CN100546666C - Single-Use Auto-Disable Syringes - Google Patents

Abstract

The present invention relates to a kind of Single-Use Auto-Disable Syringes that can only once take out full medicinal liquid.More particularly taking out full back self-destruction part in injection process at medicinal liquid has begun to work, it can only be pushed ahead, again can't be by pumpback, the Single-Use Auto-Disable Syringes that can't be used again in any way, it comprises needle point (1), cylindrical shell (2), core bar (3), non return part (7), sealing-plug (10) and needle guard (14).It is characterized in that: core bar (3) is provided with ratchet slot (4), limit rank (5), installing hole (6), first motive position (11), second motive position (12) and ruin disconnected place (13) repeatedly repeatedly that returns to Chinese Taiwan, and non return part (7) is provided with non-return and stings (8) and ratchet (9).The present invention is more suitable for the less micro-injection of residual quantity, immunity inoculation injection and injection of insulin, and is simple and easy to use, self destruction after once use.

Description

Single-Use Auto-Disable Syringes

Technical field

The present invention relates to a kind of medical syringe, be more particularly to a kind of Single-Use Auto-Disable Syringes.

Background technology

At present international and domestic for preventing the cross infection of iatrogenic disease, begin requirement and used disposable self-destruction syringe, reach self-destruction from structure.For example, domestic and international more known self-destruction syringes, more multi-form be when the injector to inject medicinal liquid finishes, destruction piston and core bar press on earth that (as long as promptly leaving a little medicinal liquid) piston just can not destroy, and can also reuse.In June, 2003, our company was for improving the deficiency of above technology, having designed from the start injection medicinal liquid is a kind of Single-Use Auto-Disable Syringes that self-destruction comes into force, promptly (Single-Use Auto-Disable Syringes of medicinal liquid can only be once extracted), medicinal liquid can not be extracted once more after injection finishes.Declare patent in June, 2003, obtained higher evaluation simultaneously clinically.But this patent also exists some deficiency, as reinstalling,, sensuously can also reuse though can bring drainage when using with also taking the syringe of self-destruction apart someway, not talkatively really reach disposable completely use, its structure needs further improvement.

Summary of the invention

The object of the present invention is to provide a kind of can reach fully after the disposable use can self-destruction syringe, more particularly take out full back self-destruction part in injection process and work at medicinal liquid.During injection because the ratchet on the non return part withstands ratchet slot on the core bar, sealing-plug and core bar can only forward end advance along the barrier part inwall, under any circumstance want core bar is outwards pulled out, no matter be counter-rotating or forward rotate a little core bar of exerting oneself and ruin disconnected place and promptly rupture through torsion, in office where FAXIA can't be opened once more is mounted, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this, and it comprises needle point 1, barrier part 2, core bar 3, non return part 7, sealing-plug 10 and needle guard 14.

It is characterized in that: core bar 3 is provided with ratchet slot 4, limit rank 5, installing hole 6, first motive position 11, second motive position 12 and ruin disconnected place 13 repeatedly repeatedly that returns to Chinese Taiwan.

It is characterized in that: non return part 7 is provided with non-return thorn 8 and ratchet 9.

It is characterized in that: the ratchet slot on the core bar 3 can be according to clinical demand, can be one or a plurality of, number is few more, the zone length of motive position is big more repeatedly, otherwise number is many more, the zone length of motive position is more little repeatedly.

It is characterized in that: when the injection beginning, owing to will observe whether the blood back phenomenon is arranged, so, second motive position 12 zone lengths should be greater than the length dimension 0.6mm to 2.5mm of non return part 7 repeatedly on the core bar 3, in addition first repeatedly the length of motive position 11 are how many decisions according to the ratchet slot on the core bar 3, the ratchet slot number is many, and movement length is little, the ratchet slot number is few, and movement length is big.

It is characterized in that: the bonding strength that ruining 13 places, disconnected place on the core bar 3 requires in counter-rotating or can award fracture when forward rotating.

It is characterized in that: non return part 7 usefulness steel discs are made, and two thorn spacings of non-return thorn 8 should be installed in the cylindrical shell because the elastic energy thorn of two thorns is lived inwall greater than cylinder internal diameter.

It is characterized in that: needle point 1 also can be adhesive on the other split needle stand, be installed in then on cylindrical shell 2 heads, sealing-plug can be have a roundlet conehead or tack, as Figure 10, Figure 11.

The present invention compared with prior art since core bar in office where FAXIA can't be drawn out of, satisfied the requirement of the self-destruction of Single-Use Auto-Disable Syringes fully.

Description of drawings

Fig. 1 is an overall structure sketch map of the present invention;

Fig. 2 is the left TV structure sketch map of Fig. 1;

Fig. 3 is a structural representation of taking out full medicinal liquid;

Fig. 4 is the sketch map of injecting liquid drug after finishing;

Fig. 5, Fig. 6 be 11 first motive position zone sketch maps that can move repeatedly at non return part 7 places repeatedly when the drawing liquid;

Fig. 7 is certain structural representation of non return part 7;

Fig. 8 is the left TV structure sketch map of Fig. 7;

Fig. 9 is the post-rift sketch map of core bar;

Figure 10, Figure 11 are the sketch map of another kind of version of the present invention equally.

