CN2936285Y

CN2936285Y - Retractable needle safety injector

Info

Publication number: CN2936285Y
Application number: CN 200620119340
Authority: CN
Inventors: 吴渭水
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-29
Filing date: 2006-08-29
Publication date: 2007-08-22
Anticipated expiration: 2016-08-29

Abstract

The utility model relates to a safe syringe with retractable pinhead, which comprises a pusher, a coupling sleeve, an injection syringe, a needle supporter and a pinhead cover. A coupling sleeve is positioned in the front part of the pusher for telescoped joint of the needle supporter. When the injection of the pharmaceutical product is finished, extraction of the pusher can result in the withdrawal of the needle supporter together with the sharp pinhead to be completely hided within the injection syringe, and the body of the pusher can be broken. The pinhead cover is then inversely inserted into the port of the injection syringe to prevent the pinhead from projecting, thus making the syringe safe with retractable pinhead which can prevent the dumped syringe from hurting other people.

Description

But the safety injector of retractable needles

Technical field

But this utility model discloses a kind of safety injector of retractable needles, is meant a kind ofly after finishing using especially, and its needle stand and used syringe needle contract in can be fully and be concealed in safety injector in the injection tube.

Background technology

The use of injection device and needle safety, not only to patient, to the medical worker, to environment with the public's safety is all had positive help, links such as apparatus processing after it not only relates to injection device and injects, more can reduce and reuse disposable syringe device or reduce to use continuously and share syringe needle, needle tubing or injection tube, or non-safety injection behavior such as technical operation is incorrect; The Biohazard Waste that is produced is more collected by some medical and health organization, especially according to classification, Biohazard Waste is positioned over respectively in antiseep, specialized package thing that anti-sharp device penetrates or the airtight container.

Commonly use injection device such as U. S. application the 60/282nd, No. 765 patents, its main composition is characterized as: a kind of injection device that is used in the human body body injection liquid state or solid-state drug, this injection device comprises: one is provided with near-end and long-range hollow shell, shown in shell hold liquid state or solid-state drug; One hollow pinhead, shown in syringe needle be installed in the long-range of shell and longitudinal extension in described shell; One comprises a near-end and a long-range plunger, and described plunger can slide in the shell near-end; And one with the long-range hollow sleeve that is connected slidably of shell, this hollow sleeve can cover the syringe needle before the injection, and during injecting in the retraction shell.

As the U.S. the 5th, 531,694,5,632,733,6,206, No. 857 patents, it is all emphasizing injection device after drug injection finishes, sleeve can stretch out from shell and cover syringe needle, or needle retractable enters injection device inside, with the safety design after reaching syringe needle and using.

Some shortcomings when this utility model people combines with injection device in view of its syringe needle of above-mentioned injection device are improved, so that another kind of safety injector to be provided again.

The utility model content

But the purpose of this utility model promptly is to provide a kind of safety injector of retractable needles, is provided with two threads at injection tube one end, when can be after injection finishes syringe needle being pulled out skin, guarantees can not allow syringe needle come off and also be inserted on one's body the human body.

This utility model time purpose is to provide a kind of after finishing using, and needle stand and syringe needle can be placed in the inside of injection tube fully, but needle cover and can be inserted in and prevent in the injection tube that needle point from protruding out the safety injector of the retractable needles that is exposed to the injection tube outside.

Another purpose of the present utility model is to provide a kind of push rod can being fractureed with cervical region after finishing using to separate, but significantly to reduce the safety injector of the retractable needles of the length of discarding syringe.

But the safety injector of retractable needles of the present utility model includes:

One push rod is provided with card hinder bulge loop, the stop ring of top projection, the collar, pushing tow section, oblique cone shape, the scrobicular ring that fractures, the push rod body of rod and a push pedal in regular turn;

One adapter sleeve, in have top projection, the collar and the pushing tow section place that mesopore and taper hole just can be placed on push rod, adapter sleeve is established top cover section, class's section and adapter section outward respectively, is provided with several fins in addition on this top cover section one-tenth taper and the adapter section;

