CN1267162C

CN1267162C - Safety syringe

Info

Publication number: CN1267162C
Application number: CN 03149792
Authority: CN
Inventors: 黄平德
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-05
Filing date: 2003-08-05
Publication date: 2006-08-02
Anticipated expiration: 2023-08-05
Also published as: CN1579563A

Abstract

The present invention relates to a safe injector. The present invention is proposed for providing an apparatus for inputting media into a body, which has the advantages of simplified structure, assembling program reduction, easy and quick manufacture and assembly, productivity increase and safe use. The present invention comprises an injecting barrel, a clamping seat unit, a needle head unit and a push rod, wherein the injecting barrel is provided with a barrel part which defines a containing chamber and a beam tube part which is in a bundle shape and is provided with a through hole, and the connecting part of the through hole and the containing chamber forms a butting part; the clamping seat unit is provided with a sleeve barrel member and a sealing member arranged on the sleeve barrel member, the sleeve barrel member is provided with an outer sleeve body and an internal sleeve body with an inner ring surface, and the inner ring surface of the internal sleeve body is provided with a first clamping part and an accommodating part; the needle head unit is provided with a needle holder which is connected and positioned in the sleeve barrel member of the clamping seat unit and a needle body which is fixed in the needle holder; the push rod is provided with a rod part for operation, a piston which is arranged on the end of one side of the rod part and can be sheathed in the containing chamber by air seal, and a tenon which is arranged on the outside of the piston and can pass over the first clamping part of the internal sleeve body of the sleeve barrel member of the clamping seat unit in real time to be clamped and positioned in the accommodating part.

Description

Safety injector

Technical field

The invention belongs to medium is imported intravital apparatus, particularly a kind of safety injector.

Background technology

As shown in Figure 1 and Figure 2, the safety injector bag injection tube of commonly using 1, the block base 2 that is installed in injection tube 1 inside, the push rod 4 that is spirally connected localized syringe needle group 3 and can in injection tube 1, passes with block base 2.

Injection tube 1 inside has accommodating chamber 101, communicates with accommodating chamber 101 and is the front aperture 102 of bringing shape together and the shoulder 103 between accommodating chamber 101 and front aperture 102.

Block base 2 has and can support fastening and be positioned at dish seat 201 on the shoulder 103, be convexly set in the cylindrical portion 202 on dish seat 201 1 sides and can be sheathed on O type ring 203 on the cylindrical portion 202 along axis.Cylindrical portion 202 inner ring surfaces one end convexes with flange 204 towards axis, and the other end then is provided with threaded portion 205.

But syringe needle group 3 has the needle body 302 that spiral shell is located at the needle stand 301 on the threaded portion 205 and is fixedly arranged on needle stand 301 inside.

Push rod 4 have can for the operation bar portion 401, be arranged in the bar portion 401 and can be sheathed on the piston 402 in the accommodating chamber 101 airtightly and be located at piston 402 outsides and can cross flange 204 in good time and with block base 2 interconnected tenons 403.

Tenon 403 central authorities offer short slot 404 along axis, and impelling tenon 403 to have can be compressed and to discharge can automatically rebounding open characteristic behind the press power.

When the opening of block base 2 from accommodating chamber 101 is inserted in, and cylindrical portion 202 is inserted in the front aperture 102, dish seat 201 supports and ends when shoulder 103, just can utilize to produce to support in the push rod 4 insertion accommodating chambers 101 and to block base 2 and end, but tenon 403 can not be crossed flange 204, impels block base 2 to obtain to locate; Needle stand 301 with syringe needle group 3 is screwed in threaded portion 205 from front aperture 102 outsides of injection tube 1 again, to finish the operation of assembly.

Though above-mentioned syringe can reach the application target of expection, disappearance below when manufacturing, assembly, existing:

1, block base 2 is two members with O type ring 203, must utilize two device fabrication productions, and needs row assembling again, can increase the cost of making assembly.

