CN1692957A - Safety taking-back and self-broke type syringe - Google Patents
Safety taking-back and self-broke type syringe Download PDFInfo
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- CN1692957A CN1692957A CN 200510040256 CN200510040256A CN1692957A CN 1692957 A CN1692957 A CN 1692957A CN 200510040256 CN200510040256 CN 200510040256 CN 200510040256 A CN200510040256 A CN 200510040256A CN 1692957 A CN1692957 A CN 1692957A
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- location division
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Abstract
A high-safe self-destroyed injector is composed of an external sleeve pipe with sealed locator having a through hole, a core rod consisting of main rod and top end with elastic sealing structure, and a withdrawable unit with an axial through hole, a conic head inserted through the thruogh hole of said sealed locator of external pipe, and a locator whose external surface is closely matched with the inner surface of the through hole of said sealed locator.
Description
Technical field
The present invention relates to a kind of safety self-destructive syringe, belong to medical instruments field.
Background technology
China Patent No. is 00219356.6, and the utility model patent description that name is called " obstruction type disposable syringe " discloses a kind of syringe.This syringe comprises overcoat, core bar, piston; Overcoat has conehead, and conehead is provided with cone head hole, is provided with annular boss in the cone head hole; Piston nose is provided with plug, and the plug rear end has otch, and the plug center is provided with arbor; Piston is connected with plug, can be made into integration, and also can bondingly form; Plug has tapering, and front end is the microcephaly; The annular boss inwall is provided with at least one axial diversion groove; The core bar rear portion is provided with locating part.The technology difficulty that the plug of said syringe and piston are made into integration is bigger, and the rate that manufactures a finished product is lower, and is with high costs, in use because rubber has better elastic, thus the otch of plug rear end easy fracture not, the difficult effect that reaches obstruction; If bonding forming, plug are difficult to accurately to be positioned at the center of piston,,, can't normally use so just come off easily when not using because bond area is little.
Summary of the invention
The object of the present invention is to provide a kind ofly after injection is finished, self-locking injection passage and the pulling core bar parts of can shrinking back when wanting to reuse are then shunk back and self-destruction, and the broken and a kind of safety taking-back and self-broke type syringe of self-destruction of the shaft of core bar.
Technical scheme of the present invention: comprise overcoat and core bar; Core bar is the integral piece with shaft and top; Syringe also has the parts of can shrinking back, and the parts of can shrinking back are the integral piece with conehead and location division, and the location division is arranged on the bottom of the parts of can shrinking back, and the parts of can shrinking back have axially extending bore; Be provided with airtight location division on the top of overcoat, overcoat and airtight location division are integral piece, and airtight location division has through hole; The conehead of parts of can shrinking back passes the through hole of airtight location division, the outer wall of the location division of the parts of can shrinking back can with airtight cooperation of inwall of the through hole of airtight location division; Can shrink back the external diameter at outer wall and the place of matching of the inwall of the through hole of airtight location division of location division of parts greater than the internal diameter 0.05mm to 1mm at the place that matches of the outer wall of the inwall of the through hole of airtight location division and the location division of the parts of can shrinking back; Top at core bar is provided with elastic sealing structure.
The elastic sealing structure at the top of above-mentioned core bar is made of elastic groove and sealing ring, and the top of elastic sealing structure and core bar is an integral piece; The outer wall of the sealing ring of elastic sealing structure can match with the inwall of overcoat, and the outer wall of sealing ring matches the external diameter at place greater than the internal diameter 0.05mm to 2.5mm of overcoat with the inwall of overcoat.
Said syringe also has the self-locking boss; The self-locking boss is arranged on the inwall of axially extending bore of the parts of can shrinking back, and the internal diameter of self-locking boss is less than the internal diameter 0.05mm to 1mm of the inwall of the axially extending bore of the parts of can shrinking back; The top of core bar comprises nose bar, and nose bar can match with the axially extending bore of the parts of can shrinking back, and the external diameter at nose bar and the place of matching of the axially extending bore of the parts of can shrinking back is greater than the internal diameter 0.05mm to 1.5mm at the place that matches of the axially extending bore of the parts of can shrinking back and nose bar.
The outer wall of the location division of the above-mentioned parts of shrinking back has up-small and down-big tapering, and then the inwall of the through hole of the airtight location division on the top of overcoat has corresponding up-small and down-big tapering.
The shaft of above-mentioned core bar is a cross fin shaft, is provided with broken structure on the shaft of core bar.
Above-mentioned surperficial both sides at nose bar are provided with axial intake chute.
