CN2505108Y

CN2505108Y - Syringe with destructor

Info

Publication number: CN2505108Y
Application number: CN 01232248
Authority: CN
Inventors: 李赛玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-25
Filing date: 2001-07-25
Publication date: 2002-08-14
Anticipated expiration: 2011-07-25

Abstract

The utility model provides a syringe, in particular to a syringe with destructor. The utility model provides a needle tube with destructor and intravenous injection needle tube with substitutable needle head and belongs to the medical equipment field. The utility model comprises an ellipse needle tube, a needle rod, a needle base and a needle, wherein, one end of the needle rod is provided with a handle, and the other end is provided with a piston, wherein, the handle is connected with the piston through the rod body; the center of bottom of the needle tube is provided with an assembly hole used to arrange the needle base, the needle base is arranged on the needle tube through a needle base piston on the interior bottom of the needle tube, wherein, an easily breakable structure is arranged on the rod body. The needle tube and a needle cap are integrated as a whole body through molding, and a one-off destructor is arranged. The needle tube has reliable connection and convenient use by the medical staff, thereby being in favor of the medical working, the operation is simple, fast, and capable of effectively preventing the spread of the diseases due to the exposed needle of the needle tube which is used. Additionally, the one-off destructor arranged between the needle tube and the needle cap can destruct or lock most of the components of the needle tube when surgical injection is carried out, thereby definitely preventing the illegal merchants from recycling the used needle tubes, and accomplishing the aim of the one-off usage of the needle tubes.

Description

A kind of novel injector with self-desttruction equipment

Invention field

This utility model relates to medical apparatus and instruments, is a kind of novel injector with self-desttruction equipment.

Background technology

Conventional injector, great majority are made up of syringe, shank and entry needle.Syringe is a cylindrical shape, and pin is sleeved on the overhanging needle adapter of syringe bottom separably.Shank one end has piston, is used for the injection in the tube is passed through tube head, pin, is expelled in the human body; The other end of shank has handle, and there is the outer hand rest of opening the syringe end in addition, when injection by handle and hand rest with the injecting liquid drug in the syringe in human body.There is following defective in use in this syringe:

1, because curative activity is a rigorous job of preventing and curing diseases, prophylactic propagation especially can not be ignored because of contacting to infect with virus direct.But in the society often some undesirable reclaim or collect exhausted disposable syringe for the personal interests of oneself, sell through packing again because existing syringe itself does not have mandatory breaking-up device, the lawless person is had an opportunity to take advantage of.

2, existing syringe is owing to use its pin of back to be positioned on the injector syringe, and syringe needle is exposed easily because of stabbing human body.Particularly stab medical personnel and post processing personnel and infect.

Summary of the invention

The purpose of this utility model is a kind ofly in use just can carry out destructive one by one to its parts and handle, prevent from effectively to be utilized once more and can to make needle retractable to prevent that source of disease from spreading, easy to use and reliable novel injector according to what the existing existing defective of syringe provided.

The purpose of this utility model is to realize by following syringe: a kind of syringe with self-desttruction equipment, and it comprises syringe, shank, shank piston, shank hook, hook cavity volume, needle stand piston and needle stand; The front end of shank has the shank piston; Described syringe is the column of elliptic cross-section; The oval column of the outer wall of shank piston and needle stand piston for matching with the inwall of syringe; The bottom center of syringe has the pilot hole that is used to install needle stand, and needle stand and rear portion are assemblied on the syringe by the hook cavity volume that the is threaded needle stand piston by the syringe inner bottom part with it; The front end of shank passes the rear end of the endoporus of shank piston and the shank that is threaded hook; Shank hook middle part has one makes the shank piston be fastened onto the outstanding disk of shank front end; The front end hook portion of shank hook extend in the cavity of hook cavity volume; Front end and shank piston connection at shank are provided with the destructible device; And between shank hook and hook cavity volume, be provided with self-distruction structure; Has the frangibility structure on the shank body of rod; One column pin medicated cap is located at the front end of syringe and one-body molded with syringe, and the junction is provided with weak destructible device between pin medicated cap and syringe.

