CN101088570A

CN101088570A - Disposable injector

Info

Publication number: CN101088570A
Application number: CN 200610082837
Authority: CN
Inventors: 许明正; 黄明敏; 许沛扬
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-13
Filing date: 2006-06-13
Publication date: 2007-12-19
Anticipated expiration: 2026-06-13
Also published as: CN100553699C

Abstract

The disposable injector includes one cylinder, one needle assembly, one medicine tube inside the cylinder and one pushing unit for pushing medicine liquid and the medicine tube. The needle assembly possesses one locating unit inside the cylinder, one ring seat between the locating unit and the outlet of the cylinder, one needle penetrating the ring seat and extending beyond the cylinder, and one elastic element between the ring seat and the outlet of the cylinder. The pushing unit can push medicine liquid for injection. After finishing injection, the medicine tube is pushed for the locating unit to move toward the outlet of the cylinder so as to release the location to the ring seat, and the elastic element is started to push the ring seat, so that the needle and the medicine tube are hidden inside the cylinder and the pushing unit is withdrawn simultaneously. The present invention has capacity of simplifying injection operation and raised injection safety.

Description

Disposable injection syringe

Technical field

The present invention relates to a kind of syringe, particularly relate to a kind of medicinal liquid that includes in advance, have and to simplify clinical treatment injectable drug treatment operation routine, and can promote the disposable injection syringe of injection operation safety effect.

Background technology

See also Fig. 1, shown in Figure 2, Fig. 1 is a cutaway view of No. 6229055 cases of explanation U.S. Pat, and Fig. 2 is the cutaway view that a push rod is moved to the injection stroke terminal point in No. 6229055 cases of explanation U.S. Pat.With No. 6229055 cases of U.S. Pat is example, and this syringe 9 mainly includes a syringe 91, positioning piece 92, a needle stand 93, a needle body 94, a flexible member 95, a cartridge case 96, a push rod 97, an elastomer 98 and a collar 99.This syringe 91 has a reverse arrival end 911 and a port of export 912.This keeper 92 is that detachable liftoff fixing is in this syringe 91 and contiguous this port of export 912.This needle stand 93 is spacing 92 of these syringe 91 arrival ends 912 and this keepers.This needle body 94 is fixed with this needle stand 93, and has a connection end 941 that is set in this syringe 91, and passes a cutting tip 942 of these syringe 91 ports of export 912.This flexible member 95 is to be resisted against between these syringe 91 ports of export 912 and this needle stand 93.This cartridge case 96 is to be contained in this syringe 91, and has towards an open end 961 of this arrival end 911, towards a blind end 962 of this port of export 912, reaches a closure member 963 of this blind end 962 of sealing.This push rod 97 has and is set in pipeline section 971 in one in this cartridge case 96, and around pipeline section in this 971 and this cartridge case 96 and be set in a outer segment 972 in this syringe 91.This elastomer 98 is that detachable liftoff sealing should interior pipeline section 971 after making up with this ring set 99.

See also Fig. 2, shown in Figure 3, Fig. 3 is the cutaway view of pumpback one needle body to this push rod in explanation U.S. Pat No. 6229055 cases.Whereby, medical personnel need only plant this cartridge case 96 and these push rod 97 combination backs go in this syringe 91, make this needle body 94 be communicated with end 941 and pierce through this cartridge case 96 closure members 963, and form conducting state with medicinal liquid in this cartridge case 96, push this push rod 97 again along these syringe 91 slippages, just can make pipeline section 971 liquid medicine injection in the passing process in this push rod 97, make medicinal liquid be injected to animal body through this needle body 94 by this cartridge case 96.When this push rod 97 pushes to the injection stroke terminal point, pipeline section 971 can be compeled to support this cartridge case 96 and be pushed this keeper 92 in this push rod 97, simultaneously, this outer segment 972 also can be compeled to this keeper 92, make this keeper 92 break away from this needle stand 93 towards these syringe 91 ports of export, 912 displacements, at this moment, can not can oppositely compel to support sealing part 963 towards this needle stand 93 that these syringe 91 ports of export 912 move, this elastomer 98 breaks away from this cartridge case 96 blind ends 962 and this ring set 99 respectively, and starting this flexible member 95, the flexible member 95 after bullet is opened pushes these needle stands 93, this needle body 94, sealing part 963 slides onto along pipeline section 971 in this push rod 97 with this elastomer 98 and is hidden in this push rod 97.

Only, though this syringe 9 can pumpback and hidden this needle body 94, the injury of exempting the daily use syringe cylinder of medical personnel is with frightened, but still has following disappearance when reality is used and extremely to be solved:

1, generally speaking, use includes the syringe of medicinal liquid, main purpose is to simplify in the clinical operation to extract liquid medicine injection in the medicinal cupping in advance with syringe cylinder, the process of injecting again, except can simplifying the medical procedures program, also can avoid being equipped with and taking place in the medicine process to pollute or situations such as pinprick extracting medicinal liquid etc. with syringe, but, the cartridge case 96 of this syringe 9 can not directly be contained in this syringe 91, otherwise just have the situation that this needle body 94 pierces through these cartridge case 96 closure members 963, therefore, this cartridge case 96 must separate packing with this syringe 9, when to be used, after earlier this cartridge case 96 and this push rod 97 being made up, be assembled into again in this syringe 91, obviously, the action that this syringe 9 just will extract medicinal liquid changes to the action that is assembled into cartridge case 96, does not really reach the operation sequence of simplifying the treatment of clinical treatment injectable drug.

2, owing to this needle body 94 after using is that pumpback is hidden in the interior pipeline section 971 of this push rod 97 with this needle stand 93, therefore, before starting this flexible member 95, must remove positioning relation, the sealing part 963 and this cartridge case 92 of this keeper 92 and this needle stand 93 synchronously, and the positioning relation of this elastomer 98, this collar 99 and this cartridge case 96, not only critical components is more but also structure is complicated, thereby forms the puzzlement of making and using.

This shows that above-mentioned conventional injector obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of disposable injection syringe of new structure, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.

Because the defective that above-mentioned conventional injector exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and Professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of disposable injection syringe of new structure, can improve general conventional injector, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.

Summary of the invention

The objective of the invention is to, overcome the defective that conventional injector exists, and provide a kind of disposable injection syringe of new structure, technical problem to be solved is to make it have the operation routine that can simplify the treatment of clinical treatment injectable drug, and the effect that can promote the injection operation safety, thereby be suitable for practicality more.

The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of disposable injection syringe that the present invention proposes, it comprises: a syringe, have a tube wall that centers on an axis and define a duct, and this tube wall has a reverse arrival end and a port of export; One pin group, have positioning piece, a ring seat, a needle body and a flexible member, this keeper is to fix in this syringe duct, this ring seat is spacing between this syringe port of export and this keeper, this needle body is to pass this ring seat, and have a conduction terminal that is set in this syringe duct, and and passing a cutting tip of this syringe port of export, this flexible member has respectively against an abutment end and of this syringe port of export and this ring seat and bounces up end; One cartridge case is to be contained in this syringe duct, and displacement between a second position of a primary importance of being close to this syringe port of export and contiguous this syringe arrival end, is to be equipped with liquid medicine injection in this cartridge case, and has a gas seal member of pushing medicinal liquid; An and pushing piece, be partly to place in this cartridge case by this syringe arrival end, and engage interlock with this gas seal member, and has a central siphon, and and the mutual axostylus axostyle that stretches in the mutual socket fixing of this central siphon back, this pushing piece is to push this gas seal member to inject the medicinal liquid in this cartridge case, and when the injection stroke terminal point, push this cartridge case and pass this keeper towards this syringe port of export displacement, and remove the fixing positioning relation of this keeper and this ring seat, and this flexible member of startup, and the fixing of removing this central siphon and this axostylus axostyle synchronously concerns, the part axostylus axostyle is received in this central siphon, and the flexible member after bullet is opened pushes this ring seat, this needle body and this cartridge case are moved to this second position.