This syringe also has entry needle, and entry needle has needle tubing, connecting portion and needle stand, and the needle stand of entry needle is with the conehead hot melt or be adhesively fixed and be connected.
The shaft of above-mentioned core bar is a cross fin shaft, and the rear portion of a fin is provided with locating part therein; To prevent faulty operation.
The present invention has positive result of use: because syringe also has the parts of can shrinking back, the parts of can shrinking back are the integral piece with conehead and location division, and the location division is arranged on the bottom of the parts of can shrinking back, and the parts of can shrinking back have axially extending bore; Be provided with airtight location division on the top of overcoat, overcoat and airtight location division are integral piece, and airtight location division has through hole; The conehead of parts of can shrinking back passes the through hole of airtight location division, the outer wall of the location division of the parts of can shrinking back can with airtight cooperation of inwall of the through hole of airtight location division; Can shrink back the external diameter at outer wall and the place of matching of the inwall of the through hole of airtight location division of location division of parts greater than the internal diameter at the place that matches of the outer wall of the inwall of the through hole of airtight location division and the location division of the parts of can shrinking back; The outer wall of location division of parts of can shrinking back has up-small and down-big tapering, and then the inwall of the through hole of the airtight location division on the top of overcoat has corresponding up-small and down-big tapering, guarantees that syringe can draw and liquid medicine injection normally; Because syringe also has the self-locking boss; The self-locking boss is arranged on the inwall of axially extending bore of the parts of can shrinking back, the internal diameter of self-locking boss is less than the internal diameter of the inwall of the axially extending bore of the parts of can shrinking back, but self-locking injection passage after injection is finished, when the pulling core bar was wanted to reuse, the parts of then can shrinking back were then shunk back; In embodiments of the invention 1, the top of core bar comprises nose bar, nose bar can match with the axially extending bore of the parts of can shrinking back, the external diameter at nose bar and the place of matching of the axially extending bore of the parts of can shrinking back is greater than the internal diameter at the place that matches of the axially extending bore of the parts of can shrinking back and nose bar, surperficial both sides at nose bar are provided with axial intake chute, when liquid medicine injection, can reduce the residual flow amount of medicinal liquid; After injection was finished, the nose bar of the head of core bar entered in the axially extending bore of the parts of can shrinking back; When pulling back core bar, the active force of pulling core bar is shunk back the parts of can shrinking back, and reaches the self-locking injection passage and shrinks back and the purpose of self-destruction, owing to syringe can't be reused and has certain safety; The needle stand of entry needle or hot melt bonding with conehead fixedlyed connected, and prevents that entry needle from reusing; When pulling back core bar, entry needle also is retracted into the inside of overcoat, can prevent that the needle tubing accident from hurting sb.'s feelings, and reaches the effect of the safety of strengthening syringe; The shaft of core bar is a cross fin shaft, is provided with broken structure on the shaft of core bar, and the core bar that can fracture after injection is finished can't be reused syringe, reaches the effect of the self-destruction of strengthening syringe.The present invention is rational in infrastructure, and technology is simple, and dependable performance has practicality, is can't reusable a kind of safety taking-back and self-broke type syringe.