The another kind of technical scheme that this utility model adopted is: a kind of syringe with self-desttruction equipment, and it comprises syringe, shank, shank hook, hook cavity volume, needle stand piston, needle stand and pin base fastener; The front end of shank has piston; Described syringe is the column of elliptic cross-section; The oval column of the outer wall of shank piston and needle stand piston for matching with the inwall of syringe; The bottom center of syringe has and is used to the needle stand pilot hole the pilot hole of pin base fastener being installed and being used to install the syringe bottom margin of needle stand; Pin base fastener and rear portion are assemblied on the syringe by the needle stand piston by the hook cavity volume of thread connection with it; Needle stand is located on the hook cavity volume and the pilot hole by needle stand piston edge is assemblied on the needle stand pilot hole of syringe; The front end of shank passes the rear end of the endoporus of shank piston and the shank that is threaded hook; Shank hook middle part has one makes the shank piston be fastened onto the outstanding disk of shank front end; The front end hook portion of shank hook extend in the cavity of hook cavity volume; Front end and shank piston connection at shank are provided with the destructible device; And between shank hook and hook cavity volume, be provided with self-distruction structure; Has the frangibility structure on the shank body of rod; One column pin medicated cap is located at the front end of syringe and one-body molded with syringe, and the junction is provided with weak destructible device between pin medicated cap and syringe.

Since on the shank, between shank and shank piston junction and shank hook and the hook cavity volume, syringe and pin medicated cap junction be respectively equipped with the breaking-up structure, make after this syringe uses, self-destruction immediately, and can not be utilized once more, thereby guaranteed disposable use, safe and reliable.

Description of drawings

Below in conjunction with accompanying drawing to technical scheme further instruction of the present invention:

Fig. 1 is the overall structure sketch map of the syringe of this utility model band self-desttruction equipment;

Fig. 2 is the structural representation of shank, and wherein Fig. 2 a is a front view, and Fig. 2 b is a right view, and Fig. 2 c is a vertical view, and Fig. 2 d is the A-A cutaway view, and 2e is the B-B cutaway view;

Fig. 3 is the structural representation of shank hook, and wherein Fig. 3 a is a front view, and Fig. 3 b is a left view, and Fig. 3 c is a right view, and 3d is a upward view;

Fig. 4 is a shank piston structure sketch map, and wherein Fig. 4 a is a front view, and Fig. 4 b is a left view, and Fig. 4 c is a right view;

Fig. 5 is a needle stand piston structure sketch map, and wherein Fig. 5 a is a front view, and Fig. 5 b is a left view, and Fig. 5 C is a right view;

Fig. 6 is the structural representation of hook cavity volume, and wherein Fig. 6 a is a front view, and Fig. 6 b is a left view, and Fig. 6 c is a right view, and Fig. 6 d is a vertical view, and Fig. 6 e is the A-A cutaway view;

Fig. 7 is the needle stand structural representation, and wherein Fig. 7 a is a front view, and Fig. 7 b is a right view, and Fig. 7 c is a vertical view;

Fig. 8 is the structural representation of syringe and pin medicated cap, and wherein Fig. 8 a is a front view, Fig. 8 b be B-B to view, Fig. 8 c is that A-A is to view;

Fig. 9 is the overall structure figure of the another embodiment of this utility model syringe;

Figure 10 is another structural representation of shank hook, and wherein Figure 10 a is a front view, and Figure 10 b is a left view, and Figure 10 c is a right view, and 10d is a upward view;

Figure 11 is another structural representation of hook cavity volume, and wherein Figure 11 a is a front view, and Figure 11 b is a left view, and Figure 11 c is a right view, and Figure 11 d is the A-A cutaway view, and 11e is a vertical view;

Figure 12 is the overall structure figure of another embodiment of this utility model syringe;

Figure 13 is the structural representation of shank, and wherein Figure 13 a is a front view, and Figure 13 b is a right view, and Figure 13 c is a vertical view, and Figure 13 d is the A-A cutaway view, and 13e is the B-B cutaway view;

Figure 14 is the another kind of structural representation of shank hook, and wherein Figure 14 a is a front view, and Figure 14 b is a left view, and Figure 14 c is a right view, and 14d is a upward view;

Figure 15 is a shank piston structure sketch map, and wherein Figure 15 a is a front view, and Figure 15 b is a left view, and Figure 15 c is a right view;

Figure 16 is a needle stand piston structure sketch map, and wherein Figure 16 a is a front view, and Figure 16 b is a left view, and Figure 16 C is a right view;

Figure 17 links up with the structural representation of cavity volume, and wherein Figure 17 a is a front view, and Figure 17 b is a left view, and Figure 17 c is a right view, and Figure 17 d is a vertical view, and Figure 17 e is the A-A cutaway view;

Figure 18 is the needle stand structural representation, and wherein Figure 18 a is a front view, and Figure 18 b is a right view, and Figure 18 c is a vertical view;

Figure 19 is the structural representation of syringe and pin medicated cap, and wherein Figure 19 a is a front view, Figure 19 b be B-B to view, Figure 19 c is that A-A is to view.