2, the volume of O type ring 203 is little; if quite be not easy with artificial assembling; if assemble with machine; then itself has elasticity because of O type ring 203; so when assembly, be easy to produce escape; thereby cause the fraction defective height, in case and O type ring 203 escapes and when blocking only on operating machines, keeping in repair with regard to shutting down.

3, when assembling, must utilize push rod 4 to insert in the accommodating chamber 101 of injection tubes 1 and and support the fastening position block base 2, could make block base 2 and syringe needle group 3 be screwed together smoothly, the operation of assembling quite trouble and production capacity can't promote.

4, utilize O type ring 203 to be set on the block base 2, can make whole member comparatively various, and, must offer short slot 404 in tenon 403 central authorities in order to make tenon 403 cross flange 204 smoothly, also comparatively complicated on the structure.

5, block base 2 is two independent parts that are provided with needle stand 301, must assemble just and can be connected and fixed, and when assembling, block base 2 and needle stand 301 are produced relative rotation, needle stand 301 is screwed in the threaded portion 205 of block base 2 smoothly, in operation, does not want to take the trouble slightly.

Summary of the invention

The purpose of this invention is to provide a kind of simplified structure, reduce the assembly program, make assembly easily, fast, improve production capacity, safety injector safe in utilization.

Clamping base unit, the inlay card that the present invention includes injection tube, is installed in injection tube inside is fixed in the needle unit in the clamping base unit and can be inserted in the push rod of injection tube inside with passing; Injection tube has around axis and defines the tube portion of room and be fixed in a portion one end and is the beam tube portion of bringing shape together, and beam tube portion inside has the perforation that communicates and have smaller aperture due with room, and perforation and room joining place constitute the stop section; Clamping base unit system from the injection tube room to be the rightabout opening injection tube of packing into inner and be positioned on the stop section with perforation, and have sleeve member and be molded directly within sealing member on the sleeve member; Sleeve member has outer sleeve body and the interior body can plasto elastic material than the outer sleeve body tool to make, and interior body and sealing member are one-body molded, and have inner ring surface; Interior body inner ring surface has and is adjacent to room and towards first holding section that axis protrudes and be away from the holding part of axis corresponding to injection tube perforation and relative first holding section; Needle unit has the needle body that connects the needle stand in the sleeve member that is positioned clamping base unit and be fixed in needle stand inside; Push rod system is inserted in the room of injection tube, and it has can be for the bar portion of operation, be arranged at bar portion one side end and can be sheathed on the piston in the room airtightly and be located at the piston outside and can cross body first holding section in the clamping base unit sleeve member and block the tenon that fastening is arranged in holding part.

Wherein:

The outer sleeve body of the sleeve member of clamping base unit is made with the polypropylene material; Interior body is made with the rubber material.

The sealing member of clamping base unit system to be can plasto elastic material making than the outer sleeve body tool, and is fixedly arranged on the outer sleeve body outer peripheral face, and the external diameter of sealing member is greater than the external diameter of the outer peripheral face of pairing outer sleeve body.

The interior body inner ring surface setting of clamping base unit is between first holding section and holding part and be skewed inclination shoulder, is provided with the inclined hole that constitutes around oblique axis in first holding section; Oblique axis and axes intersect acutangulate, and oblique axis and inclination shoulder intersect vertically.

Sealing member system makes with the rubber material.

Body has and is adjacent to room and is located at the guidance part that first holding section, one side is the taper hole shape in the clamping base unit.

The clamping base unit outer sleeve body has for the plastic material circulation so that integrated runner of interior body and sealing member and the back-up block between runner.

Second holding section that body has opposite setting with first holding section and protrudes towards axis in the clamping base unit; And make holding part between first and second holding section; The needle stand of needle unit has to be crossed interior body second holding section of clamping base unit sleeve member and connects the connecting portion that is positioned in its holding part.