Description of drawings
Fig. 1 is the configuration diagram of embodiment 1 (injection finish after);
Fig. 2 is the A-A profile of Fig. 1;
Fig. 3 is the B-B profile of Fig. 1;
Fig. 4 is the airtight location division diagrammatic sketch on top of the overcoat of embodiment 1;
Fig. 5 is the shunk back parts diagrammatic sketch of embodiment 1;
Fig. 6 is the C-C profile of Fig. 1;
After finishing for embodiment 1 injects, Fig. 7 pulls back out the design sketch of core bar;
Fig. 8 is the configuration diagram of embodiment 2 (injection finish after);
Fig. 9 is the shunk back parts diagrammatic sketch of embodiment 2;
Figure 10 is the airtight location division diagrammatic sketch on top of the overcoat of embodiment 2;
Figure 11 is the K-K profile of Fig. 8;
Figure 12 is the configuration diagram of embodiment 3 (injection finish after);
Figure 13 is the shunk back parts diagrammatic sketch of embodiment 3;
Figure 14 is the airtight location division diagrammatic sketch on top of the overcoat of embodiment 3;
Figure 15 is the top of core bar of embodiment 3 and the sealing ring location division diagrammatic sketch of elastic sealing structure;
Figure 16 is the configuration diagram of embodiment 4 (injection finish after);
Figure 17 is the shunk back parts diagrammatic sketch of embodiment 4;
Figure 18 is the airtight location division diagrammatic sketch on top of the overcoat of embodiment 4;
Figure 19 is the top of core bar of embodiment 4 and the sealing ring location division diagrammatic sketch of elastic sealing structure;
Figure 20 is the configuration diagram of embodiment 5 (injection finish after);
Figure 21 is the top of core bar of embodiment 5 and the sealing ring location division diagrammatic sketch of elastic sealing structure;
Figure 22 is the top and the elastic sealing structure diagrammatic sketch of the core bar of embodiment 6;
Figure 23 is the top of core bar of embodiment 6 and the sealing ring location division diagrammatic sketch of elastic sealing structure;
Figure 24 is the top and the elastic sealing structure diagrammatic sketch of the core bar of embodiment 7;
Figure 25 is the top and the elastic sealing structure diagrammatic sketch of the core bar of embodiment 8;
Figure 26 is the top and the elastic sealing structure diagrammatic sketch of the core bar of embodiment 9;
Figure 27 is the top and the elastic sealing structure diagrammatic sketch of the core bar of embodiment 10;
Figure 28 is the shaft configuration diagram of the core bar of embodiment 11;
Figure 29 is the D-D profile of Figure 28;
Figure 30 is the shaft configuration diagram of the core bar of embodiment 12;
Figure 31 is the E-E profile of Figure 30;
Figure 32 is the shaft configuration diagram of the core bar of embodiment 13;
Figure 33 is the F-F profile of Figure 32;
Figure 34 is the shaft configuration diagram of the core bar of embodiment 14;
Figure 35 is the G-G profile of Figure 34;
Figure 36 is the shaft configuration diagram of the core bar of embodiment 15;
Figure 37 is the H-H profile of Figure 36.
The specific embodiment
Embodiment 1
See Fig. 1 to Fig. 7, the employed material of the syringe of present embodiment meets national standard.The syringe of present embodiment comprises overcoat 20 and core bar 40; Core bar 40 is for having the integral piece at shaft 41 and top 42; Syringe also has the parts 10 of can shrinking back, and the parts 10 of can shrinking back are for having the integral piece of conehead 11 and location division 13, and location division 13 is arranged on the bottom of the parts 10 of can shrinking back, and the parts 10 of can shrinking back have axially extending bore 12; Be provided with airtight location division 50 on the top of overcoat 20, overcoat 20 is an integral piece with airtight location division 50, and airtight location division 50 has through hole 51; The conehead 11 of parts 10 of can shrinking back passes the through hole 51 of airtight location division 50, the outer wall of the location division 13 of the parts 10 of can shrinking back can with airtight cooperation of inwall of the through hole 51 of airtight location division 50; Can shrink back the external diameter at outer wall and the place of matching of the inwall of the through hole 51 of airtight location division 50 of location division 13 of parts 10 greater than the internal diameter 0.25mm at the place that matches of the outer wall of the inwall of the through hole 51 of airtight location division 50 and the location division 13 of the parts 10 of can shrinking back; Top 42 at core bar 40 is provided with elastic sealing structure 30; The elastic sealing structure 30 at the top 42 of core bar 40 is made of elastic groove 31 and sealing ring 32, and elastic sealing structure 30 is an integral piece with the top 42 of core bar 40; The outer wall of the sealing ring 32 of elastic sealing structure 30 can match with the inwall of overcoat 20, and the outer wall of sealing ring 32 matches the external diameter at place greater than the internal diameter 0.25mm of overcoat 20 with the inwall of overcoat 20, can guarantee that syringe is normal to draw and liquid medicine injection; The direction of the opening of elastic groove 31 is the below, to reduce the residual flow amount of medicinal liquid; Syringe also has self-locking boss 80; Self-locking boss 80 is arranged on the inwall of axially extending bore 12 of the parts 10 of can shrinking back, and the internal diameter of self-locking boss 80 is less than the internal diameter 0.25mm of the inwall of the axially extending bore 12 of the parts 