The specific embodiment

Referring to Fig. 1 to Fig. 8, showed a kind of syringe among Fig. 1 with self-desttruction equipment, include syringe 1, shank 2, shank hook 8, hook cavity volume 6 and needle stand 7; One end of shank 2 has handle 21, and the handle two ends have symmetrical flap 29, and the front end of shank 2 has shank piston 3; Described syringe 1 is the column of elliptic cross-section; The oval column of the outer wall of shank piston 3 and needle stand piston 4 for matching with the inwall of syringe 1; The bottom center of syringe 1 has the pilot hole 13 that is used to install needle stand 7, and it is conical; Needle stand 7 and rear portion are assemblied on the syringe 1 by the hook cavity volume 6 that the is threaded needle stand piston 4 by the syringe inner bottom part with it; The front end of shank 2 passes the rear end of the endoporus of shank piston 3 and the shank that is threaded hook 8; Shank is linked up with 8 middle parts and is had one and make shank piston 3 be fastened onto the outstanding disk 82 of shank front end; Shank piston 3 front ends are useful on the groove of the disk 82 that holds hook 8; The front end hook portion of shank hook 8 extend in the cavity of hook cavity volume 6; Front end and shank piston 3 connections at shank 2 are provided with destructible device 26; And be provided with self-distruction structure at

shank hook

8 and 6 of cavity volumes of hook; Have frangibility structure 23 on the shank body of rod 22, the V font groove easy to break that this easy folded structure 23 is offered for the suitable position at body of rod middle part so that syringe fractures after using up, reaches the purpose of destructive protection; One column pin medicated cap 16 is located at the front end of syringe and one-body molded with syringe 1, and the junction is provided with weak destructible device 17 between pin medicated cap and syringe; Use preceding with its destruction, to reach disposable application target.

Fig. 2 has showed the structure of shank 2, and the cross section of the shank body of rod 22 is " ten " font structure, the vee of frangibility structure 23 on four faces of the body of rod 22 middle parts " ten " font structure on this body of rod; According to circumstances also can adopt other frangibility structure, the breach or the like that fractures of other shape that the suitable position that is the body of rod as its frangibility structure has.One end of this shank 2 has handle 21, the handle two ends have symmetrical flap 29, its other end has the circular slab 28 that is horizontally placed on the end, circular slab 28 external symmetrys are provided with two half elliptic piston seats 25 in two edges of " ten " word structure, the elliptical shape that the outline of these two piston seats 25 matches for the oval inwall with syringe, this piston seat 25 is a syndeton with two edges of " ten " word structure, thereby constitutes the destructible device 26 on the piston seat 25; When the rotation shank, two junction points of piston seat are promptly destroyed, to reach the purpose of self-destruction.The circular slab 28 front end centers of shank are provided with a screw rod 24 that is connected with the shank hook; At two half elliptic piston seats 25, upward distinguish two small columns 27 of symmetric arrangement, the position of small column 27 is corresponding with circular hole 31 positions on shank piston 3 rear end faces, and small column 27 is used for limiting shank piston 3 and shank 2 positions relation.

Referring to Fig. 3, showed the structure of shank hook 8 among the figure, wherein Fig. 3 a is a front view, and Fig. 3 b is a left view, and Fig. 3 c is a right view, and 3d is a upward view.The end of this shank hook is provided with the female thread 81 that is connected with shank, shank is linked up with the outstanding disk 82 that 8 middle parts have a fastening shank piston 3, after the shank front end passed shank piston 3 and shank hook 8 is connected, outstanding 82 in disk was fixed on the shank shank piston; Shank is linked up with 8 front ends and is had the arrow shaped triangle drag hook 84 that matches with hook cavity volume 6, be provided with the self-destruction clamp 83 of the rhizoma sparganic column that is parallel to centrage in the outside of the front end face of the close drag hook 84 of outstanding disk 82, the cross section of this self-destruction clamp 83 is a triangle, is to be the triangle arrow shaped of pointing to along tangent to periphery.