A kind of safety injector, it comprises injection tube, be installed in the clamping base unit of injection tube inside, be consolidated in the needle body in the clamping base unit and can be inserted in the push rod of injection tube inside with passing; Injection tube has around axis and defines the tube portion of room and be fixed in a portion one end and is the beam tube portion of bringing shape together, and beam tube portion inside has the perforation that communicates and have smaller aperture due with room, and perforation and room joining place constitute the stop section; Clamping base unit system from the injection tube room to be the rightabout opening injection tube of packing into inner and be positioned on the stop section with perforation, and have sleeve member, be molded directly within on the sleeve member sealing member and with the integrated needle stand of sleeve member; Sleeve member has outer sleeve body and the interior body can plasto elastic material than the outer sleeve body tool to make, and interior body and sealing member are one-body molded, and have inner ring surface; Interior body inner ring surface have be adjacent to room and towards holding section that axis protrudes and corresponding to the injection tube perforation and relatively the holding section be away from the holding part of axis; Needle stand and outer sleeve body are one-body molded; Needle body is fixedly arranged in the clamping base unit needle stand, and can protrude out the sleeve member outside; Push rod system is inserted in the room of injection tube, and it has can be for the bar portion of operation, be arranged at bar portion one side end and can be sheathed on the piston in the room airtightly and be located at the piston outside and can cross body holding section in the clamping base unit sleeve member and block the tenon that fastening is arranged in holding part.

The sealing member of clamping base unit is made with the rubber material.

Body has and is adjacent to room and is located at the guidance part that holding section one side is the taper hole shape in the clamping base unit.

The interior body inner ring surface setting of clamping base unit is between holding section and holding part and be skewed inclination shoulder, is provided with the inclined hole that constitutes around oblique axis in the holding section; Oblique axis and axes intersect acutangulate, and oblique axis and inclination shoulder intersect vertically.

Owing to the present invention includes injection tube, clamping base unit, needle unit and push rod; Injection tube has the tube portion that defines room and is the beam tube portion of bringing shape together and being provided with perforation, and perforation and room joining place constitute the stop section; Clamping base unit has sleeve member and is molded directly within sealing member on the sleeve member; Sleeve member has outer sleeve body and has the interior body of inner ring surface; Interior body and sealing member are one-body molded, and its inner ring surface has first holding section and holding part; Needle unit has the needle body that connects the needle stand in the sleeve member that is positioned clamping base unit and be fixed in needle stand inside; Push rod has can be for the bar portion of operation, be arranged at bar portion one side end and can be sheathed on the piston in the room airtightly and be located at the piston outside and can cross body first holding section in the clamping base unit sleeve member and block the tenon that fastening is arranged in holding part.During assembly, can earlier needle unit and clamping base unit be linked into an integrated entity; Then, in the injection tube of again clamping base unit and needle unit integral body being packed into, when the clamping base unit sealing member supports when terminating on the stop section, then clamping base unit, needle unit can be positioned in the injection tube; At last, an end that only needs again push rod to be provided with piston and tenon inserts in the injection tube, just can finish assembly; Before injector to inject finished and desires to abandon, the operator need only the application of force pass push rod again towards injection tube is inner, made tenon be easy to compel support and cross first holding section and insert in the holding part, and push rod reaches with clamping base unit and is connected purpose; When with push rod during towards the outside pulling of injection tube, push rod can drive clamping base unit and needle unit and contract towards injection tube inside and move, and when needle body was hidden in the injection tube, broken push rod can guarantee that then needle body does not have the danger that exposes and stab human body; Structure is quite simplified, and the making of member, assembly are also quite easy, and can utilize machine automation mechanized operation assembling, reduces the cost of making assembly, and fraction defective is low, and the probability of machine down is also lower, can promote production efficiency.Not only simplified structure, and minimizing assembly program, easy, quick, the raising production capacity, safe in utilization of manufacturing assembly, thus reach purpose of the present invention.

Description of drawings

Fig. 1, safety injector decomposition texture schematic isometric for commonly using.

Fig. 2, safety injector structural representation cutaway view for commonly using.

Fig. 3, be the embodiment of the invention one decomposition texture schematic sectional view.

Fig. 4, be A-A cutaway view among Fig. 3.

Fig. 5, be the embodiment of the invention one structural representation cutaway view.

Fig. 6, be the embodiment of the invention one operation chart one.