10 of can shrinking back; The top 42 of core bar 40 comprises nose bar 43, nose bar 43 can match with the axially extending bore 12 of the parts 10 of can shrinking back, and the external diameter at nose bar 43 and the place of matching of the axially extending bore 12 of the parts 10 of can shrinking back is greater than the internal diameter 0.25mm at the place that matches of the axially extending bore 12 of the parts 10 of can shrinking back and nose bar 43; The outer wall of the location division 13 of parts 10 has up-small and down-big tapering owing to can shrink back, then the inwall of the through hole 51 of the airtight location division 50 on the top of overcoat 20 has corresponding up-small and down-big tapering, thereby can change the size of the active force that can shrink back parts 10 generation disengagements and shrink back; This tapering can accord with standard taper, Morse's taper, metric taper and Rule circular cone tapering; See Fig. 1, Fig. 2 and Fig. 4, the external diameter at the outer wall of the location division 13 of the parts 10 of can shrinking back and the place of matching of the inwall of the through hole 51 of airtight location division 50 is greater than the internal diameter 0.25mm at the place that matches of the outer wall of the inwall of the through hole 51 of airtight location division 50 and the location division 13 of the parts 10 of can shrinking back; The outer wall of location division 13 of parts 10 of can shrinking back has up-small and down-big tapering, and then the inwall of the through hole 51 of the airtight location division 50 on the top of overcoat 20 has corresponding up-small and down-big tapering, and this tapering is 1: 30 of standard taper in the present embodiment; Present embodiment employing specification is 5 milliliters a syringe, 5 milliliters of syringes of national standard defined core bar 40 maximum force of pushing away, drawing in use are 25 newton, the size of the active force that makes the parts 10 of can shrinking back that disengagement takes place in the present embodiment and shrink back can be designed as 35 newton, can guarantee that syringe assembles normally, can draw normally and liquid medicine injection in use; See Fig. 1 and Fig. 2, be provided with axial intake chute 44 in the surperficial both sides of nose bar 43, last medicinal liquid enters by axial intake chute 44 in the axially extending bore 12 of the parts 10 of can shrinking back, to reduce the residual flow amount of medicinal liquid.See Fig. 7, when core bar 40 is advanced to the end, after injecting liquid drug is finished, nose bar 43 enters in the axially extending bore 12 of the parts 10 of can shrinking back, because self-locking boss 80 is arranged on the inwall of axially extending bore 12 of the parts 10 of can shrinking back, the internal diameter of self-locking boss 80 is less than the internal diameter 0.25mm of the inwall of the axially extending bore 12 of the parts 10 of can shrinking back; Nose bar 43 can match with the axially extending bore 12 of the parts 10 of can shrinking back, the external diameter at nose bar 43 and the place of matching of the axially extending bore 12 of the parts 10 of can shrinking back is greater than the internal diameter 0.25mm at the place that matches of the axially extending bore 12 of the parts 10 of can shrinking back and nose bar 43, pressure is self-locking in nose bar 43 can to shrink back in the axially extending bore 12 of parts 10, therefore can't draw medicinal liquid, reach the purpose of self-locking injection passage; When pulling back core bar 40 and want to reuse, active force designed making in the present embodiment of pulling core bar 40 can be shunk back, and parts 10 take place to throw off and 35 newton's that shrink back active force, thereby make the parts 10 of to shrink back take place to throw off and shrink back, syringe reaches the self-locking injection passage and shrinks back and the purpose of self-destruction, owing to can't be reused and has certain safety; See Fig. 1 and Fig. 7, this syringe also has entry needle 70, and entry needle 70 has needle tubing 71, connecting portion 72 and needle stand 73, and needle stand 73 hot melts of entry needle 70 or be adhesively fixed are connected on the conehead 10, prevents that entry needle 70 from reusing; When pulling back core bar 40, entry needle 70 also is retracted into the inside of overcoat 20, can prevent that needle tubing 71 accidents from hurting sb.'s feelings, and reaches the effect of the safety of strengthening syringe; See Fig. 6 and Fig. 7, the shaft 41 of core bar 40 is a cross fin shaft, on the shaft 41 of core bar 40, be provided with broken structure 45, twitch core bar 40 backward approximately after half, can make broken structure 45 on the shaft 41 of core bar 40 be exposed to the outside of overcoat 20, utilize lever principle be easier to just can the to fracture shaft 41 of core bar 40, syringe can't be reused, reach the effect of the self-destruction of strengthening syringe.
See Fig. 1, Fig. 6 and Fig. 7, the shaft 41 of core bar 40 is a cross fin shaft, the rear portion of a fin is provided with locating part 60 therein, the mistake that prevents to need pulling core bar 40 in the process of assembling or injection preparation and cause core bar 40 to be shifted onto the end by mistake takes place, junction at fin and locating part 60 is provided with breach 61, be convenient to locating part 60 finish the injection preparation after or in injection process, locating part 60 is fractureed or opisthotonos.
