CN1544104A - Self-damaging safe injector with blocking mechanism - Google Patents
Self-damaging safe injector with blocking mechanism Download PDFInfo
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- CN1544104A CN1544104A CNA2003101062967A CN200310106296A CN1544104A CN 1544104 A CN1544104 A CN 1544104A CN A2003101062967 A CNA2003101062967 A CN A2003101062967A CN 200310106296 A CN200310106296 A CN 200310106296A CN 1544104 A CN1544104 A CN 1544104A
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Abstract
The invention relates to a self-destructing syringe comprising a tapered head, a core bar, a jacket and a piston, wherein the tapered head is provided with a tapered head hole, the tapered head is integrated with the jacket, the core bar is an integrated member of a header, a neck and a rod body, the piston is sleeved on the top end of the core bar. The syringe also includes a clogging sheet, which is provided with a sealing and positioning portion, the piston is provided with a coupling and positioning portion, wherein the sealing and positioning portion of the clogging sheet and the coupling and positioning portion of the piston socket each other for closed coupling and positioning. The invention realizes reasonable structure, convenient manufacture, simple process for manufacturing, and dependable performance, wherein a clogged self-destructing safety syringe unable to be reused is provided.
Description
Technical field
The present invention relates to a kind of 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 of after injection is finished blocking-up and inaccessible injection passage and self-destruction can't reusable a kind of resistance be closed destructing safety type syringe.
Technical scheme of the present invention: this syringe comprises conehead, core bar, overcoat and piston; Conehead has cone head hole, and conehead and overcoat are integral piece; Core bar is the integral piece with head, cervical region and shaft; Piston is nested with on the head of core bar; This syringe also has resistance and closes sheet, resistance is closed sheet and is provided with airtight location division, piston is provided with in conjunction with the location division, the combining to peg graft mutually in the location division of the airtight location division that sheet is closed in resistance and piston and airtight in conjunction with locating, in order to achieve the above object, be provided with resistance in the upper end of the inside of overcoat and close the chamber, the internal diameter of the internal diameter in chamber less than the inner chamber of overcoat closed in resistance, resistance is closed sheet and can be closed the chamber with resistance and match, and sheet and the external diameter that hinders the place of matching that closes the chamber close the chamber greater than resistance internal diameter is closed in resistance.
The airtight location division that sheet is closed in above-mentioned resistance is a convex column, piston be the matrix through hole in conjunction with the location division.
The airtight location division that sheet is closed in above-mentioned resistance is a concave hole, piston be convex column in conjunction with the location division.
This syringe also has entry needle, and entry needle has needle tubing, connecting portion and needle stand, the needle stand of entry needle and conehead hot melt or be adhesively fixed.
The inwall of above-mentioned cone head hole is provided with the anti-portion of disclosing, and the anti-portion of disclosing is provided with delivery hole, and delivery hole is the part of cone head hole, and the sectional area of delivery hole is greater than the sectional area of needle tubing.
Above-mentioned core bar is a cross fin core bar, and the rear portion of a fin has locating part therein, to prevent faulty operation.
The present invention has positive result of use: because the combining to peg graft mutually in the location division of the airtight location division that sheet is closed in resistance and piston and airtight in conjunction with locating, the airtight location division that sheet is closed in resistance is a convex column, piston be the matrix through hole in conjunction with the location division, can draw normally and liquid medicine injection, in order to achieve the above object, be provided with resistance in the upper end of the inside of overcoat and close the chamber, the internal diameter of the internal diameter in chamber less than the inner chamber of overcoat closed in resistance, resistance is closed sheet and can be closed the chamber with resistance and match, and sheet and the external diameter that hinders the place of matching that closes the chamber close the chamber greater than resistance internal diameter is closed in resistance; Inwall at cone head hole is provided with the anti-portion of disclosing, and the anti-portion of disclosing is provided with delivery hole, and delivery hole is the part of cone head hole, and the sectional area of delivery hole is injected to guarantee medicinal liquid continuously greater than the sectional area of needle tubing; Anti-setting of disclosing portion can prevent that after injection is finished resistance from closing sheet and being disclosed; After injection is finished, constitute current path by the space between the upper surface of the top flat of the bottom surface of the head of the inwall of the matrix through hole of piston, piston and core bar and the space between the cervical region, piston and shaft, destroy the negative pressure chamber in the overcoat inner chamber, therefore can't draw medicinal liquid, syringe reaches resistance and closes injection passage and destroy negative pressure chamber in the overcoat inner chamber and the purpose of self-destruction, owing to can't be reused and has certain safety; Bonding or the hot melt of the needle stand of entry needle and conehead is fixed, and prevents that entry needle from reusing.The present invention is rational in infrastructure, and technology is simple, and dependable performance has practicality, is reusable a kind of resistance to close destructing safety type syringe.