Fig. 7, be the embodiment of the invention one operation chart two.

Fig. 8, be the embodiment of the invention two structural representation cutaway views.

Fig. 9, be the embodiment of the invention two operation charts one.

Figure 10, be the embodiment of the invention three structural representation cutaway views.

Figure 11, be the embodiment of the invention four structural representation cutaway views.

The specific embodiment

Embodiment one

As Fig. 3, Fig. 4, shown in Figure 5, clamping base unit 20, the inlay card that the present invention includes injection tube 10, is installed in injection tube 10 inside is fixed in the needle unit 30 in the clamping base unit 20 and can be inserted in the push rod 40 of injection tube 10 inside with passing.

Injection tube 10 is hollow cylindrical, it has around axis 1L and defines the tube portion 11 of room 111 and be fixed in a portion 11 1 ends and be the beam tube portion 12 of bringing shape together, beam tube portion 12 inside have the perforation 121 that communicates and have smaller aperture due with room 111, and perforation 121 constitutes stop section 13 and annular groove 14 with room 111 joining places.

Clamping base unit 20 is class's hollow columnar, its be from injection tube 10 rooms 111 be rightabout opening injection tube 10 inside of packing into perforation 121, and have sleeve member 21 and straight forming and be fixedly arranged on sealing member 22 on the sleeve member 21.

As shown in Figure 3, Figure 4, sleeve member 21 has with the hard plastic material, the outer sleeve body of making as the polypropylene material that is called for short PP 23 and to be fixedly arranged on outer sleeve body 23 inner and can plasto elastic material with tool, the interior body of making as the rubber material 24.Outer sleeve body 23 has the dish portion 231 terminate on the stop section 13 of can supporting, be convexly set in dish portion 231 1 sides and have pipe portion 232 than the roundlet footpath, be the inner peripheral surface 234 of opposing setting around axis 1L and corresponding to the outer peripheral face 233 of dish portion 231 and with outer peripheral face 233.

Dish portion 231 is provided with the runner 235 of radially extension and the back-up block 236 between runner 235.

Interior body 24 is to extend one-body molded via the conducting of runner 235 inwardly by sealing member 22, and having formed inner ring surface 241 around axis 1L, inner ring surface 241 has first holding section 242 that is adjacent to room 111 and protrudes towards axis 11, be provided with and also towards second holding section 243 that axis 1L protrude opposite with first holding section 242, between first, two holding sections 242, between 243 and be away from the holding part 244 of axis 1L, being formed in first holding section 242 ends shoulder 245 with supporting of holding part 244 joining places and is adjacent to room 111 and is located at the guidance part 246 that first holding section, 242 1 sides are the taper hole shape.

Sealing member 22 and interior body 24 are one-body molded, it is can plasto elastic material make than outer sleeve body 23 tools, directly be poured in the dish portion 231 of outer sleeve body 23 as rubber and be fixedly arranged on outer sleeve body 23 outer peripheral faces 233, and utilize runner 235 conductings and can produce preferable consolidation effect, and utilize back-up block 236 can make interior body 24 have preferred positioning with dish portion 231, interior body 24.Its outer portion can be convexly set on the outer peripheral face 233, and internal ring portion then links into an integrated entity with interior body 24, and the external diameter 1D of sealing member 22 is greater than the external diameter 1d of the outer peripheral face 233 of pairing outer sleeve body 23.

Needle unit 30 has needle stand 31, be fixedly arranged on the needle body 32 of needle stand 31 inside and be sheathed on the needle stand 31 and can be located at the lid 33 of needle body 32 outsides.

Needle stand 31 outer peripheral faces have can insert injection tube 10 beam tube portions, 12 perforations 121 and cross in clamping base unit 20 sleeve members 21 bodies 24 second holding sections 243 and connect the connecting portion 311 that is positioned in its holding part 244 and can support and terminate on clamping base unit 20 sleeve members 21 outer sleeve bodies 23 pipe portions 232 outer faces and can support for lid 33 and end localized snap ring 312.