One injection tube has one and can supply the ccontaining pipe space of medicament, and the spatial top of this pipe is brought together and formed a butting section, and this bottom, pipe space inner loop is provided with a ring protuberance, ringent conical section, and the outside, bottom has plate body and pulls and supports operation for finger; And the inner convergent in this butting section is the hollow form of a cone, from bottom to top be formed with a location bulge loop, fin in regular turn, go up bulge loop and screw in section, this butting section just can for adapter sleeve by push rod is whole shift the butting section onto after, utilize positioning convex ring and go up the restriction of bulge loop and location really;

One needle stand, interior tool taper hole, on syringe needle is arranged, down locating flange is arranged, corresponding concave arc section is arranged on this locating flange;

One needle cover has hollow hole for covering this syringe needle.

But adopt the safety injector of the retractable needles of above design, wherein push rod sinciput cover section is established adapter sleeve for the grafting needle stand, drawing goes out push rod when drug injection is finished, needle stand can be pulled back together with sharp keen syringe needle and be concealed in the injection tube fully and the push rod body of rod that the push rod that fractures exposes, again needle cover is oppositely inserted in the injection tube port and prevent that syringe needle from exposing, but become the safety injector of the retractable needles that a kind of syringe that can avoid other people to go out of use stabs.After finishing using, needle stand and syringe needle can be placed in the inside of injection tube fully, and needle cover and can being inserted in prevents in the injection tube that needle point from protruding out and is exposed to the injection tube outside; And push rod can be fractureed with cervical region after finishing using and separate, significantly to reduce the length of discarded syringe.

Description of drawings

But Fig. 1 is the perspective exploded view of safety injector of the retractable needles of this utility model tool needle stand;

Fig. 2 is this utility model cut-away section decomposing schematic representation;

Fig. 3 is that adapter sleeve of the present utility model combines sketch map with push rod;

Fig. 4 is that adapter sleeve of the present utility model combines generalized section () with push rod;

Fig. 5 is that adapter sleeve of the present utility model combines generalized section (two) with push rod;

Fig. 6 inserts the action sketch map of injection tube for needle stand of the present utility model;

Fig. 7 inserts the action sketch map of injection tube for the needle stand of another embodiment;

Fig. 8 desires to insert the sketch map of injection tube for the needle stand of another embodiment;

Fig. 9 inserts the sketch map of injection tube for the needle stand of another embodiment;

Figure 10 is the locking action sketch map after needle stand of the present utility model is inserted injection tube;

Figure 11 is the locking generalized section after needle stand of the present utility model is inserted injection tube;

Figure 12 is the screw-in section generalized section of injection tube of the present utility model;

Figure 13 is an adapter sleeve generalized section of the present utility model;

Figure 14 is the sketch map that push rod of the present utility model and needle stand break away from fully;

Figure 15 is for pulling out injection tube and the push rod isolating sketch map that fractures from the scrobicular ring place that fractures behind the push rod of the present utility model.

The specific embodiment

See also Fig. 1, be perspective exploded view of the present utility model, but the safety injector of retractable needles of the present utility model is to be formed by combining by push rod 1, adapter sleeve 2, injection tube 3, needle stand 4 and needle cover 5.

As shown in Figures 1 and 2, this push rod 1 is provided with top projection 11, the collar 12, pushing tow section 13, card hinder bulge loop 14, stop ring 15, the scrobicular ring 16 that fractures, the push rod body of rod 17 and a push pedal 18 from top to bottom in regular turn.This card hinder bulge loop 14 and stop ring 15 are all established contraction oblique cone upwards.

Have mesopore 21 and taper hole 22 in this adapter sleeve 2 and just can be placed on top projection 11, the collar 12 and pushing tow section 13 places of push rod 1, these taper hole 22 bottoms have the recessed edge 221 of clip just can with card hinder bulge loop 14 mutually combine fixing (see also Fig. 3 to shown in Figure 5), these taper hole 22 its bottoms are shaped as one and are and major axis and minor axis are arranged and be similar to oval form, and these taper hole 22 its bottoms around length overall less than the card hinder bulge loop 14 of push rod 1 enclose around length overall, recessed edge 221 of clip and card hinder bulge loop 14 can be connected airtight really mutually combine fixedly difficult drop-off; Adapter sleeve 2 outer top cover section 23, class's section 24 and the adapter sections 25 established respectively, this

top cover section

23 and 24 one-tenth tapers of this class's section, and be provided with most fins 26 on the adapter section 25 in addition, wherein at least two fins 26 relative to each other angle less than injection tube 3 its two fins 34 relative angle.