Description of drawings
Fig. 1 is the configuration diagram of embodiment 1 (injection finish after);
Fig. 2 is the piston diagrammatic sketch of embodiment 1;
Fig. 3 is the F-F profile of Fig. 1;
After finishing for embodiment 1 injects, Fig. 4 pulls back out the design sketch of core bar and piston.
Fig. 5 is the configuration diagram of embodiment 2 (injection finish after).
Fig. 6 is the configuration diagram of embodiment 3 (injection finish after);
Fig. 7 is the N-N profile of Fig. 6;
Fig. 8 is the A-A profile of Fig. 6;
Fig. 9 closes the sheet diagrammatic sketch for the resistance of embodiment 3;
Figure 10 is the conehead configuration diagram of embodiment 3.
Figure 11 pulls back out the design sketch of core bar and piston after finishing for the configuration diagram of embodiment 4 and injection;
Figure 12 closes the sheet diagrammatic sketch for the resistance of embodiment 4;
Figure 13 is the piston diagrammatic sketch of embodiment 4.
Figure 14 is the configuration diagram of embodiment 5 (injection finish after);
Figure 15 is the D-D profile of Figure 14;
Figure 16 is the piston diagrammatic sketch of embodiment 5;
Figure 17 is the configuration diagram of top flat of head, cervical region and the shaft of the core bar of embodiment 5;
Figure 18 is that the G of Figure 17 is to view;
Figure 19 pulls back out the design sketch of core bar and piston after finishing for the configuration diagram of embodiment 5 and injection.
Figure 20 is the configuration diagram of embodiment 6 (injection finish after);
Figure 21 is the C-C profile of Figure 20;
Figure 22 is the configuration diagram of top flat of head, cervical region and the shaft of the core bar of embodiment 6;
Figure 23 is that the B of Figure 22 is to view.
Figure 24 is the configuration diagram of embodiment 7 (injection finish after);
Figure 25 closes the sheet diagrammatic sketch for the resistance of embodiment 7;
Figure 26 is the piston diagrammatic sketch of embodiment 7;
Figure 27 is the configuration diagram of embodiment 8 (injection finish after);
Figure 28 is the W-W profile of Figure 27;
Figure 29 is the piston diagrammatic sketch of embodiment 8;
Figure 30 is the configuration diagram of top flat of head, cervical region and the shaft of the core bar of embodiment 8;
Figure 31 is that the K of Figure 30 is to view;
After finishing for embodiment 8 injects, Figure 32 pulls back out the design sketch of core bar and piston.
Figure 33 pulls back out the design sketch of core bar and piston after finishing for the configuration diagram of embodiment 9 and injection;
Figure 34 closes the sheet diagrammatic sketch for the resistance of embodiment 9;
Figure 35 is the connection locating rod diagrammatic sketch of embodiment 9.
Figure 36 pulls back out the design sketch of core bar and piston after finishing for the configuration diagram of embodiment 10 and injection.
Figure 37 is the configuration diagram of embodiment 11 and the design sketch of safety shield;
Figure 38 is the Y-Y profile of Figure 37;
Figure 39 is that the X of Figure 37 is to view.
Figure 40 is the configuration diagram of embodiment 12;
Figure 41 is the Z-Z profile of Figure 40.