Push rod 40 is to be inserted in the room 111 of injection tube 10, and it has can be for the bar portion 41 of operation, be arranged at bar portion 41 1 side ends and can be sheathed on the piston 42 in the room 111 airtightly and be located at piston 42 outsides and can cross body 24 first holding sections 242 in clamping base unit 20 sleeve members 21 and the card fastening is arranged in the tenon 43 of holding part 244 in good time.The internal diameter that the minimum outer diameter place of tenon 43 constitutes greater than first holding section 242, and the material characteristic of the interior body 24 of utilization after tenon 43 passes first holding section 242, can reach the firm purpose that is connected with clamping base unit 20.

As shown in Figure 5, during assembly, can be earlier the connecting portion 311 of needle unit 30 be inserted from pipe portion 232 ports of clamping base unit 20, and the material characteristic of the interior body 24 of utilization, make that connecting portion 311 is easy to just can compel support and cross second holding section 243, and needle unit 30 can be linked into an integrated entity with clamping base unit 20.Then, again clamping base unit 20 and the needle unit 30 that has been covered with lid 33 are inserted in and in the injection tube 10 that its integral body packed into from room 111 openings, and make the direction of needle body 32, lid 33 aim at perforation 121, support when terminating on the stop section 13 when sealing member 22 is nested in annular groove 14 inside and dish portion 231, then clamping base unit 20, needle unit 30 can be positioned in the injection tube 10.At last, an end that only needs again push rod 40 is provided with piston 42 and tenon 43 inserts in the room 111, just can finish assembly, and above-mentioned assembly can utilize the machine automation mechanized operation to assemble, and sealing member 22 there is no the anxiety of separating with sleeve member 21.

As shown in Figure 6, before injector to inject finishes and desires to abandon, the operator need only the application of force pass push rod 40 again towards injection tube 10 inside, the material characteristic of body 24 in utilizing, can make tenon 43 be easy to compel to support and cross first holding section 242, and tenon 43 is inserted in the holding part 244, and push rod 40 just reaches with clamping base unit 20 and is connected purpose.Again as shown in Figure 7, when with push rod 40 during towards the outside pulling of injection tube 10, push rod 40 meeting drive clamping base unit 20 and needle unit 30 contract towards injection tube 10 inside and move, when needle body 32, lid 33 have all been hidden in the injection tube 10, broken push rod 40 can guarantee that then needle body 32 does not have the danger that exposes and stab human body.

Therefore, the embodiment of the invention one has the following advantages:

1, sealing member 22 and interior body 24 are one-body molded, and interior body 24 inner straight formings have first holding section 242, second holding section 243 and holding part 244, structure is quite simplified, the making of member, assembly are also quite easy, and the material characteristic of body 24 in utilizing can make tenon 43 quite smooth with the assembling of connecting portion 311 and be connected really.

2, sealing member 22 is molded directly within on the same member with sleeve member 21, utilizes same machine manufacturing, and does not need row assembling again, can reduce the cost of making assembly.

3, sealing member 22 is to be molded directly within on the sleeve member 21, so there is not the problem of assembly, more can save the cost of artificial assembling; and can utilize machine to carry out the operation of whole assembly, then sealing member 22 can not produce escape, and fraction defective is low; the probability of machine down is also lower, can promote production efficiency.

4, when assembling links into an integrated entity clamping base unit 20 and needle unit 30 in advance, clamping base unit 20 and needle unit 30 inserted in the injection tube 10 up to the location again, and the operation of assembling is quite easy, and assembling speed is fast, production capacity can promote widely.

5, sealing member 22 is molded directly within on the sleeve member 21, can simplify member, and utilizes the material characteristic of interior body 24, tenon 43 does not need to offer short slot, also comparatively simple on the structure, and can be on same machine, the same time, finish assembling operation with same operational motion.

6, as shown in Figure 4, outer sleeve body 23 and the back-up block 236 made with the polypropylene material can be used to support interior body 24, the sealing member made from the rubber material 22, the tenon 43 that impels push rod 40 and clamping base unit 20 are carried out when nested, can reach firm combination and the urgent purpose of tightening.