Embodiment 2
See Fig. 8 to Figure 11, the needle tubing 71 of present embodiment syringe is by inwall bonding be fixed on can shrink back parts 10 on of connecting portion 72 with the axially extending bore 12 of the parts 10 of can shrinking back; The elastic sealing structure 30 at the top 42 of core bar 40 is made of elastic groove 31 and sealing ring 32, and the direction of the opening of elastic groove 31 is the top; See Fig. 9 and Figure 10, be provided with airtight step 52, then be provided with step 14 in the lower end of the location division 13 of the parts 10 of can shrinking back in the lower end of the inwall of the through hole 51 of the airtight location division 50 on the top of overcoat 20; Can shrink back the external diameter of step 14 of location division 13 of parts 10 greater than the internal diameter 0.25mm of the airtight step 52 on the inwall of the through hole 51 of airtight location division 50, reach to strengthen and guarantee that syringe can be drawn normally and the purpose of liquid medicine injection; The outer wall of location division 13 of parts 10 of can shrinking back has up-small and down-big tapering, and then the inwall of the through hole 51 of the airtight location division 50 on the top of overcoat 20 has corresponding up-small and down-big tapering, and this tapering is 6: 100 of Rule circular cone tapering in the present embodiment; See Fig. 8 and Figure 11, the shaft 41 of core bar 40 is a Y shape fin shaft.Present embodiment is applicable to the syringe of 20 milliliters of following specifications.All the other are identical with embodiment 1.
Embodiment 3
See Figure 12 to Figure 15, the present embodiment syringe is provided with airtight step 52 in the upper end of the inwall of the through hole 51 of the airtight location division 50 on the top of overcoat 20, then is provided with step 14 in the upper end of the location division 13 of the parts 10 of can shrinking back; Can shrink back the external diameter of step 14 of location division 13 of parts 10 greater than the internal diameter 0.2mm of the airtight step 52 on the inwall of the through hole 51 of airtight location division 50; See Figure 12 and Figure 13, be provided with O-ring seals 131 on the outer wall of the location division 13 of the parts 10 of can shrinking back, then be provided with sealing ring location division 132 on the outer wall of the location division 13 of the parts 10 of can shrinking back, O-ring seals 131 is nested with and is fixed on the sealing ring location division 132; The outer wall of O-ring seals 131 can match with the inwall of the through hole 51 of the airtight location division 50 on the top of overcoat 20, the outer wall of O-ring seals 131 matches the external diameter at place greater than the internal diameter 0.1mm of through hole 51 with the inwall of through hole 51, reach to strengthen to guarantee that syringe can be drawn normally and the purpose of liquid medicine injection; The quantity of O-ring seals 131 is 1 in the present embodiment, and the quantity of sealing ring location division 132 is identical with the quantity of O-ring seals 131; See Figure 12 and Figure 14, the location division 13 of the parts 10 of can shrinking back is for cylindrical, and then the through hole 51 of the airtight location division 50 on the top of overcoat 20 is cylindrical; See Figure 12 and Figure 15, the elastic sealing structure 30 at the top 42 of core bar 40 is made of O-ring seals 33 and sealing ring location division 34; The sealing ring location division 34 of elastic sealing structure 30 is an integral piece with the top 42 of core bar 40; The O-ring seals 33 of elastic sealing structure 30 is nested with and is fixed on the sealing ring location division 34; The outer wall of O-ring seals 33 can match with the inwall of overcoat 20, and the outer wall of O-ring seals 33 matches the external diameter at place greater than the internal diameter 0.25mm of overcoat 20 with the inwall of overcoat 20; The quantity of O-ring seals 33 is 1, and the quantity of sealing ring location division 34 is identical with the quantity of O-ring seals 33; The cross sectional shape of O-ring seals 33 is a garden shape, and the cross sectional shape of sealing ring location division 34 is a spill, and the assurance syringe can be drawn and liquid medicine injection normally; O-ring seals 33 and O-ring seals 131 employed materials are the medical grade rubber that meets national standard, can reach significant sealing affection, reduce simultaneously to push away, the purpose of the resistance when drawing core bar 20; O-ring seals 33 and O-ring seals 131 spendable materials are natural rubber, medical soft polychloroethylene, low-pressure polyethylene, politef in other embodiments; Simultaneously because O-ring seals 33 is very little with the contact surface of medicinal liquid, so the pH value that requires in national standard is more up to standard on the indexs such as heavy metal lead, stannum, zinc, ferrum and cadmic content, readily oxidizable substance and biological anomalies toxicity; And be low to moderate-30 degree Celsius most and be up to Celsius+70 when spending and still can normally use what national standard required.All the other are identical with embodiment 1.