The specific embodiment
See Fig. 1 to Fig. 4, the employed material of the syringe of present embodiment meets national standard.The syringe of present embodiment has conehead 1, core bar 2, overcoat 3, piston 5, conehead 1 has cone head hole 1-1, conehead 1 is an integral piece with overcoat 3, and core bar 2 is for having the integral piece of head 2-1, cervical region 2-2 and shaft 2-3, and piston 5 is nested with on the head 2-1 of core bar 2; See Fig. 1 to Fig. 4, this syringe also has resistance and closes sheet 4, resistance is closed sheet 4 and is provided with airtight location division 4-1, piston 5 is provided with in conjunction with location division 5-1, the combining that location division 5-1 pegs graft mutually of the airtight location division 4-1 that sheet 4 is closed in resistance and piston 5 and airtight in conjunction with locating, the airtight location division 4-1 that sheet 4 is closed in resistance is a convex column, piston 5 be the matrix through hole in conjunction with location division 5-1, can draw normally and liquid medicine injection; Be provided with resistance in the upper end of the inside of overcoat 3 and close chamber 6, the internal diameter 0.85mm of the internal diameter in chamber 6 less than the inner chamber of overcoat 3 closed in resistance, and resistance is closed sheet 4 and can be closed chamber 6 with resistance and match, and sheet 4 and the external diameter that hinders the place of matching that closes chamber 6 close chamber 6 greater than resistance internal diameter 0.35mm is closed in resistance; Core bar 2 is pushed ahead piston 5 and is closed sheet 4 liquid medicine injections with resistance; Inwall at cone head hole 1-1 is provided with the anti-1-2 of portion that discloses, and prevents that disclosing the 1-2 of portion is provided with delivery hole, and delivery hole is the part of cone head hole 1-1, and the sectional area of delivery hole is greater than the sectional area 0.5mm of needle tubing 7-1
2, inject continuously to guarantee medicinal liquid; Anti-setting of disclosing the 1-2 of portion can prevent that after injection is finished resistance from closing sheet 4 and being disclosed; See Fig. 4, when core bar 2 is advanced to the end, after injecting liquid drug is finished, the resistance close sheet 4 enter the resistance close in the chamber 6, because sheet 4 and the external diameter that hinders the place of matching close chamber 6 close chamber 6 greater than resistance internal diameter 0.35mm is closed in resistance, pressure makes resistance close sheet 4 to be detained and to hinder and close in chamber 6 is closed in resistance, twitching core bar 2 backward when wanting to draw medicinal liquid, matrix through hole 5-1 by piston 5, the head 2-1 of the inwall of piston 5 and core bar 2 and the space between the cervical region 2-2, space between the upper surface of the top flat 2-3-1 of the bottom surface of piston 5 and shaft 2-3 constitutes current path, destroy the negative pressure chamber in the overcoat inner chamber, therefore can't draw medicinal liquid, syringe reaches resistance and closes injection passage and destroy negative pressure chamber in the overcoat inner chamber and the purpose of self-destruction, owing to can't be reused and has certain safety.
See Fig. 1, this syringe also has entry needle 7, and entry needle 7 has needle tubing 7-1, connecting portion 7-2 and needle stand 7-3, the needle stand 7-3 hot melt of entry needle 7 or be adhesively fixed on the conehead 1.
See Fig. 1, Fig. 3 and Fig. 4, the shaft 2-3 of core bar 2 is a cross fin shaft, the rear portion of a fin is provided with locating part 2-4 therein, the mistake that prevents to need to twitch core bar 2 in the process of assembling or injection preparation and cause core bar 2 to be shifted onto the end by mistake takes place, junction at fin and locating part 2-4 is provided with breach 2-3-2, be convenient to locating part 2-4 finish the injection preparation after or in injection process, locating part 2-4 is fractureed or opisthotonos.
See Fig. 5, the needle tubing 7-1 of present embodiment syringe and conehead 1 and overcoat 3 part that is fixed as one; The inwall of cone head hole 1-1 does not have the anti-1-2 of portion that discloses.All the other are identical with embodiment 1.