Embodiment two

As shown in Figure 8, the present invention includes injection tube 10, be installed in injection tube 10 inside clamping base unit 20 ', be fixedly arranged on the needle body 30 in the clamping base unit 20 ' and can be inserted in the push rod 40 of injection tube 10 inside with passing.

The interior body 24 ' inner ring surface 241 ' of clamping base unit 20 ' is provided with between between first holding section 242 ' and the holding part 244 ' and be in skewed inclination shoulder 245 ', the first holding section 242 ' and be provided with the inclined hole 247 ' that is constituted around oblique axis 1L '.Oblique axis 1L ' and axis 1L intersect about 20 ° acute angle, and oblique axis 1L ' intersects vertically with inclination shoulder 245 '.

As shown in Figure 9, when push rod 40 utilizes tenon 43 to be connected on the clamping base unit 20 ', setting because of inclined hole 247 ', the internal body 24 ' of tenon 43 meetings produces the effect of one-sided outside extruding, simultaneously, be subjected to the constrained of injection tube 10 because of sealing member 22 ', when operation push rod 40 outside when mobile (can earlier lid 33 be taken off) towards injection tube 10, originally one-sided outside squeezing pressure allays, the material characteristic and the inclined hole 247 ' of body 24 ' in utilizing again, the effect of inclination shoulder 245 ', in the time of can making needle body 32 retraction injection tubes 10 inside of clamping base unit 20 ' and needle unit 30, it is whole can to produce deflection (this moment, inclined hole 427 ' can be out of shape and moulding by tenon 43 by the squeezing action of tenon 43), and needle body 32 tips can be supported terminate on the stop section 13, the push rod 40 that fractures again, can guarantee does not have the danger that exposes to needle body 32.

Embodiment three

As shown in figure 10, the present invention includes injection tube 10, be installed in the clamping base unit 20 of injection tube 10 inside ", be fixedly arranged on clamping base unit 20 " in needle body 30 " and can be inserted in the push rod 40 of injection tube 10 inside with passing.

Clamping base unit 20 " have a sleeve member 21 ", straight forming and be fixedly arranged on sleeve member 21 " on sealing member 22 " and with sleeve member 21 " integrated needle stand 25 ".

Sleeve member 21 " have an outer sleeve body made from the hard plastic material 23 " and be fixedly arranged on outer sleeve body 23 " inner and interior body 24 that can plasto elastic material make with tool ".

Outer sleeve body 23 " have and can support the dish portion 231 terminate on the stop section 13 ", be convexly set in dish portion 231 " side and have pipe portion 232 than the roundlet footpath ", around axis 1L and respective disc portion 231 " outer peripheral face 233 " and with outer peripheral face 233 " be the inner peripheral surface 234 of opposing setting ".Dish portion 231 " radially be preset with runner 235 ".

Interior body 24 " have a formed inner ring surface 241 around axis 1L ", inner ring surface 241 " have a holding section 242 that is adjacent to room 111 and protrudes towards axis 1L ", be located at holding section 242 " side and with respect to holding section 242 " be away from the holding part 244 of axis 1L ".

Sealing member 22 " be to make with the rubber material; and directly be poured in runner 235 " in, and its outer portion can be convexly set in outer peripheral face 233 " on, internal ring portion then with interior body 24 " link into an integrated entity, and sealing member 22 " external diameter greater than pairing outer sleeve body 23 " outer peripheral face 233 " external diameter.

Needle body 30 " be directly to be fixedly arranged on clamping base unit 20 " needle stand 25 " in, and can protrude out to injection tube 10 outsides.

Therefore, the embodiment of the invention three is with sleeve member 21 ", sealing member 22 " and needle stand 25 " make one, not only can reduce the number of components, and can reduce the trouble of manufacturing, assembly; and when assembling only need needle body 30 " be solidly plugged in needle stand 25 " inside just finishes assembling, and is quite easy in operation.And compare with the syringe of commonly using, the syringe needle of commonly using needs to relatively rotate just and can be screwed together with block base, and the present invention has reached the purpose that simplifies member, assembly program really.