Among the figure: 1, needle point, 2, cylindrical shell, 3, core bar, 4, ratchet slot, 5, the limit rank that return to Chinese Taiwan, 6, installing hole, 7, non return part, 8, the non-return thorn, 9, ratchet, 10, sealing-plug, 11, first motive position repeatedly, 12, second motive position repeatedly, 13, ruin disconnected place, 14, needle guard.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples:

With reference to accompanying drawing, Single-Use Auto-Disable Syringes of the present invention comprises needle point 1, cylindrical shell 2, core bar 3, non return part 7, sealing-plug 10 and needle guard 14, it is provided with ratchet slot 4, limit rank 5, installing hole 6, first motive position 11, second motive position 12 and ruin disconnected place 13 (see figure 1)s repeatedly repeatedly that returns to Chinese Taiwan on core bar 3, non return part 7 is provided with non-return thorn 8 and ratchet 9, non return part 7 enters by installing hole 6 and limits the rank 5 that return to Chinese Taiwan during assembling, there is ratchet 9 to withstand and limits the rank 5 that return to Chinese Taiwan, be with sealing-plug 10 to push cylindrical shell 2 bottoms (seeing Fig. 1, Fig. 2) then.

During use, it is a small amount of that pumpback core bar 3 extracts medicinal liquids, is operated the improper bubble of bringing into and can does the aerofluxus action bubble is drained as finding to have, but notice that non return part 7 can not enter ratchet slot 4, (seeing Fig. 5, Fig. 6).Wait to drain air once more during drawing liquid, ratchet slot 4 is smoothly by ratchet 9 (see figure 3)s, aerofluxus once more before the liquid medicine injection, simultaneously before the injection since second repeatedly the length at motive position 12 places greater than the length of non return part 7, a little core bar of can pulling back, whether observe has the blood back phenomenon, if any blood back, again operating until there not being the blood back phenomenon is start injection, this moment sealing-plug 10, core bar 3 and non return part 7 travel forward together, the injection beginning, and the self-destruction performance promptly comes into force, until the injection (see figure 4) that finishes, this moment is owing to the reason core bar 3 of non-return thorn 8 and sealing-plug 10 again can not be by the straight line pumpbacks, as wants to be rotated the pumpback core bar by core bar, owing to the reason of ruining disconnected place 13 on the core bar, in case ruin the i.e. fracture in disconnected place after the core bar rotation reinforcing, reached real self-destruction performance.

Other two kinds of versions of the present invention (seeing Figure 10 and Figure 11), use principle is identical.

The size on cylindrical shell 2 heads of being assemblied in Figure 10 can match with the entry needle needle stand of international standard.

The needle stand criteria of right and wrong of Figure 11 also is to be assemblied in addition on cylindrical shell 2 heads.

Claims (2)

1, Single-Use Auto-Disable Syringes, it comprises needle point (1), cylindrical shell (2), core bar (3), non return part (7), sealing-plug (10) and needle guard (14),

It is characterized in that:

Core bar (3) is provided with ratchet slot (4), limit rank (5), installing hole (6), first motive position (11), second motive position (12) repeatedly repeatedly that returns to Chinese Taiwan;

The core bar front end is provided with ruining disconnected place (13), and bonding strength that ruining disconnected place requires reverse or can award fracture when forward rotating, to prevent carrying out the pumpback core bar in the injection back that finishes by the rotation core bar;

Non return part (7) is arranged on the core bar (3), non return part (7) is provided with non-return thorn (8) and ratchet (9), non return part during assembling (7) enters by installing hole (6) and limits the rank (5) that return to Chinese Taiwan, and is withstood by ratchet (9) and limits the rank (5) that return to Chinese Taiwan, and is with sealing-plug (10) to push cylindrical shell (2) bottom then;

During use, pumpback core bar (3) extracts partly medicinal liquid, can do the aerofluxus action drains bubble, but non return part (7) can not enter ratchet slot (4), after treating that air is got rid of fully, core bar (3) is drawing liquid once more, at this moment, ratchet slot (4) by ratchet (9), can drain air before the liquid medicine injection smoothly once more;

Second the length located of motive position (12) is greater than the length of non return part (7) repeatedly, and whether with a little core bar of can pulling back, observing has the blood back phenomenon;

Sealing-plug (10), core bar (3) and non return part (7) travel forward together, and non-return thorn (8) is used to prevent that core bar (3) and sealing-plug (10) are by the straight line pumpback.

2, Single-Use Auto-Disable Syringes according to claim 1, it is characterized in that: the ratchet slot on the described core bar (3) be one or a plurality of, simultaneously, on the core bar (3) second length dimension of motive position (12) repeatedly is longer than the length dimension 0.6mm to 2.5mm of non return part (7), first movement length how much the deciding of motive position (11) repeatedly according to the ratchet slot on the core bar (3), the ratchet slot number is done more physical exercises, and length is little, the few movement length of ratchet slot number is big, and non return part is made with steel disc.

Images