See Fig. 6 to Figure 10, the needle tubing 7-1 of present embodiment syringe is by connecting portion 7-2 and bonding being fixed on the conehead 1 of inwall that is arranged on the connecting hole 1-3 on the conehead 1; The inwall of cone head hole 1-1 does not have the anti-1-2 of portion that discloses; See Fig. 6, Fig. 8 and Fig. 9, close in resistance and be provided with two elastic groove 4-2 on the sheet 4 that sheet 4 and the external diameter that hinders the place of matching close chamber 6 close chamber 6 greater than resistance internal diameter 0.7mm is closed in resistance; The structure of piston 5 is identical with embodiment 1; See Fig. 6, after injection is finished, elastic groove 4-2 is subjected to hindering the extruding of the inwall that closes chamber 6 and is out of shape, pressure makes resistance close sheet 4 and is closed in chamber 6 is closed in resistance by resistance, syringe reaches resistance and closes injection passage and destroy negative pressure chamber in the overcoat inner chamber and the purpose of self-destruction, owing to can't be reused and has certain safety.All the other are identical with embodiment 1.
See Figure 11 to Figure 13, the inwall that the epimere in chamber 6 is closed in the resistance of present embodiment syringe has up-small and down-big tapering, resistance is closed sheet 4 and is had corresponding up-small and down-big tapering, the inwall that closes the hypomere in chamber 6 in resistance is provided with resistance and closes boss 6-1, the internal diameter that boss 6-1 is closed in resistance closes chamber 6 less than resistance epimere closes the boss 6-1 internal diameter 0.45mm of junction mutually with resistance, hinders the external diameter that closes sheet 4 closes boss 6-1 greater than resistance internal diameter 0.35mm; See Figure 11 and Figure 12, close in resistance and be provided with two elastic groove 4-2 on the sheet 4; See Figure 11, after injection was finished, resistance was closed sheet 4 compulsory resistances and is closed in chamber 6 is closed in resistance, reached resistance and closed injection passage and destroy negative pressure chamber in the overcoat inner chamber and the purpose of self-destruction, owing to syringe can't be reused and has certain safety.All the other are identical with embodiment 1.
See Figure 14 to Figure 19, sheet 4 is closed in the resistance of the syringe of present embodiment, resistance is closed chamber 6 and hinder the structure of closing boss 6-1 identical with embodiment 4; The effect that the syringe of present embodiment destroys the negative pressure chamber in the overcoat inner chamber is remarkable: see Figure 14, Figure 15 and Figure 16, on the roof of piston 5 inwalls, Yao Bi, diapire, respectively be provided with air drain 5-2,5-3,5-4, each air drain formation air channel that is connected, the conduct of this air channel and piston 5 is in conjunction with the matrix through hole of the location division 5-1 formation current path that is connected; See Figure 14, Figure 15, Figure 17 and Figure 18, on the head 2-1 of core bar 2 and cervical region 2-2, be provided with an axial air channel 2-1-1 until cervical region 2-2 root, on the top flat 2-3-1 of shaft 2-3, be provided with horizontal communication ditch 2-3-3, axially the air channel 2-1-1 formation current path that is connected with horizontal communication ditch 2-3-3; See Figure 19, after injection is finished, resistance is closed sheet 4 and is closed in chamber 6 is closed in resistance by resistance, if the space that is combined with of sheet 4 and cone head hole 1-1 is closed in resistance, twitching core bar 2 backward when wanting to draw medicinal liquid, matrix through hole 5-1 by piston 5, air drain 5-2,5-3, the current path that 5-4 is connected and forms, be arranged on the current path that axial air channel 2-1-1 on the core bar 2 and horizontal communication ditch 2-3-3 are connected and form, space between the upper surface of the top flat 2-3-1 of the bottom surface of piston 5 and shaft 2-3 constitutes total current path 8, destroy the negative pressure chamber in the overcoat inner chamber significantly, therefore can't draw medicinal liquid, syringe reaches resistance and closes injection passage and destroy negative pressure chamber in the overcoat inner chamber significantly and the purpose of self-destruction, owing to can't be reused and has certain safety.All the other are identical with embodiment 1.
