CN103285453A

CN103285453A - Needle isolation type disposable syringe

Info

Publication number: CN103285453A
Application number: CN2013102233656A
Authority: CN
Inventors: 倪伟清
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-05
Filing date: 2013-06-05
Publication date: 2013-09-11
Anticipated expiration: 2033-06-05
Also published as: CN103285453B

Abstract

The invention discloses a needle isolation type disposable syringe which comprises a push rod and a piston, an injection needle cylinder with movable track grooves (hereinafter referred to as the needle cylinder), a needle cylinder inner sleeve with threads (hereinafter referred to as the inner sleeve) and a needle cylinder outer sleeve with a metal protective elastic sheet (hereinafter referred to as the outer sleeve). Before injection, an injection needle (in common use) is fixed on the inner sleeve and the needle cylinder in a spiral mode, so that the leakage between the needle cylinder and the injection needle is improved, and the effect that the injection needle is prevented from being dropped in improved. After the injection, the outer sleeve moves along the moving tracks of 7-shaped grooves in the needle cylinder, namely, the outer sleeve is rotated towards the right relative to the needle cylinder and is pushed toward the front end, and when the injection needle is completely sleeved into the outer sleeve, the metal elastic sheet in a round hole in the front end of the outer sleeve is automatically opened flipped open from an original folding and compressing state to shield the round hole. During the process that the outer sleeve is continuously pushed, the inner sleeve is driven to come off outwards, the inner sleeve and the injection needle are come off at the same time due to the fact that the inner sleeve and the injection needle are fixed, the injection needle is sealed between the inner sleeve and the outer sleeve, wherein the inner sleeve and the outer sleeve are separated, and therefore that the purpose that the medical staff are prevented from being punched by needles is achieved.

Description

The isolated disposable syringe of syringe needle

Affiliated technical field

The present invention relates to a kind of disposable syringe, particularly a kind of syringe of isolating and separating entry needle.

Background technology

At present, pricking wound is the most common a kind of occupational injury in the curative activity in the clinical position, and the skin that needle point punctures medical personnel arrives deep tissue, so that the risk of viruses such as infecting hepatitis B, AIDS is undertaken by wounded body.Find in " clinical nurse acupuncture injures the reason summary of the low report of pricking wound phenomenon " literary composition according to people such as the 44th volume the 2nd interim easily suitable virtue " Chinese nursing magazine " in February, 2009: domestic year pricking wound 3.5 times per capita, wherein contaminated syringe needle accounts for 60%.In the master thesis of Beijing Union Medical College Nie Shengxiao in 2012, pricking wound took place in 60.5% nurse in three grades of general hospitaies in Beijing 1 year, and this research does not also comprise the outer medical worker of nurse just.As seen the problem of pricking wound is badly in need of solving.The descriptive statistics analysis result of the medical personnels'sharp injuries kind that scholars such as Wu Yinghong report 124 two of Beijing areas, tertiary hospitals in " Beijing area medical personnels'sharp injuries present situation and countermeasure " draws syringe needle and stabs to causing the conclusion of the highest apparatus kind of injury from sharp utensil evil rate, its constituent ratio is 33.8%, in all medical apparatus injuries, account for 1/3rd, its paper was delivered in " Chinese hospital infection magazine " 2012 the 22nd the 7th phases of volume, as seen the importance to preventing that pricking wound from taking place in the clinical position is especially to the safety problem of entry needle.

At present, usually the solution for the anti-acupuncture of entry needle is that needle tip is designed, for pin stalk portion, afterbody, and the thinking of entry needle and syringe Integration Design and innovation and few, to such an extent as to the degree-of-difficulty factor of entry needle manufacturing process improves and increases greatly cost.For used disposable syringe, the injection needles of the especially contacted body fluid that is infectious should be isolated fully, and will reach effective, quick, easy purpose.

Summary of the invention

Can not isolate entry needle fully to prevent the generation of pricking wound in order to overcome existing disposable syringe, the invention provides a kind of disposable syringe (syringe), this disposable syringe only needs to carry out improvement design at syringe cylinder just can reach safety isolation to entry needle, and more effective, quick, simple and easy.

