CN201921240U

CN201921240U - Needle retraction syringe

Info

Publication number: CN201921240U
Application number: CN2010201635945U
Authority: CN
Inventors: 李华美
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-14
Filing date: 2010-04-14
Publication date: 2011-08-10
Anticipated expiration: 2020-04-14

Abstract

The utility model relates to a medical instrument, more specifically to a needle retraction syringe which comprises a needle, a needle cover, a needle seat, a seat cover, a cylindrical body, a sealing member and a core rod, wherein the needle cover sleeves over the seat cover which sleeves over the needle seat, the heads of seat cover and the cylindrical body are jointed in sealing manner, the seat cover and the needle seat are in sealed contact and are slidable relative to each other, the needle seat is situated in the inner cavity of the cylindrical body, the lower end of the needle seat is clamped in a clamping step in the inner cavity of the head of the cylindrical body, the needle seat is hollow, an upper opening of the needle seat is communicated with the needle, and the lower opening of the needle seat is communicated with the inner cavity of the cylindrical body. The syringe is damaged after being used, which prevents reuse of the syringe. Drawing needle is not required, and the syringe can prevent a user from being stabbed by the needle. The resistance force is small during destroying of the syringe, which may not cause pain to a patient. The needle cover, the needle, the needle seat and the seat cover form an integrated disposable needle which is replaceable. The contact surface between the seat cover and the cylindrical body is made into a medical joint meeting the standards of GB/T1962.1 or GB/T1962.1, and the application scope is expanded. The needle retraction syringe is stable in structure and suitable for mass production, and can be assembled automatically.

Description

The steel needle retractable syringe

Technical field

This utility model relates to a kind of medical apparatus, is specially the steel needle retractable syringe.

Background technology

Syringe is a kind of medical apparatus commonly used, is used for pumping liquid and injection, and the widely used syringe of medical institutions all adopts single to use at present.Yet, the syringe that this " single " in theory uses still exists to be exposed by draw point in reusable danger of lawless person and the offal treatment process stabs the cross infection hidden danger that human body causes, the single that exists on the domestic market uses syringe because its structure and technical scheme exist not enough, can not guarantee not have the enforcement of cross infection injection, and the damage that medical personnel obviously cause more than other accidents because of the needle stick injuries of using common syringe and causing, the cross infection of pathogenic bacteria inevitably can occur, bring serious threat for medical personnel's health of human body.

U.S.'s disease prevention and the whole world acquired immune deficiency syndrome (AIDS) project China director Ye Lei of control centre point out that the best approach that solves dangerous injection is to use single to use the tube of having an injection that unmakes.The requirement and the definition of the harmless injection of WHO (World Health Organization (WHO)) proposition in 1994: harmless to the receiver, harmless to user, harmless to environment and other people.

The utility model content

At the problems referred to above, this utility model purpose is to provide a kind of steel needle retractable syringe, to solve present problem.

For achieving the above object, be achieved through the following technical solutions:

The steel needle retractable syringe, form by draw point, needle guard, needle stand, cover for seat, cylindrical shell, sealing member, core bar etc., it is characterized in that described needle guard is enclosed within outside the cover for seat, cover for seat is enclosed within outside the needle stand, and the head of cover for seat and cylindrical shell can seal socket, sealing contacts and can slide relatively between cover for seat and needle stand, needle stand is positioned at cylinder lumen, and its lower end can be connected on the cylindrical shell head cavity screens step, needle stand hollow, its upper end open is communicated with draw point, and lower ending opening is communicated with cylinder lumen.

Described cover for seat is made of fixed cover and sealing ring, and needle guard is enclosed within outside the fixed cover, and fixed cover is enclosed within sealing ring and seals contact outward and with it, and sealing ring is enclosed within outside the needle stand, contacts also and can relatively move with the needle stand sealing, and fixed cover and cylindrical shell head can seal socket.

Described needle stand bottom has overhead kick, can with interior plug activity overhead kick clamping.

Described cylindrical shell head cavity extends at least two card lobes, the inboard screens step in card lobe upper end with engaging needle stand, card lobe lower end has the inclined plane, can before push away the core bar generation the cylindrical shell axial force be converted to the cylindrical shell cross force that causes the card lobe to extend out.

Described core bar hollow, its head overcoat sealing member, inner chamber is plugged with interior plug, the side has at least one movable chuck, movable chuck overcoat sliding sleeve, and the advancing slip cover of self-destruction is pushed down movable chuck, movable chuck is cohesion, its screens step can block interior plug, the sliding sleeve slides downwards movable chuck that gets loose when ruining type, and movable chuck and screens step thereof turn up and then get loose interior plug.