The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.

Aforesaid disposable injection syringe, wherein said syringe also has a contact pressing piece, this contact pressing piece is arranged on this tube wall of contiguous this syringe port of export, and having a sawtooth portion that is formed on a front end face, this sawtooth portion one presses the position and appears displacement between an injection position of this needle body cutting tip what cover this needle body cutting tip.

Aforesaid disposable injection syringe, wherein said syringe tube wall also has respectively the big caliber Duan Yuyi tubule footpath section in abutting connection with this arrival end and this port of export, and around this tubule footpath section and define a ring pipe section of an annular space, this contact pressing piece be place in this annular space and with this ring pipe section fit, also have and fastener that this tubule footpath section friction contacts.

Aforesaid disposable injection syringe, wherein said syringe also has a flexible member, and this flexible member is to be contained in this annular space and to replace this contact pressing piece to remain on this and press the position.

Aforesaid disposable injection syringe, wherein said syringe also has the two block fins that are formed on these relative two sides of tube wall one outer surface level and contiguous this arrival end, aforesaid block fin be for the finger against, make this pushing piece when this cartridge case intrinsic displacement application of force, keep the steady statue of this syringe.

Aforesaid disposable injection syringe, wherein said pin group also have pin lid, and this pin lid is to be nested with on the tube wall of contiguous this syringe port of export, and has the surrounding wall that ring covers this needle body.

Aforesaid disposable injection syringe, wherein said pin group also have a cork that is contained in this pin lid, and this needle body cutting tip is to be plugged on airtightly in this cork.

Aforesaid disposable injection syringe, wherein said syringe tube wall also have a snap ring that is formed on an inner surface and contiguous this port of export, make this keeper engage the location with this syringe snap ring.

Aforesaid disposable injection syringe, wherein said syringe tube wall also has respectively the big caliber Duan Yuyi tubule footpath section in abutting connection with this arrival end and this port of export, and be formed on a shoulder between this large and small caliber section, this keeper has a perforation that runs through along this axis, this ring seat has the body of external diameter less than this keeper perforation, and is formed on this body one end and a urgent holding parts that is set in this keeper perforation.

Aforesaid disposable injection syringe, wherein said syringe also have around this axis and relatively this shoulder be formed on a gilled rings between this large and small caliber section, this ring seat body is that part is plugged in this gilled rings, and has at least one abutment face that is formed on this body one side face and bounces up end and this syringe gilled rings against this flexible member.

Aforesaid disposable injection syringe, wherein said syringe also have around this axis and relatively this shoulder be formed on the intersegmental gilled rings of this large and small caliber, it is against this ring seat holding parts that this gilled rings and this flexible member bounce up end, this ring seat body is to be plugged in this gilled rings, and has and be formed on the other end and against an abutment face of this syringe port of export.

Aforesaid disposable injection syringe, wherein said syringe also have around this axis and relatively this shoulder be formed on the intersegmental gilled rings of this large and small caliber, this gilled rings is against this ring seat holding parts, this ring seat body is that part is plugged in this gilled rings, and has an abutment face that is formed on a side face and bounces up end against this flexible member.

Aforesaid disposable injection syringe, wherein said ring seat body are that part is plugged in the tubule footpath section of this syringe, and have an abutment face that is formed on this body one side face and bounces up end against this syringe shoulder and this flexible member.

It is against this ring seat holding parts that aforesaid disposable injection syringe, wherein said flexible member bounce up end, and this ring seat body is that part is plugged in the section of this tubule footpath, and has and be formed on the other end and against an abutment face of this syringe port of export.

Aforesaid disposable injection syringe, wherein said syringe also has most fins that are formed on this tube wall one inner surface and contiguous this port of export around this axis, and the keeper of this pin group has a perforation that runs through along this axis, this ring seat has the body of external diameter less than this keeper perforation, and is formed on this body one end and a urgent holding parts that is set in this keeper perforation.

Aforesaid disposable injection syringe, wherein said body are to be plugged between aforementioned fin along this axis portion, and have an abutment face that is formed on this body other end and is resisted against this syringe port of export, make this flexible member bounce up end and are resisted against this ring seat holding parts.

Aforesaid disposable injection syringe, it more includes a protecting cover, and this pushing piece also has this central siphon one rear end of sealing and supplies a wing plate of finger backup, this protecting cover is to be nested with on the tube wall of contiguous this syringe arrival end, and ring covers this pushing piece, and have ring cover this pushing piece a surrounding wall, be formed on this surrounding wall and compel to be against a terrace edge of this syringe arrival end, and most individual ribs that are formed on this surrounding wall one inner surface and rub mutually and contact along parallel this axis direction with this pushing piece wing plate one periphery.

Aforesaid disposable injection syringe, the central siphon of wherein said push rod have an edge clipping that is formed on an inner surface and a contiguous front end, and this axostylus axostyle has a draw-in groove that is formed on a rear end and engages with this central siphon edge clipping, makes this central siphon and this axostylus axostyle be positioned at extended configuration.

Aforesaid disposable injection syringe, wherein said syringe tube wall also has a scrobicular ring that is formed on an inner surface and contiguous this arrival end, this pushing piece also has this central siphon one rear end of sealing and supplies a wing plate of finger backup, this wing plate has a bulge loop that is formed on a periphery, is that the back engages with this syringe scrobicular ring in burying this syringe tube wall.

Aforesaid disposable injection syringe, wherein said cartridge case has around this axis and defines a ring wall of a chamber, be filled with liquid medicine injection in this chamber, this ring wall has and is formed on a front end and towards an open end of this syringe arrival end, makes this pushing piece pass this open end and gos deep into this chamber.

Aforesaid disposable injection syringe, the central siphon of wherein said pushing piece also has a retaining edge that is formed on an outer surface and contiguous this front end, this retaining edge is to compel to support this cartridge case open end when this pushing piece is moved to the injection stroke terminal point, make this cartridge case be subjected to this retaining edge pushing and withstanding and pass this keeper to this syringe port of export direction displacement and discharge this ring seat, make this cartridge case be hampered by this syringe simultaneously and oppositely push this axostylus axostyle, force the draw-in groove of this axostylus axostyle to break away from the edge clipping of this central siphon, and partly be received in this central siphon.

Aforesaid disposable injection syringe, wherein said cartridge case also have the baffle ring in abutting connection with this open end, and this baffle ring is for stopping that this gas seal member is come off by this open end, and lean mutually with this central siphon retaining edge.

Aforesaid disposable injection syringe, wherein said cartridge case gas seal member are to fix with this baffle ring.

Aforesaid disposable injection syringe, wherein said cartridge case also have the position limiting convex ring of shape in an inner surface and contiguous this open end, and this gas seal member is to be hampered by this position limiting convex ring and the position that is positioned at contiguous this open end.

Aforesaid disposable injection syringe, wherein said needle body is to place to anchor on this ring seat, and this cartridge case also has and is formed on the other end and towards an opening of this syringe port of export, and a closure member of this opening of sealing, this needle body conduction terminal is to pierce through this closure member when this cartridge case is positioned at this primary importance.

Aforesaid disposable injection syringe, wherein said closure member have and are formed on an end face and towards a groove of this ring seat, this groove is this ring seat of clamping.

Aforesaid disposable injection syringe, the closure member of wherein said cartridge case also have a ring edge that is formed on this end face and is resisted against this opening, and this ring edge is to compel to support this keeper towards this syringe port of export displacement.

Aforesaid disposable injection syringe, the ring seat of wherein said pin group have relative this cartridge case closure member and form at one end an annulated column, and this cartridge case also has and is formed on this opening and towards an annular groove of this ring seat, this annular groove is to plug together with this ring seat annulated column.