Embodiment 4
See Figure 16 to Figure 19, the needle tubing of present embodiment syringe 71 and the parts 10 of can the shrinking back part that is fixed as one; See Figure 17 and Figure 18, be provided with airtight step 52, then be provided with step 14 in the lower end of the location division 13 of the parts 10 of can shrinking back in the lower end of the inwall of the through hole 51 of the airtight location division 50 on the top of overcoat 20; Can shrink back the external diameter of step 14 of location division 13 of parts 10 greater than the internal diameter 0.1mm of the airtight step 52 on the inwall of the through hole 51 of airtight location division 50; See Figure 16, do not have axial intake chute 44 in the surperficial both sides of nose bar 43, be provided with elastic groove 46 on nose bar 43, last medicinal liquid enters by elastic groove 46 in the axially extending bore 12 of the parts 10 of can shrinking back, to reduce the residual flow amount of medicinal liquid; See Figure 16 and Figure 19, the cross sectional shape of O-ring seals 33 is a rectangle, and the cross sectional shape of sealing ring location division 34 is a spill; See Figure 16 and Figure 17, upper end at the outer wall of the location division 13 of the parts 10 of can shrinking back is provided with shockproof 15 with the junction mutually of conehead 11, shockproof 15 external diameter is greater than the external diameter 0.05mm of location division 13, to prevent in the process of transportation and loading and unloading because more violent vibrations get loose the parts 10 of can shrinking back; Shockproof in the present embodiment 15 is circular point shape; Shockproof 15 quantity can be 1 to 20; Shockproof in the present embodiment 15 quantity is 12; Can be boss shape for shockproof in other embodiments 15, shockproof 15 external diameter is greater than the external diameter 0.015mm of location division 13.Present embodiment is applicable to the syringe of 20 milliliters of following specifications.All the other are identical with embodiment 3.
Embodiment 5
See Figure 20 to Figure 21, the needle tubing 71 of present embodiment syringe is by inwall bonding be fixed on can shrink back parts 10 on of connecting portion 72 with the axially extending bore 12 of the parts 10 of can shrinking back; On the outer wall of the location division 13 of the parts 10 of can shrinking back, do not have O-ring seals 131 and sealing ring location division 132; Upper end at the outer wall of the location division 13 of the parts 10 of can shrinking back does not have shockproof 15 with the junction mutually of conehead 11; The cross sectional shape of O-ring seals 33 is a garden shape, and the cross sectional shape of sealing ring location division 34 is a spill; The quantity of O-ring seals 33 is 2; The quantity of sealing ring location division 34 is identical with the quantity of O-ring seals 33.All the other are identical with embodiment 4.
Embodiment 6
See Figure 22 to Figure 23, the cross sectional shape of the O-ring seals 33 of present embodiment syringe is a triangle, and the cross sectional shape of sealing ring location division 34 is a triangle.All the other are identical with embodiment 4.
Embodiment 7
See Figure 24, the cross sectional shape of the O-ring seals 33 of present embodiment syringe is a spill, and the cross sectional shape of sealing ring location division 34 is a convex.All the other are identical with embodiment 4.
Embodiment 8
See Figure 25, the cross sectional shape of the O-ring seals 33 of present embodiment syringe is a T shape, and the cross sectional shape of sealing ring location division 34 is a spill.All the other are identical with embodiment 4.
Embodiment 9
See Figure 26, the cross sectional shape of the O-ring seals 33 of present embodiment syringe is a V-arrangement, and the cross sectional shape of sealing ring location division 34 is a triangle.All the other are identical with embodiment 4.
Embodiment 10
See Figure 27, the cross sectional shape of the O-ring seals 33 of present embodiment syringe is a M shape, and the cross sectional shape of sealing ring location division 34 is a convex.All the other are identical with embodiment 4.
Embodiment 11
See Figure 28 to Figure 29, the shaft 41 of the core bar 40 of present embodiment syringe is a T shape fin shaft.All the other with
Embodiment 1 is identical.
See Figure 30 to Figure 31, the shaft 41 of the core bar 40 of present embodiment syringe is a U-shaped shape fin shaft.All the other with
Embodiment 1 is identical.
See Figure 32 to Figure 33, the shaft 41 of the core bar 40 of present embodiment syringe is a V-arrangement shape fin shaft.All the other with
Embodiment 1 is identical.