The technical solution adopted for the present invention to solve the technical problems is: the one group of inside and outside cover of injection needles drum outer wall design that is generally using clinically at present.After injection finishes, promote overcoat, entry needle can be inserted in the overcoat; When overcoat continued promotion forward, interior cover was driven by overcoat, and interior cover props up entry needle bottom and outside mobile its separation syringe that makes; In the process of Tui Donging, when the overcoat front end surpassed the injection needle point, the metal monolithic of overcoat front end automatically springed open, and blocks outlet forward, broke through to prevent entry needle.The entry needle bottom can't be deviate from from interior cover front end.Inside and outside cover is enclosed in entry needle wherein, reaches safety and isolates entry needle to prevent the effect of pricking wound and body fluid communication risk of infection.The present invention is a kind of disposable syringe (syringe), comprising: the interior syringe overcoat (hereinafter to be referred as overcoat) that overlaps (hereinafter to be referred as interior cover) and have the metal coating shell fragment of the syringe that push rod and piston, the syringe cylinder (hereinafter to be referred as syringe) that has the event trace groove, inwall have screw thread.Before the injection, entry needle (general) is fixed in the syringe front end in a spiral manner, and entry needle afterbody ledge and interior cover inner thread agree with and screw, and has increased the sealing between syringe and entry needle and has prevented the effect that entry needle comes off; This moment, entry needle and interior cover were integral.After injection finishes, along " 7 font " the groove event trace on the syringe, being overcoat promotes overcoat with respect to syringe forward end after the right rotation, when overcoat is inserted in inside with entry needle fully, metal clips in the overcoat front end circular hole automatically springs open from the state of original folding compression, to cover circular hole.Continue to promote in the process of overcoat, cover is outwards deviate from driving, and interior cover and entry needle are deviate from simultaneously because of screw fixed, and entry needle is closed in the isolated inside and outside cover (protection combination cover), reaches the purpose that prevents acupuncture.

Wherein, have the syringe cylinder (abbreviation syringe) of event trace groove, it is characterized in that: there is the umbilicate type groove of two opposing vertical dog-leg paths (" 7 " font) on the syringe cylinder surface; Be used for carrying out chimeric on the movement locus with interior cover and the inside ledge of overcoat.Track perpendicular to syringe overlaps and overcoat in order in fixing, makes it be difficult for outwards deviating from, and the track that is parallel to syringe then is the active path that interior cover and overcoat are deviate from.

Inwall has the interior cover of syringe (cover in being called for short) of screw thread, it is characterized in that: be between overcoat and the syringe, can closely entangle the syringe front end; The relative inside ledge in interior cover tail end two places is embedded in the needle cylinder surface groove, can slide by dog-leg path; In cover leading portion circular open inwall be helicitic texture, with in a spiral manner fixedly entry needle in syringe, the effect that has increased sealing and prevented from coming off.At this moment, entry needle and interior cover screw fixed are an assembly, and entry needle tightly is placed in syringe front end ledge.

Syringe overcoat (abbreviation overcoat) with metal coating shell fragment, it is characterized in that: fully around interior cover and syringe barrel portion, the relative inside ledge in overcoat tail end two places is little square, and is embedded in the needle cylinder surface groove, can slide by dog-leg path; Leading portion circular open energy and only can make that entry needle is parallel to be passed through; Have sidewall that the folded metal monolithic is arranged in the opening, after overcoat left initial position, original folded metal shell fragment can launch up to blocking the overcoat front opening fully automatically.

Entry needle is the injection needles that generally uses (general) at present clinically, no particular design.Syringe inner carrier and push rod are the present push rod of disposable syringe clinically, no particular design.

The invention has the beneficial effects as follows, can reach safety and isolate entry needle to prevent the effect of pricking wound and body fluid communication risk of infection, easy and simple to handle, quick, safe and effective, simple structure.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.In order more clearly to show syringe construction, the piston of syringe and push rod do not draw in the accompanying drawing.

Fig. 1 is the isolated disposable syringe profile of syringe needle.

Fig. 2 is that overcoat outwards overlaps the profile that moves with entry needle in mobile the drive along track.

Fig. 3 is that interior cover, overcoat comprise entry needle separation profile.

Fig. 4 is overcoat when moving forward, cover compressing in the front end shell fragment leaves and automatically rebounding open three-view diagram.