Referring to Fig. 4, showed the shank structure of piston, this shank piston 3 has can make shank link up with the through hole 32 that 8 rear end cylindricals are inserted in; Shank piston 3 is oval column.The hole 31 of matching with small column 27 on the semicircle shank piston seat 25 is arranged on the shank piston 3.It and shank piston 3 all can adopt thermoplastic elastomer (s) to make; The diameter appropriate section of above-mentioned piston hole 32 is slightly less than the diameter that shank is linked up with 8 rear end cylindricals, can pass through the external force suit, firmly installs with assurance and shank piston 3.

Referring to Fig. 6, the structural representation of having showed the hook cavity volume that matches with above-mentioned shank hook among the figure, this hook cavity volume 6 is ellipticity, its near have in the middle of drag hook one side one identical with the axis projection shape of the triangle drag hook 84 of shank hook 8 and can make triangle drag hook 84 along a direction pass through, intransitable slot 65 behind the half-twist; The long limit of this rectangle perforate 65 just makes triangle drag hook 84 pass through, and minor face then makes the hook portion hanging support of triangle drag hook (84) live and can not rollback, and this rectangle perforate 65 also is the path of medicinal liquid.The front end of hook cavity volume 6 is the nuts 63 that match with needle stand 7 rear end screw threads 71.The inner bolt hole 69 of this nut 63 not only is the path of medicinal liquid, also is the cavity of triangle drag hook 84 rotations.Close drag hook one side at this hook cavity volume 6 has a central column groove 64 around 1/4 circle, the axis projection of this central column groove 64 is arrow shaped, the width of the initiating terminal of this groove 64 is identical with the width of the sagittate self-destruction clamp 83 of shank hook 8, and the groove width of this groove 64 from the initiating terminal to the terminal is and reduces state, and stops with a head 641 of the shape that matches that just holds the self-destruction clamp 83 of arrow column in terminal; The self-destruction clamp 83 of shank hook 8 both matched with the arrow shaped central column groove 64 of hook cavity volume 6; And the shape of the axis projection of this central column groove 64 is the arrow shaped of clockwise sensing.Referring to Fig. 3, the self-destruction clamp 83 of the rhizoma sparganic column of shank hook both matched with the arrow central column groove 64 of hook cavity volume 6, and two kinds have identical sensing, and promptly the arrow of self-destruction clamp 83 is corresponding with arrow central column groove 64.Rotation shank hook, the self-destruction clamp 83 that makes the rhizoma sparganic column slides into the arrow head of the arrow groove that is the shape of decaying from the top of arrow shaped central column groove 64 simultaneously and is stuck in head, and can not retreat, hanging support can not retreat on the two long limits in the hole 64 of hook cavity volume behind triangle drag hook 84 half-twists on the shank hook 8 simultaneously, thereby reaches the purpose of self-destruction.

Referring to Fig. 7, showed the needle stand structure among the figure, the external screw thread 71 of needle stand 7 rear ends is to match with the nut 63 of hook cavity volume 6 front ends, described threaded rear end is the cone-shaped hole of a hollow.The center of described needle stand 7 has through hole 74, and its middle part has a conical needle card 73.Referring to Fig. 5, needle stand piston 4 is oval column again, and its external diameter and syringe 1 internal diameter match, and its center has needle stand hole 41, and this needle stand hole 41 can close fit needle stand 7.Slippage when preventing that needle stand piston 4 from retracting has catch 72 on the needle stand 7.

Again referring to Fig. 1 and Fig. 8, pin medicated cap 16 is formed in one with syringe 1, and the centre has weak destructible device 17, its end have with syringe 1 bottom circular aperture 13 match uncovered, have the circular slotted hole that can hold pin 75 in it.

During the present embodiment assembling, earlier needle stand 7 is utilized after the screw thread close fit by the syringe 1 open rearward end syringe bottom of packing into by needle stand piston 4 and hook cavity volume 8 during assembling, its needle stand 7 cooperates with the central pilot hole 13 of syringe, and needle stand 7 front ends can assemble rustless steel needle body (cooperate with needle stand in advance and produce) when producing.After again shank 2 and shank piston 3 being assembled, make the small column 27 and shank piston small cylindrical opening 31 corresponding matching of shank, pack into until with till the part of hook cavity volume 6 closely contacts by the back end of syringe opening by the screw thread back of combining closely with shank hook 8 again.During use, separate syringe and pin medicated cap (genus is destructive forever to be separated) before using earlier, extract medicinal liquid, liquid medicine injection, " arrowhead-shaped " groove 64 of the just in time tight contact hook of the rhizoma sparganic column self-destruction clamp 83 of shank hook 8 cavity volume after finishing injection; Triangular prism drag hook 84 on the shank hook 8 is just in time by the rectangular opening 65 in the hook cavity volume.The shank dextrorotation is turn 90 degrees, destructible device 26 on the shank is destroyed at this moment, triangular prism drag hook 84 on linking up with this moment just in time tangles two long limits of hook cavity volume 6 rectangular openings 65, simultaneously, triangular prism self-destruction clamp 83 on the hook is by making a forcible entry into " arrow " head with " arrowhead-shaped " groove 64 of movement locus decay gradually in the hook cavity volume 6, to triangular prism self-destruction clamp 83 must not be retreated, triangular prism drag hook 84 on the related feasible hook can not rotate mobile and retreat, to realize self-destroying function.To take out behind the shank, simultaneously with syringe needle, needle stand, the pin piston, the hook cavity volume is drawn in the syringe in the lump, can not accidentally injure operator and recovery personnel to guarantee syringe.After shank is drawn back, shank is rotated counterclockwise,, carries out the minimizing Biohazard Waste to throw off the screw thread that shank is connected with hook.