Embodiment four

As shown in figure 11, the present invention includes injection tube 10, be installed in injection tube 10 inside clamping base unit 50, be fixedly arranged on the needle body 60 in the clamping base unit 50 and can be inserted in the push rod 40 of injection tube 10 inside with passing.

Clamping base unit 50 have sleeve member, straight forming and be fixedly arranged on the sleeve member sealing member and with the integrated needle stand of sleeve member.

Sleeve member has the outer sleeve body made from the hard plastic material and is fixedly arranged on the inner and interior body 54 that can plasto elastic material make with tool of outer sleeve body.

Outer sleeve body has the dish portion terminate on the stop section of can supporting, be convexly set in dish portion one side and have pipe portion than the roundlet footpath, be the inner peripheral surface of opposing setting around the outer peripheral face of axis and respective disc portion and with outer peripheral face.Dish portion radially is preset with runner.

Interior body 54 has around the formed inner ring surface 541 of axis, inner ring surface 541 has and is adjacent to room and the holding section 542 of protruding towards axis, is located at holding section 542 1 sides and is away from the holding part 544 of axis and between holding section 542 and holding part 533 and be skewed inclination shoulder 545, is provided with the inclined hole 547 that is constituted around oblique axis 1L ' in the holding section 542 with respect to holding section 542.Oblique axis 1L ' and the about 20 ° acute angle of axes intersect, and oblique axis 1L ' intersects vertically with inclination shoulder 545.

Sealing member system makes with the rubber material, and directly is poured in the runner, and its outer portion can be convexly set on the outer peripheral face, and internal ring portion then links into an integrated entity with interior body, and the external diameter of sealing member is greater than the external diameter of the outer peripheral face of pairing outer sleeve body.

Needle body 60 is directly to be fixedly arranged in the needle stand of clamping base unit 50, and can protrude out to the injection tube outside.

When clamping base unit 50 and needle body 60 retraction injection tubes are inner, can guarantee that also needle body 60 does not have the danger that exposes.

Conclude above-mentionedly, safety injector of the present invention system will have plastic flexible sealing part and directly consolidate with sleeve member Form one, not only can reach sealing purpose, and can reach make assembly easily, promote production capacity, be lowered into This effect can reach purpose of the present invention really.

Claims

1, a kind of safety injector, it comprises injection tube, is installed in the clamping base unit of injection tube inside, inlay card is fixed in the needle unit in the clamping base unit and can be inserted in the push rod of injection tube inside with passing; Injection tube has around axis and defines the tube portion of room; Needle unit has needle stand and is fixed in the needle body of needle stand inside; Push rod system is inserted in the room of injection tube, and it has and can and be arranged at bar portion one side end and can be sheathed on piston in the room airtightly for the bar portion of operation; The affixed beam tube portion of bringing shape together that is of injection tube tube portion one end, beam tube portion inside has the perforation that communicates and have smaller aperture due with room, and perforation and room joining place formation stop section; Clamping base unit system from the injection tube room to be the rightabout opening injection tube of packing into inner and be positioned on the stop section with perforation; It is characterized in that described clamping base unit has sleeve member and is molded directly within sealing member on the sleeve member; Sleeve member has outer sleeve body and the interior body can plasto elastic material than the outer sleeve body tool to make, and interior body and sealing member are one-body molded, and have inner ring surface; Interior body inner ring surface has and is adjacent to room and towards first holding section that axis protrudes and be away from the holding part of axis corresponding to injection tube perforation and relative first holding section; The needle stand connection is positioned in the sleeve member of clamping base unit; Push rod has to be located at the piston outside and can to cross body first holding section in the clamping base unit sleeve member and block the tenon that fastening is arranged in holding part.

2, safety injector according to claim 1 is characterized in that the outer sleeve body of the sleeve member of described clamping base unit is made with the polypropylene material; Interior body is made with the rubber material.