See Figure 20 to Figure 23, the anti-delivery hole of disclosing on the 1-2 of portion of present embodiment syringe is set for the eccentric; The top of overcoat 3 has up-small and down-big tapering, and the top that chamber 6 is closed in resistance has corresponding up-small and down-big tapering, and the top that sheet 4 is closed in resistance has corresponding up-small and down-big tapering; Resistance is closed sheet 4 and is provided with an elastic groove 4-2; Resistance is closed sheet 4, resistance and is closed chamber 6 and resistance to close all the other of boss 6-1 identical with embodiment 5; The structure of piston 5 is identical with embodiment 5; The effect that the syringe of present embodiment destroys the negative pressure chamber in the overcoat inner chamber is remarkable: see Figure 20, Figure 22 and Figure 23, on core bar 2, be provided with one and run through head 2-1, the vertical core 2-5 of the top flat 2-3-1 of cervical region 2-2 and shaft 2-3, after injection is finished, resistance is closed sheet 4 and is closed in chamber 6 is closed in resistance by resistance, twitching core bar 2 backward when wanting to draw medicinal liquid, by vertical core 2-5 and the matrix through hole 5-1 that is arranged on the piston 5, air drain 5-2,5-3, the 5-4 current path that the air channel that forms constitutes that is connected, destroy the negative pressure chamber in the overcoat inner chamber significantly, therefore can't draw medicinal liquid, syringe reaches resistance and closes injection passage and destroy negative pressure chamber in the overcoat inner chamber significantly and the purpose of self-destruction, owing to can't be reused and has certain safety.All the other are identical with embodiment 1.
See Figure 24 to Figure 26, the airtight location division 4-1 that sheet 4 is closed in the resistance of present embodiment syringe is a concave hole, piston 5 be convex column in conjunction with location division 5-1; The concave hole of the airtight location division 4-1 of conduct that sheet 4 is closed in resistance combines location division 5-1 with the conduct of piston 5 convex column is pegged graft and airtight in conjunction with locating mutually; See Figure 26, be provided with axially extending bore 5-1-1 at the top of piston 5 and on as convex column in conjunction with location division 5-1; Resistance is closed chamber 6 and is not had resistance and close boss 6-1; Chamber 6 and resistance are closed in overcoat 3, resistance, and to close all the other of sheet 4 identical with embodiment 6; See Figure 24, when core bar 2 is advanced to the end, after injecting liquid drug is finished, the resistance close sheet 4 enter the resistance close in the chamber 6, because sheet 4 and the external diameter that hinders the place of matching close chamber 6 close chamber 6 greater than resistance internal diameter 0.4mm is closed in resistance, pressure makes resistance close sheet 4 and is closed in chamber 6 is closed in resistance by resistance, twitching core bar 2 backward when wanting to draw medicinal liquid, axially extending bore 5-1-1 by piston 5, the head 2-1 of the inwall of piston 5 and core bar 2 and the space between the cervical region 2-2, space between the upper surface of the top flat 2-3-1 of the bottom surface of piston 5 and shaft 2-3 constitutes current path, destroy the negative pressure chamber in the overcoat inner chamber, therefore can't draw medicinal liquid, syringe reaches resistance and closes injection passage and destroy negative pressure chamber in the overcoat inner chamber and the purpose of self-destruction, owing to can't be reused and has certain safety.All the other are identical with embodiment 1.