Referring to Fig. 9, Figure 10 and Figure 11, showed another kind of embodiment among Fig. 9, the difference of this embodiment and a last embodiment is that referring to Figure 10 and Figure 11, present embodiment provides the structure of another kind of shank hook 8 and hook cavity volume 6; The end of this shank hook 8 is provided with the female thread 81 that is connected with shank ", shank is linked up with the outstanding disk 82 that 8 middle parts have a fastening shank piston 3 ", shank is linked up with 8 front ends and is provided with two coniform drag hooks 83 that match with hook cavity volume 6 ".See Figure 11, this hook cavity volume 6 is ellipticity, its centre near drag hook one side has hole 65 "; this hole 65 " be the path of medicinal liquid, this side also is provided with two coniform drag hooks 83 with shank hook 8 " conical bore 64 that cooperates ", this conical bore 64 " the outer end be one less than coniform drag hook 83 " cylinder hole, the inner end of maximum outside diameter be and coniform drag hook 83 " identical coniform of shape; When having injected medicinal liquid, the coniform drag hook 83 of hook " just insert conical bore 64 " in, and rollback again, thus reach the purpose of self-destruction.

Adopt this shank hook 8 and hook cavity volume 6 when assembling, will note, after shank (Fig. 2) and shank piston (Fig. 4) assembled, the small column 27 and shank piston small cylindrical opening 31 corresponding matching of shank, pack into till the part gap with hook cavity volume 6 contacts by the back end of syringe opening again with after shank hook 8 is combined closely by screw thread, can not push the conical bore 64 of hook cavity volume by force "; to avoid the starting pyrometric cone self-desttruction equipment, cause the syringe waste.During use, the coniform drag hook 83 of hook after finishing injection " the just in time tight round taper hole 64 of packing into by force and linking up with cavity volume " in; Locked by force in real time, realize self-destroying function.

Referring to Figure 12, showed another embodiment of the present utility model among the figure, a kind of intravenous injector with self-desttruction equipment, it comprises syringe 1, shank 2, needle stand 67 and pin base fastener 7; The front end of shank has piston 3; It is characterized in that: it also comprises shank hook 8, hook cavity volume 6 and needle stand piston 4; Described syringe 1 is the column of elliptic cross-section; The oval column of the outer wall of shank piston 3 and needle stand piston 4 for matching with the inwall of syringe 1; The bottom center of syringe 1 has and is used to the needle stand pilot hole 12 the pilot hole 13 of pin base fastener 7 being installed and being used to install the syringe bottom margin of needle stand 67; Pin base fastener 7 and rear portion are assemblied on the syringe 1 by needle stand piston 4 by the hook cavity volume 6 of thread connection with it; Hook cavity volume 6 is one-body molded with needle stand 67, and needle stand is assemblied on the needle stand pilot hole 12 of syringe 1 by the pilot hole 42 at needle stand piston 4 edges; The front end of shank 2 passes the rear end of the endoporus of shank piston 3 and the shank that is threaded hook 8; Shank is linked up with 8 middle parts and is had one and make shank piston 3 be fastened onto the outstanding disk 82 of shank front end; The front end hook portion of shank hook 8 extend in the cavity of hook cavity volume 6; Front end and shank piston 3 connections at shank 2 are provided with destructible device 26; And be provided with self-distruction structure at

shank hook

8 and 6 of cavity volumes of hook; Has frangibility structure 23 on the shank body of rod 22; One column pin medicated cap 16 is located at the front end of syringe and one-body molded with syringe 1, and the junction is provided with weak destructible device 17 between pin medicated cap and syringe.Use preceding with its destruction, to reach disposable application target.