See Figure 34 to Figure 35, the shaft 41 of the core bar 40 of present embodiment syringe is a H shape fin shaft.All the other with
Embodiment 1 is identical.
See Figure 36 to Figure 37, the shaft 41 of the core bar 40 of present embodiment syringe is a K shape fin shaft.All the other with
Embodiment 1 is identical.
The present invention is rational in infrastructure, and technology is simple, and dependable performance has practicality, is can't reusable a kind of safety taking-back and self-broke type syringe.
Claims (10)
1, a kind of safety taking-back and self-broke type syringe comprises overcoat (20) and core bar (40); Core bar (40) is for having the integral piece of shaft (41) and top (42); It is characterized in that: syringe also has the parts (10) of can shrinking back, the parts (10) of can shrinking back are for having the integral piece of conehead (11) and location division (13), location division (13) is arranged on the bottom of parts (10) of can shrinking back, and the parts (10) of can shrinking back have axially extending bore (12); Be provided with airtight location division (50) on the top of overcoat (20), overcoat (20) is an integral piece with airtight location division (50), and airtight location division (50) have through hole (51); The conehead (11) of parts (10) of can shrinking back passes the through hole (51) of airtight location division (50), the outer wall of the location division (13) of parts (10) of can shrinking back can with airtight cooperation of inwall of the through hole (51) of airtight location division (50); Can shrink back the external diameter at outer wall and the place of matching of the inwall of the through hole (51) of airtight location division (50) of location division (13) of parts (10) greater than the internal diameter 0.05mm to 1mm at the place that matches of the outer wall of the inwall of the through hole (51) of airtight location division (50) and the location division (13) of parts (10) of can shrinking back; Top (42) in core bar (40) is provided with elastic sealing structure (30).
2, a kind of safety taking-back and self-broke type syringe according to claim 1, it is characterized in that: the elastic sealing structure (30) at the top (42) of core bar (40) is made of elastic groove (31) and sealing ring (32), and elastic sealing structure (30) is an integral piece with the top (42) of core bar (40); The outer wall of the sealing ring (32) of elastic sealing structure (30) can match with the inwall of overcoat (20), and the outer wall of sealing ring (32) matches the external diameter at place greater than the internal diameter 0.05mm to 2.5mm of overcoat (20) with the inwall of overcoat (20).
3, a kind of safety taking-back and self-broke type syringe according to claim 1 is characterized in that: the elastic sealing structure (30) at the top (42) of core bar (40) is made of O-ring seals (33) and sealing ring location division (34); The sealing ring location division (34) of elastic sealing structure (30) is an integral piece with the top (42) of core bar (40); The O-ring seals (33) of elastic sealing structure (30) is nested with and is fixed on the sealing ring location division (34); The outer wall of O-ring seals (33) can match with the inwall of overcoat (20), and the outer wall of O-ring seals (33) matches the external diameter at place greater than the internal diameter 0.05mm to 3.5mm of overcoat (20) with the inwall of overcoat (20); The quantity of O-ring seals (33) is 1 to 8, and the quantity of sealing ring location division (34) is identical with the quantity of O-ring seals (33); The cross sectional shape of O-ring seals (30) is a garden shape; Or the cross sectional shape of O-ring seals (30) is a rectangle; Or the cross sectional shape of O-ring seals (30) is a triangle; Or the cross sectional shape of O-ring seals (30) is a T shape; Or the cross sectional shape of O-ring seals (30) is a spill; Or the cross sectional shape of O-ring seals (30) is a V-arrangement; Or the cross sectional shape of O-ring seals (30) is a M shape.
4, a kind of safety taking-back and self-broke type syringe according to claim 1 is characterized in that: syringe also has self-locking boss (80); Self-locking boss (80) is arranged on the inwall of axially extending bore (12) of parts (10) of can shrinking back, and the internal diameter of self-locking boss (80) is less than the internal diameter 0.05mm to 1mm of the inwall of the axially extending bore (12) of parts (10) of can shrinking back; The top (42) of core bar (40) comprises nose bar (43), nose bar (43) can match with the axially extending bore (12) of parts (10) of can shrinking back, and the external diameter at nose bar (43) and the place of matching of the axially extending bore (12) of parts (10) of can shrinking back is greater than the internal diameter 0.05mm to 1.5mm at the place that matches of the axially extending bore (12) of parts (10) of can shrinking back and nose bar (43).