See Figure 27 to Figure 32, the airtight location division 4-1 that sheet 4 is closed in the resistance of present embodiment syringe is the ladder concave hole, piston 5 be convex column in conjunction with location division 5-1; See Figure 29, be provided with axially extending bore 5-1-1 at the top of piston 5 and on as convex column in conjunction with location division 5-1; See Figure 27 and Figure 30, on the head 2-1 of core bar 2, be provided with positioning convex rod 2-6, positioning convex rod 2-6 passes the axially extending bore 5-1-1 of piston 5, the ladder concave hole of the airtight location division 4-1 of conduct that sheet 4 is closed in resistance combines with the conduct of piston 5 that the convex column of location division 5-1 and positioning convex rod 2-6 peg graft mutually and airtight in conjunction with locating, to strengthen locating effect, prevent to hinder and close sheet 4 accidental; Resistance is closed sheet 4 and is provided with two elastic groove 4-2; Overcoat 3, resistance are closed sheet 4, resistance and are closed chamber 6 and resistance to close all the other of boss 6-1 identical with embodiment 6; The effect that the syringe of present embodiment destroys the negative pressure chamber in the overcoat inner chamber is remarkable: see Figure 27, Figure 28 and Figure 29, inwall at the axially extending bore 5-1-1 of piston 5 is provided with air drain 5-5, air drain 5-2,5-3,5-4 on the roof of air drain 5-5 and piston 5 inwalls, Yao Bi, the diapire formation air channel that is connected, this air channel formation current path that is connected with the axially extending bore 5-1-1 of piston 5; See Figure 27, Figure 28, Figure 30 and Figure 31, on the end face of the head 2-1 of core bar 2, central plane, bottom surface, respectively be provided with air drain 2-1-2,2-1-3,2-1-4, each air drain formation air channel that is connected, the horizontal communication ditch 2-3-3 on the top flat 2-3-1 of this air channel and the shaft 2-3 formation current path that is connected; See Figure 32, when core bar 2 is advanced to the end, after injection is finished, resistance is closed sheet 4 and is closed in chamber 6 is closed in resistance by resistance, twitching core bar 2 backward when wanting to draw medicinal liquid, by the through hole 5-1-1 that is arranged on the piston 5, air drain 5-2,5-3,5-4, the current path that 5-5 is connected and forms, be arranged on the air drain 2-1-2 on the core bar 2,2-1-3, the current path that 2-1-4 and horizontal communication ditch 2-3-3 are connected and form, total current path 8 that space between the upper surface of the top flat 2-3-1 of the bottom surface of piston 5 and shaft 2-3 constitutes, destroy the negative pressure chamber in the overcoat inner chamber significantly, therefore can't draw medicinal liquid, syringe reaches resistance and closes injection passage and destroy negative pressure chamber in the overcoat inner chamber significantly and the purpose of self-destruction, owing to can't be reused and has certain safety.All the other are identical with embodiment 1.
See Figure 33 to Figure 35, the airtight location division 4-1 that sheet 4 is closed in the resistance of present embodiment syringe is a concave hole, piston 5 be concave hole in conjunction with location division 5-1; This syringe also has and connects locating rod 4-3, but connect the epimere interference fit of locating rod 4-3 and closely fixing (also can be adhesively fixed) close in resistance among the concave hole of the airtight location division 4-1 of conduct of sheet 4, to prevent to connect locating rod 4-3 accidental; Resistance is closed sheet 4 by connecting locating rod 4-3 and stretching out in that resistance closes that hypomere outside the concave hole of the airtight location division 4-1 of conduct of sheet 4 combines location division 5-1 with the conduct of piston 5 concave hole is pegged graft mutually and airtight in conjunction with locating.All the other are identical with embodiment 1.
Embodiment 10
See Figure 36, the airtight location division 4-1 that sheet 4 is closed in the resistance of present embodiment syringe is a concave hole; The structure of piston 5 is identical with embodiment 5, piston 5 be concave hole in conjunction with location division 5-1; Close in resistance and to be provided with two elastic groove 4-2 on the sheet 4; Resistance is closed sheet 4 and connects all the other of locating rod 4-3 identical with embodiment 9; Resistance is closed sheet 4 by connecting locating rod 4-3 and stretching out in that resistance closes that hypomere outside the concave hole of the airtight location division 4-1 of conduct of sheet 4 combines location division 5-1 with the conduct of piston 5 concave hole is pegged graft mutually and airtight in conjunction with locating.All the other are identical with embodiment 5.
