CN102218175A - Retractable needle cylinder for steel needle - Google Patents

Abstract

The invention relates to a medical appliance, in particular to a retractable needle cylinder for a steel needle. The retractable needle cylinder consists of a steel needle, a needle sleeve, a needle seat, a seat sleeve, a cylinder body, a sealing part, a core rod, a sliding clamp part and the like. The retractable needle cylinder is characterized in that the core rod is hollow; the side surface of the core rod is provided with at least one movable clamping head; the external side of the movable clamping head is provided with a sliding clamp part that can limit the external overturning of the movable clamping head; and the lower end of the sliding clamp part is provided with position-limited sidesteps. The needle cylinder is damaged immediately after being used; the repeated use of the needle cylinder is prevented; the action of pulling needle is reduced; the stabbing of the needle can be prevented; furthermore, the retractable needle cylinder has small resistance when being damaged and does not cause pain of a patient; the following four parts of the needle sleeve: the steel needle, the needle seat and the seat sleeve form an integrated replaceable needle that can be replaced; the contacting surface of the seat sleeve and the cylinder body can be made into a standard medical joint that can comply with the standard B/T 1962.1 or GB/T 1962.2; and the retractable needle cylinder extends a applicable scope, has a stable structure, can be assembled automatically, and is suitable for batch production.

Description

The steel needle retractable syringe

Technical field

The present invention relates to a kind of medical apparatus, be 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.

Summary of the invention

At the problems referred to above, the object of the invention 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, slip fastener etc., it is characterized in that described core bar hollow, its side has at least one movable chuck, the slip fastener that the restricted movable chuck in the movable chuck outside turns up, slip fastener lower end has limited step.

Described needle guard is enclosed within outside the cover for seat, cover for seat is enclosed within outside the needle stand, 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, and needle stand is positioned at cylinder lumen, inner hollow, its upper end open is communicated with draw point, its lower ending opening is communicated with cylinder lumen, needle stand bottom overhead kick can with interior plug activity overhead kick clamping, the needle stand lower end can be connected on the cylindrical shell card lobe screens step.

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.

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.

Described slip fastener is a sliding sleeve, and sliding sleeve is enclosed within the core bar outer wall and pushes down the core bar movable chuck.

Present relatively technology, the present invention has the following advantages:

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 an integral installation distribution structure sketch map of the present invention;

Fig. 2 get loose for needle stand of the present invention and the overhead kick of needle stand bottom and Nei Sai activity overhead kick in conjunction with figure;

Fig. 3 is the core bar movable chuck of the present invention figure that gets loose;

Fig. 4 turns up and steel needle retractable figure for core bar movable chuck of the present invention.

The specific embodiment

As shown in Figure 1, the steel needle retractable syringe is made up ofdraw point 1, needle guard 2, needle stand 3, cover forseat 4,cylindrical shell 5, sealingmember 6,core bar 7,interior plug 8, slidingsleeve 9 etc.Core bar 7 hollows, its side have at least onemovable chuck 71, thesliding sleeve 9 that the restrictedmovable chuck 71 inmovable chuck 71 outsides turns up, and slidingsleeve 9 lower ends havelimited step 91.

Needle guard 2 is enclosed within outside the cover forseat 4, cover forseat 4 is enclosed within outside the needle stand 3, thehead 51 of cover forseat 4 andcylindrical shell 5 can seal socket, 3 sealings of cover forseat 4 and needle stand contact and can slide relatively, and needle stand 3 is positioned atcylindrical shell 5 inner chambers, inner hollow, its upper end open 31 is communicated withdraw point 1, its lower endingopening 32 is communicated withcylindrical shells 5 inner chambers, needle standbottom overhead kick 33 can with interior plugactivity overhead kick 811 clampings, needle standlower end 34 can be connected on thecylindrical shell 5card lobes 52screens steps 521.

Cylindrical shell head 51 inner chambers extend at least twocard lobes 52, card inboard,lobe 52 upper end has thescreens step 521 of engaging needle standlower end 34,card lobe 52 lower ends have inclinedplane 522, can before push awaycore bar 7 generations the cylindrical shell axial force be converted to the cylindrical shell cross force that causescard lobe 52 to extend out.

Interior plug 8 is positioned atcore bar 7 inner chambers, its end face hasgroove 81, at least oneactivity overhead kick 811 is extended at inside rear, groove 81 sides, whenactivity overhead kick 811 combines with needle standbottom overhead kick 33,activity overhead kick 811 can extend out the minimizing adhesion, if when applying reverse active force and pulling,activity overhead kick 811 is cohesion, strengthen preventing to get loose with the clamping power of needle standbottom overhead kick 33, also can sliding relatively withcore bar 7 sealing contacts in interiorplug head side 82, is with compressedelastic wire 10 outside theinterior plug 8, andelastic wire 10 1 ends are blocked by core barjump ring step 72, the other end is blocked by interior forkclip spring step 83, andinterior plug bottom 84 is blocked bycore bar 7 cohesivemovable chucks 71.

As shown in Figure 2, along with pushing away before thecore bar 7, inplug 8 with pushing away before and applying the cylindrical shell axial force to cylinderlumen 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, causescard lobe 52 to extend out, cardlobe screens step 521 extends out thereupon, get loose with needle standlower end 34, needle standbottom overhead kick 33 simultaneously combines with interior plugactivity overhead kick 811, in conjunction with the time in plugactivity overhead kick 811 extend out with the minimizing adhesion.

As shown in Figure 3, push away beforecore bar 7 continues, thelimited step 91 of slidingsleeve 9 is stuck incylindrical shell bottom 53, and slidingsleeve 9 stops reach, and is sliding with respect tocore bar 7 backs, causes disengaging with core barmovable chuck 71, and core barmovable chuck 71 gets loose.

As shown in Figure 4, after getting loose, core barmovable chuck 71 turns up, plug 8 in getting loose, inplug 8 contract after under by the elongation effect of theelastic wire 10 of its compression, interior plugactivity overhead kick 811 because interior plugactivity overhead kick 811 has cohesion tendency, can prevent to get loose with needle standbottom overhead kick 33 during pulling by needle standbottom overhead kick 33 pulling needle stands 3, needle stand 3 is sliding withdraw point 1 relative cover forseat 4 backs, until completeretraction core bar 7 inner chambers.

Claims (5)

1. steel needle retractable syringe, form by draw point, needle guard, needle stand, cover for seat, cylindrical shell, sealing member, core bar, slip fastener etc., it is characterized in that described core bar hollow, its side has at least one movable chuck, the slip fastener that the restricted movable chuck in the movable chuck outside turns up, slip fastener lower end has limited step.

2. as claims 1 described steel needle retractable syringe, 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, and sealing contacts and can slide relatively between cover for seat and needle stand, needle stand is positioned at cylinder lumen, inner hollow, its upper end open is communicated with draw point, and its lower ending opening is communicated with cylinder lumen, the overhead kick of needle stand bottom can with interior plug activity overhead kick clamping, the needle stand lower end can be connected on the cylindrical shell card lobe screens step.

3. as the described arbitrary steel needle retractable syringe of claims 1-2, 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.

4. as the described arbitrary steel needle retractable syringe of claims 1-3, 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.

5. as the described arbitrary steel needle retractable syringe of claims 1-4, it is characterized in that described slip fastener is a sliding sleeve, sliding sleeve is enclosed within the core bar outer wall and pushes down the core bar movable chuck.

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