5, a kind of safety taking-back and self-broke type syringe according to claim 1, it is characterized in that: the outer wall of the location division (13) of parts (10) of can shrinking back has up-small and down-big tapering, and then the inwall of the through hole (51) of the airtight location division (50) on the top of overcoat (20) has corresponding up-small and down-big tapering; Can shrink back the location division (13) of parts (10) for cylindrical, and then the through hole (51) of the airtight location division (50) on the top of overcoat (20) is cylindrical.
6, a kind of safety taking-back and self-broke type syringe according to claim 1, it is characterized in that: the lower end at the inwall of the through hole (51) of the airtight location division (50) on the top of overcoat (20) is provided with airtight step (52), then is provided with step (14) in the lower end of the location division (13) of parts (10) of can shrinking back; Upper end at the inwall of the through hole (51) of the airtight location division (50) on the top of overcoat (20) is provided with airtight step (52), then is provided with step (14) in the upper end of the location division (13) of parts (10) of can shrinking back; Can shrink back the external diameter of step (14) of location division (13) of parts (10) greater than the internal diameter 0.05mm to 1mm of the airtight step (52) on the inwall of the through hole (51) of airtight location division (50).
7, a kind of safety taking-back and self-broke type syringe according to claim 1, it is characterized in that: on the outer wall of the location division (13) of parts (10) of can shrinking back, be provided with O-ring seals (131), then be provided with sealing ring location division (132) on the outer wall of the location division (13) of parts (10) of can shrinking back, O-ring seals (131) is nested with and is fixed on the sealing ring location division (132); The outer wall of O-ring seals (131) can match with the inwall of the through hole (51) of the airtight location division (50) on the top of overcoat (20), and the outer wall of O-ring seals (131) matches the external diameter at place greater than the internal diameter 0.05mm to 1.5mm of through hole (51) with the inwall of through hole (51); The quantity of O-ring seals (131) is 1 to 8, and the quantity of sealing ring location division (132) is identical with the quantity of O-ring seals (131).
8, a kind of safety taking-back and self-broke type syringe according to claim 1, it is characterized in that: the upper end at the outer wall of the location division (13) of parts (10) of can shrinking back is provided with shockproof (15) with the junction mutually of conehead (11), and the external diameter of shockproof (15) is greater than the external diameter 0.01mm to 0.75mm of location division (13); Shockproof (15) are circular point shape; Or shockproof (15) are boss shape.
9, a kind of safety taking-back and self-broke type syringe according to claim 1 is characterized in that: the shaft (41) of core bar (40) is a cross fin shaft, is provided with broken structure (45) on the shaft (41) of core bar (40); Or the shaft (41) of core bar (40) is a Y shape fin shaft; Or the shaft (41) of core bar (40) is a T shape fin shaft; Or the shaft (41) of core bar (40) is a U-shaped shape fin shaft; Or the shaft (41) of core bar (40) is a V-arrangement shape fin shaft; Or the shaft (41) of core bar (40) is a H shape fin shaft; Or the shaft (41) of core bar (40) is a K shape fin shaft.
10, a kind of safety taking-back and self-broke type syringe according to claim 1 is characterized in that: be provided with axial intake chute (44) in the surperficial both sides of nose bar (43); On nose bar (43), be provided with elastic groove (46).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510040256 CN1692957A (en) | 2005-05-27 | 2005-05-27 | Safety taking-back and self-broke type syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510040256 CN1692957A (en) | 2005-05-27 | 2005-05-27 | Safety taking-back and self-broke type syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1692957A true CN1692957A (en) | 2005-11-09 |
Family
ID=35352196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510040256 Withdrawn CN1692957A (en) | 2005-05-27 | 2005-05-27 | Safety taking-back and self-broke type syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1692957A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836482A (en) * | 2012-09-10 | 2012-12-26 | 苏州市雅思精密模具有限公司 | Disposable injector and manufacturing technology thereof |
| CN108452433A (en) * | 2010-08-17 | 2018-08-28 | 贝克顿·迪金森公司 | non-Luer connector |
-
2005
- 2005-05-27 CN CN 200510040256 patent/CN1692957A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108452433A (en) * | 2010-08-17 | 2018-08-28 | 贝克顿·迪金森公司 | non-Luer connector |
| CN102836482A (en) * | 2012-09-10 | 2012-12-26 | 苏州市雅思精密模具有限公司 | Disposable injector and manufacturing technology thereof |
| CN102836482B (en) * | 2012-09-10 | 2014-03-05 | 苏州市雅思精密模具有限公司 | Disposable injector and manufacturing technology thereof |
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| WW01 | Invention patent application withdrawn after publication |