Fig. 5 is the three-view diagram that overcoat front end shell fragment launches fully and blocks the front end circular hole fully and separate with syringe.

Fig. 6 is the three-view diagram of the syringe cylinder (syringe) that has the event trace groove; The syringe outer surface has 2 vertical fold line grooves.

Fig. 7 is the three-view diagram with syringe overcoat (overcoat) of metal coating shell fragment; Overcoat front end aperture is other to have metal clips (folded state), afterbody inwall that the little square of 2 place's inwardly protrudings is arranged.

Fig. 8 is the three-view diagram that inwall has the interior cover of syringe (interior cover) of screw thread; The central aperture inwall is helicitic texture, and interior cover inwall has 2 place's inwardly protruding cuboids; The lower right corner is three-dimensional view.

Fig. 9 is the three-view diagram of the metal clips (shell fragment) in the overcoat front end circular hole; Upper left three width of cloth figure are the shell fragment of folded state, and the little cuboid partial fixing in 2 places is on overcoat front end annular sidewall; The lower right corner is the shell fragment deployed condition.

Figure 10 is the three-view diagram of the present injection needles that generally uses clinically.

Connected mode:

Fig. 8 inner sleeve shape internal diameter approximates Fig. 6 syringe cylinder external diameter, and the length of the inside ledge of cover equals the degree of depth of Fig. 6 syringe concave groove type track in Fig. 8, make to be placed in Fig. 6 syringe front end in Fig. 8 and from outside fit syringe, and interior cover can not drop from syringe.

The internal diameter of Fig. 7 overcoat approximates Fig. 6 syringe cylinder external diameter and adds Fig. 8 sidewall of the inside race thickness, and the length of the inside ledge of Fig. 7 overcoat equals the degree of depth and Fig. 8 sidewall of the inside race thickness sum of Fig. 6 syringe concave groove type track, make Fig. 7 outer sleeve in Fig. 6 syringe and Fig. 8, overlap, and overcoat, interior cover and syringe fixing non-loosening between any two.The inside ledge in inside and outside cover two places is positioned at syringe spill track also can be along orbiting motion.

Fig. 9 metal clips and Fig. 7 overcoat front end circular hole internal side wall fix, and are between interior cover and the overcoat, so be folded state; When overcoat was pushed, cover back was launched certain angle automatically and is fully launched to cover overcoat front end circular hole until shell fragment and be 90 ° of expansion in shell fragment left.The cover external diameter adds that thickness equaled Fig. 7 outer casing internal diameter when Fig. 9 shell fragment was folding in Fig. 8, and the thickness of Fig. 7 shell fragment when folding is very little, less than 0.5mm.

Figure 10 entry needle afterbody pin fixes with Fig. 6 syringe front end pintle and overlap the front inner wall spiral way in Fig. 8 and is combined, be that syringe front end pintle external diameter equals entry needle afterbody internal diameter, cover front end circular hole bottom diameter in entry needle afterbody external diameter equals, when cover was driven in making, entry needle moved and breaks away from syringe because fixing with interior cover.

The specific embodiment

In Fig. 1, the syringe front end is with interior cover; Interior cover is with overcoat with the syringe skin; Cover, outer casing inner wall ledge and the syringe upper groove is chimeric and can be along orbiting motion in the syringe, namely the overcoat movement locus is " 7 " font, interior cover movement locus is " 1 " font.Outer casing inner wall ledge original position is top, syringe groove part " 7 " font upper left side, so overcoat not in the motion track of front and back, plays fixation when injecting, namely overcoat, interior cover can't move forward and backward; When being rotated to straight path top cylinder overcoat, can outwards deviate from the outer casing inner wall ledge.Entry needle is connected with syringe, interior cover in rotary manner, and entry needle is connected closely with syringe cylinder.

In Fig. 2, after injection finishes, turn to its straight path on also extrapolated along impression orbit overcoat.When overcoat was outwards mobile, entry needle and interior cover inwardly moved with respect to overcoat, and had entry needle is accommodated in trend in the overcoat.When in metal clips leaves syringe, overlapping, automatically spring open from folded state, as shown in Figure 4.When metal clips passed through the injection needle point, shell fragment was closed syringe overcoat front end circular hole, and at this moment, entry needle can't pass through left, as shown in Figure 2.When overcoat outwards continued to release, the outer casing inner wall ledge promoted inner sleeve shape bottom simultaneously.Because entry needle and interior cover screw fixed, so the time in cover and entry needle can regard an integral body as, common kinestate is arranged.