Referring to Figure 13 to Figure 19, Figure 13 has showed the structure of shank 2, one end of this shank 2 has handle 21, the handle two ends have symmetrical flap 29, its other end has the circular slab 28 that is horizontally placed on the end, circular slab 28 external symmetrys are provided with the piston seat 25 of two half elliptic circles in two edges of " ten " word structure, and the outer rim of these two piston seats 25 is the oval column that the oval inwall with syringe matches; This piston seat 25 is a syndeton with two edges of " ten " word structure, thereby constitutes the destructible device 26 on the piston seat 25; When the rotation shank, two junction points of piston seat are promptly destroyed, to reach the purpose of self-destruction.The circular slab 28 front end centers of shank are provided with a screw rod 24 that is connected with the shank hook; At two half elliptic circular piston seats 25, upward distinguish two pillars 27 of symmetric arrangement, the position of pillar 27 is corresponding with 31 positions, hole on shank piston 3 rear end faces, and pillar 27 is used for limiting shank piston 3 and shank 2 positions relation.

Referring to Figure 13, the cross section of the above-mentioned body of rod is " ten " font structure again, the vee of frangibility structure on four faces of the body of rod 22 middle parts " ten " font structure on this body of rod; According to circumstances also can adopt other frangibility structure, the breach or the like that fractures of other shape that the suitable position that is the body of rod as its frangibility structure has.

Referring to Figure 14, the structure of having showed shank hook 8 among the figure, the end of this shank hook is provided with the female thread 81 that is connected with shank 2, shank is linked up with the outstanding disk 82 that 8 middle parts have a fastening shank piston 3, shank links up with that 8 front ends have and the arrow shaped triangle drag hook 84 that matches of hook cavity volume 6, is provided with a cross section in the outside of the front end face of close the drag hook 84 of outstanding disk 82 and is along the sagittate self-destruction clamp 83 that is parallel to the column of centrage of tangent to periphery sensing.

Referring to Figure 17, Figure 14, hook cavity volume 6 is ellipticity, its centre near drag hook one side has the rectangle perforate 65 identical with the axis projection shape of arrow shaped triangle drag hook 84, this rectangle perforate 65 can make triangle drag hook 84 pass through, the front end of hook cavity volume 6 is the nuts 63 that match with needle stand 7 rear end screw threads 71, the inner bolt hole 69 of this nut 63 is the cavity of triangle drag hook 84 rotations, be provided with integrated needle stand 67 on this hook cavity volume 6, the center of described needle stand 67 has liquid through-hole 68.Close drag hook one side at this hook cavity volume 6 has about 90 ° of central column grooves 64, the axis projection of this central column groove 64 is the arrow shaped of clockwise sensing, and be to its groove width of terminal from starting point and reduce shape, and stop at the arrow head of terminal with a triangle.Referring to Figure 14, the self-destruction clamp 83 of the rhizoma sparganic column of shank hook both matched with the arrow shaped central column groove 64 of hook cavity volume 6.Rotation shank hook, the self-destruction clamp 83 that makes the rhizoma sparganic column slides into the arrow head of the arrow groove that is the shape of decaying from the top of arrow shaped central column groove 64 and is stuck in head, and can not retreat, thereby reaches the purpose of self-destruction.

Referring to Figure 15, showed the shank structure of piston, this shank piston 3 has can make shank link up with the through hole 32 that 8 rear end cylindricals are inserted in; Shank piston 3 is oval column.The hole 31 of matching with pillar 27 on the semicircle shank piston seat 25 is arranged on the shank piston 3.It and shank piston 3 all can adopt thermoplastic elastomer (s) to make; The diameter appropriate section of above-mentioned piston hole 32 is slightly less than the diameter that shank is linked up with 8 rear end cylindricals, can pass through the external force suit, firmly installs with assurance and shank piston 3.

The structure of piston of needle stand shown in Figure 16; Needle stand piston 4 is oval column, and its external diameter and syringe 1 internal diameter match, and its center has needle stand hole clipping 41, these needle stand hole clipping 41 energy close fit pin base fasteners 7, and needle stand piston 4 edges have needle stand hole 42, and this needle stand hole 42 can close fit needle stands 67.

Referring to Figure 12 and Figure 19, pin medicated cap 16 is formed in one with syringe 1, and the centre has weak destructible device 17, and its end has and matches uncoveredly with syringe 1 bottom pilot hole 12, has the circular slotted hole that can hold pin in it.