Aforesaid disposable injection syringe, wherein said cartridge case also has and is formed on the other end and towards a Closed End of this syringe port of export, this Closed End is affixed with this needle body conduction terminal, make this needle body be communicated with the chamber of this cartridge case, and after making this needle body cutting tip pass this ring seat, pass this syringe port of export.

Aforesaid disposable injection syringe, the ring seat of wherein said pin group have relative this cartridge case Closed End and form at one end an annulated column, and this cartridge case also has and is formed on this Closed End and towards an annular groove of this ring seat, and this annular groove is that the annulated column with this ring seat plugs together.

Aforesaid disposable injection syringe, wherein said syringe also has one first tube wall and one second tube wall that mutually combines, this pin group is arranged in this first tube wall, and this needle body is to place to anchor on this ring seat, and this cartridge case and this pushing piece are arranged in this second tube wall.

Aforesaid disposable injection syringe, wherein said syringe also has one first end cap and one second end cap, and this syringe first tube wall has a reverse arrival end and one first junction surface, this second tube wall have a reverse port of export and one second junction surface, this first end cap is and this first junction surface fit mutually that this second end cap is and this second junction surface fit.

The present invention compared with prior art has tangible advantage and beneficial effect.As known from the above,, the invention provides a kind of disposable injection syringe, comprise a syringe, a pin group, a cartridge case and a pushing piece for achieving the above object.This syringe has a tube wall that centers on an axis and define a duct, and this tube wall has a reverse arrival end and a port of export.This pin group has positioning piece, a ring seat, a needle body and a flexible member, this keeper is to fix in this syringe duct movablely, this ring seat is spacing between this syringe port of export and this keeper, this needle body is to pass this ring seat, and has a conduction terminal that is set in this syringe duct, and passing a cutting tip of this syringe port of export, this flexible member has respectively against an abutment end and of this syringe port of export and this ring seat and bounces up end.This cartridge case is to be contained in this syringe duct, and displacement between a primary importance of contiguous this syringe port of export and a second position of being close to this syringe arrival end, is can ccontaining liquid medicine injection in this cartridge case, and has a gas seal member of pushing medicinal liquid movablely.This pushing piece is partly to be placed in this cartridge case by this syringe arrival end, and engage interlock with this gas seal member, and has a central siphon, and and the mutual axostylus axostyle that stretches in the mutual socket fixing of this central siphon back, this pushing piece is to push this gas seal member and the interior medicinal liquid of this cartridge case of injection, and when the injection stroke terminal point, push this cartridge case and pass this keeper towards this syringe port of export displacement, and remove the fixing positioning relation of this keeper and this ring seat, and this flexible member of startup, and remove the fixing relation of this central siphon and this axostylus axostyle synchronously, and the part axostylus axostyle is received in this central siphon, the flexible member after bullet is opened pushes this ring seat, this needle body and this cartridge case are moved to this second position.

By technique scheme, disposable injection syringe of the present invention has following advantage at least: special efficacy of the present invention is, this cartridge case is directly to be preset in this syringe, belong to one of element in this syringe, when therefore using, need only open aseptic packaging, just can directly implement the injection for curing operation, and after injection is finished, pumpback synchronously automatically, hide this needle body in this syringe, and can reach simple, quick and safe medical procedures.

In sum, the invention relates to a kind of disposable injection syringe, include a syringe, a pin group, be filled with a medicinal liquid and movable a cartridge case that is contained in this syringe, and a pushing piece that can push medicinal liquid and this cartridge case.This pin group have the positioning piece that is positioned in this syringe, spacing between this keeper and this syringe one port of export a ring seat, pass this ring seat and pass a needle body of this syringe, and be resisted against a flexible member of this ring seat and this syringe port of export.Whereby, this pushing piece can be in the propelling movement process liquid medicine injection, and when the injection stroke terminal point, push this cartridge case and pass this keeper towards this syringe port of export displacement, and remove with the positioning relation of this ring seat and start this flexible member, flexible member after bullet is opened pushes this ring seat, this needle body and this cartridge case and is hidden in this syringe, and this pushing piece of synchronous.The present invention has the operation routine that can simplify the treatment of clinical treatment injectable drug, and can promote the effect of injection operation safety, is very suitable for practicality.The present invention has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and the outstanding effect that has enhancement than conventional injector, thereby being suitable for practicality more, and having the extensive value of industry, really is a new and innovative, progressive, practical new design.

Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of description, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.

Description of drawings

Fig. 1 is a cutaway view of No. 6229055 cases of explanation U.S. Pat.

Fig. 2 is the cutaway view that a push rod is moved to the injection stroke terminal point in No. 6229055 cases of explanation U.S. Pat.

Fig. 3 is the cutaway view of pumpback one needle body to this push rod in explanation U.S. Pat No. 6229055 cases.

Fig. 4 is the view sub-anatomy of disposable injection syringe first preferred embodiment of the present invention.

Fig. 5 is the cutaway view after disposable injection syringe first preferred embodiment combination of the present invention.

Fig. 6 is the part enlarged diagram of Fig. 5.

Fig. 7 is the cutaway view of the situation of a pushing piece liquid medicine injection in this first preferred embodiment of explanation.

Fig. 8 is the cutaway view that this pushing piece is moved to the injection stroke terminal point in this first preferred embodiment of explanation.

Fig. 9 is that this pushing piece is pushed the cutaway view that a cartridge case is moved to a primary importance in this first preferred embodiment of explanation.

Figure 10 is that a flexible member bounces up this cartridge case and is moved to a second position in this first preferred embodiment of explanation, and interlock one needle body is hidden in cutaway view in the syringe synchronously.

Figure 11 is the cutaway view of disposable injection syringe second preferred embodiment of the present invention.

Figure 12 is the cutaway view of disposable injection syringe the 3rd preferred embodiment of the present invention.

Figure 13 is the cutaway view that explanation the 3rd preferred embodiment more includes one contact pressing piece of pain in the time of can alleviating acupuncture.

Figure 14 is that a flexible member bounces up this cartridge case and is moved to a second position in explanation the 3rd preferred embodiment, and interlock one needle body is hidden in cutaway view in the syringe synchronously.

Figure 15 is the cutaway view of explanation disposable injection syringe the 4th preferred embodiment of the present invention.

Figure 16 is the cutaway view of explanation disposable injection syringe the 5th preferred embodiment of the present invention.

Figure 17 is the cutaway view of explanation disposable injection syringe the 6th preferred embodiment of the present invention.

Figure 18 is the cutaway view of disposable injection syringe the 7th preferred embodiment of the present invention.

Figure 19 is the cutaway view of disposable injection syringe the 8th preferred embodiment of the present invention.

Figure 20 is that a flexible member bounces up this cartridge case and is moved to a second position in explanation the 8th preferred embodiment, and interlock one needle body is hidden in cutaway view in the syringe synchronously.

Figure 21 is the cutaway view of disposable injection syringe the 9th preferred embodiment of the present invention.

Figure 22 is the cutaway view of disposable injection syringe the tenth preferred embodiment of the present invention.

Figure 23 is that a flexible member bounces up this cartridge case and is moved to a second position in explanation the tenth preferred embodiment, and interlock one needle body is hidden in cutaway view in the syringe synchronously.

Figure 24 is the cutaway view of disposable injection syringe the 11 preferred embodiment of the present invention.

Figure 25 is the view sub-anatomy of disposable injection syringe the 12 preferred embodiment of the present invention.

Figure 26 is the assembled sectional view of the 12 preferred embodiment.

Figure 27 is the cutaway view of disposable injection syringe the 13 preferred embodiment of the present invention.

Figure 28 is the cutaway view of disposable injection syringe the 14 preferred embodiment of the present invention.

The specific embodiment

Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its specific embodiment of disposable injection syringe, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.

Before the present invention is described in detail, be noted that in the following description content similar elements is to represent with identical label.