3, safety injector according to claim 1, the sealing member system that it is characterized in that described clamping base unit is can plasto elastic material make than the outer sleeve body tool, and be fixedly arranged on the outer sleeve body outer peripheral face, and the external diameter of sealing member is greater than the external diameter of the outer peripheral face of pairing outer sleeve body.

4, according to claim 1 or 3 described safety injectors, the interior body inner ring surface setting that it is characterized in that described clamping base unit is between first holding section and holding part and be skewed inclination shoulder, is provided with the inclined hole that constitutes around oblique axis in first holding section; Oblique axis and axes intersect acutangulate, and oblique axis and inclination shoulder intersect vertically.

5, safety injector according to claim 3 is characterized in that described sealing member is to make with the rubber material.

6,, it is characterized in that body has in the described clamping base unit to be adjacent to room and to be located at the guidance part that first holding section, one side is the taper hole shape according to claim 1 or 3 described safety injectors.

7,, it is characterized in that described clamping base unit outer sleeve body has for the plastic material circulation so that integrated runner of interior body and sealing member and the back-up block between runner according to claim 1 or 3 described safety injectors.

8, safety injector according to claim 1 is characterized in that second holding section that body has opposite setting with first holding section and protrudes towards axis in the described clamping base unit; And make holding part between first and second holding section; The needle stand of needle unit has to be crossed interior body second holding section of clamping base unit sleeve member and connects the connecting portion that is positioned in its holding part.

9, a kind of safety injector, it comprises injection tube, be installed in the clamping base unit of injection tube inside, be consolidated in the needle body in the clamping base unit and can be inserted in the push rod of injection tube inside with passing; Injection tube has around axis and defines the tube portion of room; Push rod system is inserted in the room of injection tube, and it has and can and be arranged at bar portion one side end and can be sheathed on piston in the room airtightly for the bar portion of operation; The affixed beam tube portion of bringing shape together that is of injection tube tube portion one end, beam tube portion inside has the perforation that communicates and have smaller aperture due with room, and perforation and room joining place formation stop section; Clamping base unit system from the injection tube room to be the rightabout opening injection tube of packing into inner and be positioned on the stop section with perforation; It is characterized in that described clamping base unit have sleeve member, be molded directly within on the sleeve member sealing member and with the integrated needle stand of sleeve member; Sleeve member has outer sleeve body and the interior body can plasto elastic material than the outer sleeve body tool to make, and interior body and sealing member are one-body molded, and have inner ring surface; Interior body inner ring surface have be adjacent to room and towards holding section that axis protrudes and corresponding to the injection tube perforation and relatively the holding section be away from the holding part of axis; Needle stand and outer sleeve body are one-body molded; Needle body is fixedly arranged in the clamping base unit needle stand, and can protrude out the sleeve member outside; Push rod has to be located at the piston outside and can to cross body holding section in the clamping base unit sleeve member and block the tenon that fastening is arranged in holding part.

10, safety injector according to claim 9 is characterized in that the outer sleeve body of the sleeve member of described clamping base unit is made with the polypropylene material; Interior body is made with the rubber material.

11, safety injector according to claim 9, the sealing member system that it is characterized in that described clamping base unit is can plasto elastic material make than the outer sleeve body tool, and be fixedly arranged on the outer sleeve body outer peripheral face, and the external diameter of sealing member is greater than the external diameter of the outer peripheral face of pairing outer sleeve body.

12, safety injector according to claim 11 is characterized in that the sealing member of described clamping base unit is made with the rubber material.

13,, it is characterized in that described clamping base unit outer sleeve body has for the plastic material circulation so that integrated runner of interior body and sealing member and the back-up block between runner according to claim 9 or 11 described safety injectors.

14, safety injector according to claim 9 is characterized in that body has in the described clamping base unit to be adjacent to room and to be located at the guidance part that holding section one side is the taper hole shape.

15, safety injector according to claim 9, the interior body inner ring surface setting that it is characterized in that described clamping base unit is between holding section and holding part and be skewed inclination shoulder, is provided with the inclined hole that constitutes around oblique axis in the holding section; Oblique axis and axes intersect acutangulate, and oblique axis and inclination shoulder intersect vertically.