Embodiment 11
See Figure 37 to Figure 39, the syringe of present embodiment is that destructing safety type syringe is closed in the resistance with enhanced safety, and employed material meets national standard.The syringe of present embodiment also has safety shield 9, and safety shield 9 is the integral pieces that are made of pedestal 9-1, guard shield 9-2, sheet spring 9-3, hinge 9-4 and spanner 9-5; See Figure 37 and Figure 38, the side of guard shield 9-2 is open, and before syringe used, the elastic force of sheet spring 9-3 can make guard shield 9-2 remain on make position, with the needle tubing 7-1 of protection entry needle 7; See Figure 39, sheet spring 9-3 is arranged on open lateral another side with respect to guard shield 9-2 of safety shield 9, and hinge 9-4 is arranged on all the other both sides of safety shield 9, and pedestal 9-1 is connected with guard shield 9-2 by sheet spring 9-3 and hinge 9-4; See Figure 37, pulling spanner 9-5 with the junction of hinge 9-4 and pedestal 9-1 as overturning pivot can be to the side-lower guard shield 9-2 that overturns; After changing sheet spring 9-3 and hinge 9-4 and being positioned at mutual alignment on the safety shield 9, can change the flip angle of guard shield 9-2 with respect to the longitudinal center line of needle tubing 7-1, the change scope of flip angle is between 60 ° to 180 °; See Figure 37, the inwall of the pedestal 9-1 of safety shield 9 matches with the outer wall of the needle stand 7-3 of entry needle 7, safety shield 9 is nested with by pedestal 9-1 and is fixed on needle stand 7-3 and goes up (pedestal 9-1 also can be with needle stand 7-3 bonding or hot melt fix), comes off to prevent safety shield 9; The syringe of present embodiment has the good effect of enhanced safety: see Figure 37, before drawing medicinal liquid, the elastic force of sheet spring 9-3 can make guard shield 9-2 remain on make position; When drawing medicinal liquid, can pull spanner 9-5 with the junction of hinge 9-4 and pedestal 9-1 as overturning pivot to side-lower upset guard shield 9-2, after the axial centre of guard shield 9-2 is rotated the center of the overturning pivot of crossing hinge 9-4, the elastic force of sheet spring 9-3 makes guard shield 9-2 turn to respect to 125 ° of the longitudinal center lines of needle tubing 7-1 automatically and remains on 125 °, exposes needle tubing 7-1 and draws and liquid medicine injection with convenient; After injection is finished, can pull spanner 9-5 with the junction of hinge 9-4 and pedestal 9-1 as overturning pivot to side top upset guard shield 9-2, after the axial centre of guard shield 9-2 is rotated the center of the overturning pivot of crossing hinge 9-4, the elastic force of sheet spring 9-3 makes guard shield 9-2 upset be returned to make position automatically and remains closed, can prevent that needle tubing 7-1 accident from hurting sb.'s feelings, reach the effect of the safety of strengthening syringe.Because all the other structures of present embodiment syringe are identical with embodiment 5, can reach resistance closes injection passage and destroys negative pressure chamber in the overcoat inner chamber significantly and the purpose of self-destruction, can't reuse and have certain safety owing to syringe, the safety of the syringe of present embodiment has then been strengthened in the use of safety shield 9.The syringe of present embodiment is that destructing safety type syringe is closed in the resistance with enhanced safety.
Embodiment 12
See Figure 40 to Figure 41, the syringe of present embodiment is that destructing safety type syringe is closed in the resistance with enhanced safety.The inwall of the pedestal 9-1 of the safety shield 9 of present embodiment syringe matches with the outer wall of conehead 1, safety shield 9 is nested with on the outer wall that is fixed on conehead 1 (pedestal 9-1 also can be with conehead 1 bonding or hot melt fix) by pedestal 9-1, come off to prevent safety shield 9; All the other of safety shield 9 are identical with embodiment 11.The safety of the syringe of present embodiment has then been strengthened in the use of safety shield 9.All the other of present embodiment syringe are identical with embodiment 2.
Claims (10)
1, destructing safety type syringe is closed in a kind of resistance, comprises conehead (1), core bar (2), overcoat (3) and piston (5); Conehead (1) has cone head hole (1-1), and conehead (1) is an integral piece with overcoat (3); Core bar (2) is for having the integral piece of head (2-1), cervical region (2-2) and shaft (2-3); Piston (5) is nested with on the head (2-1) of core bar (2); It is characterized in that: this syringe also has resistance and closes sheet (4), resistance is closed sheet (4) and is provided with airtight location division (4-1), piston (5) is provided with in conjunction with location division (5-1), the combining to peg graft mutually in location division (5-1) of the airtight location division (4-1) that sheet (4) is closed in resistance and piston (5) and airtight combination is located, be provided with resistance in the upper end of the inside of overcoat (3) and close chamber (6), the internal diameter 0.05mm to 9.95mm of the internal diameter in chamber (6) less than the inner chamber of overcoat (3) closed in resistance, resistance is closed sheet (4) and can be closed chamber (6) with resistance and match, and external diameter that sheet (4) and resistance close the place of matching in chamber (6) closes chamber (6) greater than resistance internal diameter 0.05mm to 3.95mm is closed in resistance.