Seeing also Fig. 4, Fig. 5 and shown in Figure 6, is respectively the view sub-anatomy of disposable injection syringe first preferred embodiment of the present invention, cutaway view and the part enlarged diagram after the combination.First preferred embodiment of disposable injection syringe of the present invention, it comprises: a syringe 1, a pin group 2, a cartridge case 3, a pushing piece 4, and a protecting cover 5, wherein:

Above-mentioned syringe 1 has the tube wall 12, a gilled rings 13, most individual fin 14 and the two block fins 15 that center on an axis and define a duct 11, wherein:

This tube wall 12, its have a reverse arrival end 121 and a port of export 122, respectively in abutting connection with a big caliber section 123 and the tubule footpath section 124 of this arrival end 121 and this port of export 122, be formed on 123,124 of this large and small caliber sections a shoulder 125, be formed on a scrobicular ring 126 and a stop ring 127 of an inner surface and contiguous this arrival end 121, and be formed on this inner surface and be close to a snap ring 128 of this port of export 122.

This gilled rings 13 is around this axis, and this shoulder 125 is formed between this large and small caliber section 123,124 relatively.

This fin 14 is formed between these tube wall 12 shoulders 125 and this gilled rings 13.

This block fin 15 is formed in these tube wall 12 big relative two sides of caliber section 123 1 outer surface levels and contiguous this arrival end 121, axial two sides of aforementioned block fin 15 can for finger against.

Above-mentioned pin group 2 has positioning piece 21, a ring seat 22, a needle body 23, a flexible member 24 and pin lid 25, wherein:

This keeper 21 is the snap rings 128 that fix in this syringe 1 duct 11 movablely, and this keeper 21 also has a perforation 211 that runs through along this axis.

This ring seat 22, be spacing between this syringe 1 shoulder 125 and this keeper 21, and have external diameter less than 21 perforation 211 of this keeper and be set in this gilled rings 13 and 21 of this keepers a body 221, be formed on these body 221 1 ends and urgently be set in the interior holding parts 222 of this keeper 21 perforation 211, and be formed on this body 221 and be resisted against an abutment face 223 of this gilled rings 13.

This needle body 23 is and these ring seat 22 concrete mutuallies, and has a conduction terminal 231 that is set in this syringe 1 duct 11, and passes a cutting tip 232 of this syringe 1 port of export 122.

This flexible member 24 has respectively to bounce up against an abutment end 241 and of this syringe 1 port of export 122 and these ring seat 22 abutment faces 223 and holds 242.

This pin lid 25 is to be nested with on the big caliber section 123 of contiguous this syringe 1 port of export 122, and has the surrounding wall 251 that ring covers this needle body 23.

Above-mentioned cartridge case 3, be to be contained in this syringe 1 duct 11, and being hampered by this syringe 1 stop ring 127 can't be come off by this arrival end 121, and has around this axis and define a ring wall 32, a baffle ring 33, a gas seal member 34 and a closure member 35 of a chamber 31, wherein:

This chamber 31 is to be filled with medicinal liquid in it.

This ring wall 32, its have form an end and towards an open end 321 of this syringe 1 arrival end 121, be formed on the other end and towards an opening 322 of this syringe 1 port of export 122, and be formed on an inner surface and be respectively adjacent to this open end 321 and locate bulge loop 324 with one with a position limiting convex ring 323 of this opening 322.

This baffle ring 33 is outstanding these ring wall 32 inner surfacies and in abutting connection with this open end 321.

This gas seal member 34, its be contained in this chamber 31 movablely and with these ring wall 32 airtight contacts, and has a spacing scrobicular ring 341 that is formed on an outer surface and engages around this axis with this position limiting convex ring 323, when being full of medicinal liquid in this chamber 31, this gas seal member 34 is to be hampered by this position limiting convex ring 323 and the position that is positioned at contiguous this open end 321, and is hampered by this baffle ring 33 and can't be come off by this open end 321.

This closure member 35, have and be formed on an end face and towards a groove 351 of this ring seat 22, reach a location scrobicular ring 352 that is formed on an outer surface around this axis, making this closure member 35 is behind ccontaining this gas seal member 34, seals this ring wall 32 openings 322 with this location scrobicular ring 352 with these positioning convex ring 324 fixings.

Above-mentioned pushing piece 4 has a central siphon 41, seals this central siphon 41 1 ends and can be for a wing plate 42 of finger backup, and combine with this gas seal member 34 and with these central siphon 41 belled axostylus axostyles 43, wherein:

This central siphon 41 has an edge clipping 411 that is formed on an inner surface and a contiguous front end, and is formed on a retaining edge 412 of an outer surface and contiguous this front end.

This wing plate 42 has a bulge loop 421 that is formed on a periphery, is that the back engages with this syringe 1 scrobicular ring 126 in burying into this syringe 1 tube wall 12.

This axostylus axostyle 43 has a draw-in groove 431 that is formed on a rear end and engages with these central siphon 41 edge clippings 411, makes this central siphon 41 be positioned at extended configuration with this axostylus axostyle 43.

Above-mentioned protecting cover 5, it is to be nested with on the big caliber section 123 of contiguous this syringe 1 arrival end 121, and have ring cover this pushing piece 4 a surrounding wall 51, be formed on this surrounding wall 51 and compel to be against a terrace edge 52 of this syringe 1 arrival end 121, and along parallel this axis direction be formed on these surrounding wall 51 1 inner surfacies and with these pushing piece 4 wing plates 42 bulge loops 421 most individual ribs 53 of contact of friction mutually.Whereby, this protecting cover 5 not only can be avoided external force or this pushing piece 4 of foreign object false touch, and aforementioned rib 53 and these pushing piece 4 wing plates 42 bulge loops 421 formed one first firm points, can cooperate this gas seal member 34 and these position limiting convex ring 323 formed one second firm points, the location status of firm this pushing piece 4, and keep the degree of stability of this cartridge case 3 indirectly.

Seeing also Fig. 5, Fig. 6, shown in Figure 7, is respectively the cutaway view of the situation of cutaway view, part enlarged diagram and a pushing piece liquid medicine injection after disposable injection syringe first preferred embodiment combination of the present invention.When the present invention injects purposes, unload pin lid 25 and protecting cover 5 on this syringe 1 earlier, to appear this needle body 23 and this pushing piece 4, utilize the forefinger of this syringe 1 of clamping and middle finger against aforementioned block fin 15 then, and be in reverse to the direction application of force of this pushing piece 4 at these cartridge case 3 intrinsic displacements, make this syringe 1 keep steady statue, push the wing plate 42 of this pushing piece 4 again with the thumb forward, make this pushing piece 4 towards these syringe port of export 122 direction slippages, just can be by the frictional resistance of this gas seal member 34 with these cartridge case 3 ring walls 32, and already present intrinsic pressure in this cartridge case 3, promote this cartridge case 3 and slide onto along this syringe 1 duct 11 and be hampered by this keeper 21.At this moment, these needle body 23 conduction terminal 231 can pierce through this closure member 35, form conducting state with these cartridge case 3 chambers 31, and as long as continue this pushing piece 4 of pushing along these cartridge case 3 chambers 31 slippages, just can be in the passing process liquid medicine injection, make medicinal liquid be injected to animal body through this needle body 23, finish the injection purposes by this cartridge case 3.

See also Fig. 8, shown in Figure 9, Fig. 8 is the cutaway view that this pushing piece is moved to the injection stroke terminal point in this first preferred embodiment of explanation, and Fig. 9 is that this pushing piece is pushed the cutaway view that a cartridge case is moved to a primary importance in this first preferred embodiment of explanation.When this pushing piece 4 pushes to the injection stroke terminal point, and after finishing the injection purposes, this pushing piece 4 can be resisted against this cartridge case 3 closure members 35 by this gas seal member 34 of interlock, at this moment, the retaining edge 412 of this pushing piece 4 is the baffle rings 33 against this cartridge case 3, therefore, need only continue to push this pushing piece 4, just can at this pushing piece 4 in the process of these syringe 1 port of export 122 displacements, push this cartridge case 3 and promote this keeper 21 towards these syringe 1 port of export 122 direction displacements.