Described sliding sleeve lower end has limited step, can be connected to the cylindrical shell bottom, and limited step is stuck in the cylindrical shell bottom when ruining type, and sliding sleeve stops reach, with respect to sliding behind the core bar, causes disengaging with the core bar movable chuck.

Plug is positioned at the core bar inner chamber in described, its end face has groove, groove side extends at least one activity overhead kick towards interior rear, when the activity overhead kick combines with needle stand bottom overhead kick, the activity overhead kick can extend out the minimizing adhesion, if when applying reverse active force and pulling, the activity overhead kick is cohesion, strengthen preventing to get loose with the clamping power of needle stand bottom overhead kick, interior plug head side and core bar sealing contact also can be slided relatively, interiorly is with compressed elastic wire beyond the Great Wall, and elastic wire one end is blocked by core bar jump ring step, the other end is blocked by interior fork clip spring step, and interior plug bottom is blocked by the cohesive movable chuck of core bar.

Present relatively technology the utlity model has following advantage:

1, syringe uses up destroyedly, prevents to reuse.

2, draw point bounces back automatically, has not only reduced and has pulled out the pin action, also prevents pricking wound.

Resistance is little when 3, ruining type, does not cause patient's misery.

4, needle guard, draw point, needle stand and 4 parts of cover for seat constitute the interchangeable pin of one, and are replaceable.

5, the contact surface of cover for seat and cylindrical shell all can be made the standard medical connector that meets GB/T 1962.1 or GB/T 1962.2, has enlarged its scope of application.

6, Stability Analysis of Structures can be assembled automatically, is fit to volume production.

Description of drawings

Fig. 1 is this utility model integral installation distribution structure sketch map;

Fig. 2 is the interchangeable needle construction sketch map of this utility model one;

Fig. 3 get loose for this utility model needle stand and the overhead kick of needle stand bottom and Nei Sai activity overhead kick in conjunction with figure;

Fig. 4 is this utility model core bar movable chuck figure that gets loose;

Fig. 5 turns up and steel needle retractable figure for this utility model core bar movable chuck.

The specific embodiment

As shown in Figure 1, the steel needle retractable syringe is made up of draw point 1, needle guard 2, needle stand 3, cover for seat 4, cylindrical shell 5, sealing member 6, core bar 7 etc.Needle guard 2 is enclosed within outside the fixed cover 41 of cover for seat 4, fixed cover 41 is enclosed within the sealing ring 42 outer and sealing contacts with it of cover for seat 4, sealing ring 42 is enclosed within outside the needle stand 3, contacts also and can relatively move with needle stand 3 sealings, and fixed cover 41 can seal socket with the head 51 of cylindrical shell 5; Needle stand 3 is positioned at cylindrical shell 5 inner chambers, needle stand 3 hollows, and its upper end open 31 is communicated with draw point 1, and lower ending opening 32 is communicated with cylindrical shell 5 inner chambers.

The overhead kick 33 of needle stand bottom, can with interior plug activity overhead kick 811 clampings.

Cylindrical shell 5 head cavities extend at least two card lobes 52, and card inboard, lobe 52 upper end has the screens step 521 of engaging needle stand lower end 34, and card lobe 52 lower ends have inclined plane 522.

Plug 8 in core bar 7 hollows, its head overcoat sealing member 6, inner chamber are plugged with, the side has at least one movable chuck 71, plug 8 in movable chuck 71 overcoat sliding sleeves 9, movable chuck 71 block.

Sliding sleeve 9 lower ends have limited step 91, can be connected to cylindrical shell bottom 53.

Interior plug 8 is positioned at core bar 7 inner chambers, its end face has groove 81, at least one activity overhead kick 811 is extended at inside rear, groove 81 sides, also can slide relatively with core bar 7 sealing contacts in interior plug head side 82, be with compressed elastic wire 10 outside the interior plug 8, elastic wire 10 1 ends are blocked by core bar jump ring step 72, and the other end is blocked by interior fork clip spring step 83, and interior plug bottom 84 is blocked by core bar 7 cohesive movable chucks 71.

As shown in Figure 2, needle guard 2, draw point 1, needle stand 3 and 4 four parts of cover for seat constitute the interchangeable pin of one, and wherein cover for seat 4 comprises fixed cover 41 and sealing ring 42.