In Fig. 3, in overcoat promotes during cover, entry needle is because fixedly breaking away from the pintle part of syringe front end with interior cover.Because the external diameter of cover and the internal diameter of syringe overcoat differ in 0.5mm in the syringe, so the interior cover direction of motion only may be moved being parallel to the sleeve side wall direction, and can not emerge in the syringe overcoat.Therefore, between entry needle is closed in and overlaps in syringe overcoat and the syringe, and break away from syringe cylinder.Reach the effect of isolating entry needle.

Claims

1. disposable syringe, comprise: have the interior cover of syringe (cover in being called for short) that entry needle, push rod and the piston of needle guard, the syringe cylinder (abbreviation syringe) that has the event trace groove, the syringe overcoat (abbreviation overcoat) with metal coating shell fragment and inwall have screw thread, be characterized in: before the injection, entry needle (general) is fixed in the syringe front end in a spiral manner, entry needle and interior cover inner thread agree with and screw, and have improved the sealing between syringe and entry needle and have prevented the effect that entry needle comes off; This moment, entry needle and interior cover were integral.After injection finishes, along " 7 font " the groove event trace on the syringe, being overcoat promotes overcoat with respect to syringe forward end after the right rotation, when overcoat is inserted in inside with entry needle fully, metal clips in the overcoat front end circular hole automatically springs open from the state of original folding compression, to cover circular hole.Continue to promote in the process of overcoat, cover is outwards deviate from driving, and interior cover and entry needle are deviate from simultaneously because of screw fixed, and entry needle is closed in the isolated inside and outside cover, reaches the purpose that prevents acupuncture.

2. the syringe cylinder (abbreviation syringe) that has the event trace groove according to claim 1; it is characterized in that: needle cylinder surface has the umbilicate type groove of vertical fold line " 7 " zag trajectory; be used for overcoat, the inside ledge of interior cover chimeric, and can be according to the movement locus activity.Track perpendicular to syringe overlaps and overcoat in order in fixing, makes it be difficult for outwards deviating from, and the track that is parallel to syringe then is the active path that interior cover and overcoat are deviate from.

3. the syringe overcoat (abbreviation overcoat) with metal coating shell fragment according to claim 1, it is characterized in that: fully around interior cover and syringe barrel portion, the relative inside ledge in overcoat tail end two places is little square, and be embedded in the needle cylinder surface groove, can slide by dog-leg path; Leading portion circular open energy and only can make that entry needle is parallel to be passed through; Have sidewall that the folded metal monolithic is arranged in the opening, after overcoat left initial position, original folded metal shell fragment can launch up to blocking the overcoat front opening fully automatically.

4. inwall according to claim 1 has the interior cover of syringe (cover in being called for short) of screw thread, it is characterized in that: be between overcoat and the syringe, can closely entangle the syringe front end; The relative inside ledge in interior cover tail end two places is embedded in the needle cylinder surface groove, can slide by dog-leg path; In cover leading portion circular open inwall be helicitic texture, with in a spiral manner fixedly entry needle in syringe, the effect that has increased sealing and prevented from coming off.At this moment, entry needle and interior cover screw fixed are an assembly, and entry needle tightly is placed in syringe front end ledge.

5. the syringe overcoat (abbreviation overcoat) with metal coating shell fragment according to claim 3, wherein said sleeve and the elastic piece structure that covers entry needle.Metal clips and overcoat front end circular hole internal side wall fix, and are between interior cover and the overcoat, so be folded state; When overcoat was pushed, cover back was launched certain angle automatically and is fully launched to cover overcoat front end circular hole until shell fragment and be 90 ° of expansion in shell fragment left, and the thickness of shell fragment when folding is very little, less than 0.5mm.

6. inwall according to claim 4 has the interior cover of syringe (cover in being called for short) of screw thread, the structure of wherein said interlock release entry needle.