Because these ring seat 22 abutment faces 223 and 13 of this syringe 1 gilled rings are reserved with a minimum gap as start-up space, after startup, be hampered by this gilled rings 13 immediately and can't displacement, therefore, have only this keeper 21 to push with this pushing piece 4, and discharge this ring seat 22 holding parts 222, and direction displacement along these ring seat 22 bodies 221 towards this port of export 122, remove the positioning relation of this keeper 21 and this ring seat 22 and start this flexible member 24, when this keeper 21 is moved to a primary importance that is hampered by this syringe 1 fin 14 with this cartridge case 3, the ring seat 22 that this can't move towards syringe 1 port of export 122 directions again, can engage with the groove 351 of this holding parts 222 with these cartridge case 3 closure members 35, and because the opposition of this syringe 1 gilled rings 13, the draw-in groove 431 that pushes these pushing piece 4 axostylus axostyles 43 breaks away from the edge clipping 411 of this central siphon 41, removes the fixing relation of this central siphon 41 and this axostylus axostyle 43 synchronously.

Seeing also shown in Figure 10ly, is that a flexible member bounces up this cartridge case and is moved to a second position in this first preferred embodiment of explanation, and interlock one needle body is hidden in cutaway view in the syringe synchronously.Whereby, back stretch be opened and be discharged to this flexible member that is activated 24 can by bullet, and hold 242 to be resisted against bouncing up of these ring seat 22 abutment faces 223, promote the second position that this ring seat 22 and this cartridge case 3 are moved to contiguous this syringe 1 arrival end 121, part axostylus axostyle 43 is received in this central siphon 41 and is contraction state, and drive this needle body 23 towards these syringe 1 arrival end 121 direction displacements, and then this ring seat 22 and this needle body 23 be retained in the duct 11 of this syringe 1, make the syringe 1 that abandons to isolate this needle body 23 with this tube wall 12, and can exempt medical personnel behind liquid medicine injection, contact with this needle body 23 because tidying up this pin group 2, cause needle stick injury, the danger of infecting.

What deserves to be mentioned is, when this this keeper 21 of pushing piece 4 passing is moved to the primary importance that is hampered by this syringe 1 fin 14 with this cartridge case 3, the wing plate 42 of this pushing piece 4 be able to be hidden in the big caliber section 123 of this syringe 1 fully, reach with the scrobicular ring 126 of this bulge loop 421 and fasten with this syringe 1, this pushing piece 4 is positioned in this syringe 1, and without any can being exposed outside, and can't be operated again, make this syringe can't be repeated again to use for the position of grasping.

Seeing also shown in Figure 11ly, is the cross-sectional schematic of second preferred embodiment of disposable injection syringe of the present invention.The present invention's second preferred embodiment, itself and this first preferred embodiment is roughly the same, and its difference is:

The gilled rings 13 of this syringe 1 is the holding parts 222 that holds in this ring seat 22, and the end 242 that bounces up of this flexible member 24 then still holds at this abutment face 223.

The closure member 35 of this cartridge case 3 also has a ring edge 353 that is formed on this end face and is resisted against this opening 322.In the present embodiment, this cartridge case 3 also has a baffle ring 36 of detachable liftoff and these ring wall 32 open ends 321 fits.This gas seal member 34 is that detachable liftoff fixing is 36 of this baffle rings, with this cartridge case 3 of indirect fixing.

Whereby, equally can be in the process of these syringe 1 port of export 122 displacements at this pushing piece 4, remove the positioning relation of this keeper 21 and this ring seat 22, this central siphon 41 and this axostylus axostyle 43 synchronously, and start this flexible member 24, make this this ring seat 22 of flexible member 24 promotions and this cartridge case 3 be moved to the second position of contiguous this syringe 1 arrival end 121, and then this ring seat 22 and this needle body 23 be retained in the duct 11 of this syringe 1, make the syringe 1 that abandons isolate these needle bodies 23 with this tube wall 12.

See also Figure 12, shown in Figure 13, Figure 12 is the cutaway view of disposable injection syringe the 3rd preferred embodiment of the present invention, and Figure 13 is the cutaway view that explanation the 3rd preferred embodiment more includes one contact pressing piece of pain in the time of can alleviating acupuncture.The present invention's the 3rd preferred embodiment, itself and this first preferred embodiment is roughly the same, and its difference is:

This syringe 1 is directly to hold 242 abutment faces 223 that hold in this ring seat 22 with this shoulder 125 and bouncing up of this flexible member 24, and body 221 parts of this ring seat 22 are plugged in the tubule footpath section 124.And this syringe 1 also has a contact pressing piece 16.

This tube wall 12 also has contiguous this port of export 122 around this tubule footpath section 124 and define a ring pipe section 129 of an annular space 120.

This contact pressing piece 16 is to place in this annular space 120 movablely, and with this ring pipe section 129 fit mutually, and have a sawtooth portion 161 that is formed on a front end face, and fasteners 162 that rub and contact with this tubule footpath section 124.This sawtooth portion 161 can press position (as shown in figure 12) and appear displacement between the injection position (as shown in figure 13) of these needle body 23 cutting tips 232 at one of outstanding these needle body 23 cutting tips 232.

During liquid medicine injection, be positioned at this contact pressing piece that presses the position 16 can press human body earlier with this sawtooth portion 161 body surface, and be forced to behind body surface, be received in this annular space 120, and be positioned at this injection position, simultaneously, these needle body 23 cutting tips 232 can puncture into human body, make medicinal liquid at this pushing piece 4 in the process of these syringe 1 port of export 122 direction displacements, be injected into human body.That whereby, utilizes that this contact pressing piece 16 produces presses the attention of sense when shifting these needle body 23 cutting tips 232 and piercing through the human muscle and then the sense that eases the pain.

Seeing also shown in Figure 14ly, is that a flexible member bounces up this cartridge case and is moved to a second position in explanation the 3rd preferred embodiment, and interlock one needle body is hidden in cutaway view in the syringe synchronously.At this pushing piece 4 in the process of these syringe 1 port of export 122 direction displacements, can remove the positioning relation of this keeper 21 and this ring seat 22, this central siphon 41 and this axostylus axostyle 43 equally synchronously, and start this flexible member 24, make this this ring seat 22 of flexible member 24 promotions and this cartridge case 3 be moved to the second position of contiguous this syringe 1 arrival end 121, and then this ring seat 22 and this needle body 23 be retained in the duct 11 of this syringe 1, make the syringe 1 that abandons isolate these needle bodies 23 with this tube wall 12.

See also shown in Figure 15, be the explanation disposable injection syringe the 4th preferred embodiment of the present invention cutaway view.The present invention's the 4th preferred embodiment, itself and the 3rd preferred embodiment are roughly the same, and its difference is:

This syringe 1 also has a flexible member 17.This flexible member 17 is to be contained in this annular space 120, and be not subjected to external force to do the time spent, is to replace this contact pressing piece 16 to remain on this and press the position.Whereby, can guarantee this syringe 1 liquid medicine injection before, be earlier to touch human body with this contact pressing piece 16, the purpose of the sense that eases the pain when reaching acupuncture.

See also shown in Figure 16, be the explanation disposable injection syringe the 5th preferred embodiment of the present invention cutaway view.The present invention's the 5th preferred embodiment, itself and the 4th preferred embodiment are roughly the same, and its difference is:

The closure member 35 of this cartridge case 3 also has a ring edge 353 that is formed on this end face and is resisted against this opening 322.And this cartridge case 3 also has a baffle ring 36 of detachable liftoff and these ring wall 32 open ends 321 fits.

