower needle stand (4) rear end is corresponding spacing, the postmedian of guiding conehead (10) is provided with perpendicular to hollow groove (11) through on its axis direction.
3. self-destruction syringe as claimed in claim 2, it is characterized in that: the height (H) of the described taper shaft shoulder (12) equals described inner stopper (45) anchor ring width (B1), the twice that the width (B2) of hollow groove (11) is described inner stopper (45) anchor ring width (B1).
4. self-destruction syringe as claimed in claim 1, it is characterized in that: described male cone (strobilus masculinus) is the combination conical surface (53) that leading portion male cone (strobilus masculinus) and back segment male cone (strobilus masculinus) combine, the cone angle of leading portion male cone (strobilus masculinus) is greater than the cone angle of back segment male cone (strobilus masculinus), and back segment male cone (strobilus masculinus) coordinates with the inner conical surface (43) of lower needle stand (4) front portion.
5. the self-destruction syringe as described in claim 1,2,3 or 4, it is characterized in that: the front end of the cone match section (40) of described lower needle stand (4) is provided with male half coupling (42), coordinate with the groove (22) being arranged on overcoat (2) inwall correspondence position, spacing fit structure described in formation, upper needle stand (5) is provided with the shoulder block (52) corresponding with groove (22) front position, the width of groove (22) is greater than the width of male half coupling (42).
6. self-destruction syringe as claimed in claim 2 or claim 3, it is characterized in that: the anchor ring width (B1) of described inner stopper (45) is less than the spacing (B2) between core bar (1) the upper conical shaft shoulder (12) and piston (3), unmake structure function when non-return structure, between described outer convex rib (54) and inner convex rib (44), also maintains interval (13).
7. the self-destruction syringe as described in claim 1,2,3 or 4, is characterized in that: the outer wall of described puncture needle connecting portion (50) is provided with the bulge loop (51) of interference fit between overcoat (2) inwall, as hermetically-sealed construction before described.
8. the self-destruction syringe as described in claim 1,2,3 or 4, is characterized in that: the cone match section (40) of described lower needle stand (4) is provided with the radial slot (41) of more than three of the distribution that is centrosymmetric extended in the axial direction backward from front end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510533673.8A CN105107062B (en) | 2015-08-27 | 2015-08-27 | Self-destruction syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510533673.8A CN105107062B (en) | 2015-08-27 | 2015-08-27 | Self-destruction syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105107062A true CN105107062A (en) | 2015-12-02 |
| CN105107062B CN105107062B (en) | 2018-09-18 |
Family
ID=54655323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510533673.8A Active CN105107062B (en) | 2015-08-27 | 2015-08-27 | Self-destruction syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105107062B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105771036A (en) * | 2016-03-29 | 2016-07-20 | 陆盘中 | Disposable locking safety auto-disable syringe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2845821Y (en) * | 2005-11-18 | 2006-12-13 | 林作钱 | Safety self destroying medical syringe |
| CN2863143Y (en) * | 2005-12-07 | 2007-01-31 | 林作钱 | Safe self-destruction syringe |
| CN102327658A (en) * | 2011-10-20 | 2012-01-25 | 柏保东 | Easily-assembled high-safety self-destruction injector |
| CN102553036A (en) * | 2012-01-19 | 2012-07-11 | 陆盘中 | Two-stage separate type safe self-destruction syringe |
| CN202387067U (en) * | 2011-12-15 | 2012-08-22 | 江西三鑫医疗科技股份有限公司 | Novel retraction self-destruction type syringe |
| CN203749949U (en) * | 2014-01-23 | 2014-08-06 | 陆盘中 | Self-destructive disposable syringe |
| CN205041906U (en) * | 2015-08-27 | 2016-02-24 | 陆盘中 | Auto -disable syringe |
-
2015
- 2015-08-27 CN CN201510533673.8A patent/CN105107062B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2845821Y (en) * | 2005-11-18 | 2006-12-13 | 林作钱 | Safety self destroying medical syringe |
| CN2863143Y (en) * | 2005-12-07 | 2007-01-31 | 林作钱 | Safe self-destruction syringe |
| CN102327658A (en) * | 2011-10-20 | 2012-01-25 | 柏保东 | Easily-assembled high-safety self-destruction injector |
| CN202387067U (en) * | 2011-12-15 | 2012-08-22 | 江西三鑫医疗科技股份有限公司 | Novel retraction self-destruction type syringe |
| CN102553036A (en) * | 2012-01-19 | 2012-07-11 | 陆盘中 | Two-stage separate type safe self-destruction syringe |
| CN203749949U (en) * | 2014-01-23 | 2014-08-06 | 陆盘中 | Self-destructive disposable syringe |
| CN205041906U (en) * | 2015-08-27 | 2016-02-24 | 陆盘中 | Auto -disable syringe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105771036A (en) * | 2016-03-29 | 2016-07-20 | 陆盘中 | Disposable locking safety auto-disable syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105107062B (en) | 2018-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100425303C (en) | Safe self-destruction syringe for medical purpose | |
| CN201213949Y (en) | Novel safe self-locking type self-destruction injector | |
| CN102791312A (en) | Retractable syringe with improved delivery efficiency and locking system | |
| CN201469833U (en) | Improved safety injector | |
| CN104667390B (en) | safety syringe | |
| CN101862490A (en) | Self-destruction insulin syringe capable of replacing needle | |
| CN205041906U (en) | Auto -disable syringe | |
| CN102284113A (en) | Safe self-destructive injector with replaceable needle head and locking structure | |
| CN105107062A (en) | Auto-disable syringe | |
| CN101347648B (en) | Self-locking type self-breaking syringe | |
| WO2015070523A1 (en) | Pulled-back fixed-needle safe self-destroying syringe | |
| CN101513547B (en) | Small-dose safety destructing insulin syringe | |
| CN102553036B (en) | Two-stage separate type safe self-destruction syringe | |
| CN202777327U (en) | Automatic retracting self-destruction injector | |
| CN110812606A (en) | Hand-operated locking type syringe | |
| CN102284112A (en) | Safe self-destructing injector with locking structure | |
| CN201735029U (en) | Safe self-destructive syringe with replaceable needle with locking structure | |
| CN113230501B (en) | Injection device with fixed dose self-destruction function | |
| CN201179246Y (en) | Safe syringe | |
| CN115154757A (en) | Stable form injection device for children vaccination | |
| CN212187350U (en) | Hand-operated locking type syringe | |
| CN202459662U (en) | Secondary separation type safe self-destruction syringe | |
| CN201701571U (en) | Needle-exchangeable self-destruction-type insulin syringe | |
| CN205626627U (en) | Once only lock safe self -destruction formula syringe | |
| CN103656799A (en) | Prefilling injector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |