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CN109908433A - Disposable micro volume high precision safety syringe - Google Patents

Disposable micro volume high precision safety syringe Download PDF

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Publication number
CN109908433A
CN109908433A CN201811480821.4A CN201811480821A CN109908433A CN 109908433 A CN109908433 A CN 109908433A CN 201811480821 A CN201811480821 A CN 201811480821A CN 109908433 A CN109908433 A CN 109908433A
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CN
China
Prior art keywords
needle stand
needle
stack shell
annular
push rod
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Granted
Application number
CN201811480821.4A
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Chinese (zh)
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CN109908433B (en
Inventor
王琳
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Individual
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Individual
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Priority to CN201811480821.4A priority Critical patent/CN109908433B/en
Priority to PCT/CN2019/070546 priority patent/WO2020113758A1/en
Publication of CN109908433A publication Critical patent/CN109908433A/en
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Publication of CN109908433B publication Critical patent/CN109908433B/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The present invention relates to micro high-precision syringes, disposable micro high-precision safety injector, including push rod, rubber plug and stack shell, push rod and rubber plug cooperate to be placed in from stack shell upper end, stack shell lower end is combined with needle body, the lower end of stack shell is equipped with needle stand positioning sleeve, cooperates needle stand in needle stand positioning sleeve, one end of needle body is fixed on needle stand；Push rod drives needle stand rotation pine to move back, while drawing in needle body to stack shell, and is bent needle body and locks in stack shell.By technical solution of the present invention, needle body is fixed on needle stand by setting needle stand, needle stand and rubber plug cooperate, after injection, needle body follows needle stand to drive rubber plug to be returned in stack shell by push rod, and keeps needle body not coaxial with stack shell, to promote pull rod that needle body is made to be bent destruction in stack shell and reach the problem of preventing secondary use again, its is ingenious in design, powerful；The cooperation of rubber plug and needle stand simultaneously, and achieved the purpose that drain air in stack shell.

Description

Disposable micro high-precision safety injector
Technical field
The present invention relates to injector for medical purpose field more particularly to micro high-precision syringes.
Background technique
Injection is the indispensable means of medical procedure, and syringe is the necessary tool of implementing injection.Common injection It includes following four type that device, which generally divides:
1. muscle with syringe: regular size has 1.0ml.；2.5ml.；5.0ml.；1.0ml. waiting.
2. vein with syringe: regular size has 5.0ml.；10ml.；25ml.；50ml.；100ml. waiting.
3. micro high-precision syringe: regular size has 0.3ml.；0.5ml. and 1ml. etc..
4. other: puncturing the syringe etc. of sampling extraction.
Above-mentioned 4 kinds of products are as follows in the safety parsing of the scope of application:
1. muscle with syringe: 1ml and 2.5ml. market have part brags about safety injector selling.
2. vein with syringe: used because scalp acupuncture (having an intravenous drip with intravenous tube) can be connected, do not have at present specially It is being sold for safety injector used for intravenous injection.
3. micro high-precision syringe: for example all kinds of vaccine injections of the wider model of its scope of application, injection of insulin, emergency cardiac care Injection, hypertension first aid injection, human body are lost warm first aid injection, inspection of anaphylactogen etc. and require to be injected using micro high-precision Device, the model demand that has many uses are very big.But reach injection precision to require that elongated stack shell must be taken to design in structure, in cylinder The internal diameter of body inner hole is respectively internal diameter < 3mm. of 0.3ml；Internal diameter < 3.8mm. of 0.5ml；Internal diameter < 5.4mm of 1.0ml；Ability Meet required precision.
Because extremely small in its structure, do not occur the safety injector of micro high-precision syringe art, existing structure also As shown in figure 25, it is formed by combining in structure including push rod 1, rubber plug 2, stack shell 3, needle body 4, needle protecting cover 5, needle body 4 is sticked together In 3 front aperture of stack shell, needle protecting cover 5 is covered；Push rod 1 is combined with rubber plug 2, finally again by the push rod 1 and cylinder with combination rubber plug 2 Body 3 assembles.
And in associated field, be related to safety injector such as Chinese patent CN201510867304.2, the applying date On December 1st, 2015, the patent of invention of on 2 3rd, 2016 entitled safety injectors of date of publication, structure includes needle One end of cylinder, piston and injection needle, syringe is equipped with dispensing end, is arranged by syringe central axis and dispensing end out-of-alignment Syringe needle bending is reached in syringe and prevents secondary use purpose by mode, to solve the problems, such as safety injection, because it need to be outside syringe End setting displacement dispensing end, and non-coaxial dispensing end, are classified as the syringe of vein, are not suitable for micro high-precision syringe.
Summary of the invention
The present invention is directed to the shortcomings that safety defect existing in the prior art, provides the disposable micro for preventing secondary use High-precision safety injector.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals:
Disposable micro high-precision safety injector, including push rod, rubber plug and stack shell, push rod and rubber plug cooperate from stack shell End merging, stack shell lower end are combined with needle body, and the lower end of stack shell is equipped with needle stand positioning sleeve, cooperates needle stand, needle body in needle stand positioning sleeve One end be fixed on needle stand；Push rod drives needle stand rotation pine to move back, while drawing in needle body to stack shell, and be bent needle body lock in In stack shell.Needle body is drawn to stack shell by ingehious design, thus destroy needle body in stack shell, reach prevent it is secondary using mesh 's.
Preferably, rubber plug is made of elastomeric material, center is hollow through circular hole；Push rod passes through the hollow of rubber plug Cooperate above circular hole and needle stand；Stack shell center is hollow through circular hole, and the lower end of stack shell is hollow inner hole.The elasticity of rubber plug Material allows needle body keep out-of-alignment state with stack shell after pulling back, to be conducive to bending.
Preferably, the outer upper side of needle stand is equipped with hollow cylinder, the excircle of hollow cylinder is equipped with protrusion cylinder, Protrusion cylinder is formed to squeeze with the first end face of rubber plug and be contacted；Push rod lower end base is hemispherical endpoint, and hemispherical endpoint is uniform There are four the first convex ribs for distribution；Center hollow hole is equipped with above needle stand, the top in center hollow hole forms path circular hole, path circle The diameter in hole is less than the opposite side axial line distance of four the first convex ribs of push rod hemispherical endpoint；The interior wall in center hollow hole uniformly divides Cloth is parallel to four the second convex ribs of axis, the second convex ribs of the interior wall of the first convex ribs and center hollow hole of hemispherical endpoint It cooperates.
Preferably, being located at below hollow cylinder on the outside of needle stand, it is successively arranged annular flange and protrudes from needle stand two sides Be in 180 ° of protrusion cylindrical body；Needle stand positioning sleeve middle section is equipped with the protrusion massif structure that inner wall corresponds to each other 180 °, protrudes mountain Summit, side slope at 45 ° are formed in body structure, the recess of a vertical axis is formed on other side slope bottom corresponding with summit Opening, summit are used to support the annular flange of needle stand, and recessed openings are used to limit the protrusion cylindrical body of needle stand protrusion two sides, and 45 ° Along the motion profile of protrusion cylindrical body when slope is moved back for needle stand rotation pine, make needle stand towards stack shell internal displacement.
Preferably, annular groove is equipped on the outside of needle stand between hollow cylinder and annular flange, on annular groove It is cased with sealing ring；Sealing ring is made of elastomeric material, and structure is the ring structure of round wires diameter, sealing ring and stack shell it is hollow Inner hole inner wall, which is formed, squeezes contact.
Preferably, push rod lower end is successively arranged cyclic annular diamond shape projective structure and end cylindrical body, set on the cylindrical body of end There is square annular convex rib, hemispherical end point is located at end cylindrical body bottom end；Rubber plug it is hollow through circular-hole internal-wall and push rod Square annular convex rib extrusion fit；Hollow be equipped in circular hole one end cooperates positioning with the cyclic annular diamond shape projective structure of push rod Cyclic annular diamond sunk structure；And be collar flange on the outside of the end, it is class lip-like ring structure on the outside of the other end, and bottom end is the One end face；The inner wall extrusion fit of the hollow hole of the collar flange and class lip-like ring structure and stack shell of rubber plug.Cyclic annular diamond shape is convex Structure is used for location and installation rubber plug in conjunction with cyclic annular diamond sunk structure out, and square annular convex rib runs through for hollow to rubber plug Circular hole opens sealing function, and hemispherical endpoint completes to execute needle stand rotation pine and move back and pull back into inside stack shell to inject.
Preferably, push rod is equipped with round flange；Stack shell upper end inlet forms the protrusion triangle annular for reducing diameter Structure, push rod are matched by round flange with protrusion triangle ring structure.Round flange is outer for preventing rubber plug displacement, together When and stack shell the cooperation of protrusion triangle ring structure as withdrawing needle stand and when needle body prevents and stack shell is detached from.
Preferably, stack shell lower end periphery is equipped with first annular plane and first annular convex ribs；The upper section of needle stand positioning sleeve For stack shell location hole, stack shell location hole is successively arranged the second planar annular, the second annular convex rib and hole inner face under upper, and One planar annular, first annular convex ribs and tapered hollow inner hole respectively with the second planar annular, the second annular convex rib and hole inner end Make to agree in face.
Preferably, the lower section of needle stand positioning sleeve is needle stand central plug location hole, pass through in needle stand below needle stand positioning sleeve Heart plug location hole is fixed with needle stand central plug, and the center of needle stand central plug is axis location hole；Needle body passes through needle stand central plug Axis location hole is pierced by needle stand central plug.
Preferably, needle stand central plug location hole be successively arranged from top to bottom third annular convex rib, third planar annular and It is third end face positioned at bottom end；Fourth annular convex ribs, fourth annular plane and positioning end face are successively arranged on the outside of needle stand central plug； Third annular convex rib and third planar annular agree with fourth annular convex ribs, fourth annular plane work respectively, third end face and fixed Position end face is engaged.
Preferably, push rod upper end is equipped with rectangular handle.Square configuration is designed to, except medicament extraction and injection operation purposes Outside, more increase the convenience that operation needle stand rotation pine moves back and pulls back after completing injection.
Preferably, the needle body other end is pierced by needle stand central plug and is cased with needle protecting cover；It is flange end that needle stand, which positions set upper side, The lower outer of flange end and needle stand positioning sleeve forms second end face, has four to put down on the circumference of the lower outer of needle stand positioning sleeve Row is in the third convex ribs of central axis；The center of needle protecting cover is center cylindrical cavity, and the top of needle protecting cover is the 5th end face；Center cylindrical cavity Inner hole wall and the third convex ribs of needle stand positioning sleeve cooperate, and the second end face of the 5th end face and needle stand positioning sleeve cooperates.It adds Needle protecting cover, the safety for the needle body further protected.
Preferably, the 5th annular convex rib is formed at the top of needle protecting cover center cylindrical cavity, on the third convex ribs of needle stand positioning sleeve Equipped with smooth small salient point, small salient point and the 5th annular convex rib cooperate.
Preferably, needle stand central plug top forms the 4th end face.
By technical solution of the present invention, needle body is fixed on by needle stand by setting needle stand, needle stand and rubber plug cooperate, injected Bi Hou, needle body follow needle stand to drive rubber plug to be returned in stack shell by push rod, make needle body and displacement using rubber plug elastic material, i.e., will Needle body is not coaxial with stack shell, to promote pull rod that needle body is made to be bent destruction in stack shell and reach and prevent asking for secondary use again Topic, it is ingenious in design, it is powerful；The cooperation of rubber plug and needle stand simultaneously, and achieved the purpose that drain air in stack shell.