Whereby, equally can be in the process of these syringe 1 port of export 122 direction displacements at this pushing piece 4, compel to support this keeper 21 towards these syringe 1 port of export 122 direction displacements with the ring edge 352 of this closure member 35, and then remove this keeper 21 and this ring seat 22 synchronously, the positioning relation of this central siphon 41 and this axostylus axostyle 43, and start this flexible member 24, make this this ring seat 22 of flexible member 24 promotions and this cartridge case 3 be moved to the second position of contiguous this syringe 1 arrival end 121, and then this ring seat 22 and this needle body 23 be retained in the duct 11 of this syringe 1, make the syringe 1 that abandons isolate these needle bodies 23 with this tube wall 12.

See also shown in Figure 17, be the explanation disposable injection syringe the 6th preferred embodiment of the present invention cutaway view.The present invention's the 6th preferred embodiment, itself and the 4th preferred embodiment are roughly the same, and its difference is:

The body 221 of this ring seat 22 is that part is plugged in this syringe 1 tubule footpath section 124, this abutment face 223 is formed in these body 221 other ends and is resisted against this syringe 1 port of export 122, makes this gilled rings 13 and this flexible member 24 bounce up end 242 and is resisted against this ring seat 22 holding parts 222 simultaneously.

Whereby, can at this pushing piece 4 in the process of these syringe 1 port of export 122 direction displacements, this ring seat 22 be retained in the duct 11 of this syringe 1 with this needle body 23 equally, make the syringe 1 that abandons to isolate this needle body 23 with this tube wall 12.

Seeing also shown in Figure 180ly, is the cutaway view of disposable injection syringe the 7th preferred embodiment of the present invention, the present invention's the 7th preferred embodiment, and itself and the 6th preferred embodiment are roughly the same, and its difference is:

This syringe 1 also has most fins 14 that are formed on these tube wall 12 inner surfacies and contiguous this port of export 122 around this axis, the body 221 of this ring seat 22 is to be plugged on 14 of this syringe 1 fins along this axis portion, this abutment face 223 is formed in these body 221 other ends and is resisted against this syringe 1 port of export 122, makes this flexible member 24 that strengthens outside dimension bounce up end 242 and is resisted against this ring seat 22 holding parts 222.

Consult Figure 19, Figure 20 and shown in Figure 21, Figure 19 is the cutaway view of disposable injection syringe the 8th preferred embodiment of the present invention, Figure 20 is that a flexible member bounces up this cartridge case and is moved to a second position in explanation the 8th preferred embodiment, and interlock one needle body is hidden in cutaway view in the syringe synchronously.Figure 21 is the cutaway view of disposable injection syringe the 9th preferred embodiment of the present invention.The present invention's the 8th preferred embodiment and the 9th preferred embodiment, it is roughly the same with the 3rd, first preferred embodiment respectively, and its difference is:

This cartridge case 3 also has and is formed on this opening 322 and towards an annular groove 37 of this ring seat 22.

In Figure 19, Figure 20, the body 221 of this ring seat 22 is that part is plugged in the tubule footpath section 124 of this syringe 1, and this abutment face 223 is to be resisted against this flexible member 24 to bounce up end 242 and this syringe 1 shoulder 125.In Figure 21, this abutment face 223 is to be resisted against this flexible member 24 to bounce up end 242 and this gilled rings 13.This ring seat 22 also has in abutting connection with this holding parts 222 and a reverse annulated column 224 of this body 221, and this annulated column 224 can fasten with these cartridge case 3 annular grooves 37, and promotes the steady statue of this cartridge case 3 in this syringe 1.

Whereby, during use, equally can be in the process of these syringe 1 port of export 122 direction displacements at this pushing piece 4, compel to support this keeper 21 towards these syringe 1 port of export 122 direction displacements, and then remove this keeper 21 and this ring seat 22 synchronously, the positioning relation of this central siphon 41 and this axostylus axostyle 43, and start this flexible member 24, simultaneously, engaging with the annulated column 224 of this ring seat 22 with the annular groove 37 of this cartridge case 3 is one, make this this ring seat 22 of flexible member 24 promotions and this cartridge case 3 be moved to the second position of contiguous this syringe 1 arrival end 121, and then this ring seat 22 and this needle body 23 be retained in the duct 11 of this syringe 1, make the syringe 1 that abandons isolate these needle bodies 23 with this tube wall 12.

See also Figure 22, Figure 23 and shown in Figure 24, Figure 22 is the cutaway view of disposable injection syringe the tenth preferred embodiment of the present invention, Figure 23 is that a flexible member bounces up this cartridge case and is moved to a second position in explanation the tenth preferred embodiment, and interlock one needle body is hidden in cutaway view in the syringe synchronously.Figure 24 is the cutaway view of disposable injection syringe the 11 preferred embodiment of the present invention.The present invention's the tenth preferred embodiment and the 11 preferred embodiment, it is roughly the same with the 9th, the 8th preferred embodiment respectively, and its difference is:

These cartridge case 3 ring walls 32 also have this opening 322 of sealing and towards a Closed End 325 of these syringe 1 port of export 122 directions.This Closed End 325 is and these needle body 231 affixed connections of 23 conduction terminal, make these needle body 23 cutting tips 232 pass this ring seat 22 after, pass this syringe 1 port of export 122.And this baffle ring 36 is just to be nested with in this cartridge case 3 open ends 321 after this gas seal member 34 is inserted by this open end 321, and making this gas seal member 34 be hampered by this baffle ring 36 can't be come off by this open end 321.

This pin group 2 also has corks 26 that are contained in this pin lid 25, and these needle body 23 cutting tips 232 are to be plugged on airtightly in this cork 26, can block medicinal liquid in these cartridge case 3 chambers 31 by these needle body 23 water clocks.

And in Figure 22, Figure 23, this ring seat 22 is to be resisted against this syringe 1 gilled rings 13 with this abutment face 223 to bounce up end 242 with this flexible member 24.In Figure 24, the holding parts 222 of this ring seat 22 and this abutment face 223 are resisted against this syringe 1 gilled rings 13 respectively and bounce up end 242 with this flexible member 24, simultaneously, annulated column 224 on aforementioned ring seat 22 holding parts 222 all can fasten with the annular groove 37 of aforementioned cartridge case 3, can keep the steady statue of aforementioned cartridge case 3.

Whereby, need only unload this pin lid 25 and this protecting cover 5, equally can be in the process of these syringe 1 port of export 122 displacements at this pushing piece 4, compel to support this keeper 21 towards these syringe 1 port of export 122 displacements, and then remove this keeper 21 and this ring seat 22 synchronously, the positioning relation of this central siphon 41 and this axostylus axostyle 43, and start this flexible member 24, make this this ring seat 22 of flexible member 24 promotions and this cartridge case 3 be moved to the second position of contiguous this syringe 1 arrival end 121, and be hidden in this syringe 1 duct 11 with these cartridge case 3 synchronous these needle bodies 23 of interlock, make the syringe 1 that abandons isolate these needle bodies 23 with this tube wall 12.

See also Figure 25 and Figure 26, Figure 27, and shown in Figure 28, Figure 25 is the view sub-anatomy of disposable injection syringe the 12 preferred embodiment of the present invention, Figure 26 is the assembled sectional view of the 12 preferred embodiment.Figure 27 is the cutaway view of disposable injection syringe the 13 preferred embodiment of the present invention.Figure 28 is the cutaway view of disposable injection syringe the 14 preferred embodiment of the present invention.The present invention's the 12 preferred embodiment～the 14 preferred embodiment, it is roughly the same with this first, the 9th, the 4th preferred embodiment respectively, and its difference is:

This syringe 6 has one first tube wall 61 and one second tube wall 62, a gilled rings 63, most individual fin 64, two block fins 65, one first end cap 66 and one second end caps 67 that center on an axis and define a duct 60, wherein:

This first tube wall 61 has a reverse arrival end 611 and one first junction surface 612.