Referring to Figure 18, pin base fastener 7 one ends for the external screw thread 71 that is connected of nut 63 of hook cavity volume, 4 slippages of needle stand piston have catch 72 on the pin base fastener 7 when preventing to retract pin base fastener 7, front end is conical needle stand clamp 73.

Earlier pin base fastener 7 is utilized after the screw thread close fit by the syringe 1 end opening syringe bottom of packing into by needle stand piston 4 and hook cavity volume 6 during assembling, its pin base fastener cooperates with the central pilot hole 13 of syringe, and medicine liquid channel cooperates with syringe medicine liquid channel pilot hole 12; After shank 2 and shank piston 3 assembled, the small column 27 and shank piston small cylindrical opening 31 corresponding matching of shank were packed into until with till the part of hook cavity volume closely contacts by the back end of syringe opening by the screw thread back of combining closely with shank hook 8 again.During use, the rhizoma sparganic column self-destruction clamp 83 of hook just in time closely contacts the initiating terminal of " arrowhead-shaped " groove 64 of hook cavity volume after finishing injection, and the triangular prism drag hook 84 on the hook is just in time by the slot 65 in the hook cavity volume; The shank dextrorotation is turn 90 degrees, destructible device 26 on the shank is destroyed at this moment, triangular prism drag hook on the shank hook just in time tangles on the two long limits of hook cavity volume rectangular opening, simultaneously, rhizoma sparganic column self-destruction clamp 83 on the shank hook is by making a forcible entry into " arrow " end 641 with " arrowhead-shaped " groove 64 of movement locus decay gradually in the hook cavity volume 6, to triangular prism must not be retreated, the triangular prism drag hook on the related feasible hook can not rotate mobile, to realize self-destroying function.

Claims

1, a kind of syringe with self-desttruction equipment, it comprises syringe (1), shank (2), shank piston (3), needle stand (7) and pin (75); The front end of shank (2) has shank piston (3), and it is characterized in that: it also comprises: shank hook (8), hook cavity volume (6) and needle stand piston (4); Described syringe (1) is the column of elliptic cross-section; The oval column of the outer wall of shank piston (3) and needle stand piston (4) for matching with the inwall of syringe (1); The bottom center of syringe (1) has the pilot hole (13) that is used to install needle stand (7), and needle stand (7) and rear portion are assemblied on the syringe (1) by the hook cavity volume (6) that the is threaded needle stand piston (4) by the syringe inner bottom part with it; The front end of shank (2) passes the rear end of the endoporus of shank piston (3) and the shank that is threaded hook (8); Shank hook (8) middle part has one makes shank piston (3) be fastened onto the outstanding disk (82) of shank front end; The front end hook portion of shank hook (8) extend in the cavity of hook cavity volume (6); Front end and shank piston (3) connection at shank (2) are provided with destructible device (26); And between shank hook (8) and hook cavity volume (6), be provided with self-distruction structure; Has frangibility structure (23) on the shank body of rod (22); One column pin medicated cap (16) is located at the front end of syringe and one-body molded with syringe (1), and the junction is provided with weak destructible device (17) between pin medicated cap and syringe.

2. syringe with self-desttruction equipment, it comprises syringe (1), shank (2), needle stand (67) and pin base fastener (7); The front end of shank has piston (3); It is characterized in that: it also comprises shank hook (8), hook cavity volume (6) and needle stand piston (4); Described syringe (1) is the column of elliptic cross-section; The oval column of the outer wall of shank piston (3) and needle stand piston (4) for matching with the inwall of syringe (1); The bottom center of syringe (1) has the pilot hole (13) that is used to install pin base fastener (7) and is used to install the needle stand pilot hole (12) of the syringe bottom margin of needle stand (67); Pin base fastener (7) and rear portion are assemblied on the syringe (1) by needle stand piston (4) by the hook cavity volume (6) of thread connection with it; Needle stand (67) is located at that hook cavity volume (6) is gone up and the pilot hole (42) by needle stand piston (4) edge is assemblied on the needle stand pilot hole (12) of syringe (1); The front end of shank (2) passes the rear end of the endoporus of shank piston (3) and the shank that is threaded hook (8); Shank hook (8) middle part has one makes shank piston (3) be fastened onto the outstanding disk (82) of shank front end; The front end hook portion of shank hook (8) extend in the cavity of hook cavity volume (6); Front end and shank piston (3) connection at shank (2) are provided with destructible device (26); And between shank hook (8) and hook cavity volume (6), be provided with self-distruction structure; Has frangibility structure (23) on the shank body of rod (22); One column pin medicated cap (16) is located at the front end of syringe and one-body molded with syringe (1), and the junction is provided with weak destructible device (17) between pin medicated cap and syringe.