As shown in Figure 3, along with pushing away before the core bar 7, in plug 8 with pushing away before and applying the cylindrical shell axial force to cylinder lumen card lobe 52, under 522 effects of card inclined plane, lobe 52 lower end, the cylindrical shell axial force transfers the cylindrical shell cross force to, causes card lobe 52 to extend out, and card lobe screens step 521 extends out thereupon and gets loose with needle stand lower end 34, needle stand bottom overhead kick 33 simultaneously combines with interior plug activity overhead kick 811, in conjunction with the time in plug activity overhead kick 811 extend out with the minimizing adhesion.

As shown in Figure 4, push away before core bar 7 continues, the limited step 91 of sliding sleeve 9 is stuck in cylindrical shell bottom 53, and sliding sleeve 9 stops reach, and is sliding with respect to core bar 7 backs, causes disengaging with core bar movable chuck 71, and core bar movable chuck 71 gets loose.

As shown in Figure 5, after getting loose, core bar movable chuck 71 turns up, plug 8 in getting loose, in plug 8 contract after under by the elongation effect of the elastic wire 10 of its compression, interior plug activity overhead kick 811 because interior plug activity overhead kick 811 has cohesion tendency, can prevent to get loose with needle stand bottom overhead kick 33 during pulling by needle stand bottom overhead kick 33 pulling needle stands 3, needle stand 3 is sliding with draw point 1 relative cover for seat 4 backs, until complete retraction core bar 7 inner chambers.

Claims

1. steel needle retractable syringe, form by draw point, needle guard, needle stand, cover for seat, cylindrical shell, sealing member, core bar etc., it is characterized in that described needle guard is enclosed within outside the cover for seat, cover for seat is enclosed within outside the needle stand, and the head of cover for seat and cylindrical shell can seal socket, sealing contacts and can slide relatively between cover for seat and needle stand, needle stand is positioned at cylinder lumen, and its lower end can be connected on the cylindrical shell head cavity screens step, needle stand hollow, its upper end open is communicated with draw point, and lower ending opening is communicated with cylinder lumen.

2. as claims 1 described steel needle retractable syringe, it is characterized in that described cover for seat is made of fixed cover and sealing ring, needle guard is enclosed within outside the fixed cover, fixed cover is enclosed within the outer and sealing contact with it of sealing ring, sealing ring is enclosed within outside the needle stand, contact also and can relatively move with the needle stand sealing, fixed cover and cylindrical shell head can seal socket.

3. as claims 1 or 2 described steel needle retractable syringes, it is characterized in that described needle stand bottom has overhead kick, can with interior plug activity overhead kick clamping.

4. as claims 1 described steel needle retractable syringe, it is characterized in that described cylindrical shell head cavity extends at least two card lobes, the inboard screens step in card lobe upper end with engaging needle stand, card lobe lower end has the inclined plane, can before push away the core bar generation the cylindrical shell axial force be converted to the cylindrical shell cross force that causes the card lobe to extend out.

5. as claims 1 described steel needle retractable syringe, it is characterized in that described core bar hollow, its head overcoat sealing member, inner chamber is plugged with interior plug, and the side has at least one movable chuck, movable chuck overcoat sliding sleeve, the advancing slip cover of self-destruction is pushed down movable chuck, and movable chuck is cohesion, and its screens step can block interior plug, the sliding sleeve slides downwards movable chuck that gets loose when ruining type, movable chuck and screens step thereof turn up and then get loose interior plug.

6. as claims 5 described steel needle retractable syringes, it is characterized in that described sliding sleeve lower end has limited step, can be connected to the cylindrical shell bottom, limited step is stuck in the cylindrical shell bottom when ruining type, sliding sleeve stops reach, with respect to sliding behind the core bar, causes disengaging with the core bar movable chuck.

7. as claims 5 or 6 described arbitrary steel needle retractable syringes, it is characterized in that described interior plug is positioned at the core bar inner chamber, its end face has groove, groove side extends at least one activity overhead kick towards interior rear, when the activity overhead kick combines with needle stand bottom overhead kick, the activity overhead kick can extend out the minimizing adhesion, if when applying reverse active force and pulling, the activity overhead kick is cohesion, strengthen preventing to get loose with the clamping power of needle stand bottom overhead kick, also can slide relatively with core bar sealing contact in interior plug head side, in be with compressed elastic wire beyond the Great Wall, elastic wire one end is blocked by core bar jump ring step, and the other end is blocked by interior fork clip spring step, and interior plug bottom is blocked by the cohesive movable chuck of core bar.