2, destructing safety type syringe is closed in a kind of resistance according to claim 1, it is characterized in that: the inwall that the epimere in chamber (6) is closed in resistance has up-small and down-big tapering, resistance is closed sheet (4) and is had corresponding up-small and down-big tapering, the inwall that closes the hypomere in chamber (6) in resistance is provided with resistance and closes boss (6-1), the internal diameter that boss (6-1) is closed in resistance closes chamber (6) less than resistance epimere closes boss (6-1) the internal diameter 0.05mm to 2mm of junction mutually with resistance, hinders the external diameter that closes sheet (4) closes boss (6-1) greater than resistance internal diameter 0.05mm to 3.95mm.
3, destructing safety type syringe is closed in a kind of resistance according to claim 1, it is characterized in that: the airtight location division (4-1) that sheet (4) is closed in resistance is convex column, piston (5) be the matrix through hole in conjunction with location division (5-1).
4, destructing safety type syringe is closed in a kind of resistance according to claim 3, it is characterized in that: on the roof of piston (5) inwall, Yao Bi, diapire, respectively be provided with air drain (5-2), (5-3), (5-4), each air drain formation air channel that is connected, the conduct of this air channel and piston (5) is in conjunction with the matrix through hole of location division (5-1) the formation current path that is connected.
5, destructing safety type syringe is closed in a kind of resistance according to claim 1, it is characterized in that: the airtight location division (4-1) that sheet (4) is closed in resistance is concave hole, piston (5) be convex column in conjunction with location division (5-1).
6, destructing safety type syringe is closed in a kind of resistance according to claim 5, it is characterized in that: be provided with axially extending bore (5-1-1) at the top of piston (5) and as on the convex column in conjunction with location division (5-1).
7, destructing safety type syringe is closed in a kind of resistance according to claim 1, it is characterized in that: on the head (2-1) of core bar (2) and cervical region (2-2), be provided with an axial air channel (2-1-1) until cervical region (2-2) root, on the top flat (2-3-1) of shaft (2-3), be provided with horizontal communication ditch (2-3-3), axially air channel (2-1-1) the formation current path that is connected with horizontal communication ditch (2-3-3).
8, destructing safety type syringe is closed in a kind of resistance according to claim 1, it is characterized in that: this syringe also has entry needle (7), entry needle (7) has needle tubing (7-1), connecting portion (7-2) needle stand (7-3), the needle stand (7-3) of entry needle (7) and conehead (1) hot melt or be adhesively fixed.
9, destructing safety type syringe is closed in a kind of resistance according to claim 1, it is characterized in that: the inwall at cone head hole (1-1) is provided with the anti-portion (1-2) of disclosing, prevent that disclosing portion (1-2) is provided with delivery hole, delivery hole is the part of cone head hole (1-1), and the sectional area of delivery hole is greater than the sectional area 0.01mm of needle tubing (7-1)
2To 1.5mm
2
10, destructing safety type syringe is closed in a kind of resistance according to claim 1, it is characterized in that: needle tubing 7-1 is by connecting portion 7-2 and bonding being fixed on the conehead 1 of inwall that is arranged on the connecting hole 1-3 on the conehead 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101062967A CN1544104A (en) | 2003-11-14 | 2003-11-14 | Self-damaging safe injector with blocking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101062967A CN1544104A (en) | 2003-11-14 | 2003-11-14 | Self-damaging safe injector with blocking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1544104A true CN1544104A (en) | 2004-11-10 |
Family
ID=34334078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101062967A Pending CN1544104A (en) | 2003-11-14 | 2003-11-14 | Self-damaging safe injector with blocking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1544104A (en) |
-
2003
- 2003-11-14 CN CNA2003101062967A patent/CN1544104A/en active Pending
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