This second tube wall 62, have a reverse port of export 621 and one second junction surface 622, respectively in abutting connection with this second junction surface 622 with a big caliber section 623 of this port of export 621 and a tubule directly sections 624, and be formed on a shoulder 625 between this large and small caliber section 623,624.

This gilled rings 63 is around this axis and this shoulder 625 and being formed between this large and small caliber section 623,624 relatively.

This fin 64 is formed between these second tube wall, 62 shoulders 625 and this gilled rings 63.

This block fin 65 is formed in these relative two sides of first tube wall, 61 1 outer surface levels and contiguous this arrival end 611, axial two sides of aforementioned block fin 65 can for finger against.

This first end cap 66 is and this first junction surface 612 fit mutually.

This second end cap 67 is and this second junction surface 622 fit mutually.

This pin group 2 is arranged in this second tube wall 62, forms a first module;

This cartridge case 3, this pushing piece 4 and this protecting cover 5 are arranged on this first tube wall 61, form Unit one second.This first, second unit is packed respectively, and convenient according to clinical demand, adopt the needle body 23 of different size to implement the injection operation.

During liquid medicine injection of the present invention, need only this first, second end cap 66,67 of first removal, and screw togather first, second junction surface 612,622 of this first,

second tube wall

61,62, the syringe 6 of the formula that just can be combined into one.Whereby, can the identical operations mode implement injection medicament equally, and at this pushing piece 4 in the process of these syringe 6 ports of export 621 displacements, compel to support this keeper 21 towards these syringe 1 port of export 621 direction displacements, and then remove this keeper 21 and this ring seat 22 synchronously, the positioning relation of this central siphon 41 and this axostylus axostyle 43, and start this flexible member 24, make this this ring seat 22 of flexible member 24 promotions and this cartridge case 3 be moved to the second position of contiguous these syringe 6 arrival ends 611, and be hidden in these syringe 6 ducts 60 with these cartridge case 3 synchronous these needle bodies 23 of interlock, make the syringe 6 that abandons isolate these needle bodies 23 with this tube wall 62.

The 12 preferred embodiment～the 14 preferred embodiment can by the variation of this syringe 6, this

flexible member

24 and 22 rest position of this ring seat, reach the purpose of this ring seat 22 of location as aforementioned preferred embodiment equally; Or can dispose a contact pressing piece 16 and a flexible member 17 as shown in figure 28, and can reach the purpose that alleviates painful sense.

According to the above as can be known, disposable injection syringe of the present invention has following advantage and effect:

1, since this needle body 23 and this cartridge case 3 be at this pushing piece 4 in the process of the port of export 122, the 622 direction displacements of this

syringe

1,6, just form conducting state, therefore, the present invention can be contained in this cartridge case 3 in this

syringe

1,6 in advance, make the present invention compared to existing known techniques, can simplify and use preceding the need to extract liquid medicine injection with syringe earlier, or use preceding assembling cartridge case and the syringe earlier of needing, the process of liquid medicine injection could be implemented, and the convenience in the use can be promoted.This cartridge case 3 is directly to be preset in this syringe, belong to one of element in this syringe, when therefore using, need only open aseptic packaging, just can directly implement the injection for curing operation, and after injection is finished, pumpback synchronously automatically, hide this needle body in this syringe 3, and can reach simple, quick and safe medical procedures.

2, needle body 23 of the present invention is directly to be contained in this

syringe

1,6 duct 11, in 61, therefore need only remove this ring seat 22 and this keeper 21, the positioning relation of these pushing piece 4 central siphons 41 and this axostylus axostyle 42, just can start this flexible member 24, obviously, the central siphon 41 of this pushing piece 4 and axostylus axostyle 42 are in the existing known techniques in this push rod 97, outer segment 971,972 with this elastomer 98, this collar 99, not only can simplify element and start needle body pumpback mechanism, and the central siphon 41 of this pushing piece 4 does not have the sticking problem of being stained with this axostylus axostyle 42 when flexible, so the smoothness can significantly promote these needle body 23 pumpbacks the time.

3, the present invention can be after injection, can automatically this needle body 23 be hidden in the duct 11 of this syringe 1 easily, make the syringe 1 that abandons to isolate this needle body 23 with this tube wall 12, can exempt medical personnel behind liquid medicine injection, contact with this needle body 23 because tidying up this pin group 2, cause the danger of needle stick injury, infection, and can promote convenience and safety that clinical treatment uses the back to dispose.

The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.

Claims

1, a kind of disposable injection syringe is characterized in that it comprises:

One syringe has a tube wall that centers on an axis and define a duct, and this tube wall has a reverse arrival end and a port of export;

One pin group, have positioning piece, a ring seat, a needle body and a flexible member, this keeper is to fix in this syringe duct, this ring seat is spacing between this syringe port of export and this keeper, this needle body is to pass this ring seat, and have a conduction terminal that is set in this syringe duct, and and passing a cutting tip of this syringe port of export, this flexible member has respectively against an abutment end and of this syringe port of export and this ring seat and bounces up end;

One cartridge case is to be contained in this syringe duct, and displacement between a second position of a primary importance of being close to this syringe port of export and contiguous this syringe arrival end, is to be equipped with liquid medicine injection in this cartridge case, and has a gas seal member of pushing medicinal liquid; And

One pushing piece, be partly to place in this cartridge case by this syringe arrival end, and engage interlock with this gas seal member, and has a central siphon, and and the mutual axostylus axostyle that stretches in the mutual socket fixing of this central siphon back, this pushing piece is to push this gas seal member to inject the medicinal liquid in this cartridge case, and when the injection stroke terminal point, push this cartridge case and pass this keeper towards this syringe port of export displacement, and remove the fixing positioning relation of this keeper and this ring seat, and start this flexible member, and the fixing of removing this central siphon and this axostylus axostyle synchronously concerns, the part axostylus axostyle is received in this central siphon, and the flexible member after bullet is opened pushes this ring seat, this needle body and this cartridge case are moved to this second position.

2, disposable injection syringe according to claim 1, it is characterized in that wherein said syringe also has a contact pressing piece, this contact pressing piece is arranged on this tube wall of contiguous this syringe port of export, and having a sawtooth portion that is formed on a front end face, this sawtooth portion one presses the position and appears displacement between an injection position of this needle body cutting tip what cover this needle body cutting tip.

3, disposable injection syringe according to claim 2, it is characterized in that wherein said syringe tube wall also has respectively the big caliber Duan Yuyi tubule footpath section in abutting connection with this arrival end and this port of export, and around this tubule footpath section and define a ring pipe section of an annular space, this contact pressing piece be place in this annular space and with this ring pipe section fit, also have and fastener that this tubule footpath section friction contacts.

4, disposable injection syringe according to claim 3 is characterized in that wherein said syringe also has a flexible member, and this flexible member is to be contained in this annular space and to replace this contact pressing piece to remain on this and press the position.

5, disposable injection syringe according to claim 1, it is characterized in that wherein said syringe also has the two block fins that are formed on these relative two sides of tube wall one outer surface level and contiguous this arrival end, aforesaid block fin be for the finger against, make this pushing piece when this cartridge case intrinsic displacement application of force, keep the steady statue of this syringe.

6, disposable injection syringe according to claim 1 is characterized in that wherein said pin group also has pin lid, and this pin lid is to be nested with on the tube wall of contiguous this syringe port of export, and has the surrounding wall that ring covers this needle body.

7, disposable injection syringe according to claim 6 it is characterized in that wherein said pin group also has a cork that is contained in this pin lid, and this needle body cutting tip is to be plugged on airtightly in this cork.