This injection tube 3, it has one can supply the ccontaining pipe space 31 of medicament, the top in this pipe space 31 is brought together and is formed a butting section 32, its pipe space 31 bottom inner loop are provided with a ring protuberance 37, ringent conical section 38, the outside, bottom has plate body 39 and pulls and supports operation for finger, and this plate body 39 can be discoideus or corresponding plate body; After the stop ring 15 that ringent conical section 38 is beneficial to push rod 1 is inserted, utilize the ring protuberance 37 of step shape to give and block anti-throw-out lever 1 whole being drawn out.

And these butting section 32 inner convergents are the hollow form of a cone, from bottom to top be formed with a location bulge loop 33, fin 34 in regular turn, go up bulge loop 35 and screw in section 36, wherein these fin 34 equal angles are according to the fixed angle setting, and this screw-in section 36 can be single thread or plural screw thread; See also shown in Figure 6, this butting section 32 just can for adapter sleeve 2 by push rod 1 is whole shift butting section 32 onto after, utilize positioning convex ring 33 to reach upward restriction and certain location of

bulge loop

35,2 class's section 24 complete upper limb inside of being close to bulge loop 35 of localized while adapter sleeve with taper, so that 2 of push rod 1 and adapter sleeves are formed with confined space, can give needle stand 4 with screwing in and combine from screwing in section 36 this moment, because of commonly using injection tube 3 as separating with adapter sleeve 2, then adapter sleeve 2 needs in class's section 24 places cyclic water proof rubber to be set, to reach the waterproof effect, class's section 24 of its adapter sleeve 2 of this utility model then need not install water proof rubber additional, only adopt class's section 24 with the driving fit of cone shape ring-type outer wall in injection tube 3 inside, but the use of like this then simplified assembly and assembling man-hour.

Please consult Fig. 1 and Fig. 6 again, this needle stand 4, interior tool taper hole 41, on syringe needle 42 is arranged, under locating flange 43 is arranged, this locating flange 43 can give and screw in from screwing in section 36 smoothly with this, be inserted in combine closely (as shown in figure 10) mutually with the top cover section 23 of adapter sleeve 2 again, and locating flange 43 is positioned under the screw-in section 36 just and is limited and screw-in section 36 places disengaging certainly, make the needle stand 4 that contains syringe needle 42 be combined into one group with injection tube 3, injection finishes when syringe needle 42 pulled out skin, guarantees can not allow syringe needle 42 come off and also be inserted on one's body the human body.

Other sees also Fig. 7 to Fig. 9, injection tube 3 its butting section 32 inner convergents of the present utility model are the hollow form of a cone, it also can only be formed with a location bulge loop 33, fin 34, go up bulge loop 35, screw in section 36 and need not be provided with, directly needle stand 4 is inserted the top cover section 23 of adapter sleeve 2 for user, to simplify user of service's operation.

See also Figure 11 to shown in Figure 13, when adapter sleeve 2 by push rod 1 behind the whole butting section 32 of shifting injection tube 3 onto, the fin 34 of butting section 32 just with adapter sleeve 2 in fin 26 corresponding restriction clips locate, adapter sleeve 2 can not spinned, the screw-in that is beneficial to needle stand 4 is operated.

As Fig. 1 to shown in Figure 6, this needle cover 5 for circular cone form with hollow hole 51 for the usefulness that covers this syringe needle 42, and the outer rim of this needle cover 5 is equipped with several fins 52, and this needle cover 5 can become form that top and bottom ends communicates or the form that only has an opening.

See also Fig. 6, Figure 10 and shown in Figure 14, after this adapter sleeve 2 is placed on the push rod 1, by the push rod 1 whole location, 32 back, butting section of shifting injection tube 3 onto, the screw-in section 36 of needle stand 4 on butting section 32 that is equipped with needle cover 5 can be screwed in, the needle stand 4 and top cover section 23 sockets of adapter sleeve 2 are fixed, can extract this needle cover 5, on one's body syringe needle 42 injection medicine bottles or human body, beginning is slowly pulled back push rod 1 to carry out medical care precesses (seeing also shown in Figure 14) such as dosing or blood drawing.