3. the syringe of band self-desttruction equipment according to claim 1 and 2, it is characterized in that: the cross section of the above-mentioned body of rod is for " ten " font structure, on this body of rod frangibility structure (23) on four faces of the body of rod (22) middle part " ten " word structure V-shaped groove or on cross section, have perforate; Its area is the 30%-80% of body of rod cross-sectional area; The described shank body of rod (22) front end has the plate (28) that is horizontally placed on the end, plate (28) external symmetry is provided with the half elliptic piston seat (25) that elliptical wall matches in two outlines and the syringe (1) in two opposite side edges of " ten " word structure, this piston seat (25) is a syndeton with two edges of " ten " word structure, thereby constitutes the destructible device (26) on the piston seat (25); Be provided with two alignment pins (27) on two half elliptic piston seats (25), shank piston (3) rear end face is provided with and alignment pin (27) corresponding positioning hole (31).

4. the syringe of band self-desttruction equipment according to claim 1 and 2 is characterized in that:

Described shank hook (8) front end has the triangle drag hook (84) that matches with hook cavity volume (6), is provided with a cross section in the outside of the front end face of the close drag hook (84) of outstanding disk (82) and is along the sagittate self-destruction clamp (83) that is parallel to the column of centrage of tangent to periphery sensing;

The outer wall of described hook cavity volume (6) is oval column with the inwall of needle stand piston (4) and cooperates, its near have in the middle of drag hook one side one identical with the axis projection shape of the triangle drag hook (84) of shank hook (8) and can make triangle drag hook (84) along a direction by, revolve turn 90 degrees after intransitable slot (65); This slot (65) also is the path of medicinal liquid; The front end of hook cavity volume (6) is provided with the inner bolt hole (69) that connects needle stand, double as medicinal liquid path and triangle drag hook (84) rotation cavity; Close drag hook one side at this hook cavity volume (6) has a central column groove (64) around 90 degree, the axis projection of this central column groove (64) is arrow shaped, the width of the initiating terminal of this groove (64) is identical with the width of the sagittate self-destruction clamp (83) of shank hook (8), and the groove width of this groove (64) from the initiating terminal to the terminal is and reduces state, and stops with a head (641) of the shape that matches that just holds the self-destruction clamp (83) of arrow column in terminal; The self-destruction clamp (83) of shank hook (8) both matched with the arrow shaped central column groove (64) of hook cavity volume (6).

5. the syringe of band self-desttruction equipment according to claim 3 is characterized in that:

6. the syringe of band self-desttruction equipment according to claim 1 and 2 is characterized in that,

Described shank hook (8) front end has the triangle drag hook that matches with hook cavity volume (6) (84 "), is provided with two coniform self-destruction drag hooks (83 ") on the front end face of the close drag hook of giving prominence to disk (82 ") (84 ");

The outer wall of described hook cavity volume (6) is oval column with the inwall of needle stand piston (4) and cooperates, its near have in the middle of drag hook one side one identical with the axis projection shape of the triangle drag hook of shank hook (8) (84 ") and can make triangle drag hook (84 ") along a direction by, revolve turn 90 degrees after intransitable slot (65 "); This slot (65 ") also be the path of medicinal liquid; The front end of hook cavity volume (6) is provided with the inner bolt hole that connects needle stand, double as medicinal liquid path and triangle drag hook (84 ") rotation cavity (69 "); The rear end face of hook cavity volume (6) is provided with two and links up with the conical bore that the coniform self-destruction drag hook (83 ") of (8) cooperates (64 ") with shank; The outer end of this conical bore (64 ") is a cylinder hole less than coniform drag hook (83 ") maximum outside diameter, inner end for identical with coniform self-destruction drag hook (83 ") shape coniform.

7. the syringe of band self-desttruction equipment according to claim 3 is characterized in that,

8. the syringe of band self-desttruction equipment according to claim 2 is characterized in that, the described needle stand (67) that is located on the hook cavity volume (6) is one-body molded with hook cavity volume (6).

9. the syringe of band self-desttruction equipment according to claim 1 and 2 is characterized in that, the pilot hole of described syringe (13) is shape in the form of a truncated cone.