8, disposable injection syringe according to claim 1 is characterized in that wherein said syringe tube wall also has a snap ring that is formed on an inner surface and contiguous this port of export, makes this keeper engage the location with this syringe snap ring.

9, disposable injection syringe according to claim 1, it is characterized in that wherein said syringe tube wall also has respectively the big caliber Duan Yuyi tubule footpath section in abutting connection with this arrival end and this port of export, and be formed on a shoulder between this large and small caliber section, this keeper has a perforation that runs through along this axis, this ring seat has the body of external diameter less than this keeper perforation, and is formed on this body one end and a urgent holding parts that is set in this keeper perforation.

10, disposable injection syringe according to claim 9, it is characterized in that wherein said syringe also have around this axis and relatively this shoulder be formed on the intersegmental gilled rings of this large and small caliber, this ring seat body is that part is plugged in this gilled rings, and has at least one abutment face that is formed on this body one side face and bounces up end and this syringe gilled rings against this flexible member.

11, disposable injection syringe according to claim 9, it is characterized in that wherein said syringe also have around this axis and relatively this shoulder be formed on the intersegmental gilled rings of this large and small caliber, it is against this ring seat holding parts that this gilled rings and this flexible member bounce up end, this ring seat body is to be plugged in this gilled rings, and has and be formed on the other end and against an abutment face of this syringe port of export.

12, disposable injection syringe according to claim 9, it is characterized in that wherein said syringe also have around this axis and relatively this shoulder be formed on the intersegmental gilled rings of this large and small caliber, this gilled rings is against this ring seat holding parts, this ring seat body is that part is plugged in this gilled rings, and has an abutment face that is formed on a side face and bounces up end against this flexible member.

13, disposable injection syringe according to claim 9, it is characterized in that wherein said ring seat body is that part is plugged in the tubule footpath section of this syringe, and have an abutment face that is formed on this body one side face and bounces up end against this syringe shoulder and this flexible member.

14, disposable injection syringe according to claim 9, it is characterized in that it is against this ring seat holding parts that wherein said flexible member bounces up end, and this ring seat body is that part is plugged in the section of this tubule footpath, and has and be formed on the other end and against an abutment face of this syringe port of export.

15, disposable injection syringe according to claim 1, it is characterized in that wherein said syringe also has most fins that are formed on this tube wall one inner surface and contiguous this port of export around this axis, and the keeper of this pin group has a perforation that runs through along this axis, this ring seat has the body of external diameter less than this keeper perforation, and is formed on this body one end and a urgent holding parts that is set in this keeper perforation.

16, disposable injection syringe according to claim 15, it is characterized in that wherein said body is to be plugged between aforementioned fin along this axis portion, and have an abutment face that is formed on this body other end and is resisted against this syringe port of export, make this flexible member bounce up end and be resisted against this ring seat holding parts.

17, disposable injection syringe according to claim 1, it is characterized in that it more includes a protecting cover, and this pushing piece also has this central siphon one rear end of sealing and supplies a wing plate of finger backup, this protecting cover is to be nested with on the tube wall of contiguous this syringe arrival end, and ring covers this pushing piece, and have ring cover this pushing piece a surrounding wall, be formed on this surrounding wall and compel to be against a terrace edge of this syringe arrival end, and most individual ribs that are formed on this surrounding wall one inner surface and rub mutually and contact along parallel this axis direction with this pushing piece wing plate one periphery.

18, disposable injection syringe according to claim 1, the central siphon that it is characterized in that wherein said push rod has an edge clipping that is formed on an inner surface and a contiguous front end, this axostylus axostyle has a draw-in groove that is formed on a rear end and engages with this central siphon edge clipping, makes this central siphon and this axostylus axostyle be positioned at extended configuration.

19, disposable injection syringe according to claim 1, it is characterized in that wherein said syringe tube wall also has a scrobicular ring that is formed on an inner surface and contiguous this arrival end, this pushing piece also has this central siphon one rear end of sealing and supplies a wing plate of finger backup, this wing plate has a bulge loop that is formed on a periphery, is that the back engages with this syringe scrobicular ring in burying this syringe tube wall.

20, disposable injection syringe according to claim 1, it is characterized in that wherein said cartridge case has around this axis and defines a ring wall of a chamber, be filled with liquid medicine injection in this chamber, this ring wall has and is formed on a front end and towards an open end of this syringe arrival end, makes this pushing piece pass this open end and gos deep into this chamber.

21, disposable injection syringe according to claim 20, the central siphon that it is characterized in that wherein said pushing piece also has a retaining edge that is formed on an outer surface and contiguous this front end, this retaining edge is to compel to support this cartridge case open end when this pushing piece is moved to the injection stroke terminal point, make this cartridge case be subjected to this retaining edge pushing and withstanding and pass this keeper to this syringe port of export direction displacement and discharge this ring seat, make this cartridge case be hampered by this syringe simultaneously and oppositely push this axostylus axostyle, force the draw-in groove of this axostylus axostyle to break away from the edge clipping of this central siphon, and partly be received in this central siphon.

22, disposable injection syringe according to claim 21 is characterized in that wherein said cartridge case also has the baffle ring in abutting connection with this open end, and this baffle ring is for stopping that this gas seal member is come off by this open end, and leans mutually with this central siphon retaining edge.

23, disposable injection syringe according to claim 21 is characterized in that wherein said cartridge case gas seal member is to fix with this baffle ring.

24, disposable injection syringe according to claim 21, it is characterized in that wherein said cartridge case also has the position limiting convex ring of shape in an inner surface and contiguous this open end, this gas seal member is to be hampered by this position limiting convex ring and the position that is positioned at contiguous this open end.

25, disposable injection syringe according to claim 20, it is characterized in that wherein said needle body is to place to anchor on this ring seat, and this cartridge case also has and is formed on the other end and towards an opening of this syringe port of export, and a closure member of this opening of sealing, this needle body conduction terminal is to pierce through this closure member when this cartridge case is positioned at this primary importance.

26, disposable injection syringe according to claim 25 is characterized in that wherein said closure member has to be formed on an end face and towards a groove of this ring seat, this groove is this ring seat of clamping.

27, disposable injection syringe according to claim 25 is characterized in that the closure member of wherein said cartridge case also has a ring edge that is formed on this end face and is resisted against this opening, and this ring edge is to compel to support this keeper towards this syringe port of export displacement.

28, disposable injection syringe according to claim 25, the ring seat that it is characterized in that wherein said pin group has this cartridge case closure member formation annulated column at one end relatively, this cartridge case also has and is formed on this opening and towards an annular groove of this ring seat, this annular groove is to plug together with this ring seat annulated column.

29, disposable injection syringe according to claim 20, it is characterized in that wherein said cartridge case also has is formed on the other end and towards a Closed End of this syringe port of export, this Closed End is affixed with this needle body conduction terminal, make this needle body be communicated with the chamber of this cartridge case, and after making this needle body cutting tip pass this ring seat, pass this syringe port of export.

30, disposable injection syringe according to claim 29, the ring seat that it is characterized in that wherein said pin group has this cartridge case Closed End formation annulated column at one end relatively, this cartridge case also has and is formed on this Closed End and towards an annular groove of this ring seat, and this annular groove is that the annulated column with this ring seat plugs together.

31, disposable injection syringe according to claim 25, it is characterized in that wherein said syringe also has one first tube wall and one second tube wall that mutually combines, this pin group is arranged in this first tube wall, and this needle body is to place to anchor on this ring seat, and this cartridge case and this pushing piece are arranged in this second tube wall.

32, disposable injection syringe according to claim 31, it is characterized in that wherein said syringe also has one first end cap and one second end cap, and this syringe first tube wall has a reverse arrival end and one first junction surface, this second tube wall have a reverse port of export and one second junction surface, this first end cap is and this first junction surface fit that this second end cap is and this second junction surface fit.