See also shown in Figure 14, this moment, pipe space 31 was if make and be full of required medicament, utilized syringe needle 42 to inject on one's body the human bodies, and beginning slowly will push away before the push rod 1 medical care precess such as to inject, beaten up to medicament, adapter sleeve 2 is inserted combination by the pushing tow section 13 of push rod 1 again.This moment with needle cover 5 once more with syringe needle 42 whole entangling, push rod 1 can be pulled outward and utilize needle cover 5 to press down simultaneously together with syringe needle 42 whole pushing within the injection tube 3, pull out needle cover 5 again and oppositely this needle cover 5 is inserted within the injection tube 3 from butting section 32, and will convexedly stretch in the push rod body of rod 17 outside the injection tube 3 from the scrobicular ring 16 that fractures give and fracture (seeing also shown in Figure 15).

Claims

1. but the safety injector of a retractable needles is characterized in that, comprising:

One push rod, it is provided with card hinder bulge loop, the push rod body of rod and a push pedal of top projection, the collar, pushing tow section, oblique cone shape in regular turn;

One adapter sleeve, in have the mesopore and the taper hole at the top projection, the collar and the pushing tow section place that just are placed on push rod, adapter sleeve is established top cover section, class's section and adapter section outward respectively, is provided with several fins in addition on this top cover section one-tenth taper and the class's section;

One injection tube has one and can supply the ccontaining pipe space of medicament, and a butting section of bringing shape together is established on the spatial top of this pipe, and this inside, butting section is the hollow form of a cone, from bottom to top is provided with a location bulge loop, fin in regular turn and goes up bulge loop.

But 2. by the safety injector of the described retractable needles of claim 1, it is characterized in that, wherein more comprise a needle stand, interior tool taper hole, on syringe needle is arranged, down locating flange is arranged, corresponding concave arc section is arranged on this locating flange.

3. but by the safety injector of the described retractable needles of claim 1, it is characterized in that, wherein more comprise a needle cover, described syringe needle is stamped for the hollow hole that covers this syringe needle.

4. but by the safety injector of the described retractable needles of claim 1, it is characterized in that wherein this inside, bottom, pipe space more is equipped with a ring protuberance, ringent conical section, the outside, bottom has the finger of confession and pulls and supports the operation plate body.

5. but by the safety injector of the described retractable needles of claim 1, it is characterized in that wherein this push rod more includes stop ring and fractures scrobicular ring.

But 6. by the safety injector of the described retractable needles of claim 1, it is characterized in that, wherein the taper hole bottom of this adapter sleeve have just can with the card hinder bulge loop recessed edge of fixed clip that mutually combines.

7. but press the safety injector of the described retractable needles of claim 6, it is characterized in that, wherein the recessed edge of the clip of the taper hole of this adapter sleeve is has major axis and minor axis and is similar to oval-shaped form, and the recessed edge of this clip around length overall less than the card hinder bulge loop of push rod around length overall.

8. but by the safety injector of the described retractable needles of claim 1, it is characterized in that wherein this injection tube more includes and screws in section.

9. but by the safety injector of the described retractable needles of claim 8, it is characterized in that wherein this injection tube screws in section and establishes plural screw thread.

10. but by the safety injector of the described retractable needles of claim 1, it is characterized in that wherein the outer rim of this needle cover is equipped with several fins, and this needle cover becomes form that top and bottom ends communicates or the form that only has an opening.

11. but, it is characterized in that wherein this needle cover becomes the hollow hole that top and bottom ends communicates press the safety injector of the described retractable needles of claim 3.

12. but, it is characterized in that wherein this needle cover becomes to have the hollow hole of an opening press the safety injector of the described retractable needles of claim 3.

But 13. by the safety injector of the described retractable needles of claim 10, it is characterized in that, wherein on the adapter sleeve between any two fins relative angle, less than any two fins on the injection tube relative angle.