Detailed description of the invention
Fig. 1 is that the present invention implements appearance diagram；
Fig. 2 is each parts decomposition diagram of Fig. 1；
Fig. 3 is the structural schematic diagram of component push rod 1 in Fig. 2；
Fig. 4 is the structural schematic diagram of component rubber plug 2 in Fig. 2；
Fig. 5 is the structural schematic diagram of component stack shell 3 in Fig. 2；
Fig. 6 is the structural schematic diagram of component sealing ring 4 in Fig. 2；
Fig. 7 is the structural schematic diagram of component needle stand 5 in Fig. 2；
Fig. 8 is the structural schematic diagram of component needle stand positioning sleeve 6 in Fig. 2；
Fig. 9 is the structural schematic diagram of component needle stand central plug 7 in Fig. 2；
Figure 10 is the structural schematic diagram of component needle body 8 in Fig. 2；
Figure 11 is each portion's schematic diagram of component needle protecting cover 9 in Fig. 2；
Figure 12 is the structural schematic diagram that push rod 1 and rubber plug 2 assemble in Fig. 2；
Figure 13 is push rod 1 in Fig. 2, the structural schematic diagram after the assembling of rubber plug 2 with the completion assembling of stack shell 3；
Figure 14 is the structural schematic diagram that sealing ring 4 and needle stand 5 assemble in Fig. 2；
Figure 15 is the structural schematic diagram that needle stand positioning sleeve 6 and needle stand central plug 7 assemble in Fig. 2；
Figure 16 is the structural schematic diagram that sealing ring 4, needle stand 5, needle stand positioning sleeve 6, needle stand central plug 7 assemble in Fig. 2；
Integral knot after Figure 17 combines for needle body 8 in Fig. 2 with sealing ring 4, needle stand 5, needle stand positioning sleeve 6, needle stand central plug 7 Structure sticks together each portion's schematic diagram of integral structure after needle body 8 combines；
Figure 18 is that structure completes sealing ring 4, needle stand 5, needle stand positioning sleeve 6, needle stand central plug 7, needle body 8, needle protecting cover in Fig. 2 Each portion's schematic diagram of the component of integral structure after 9 combinations；
Figure 19 is the structural schematic diagram of structure of the invention assembling；
Figure 20 uses each component action schematic diagram of execution steps of exhausting before operating process-extraction medicament；
Figure 21 extracts each component action schematic diagram of medicament using operating process-execution；
Figure 22 completes to execute using operating process-injection rotates each component action schematic diagram of loose withdraw of the needle seat；
Figure 23 retracts traction needle stand needle body using operating process-execution push rod and enters each component action schematic diagram of stack shell；
Figure 24 is pushed forward using operating process-push rod executes each parts action schematic diagram of needle body destruction；
The micro high-precision syringe appearance of the commercially available tradition of Figure 25 and structural schematic diagram；
Figure 26 is the portion the A enlarged drawing of Figure 12；
Figure 27 is the portion the B enlarged drawing of Figure 19；
Figure 28 is the portion the C enlarged drawing of Figure 20；
Figure 29 is the portion the D enlarged drawing of Figure 21；
Figure 30 is the portion the E enlarged drawing of Figure 21；
Figure 31 is the portion the F enlarged drawing of Figure 22；
Figure 32 is the portion the G enlarged drawing of Figure 23；
Figure 33 is the portion the H enlarged drawing of Figure 24.
The toponym that each number designation is referred in attached drawing is as follows: 1- push rod, 2- rubber plug, 3- stack shell, 4- sealing ring, 5- Needle stand, 6- needle stand positioning sleeve, 7- needle stand central plug, 8- needle body, 9- needle protecting cover；
1-1: rectangular handle, 1-2: round flange, 1-3: cyclic annular diamond shape projective structure, 1-4: square annular convex rib, 1- 5: end cylindrical body, 1-51: hemispherical endpoint, the 1-52: the first convex ribs；
2-1: hollow to run through circular hole, 2-2: collar flange, 2-3: class lip-like ring structure, 2-4: cyclic annular diamond sunk knot Structure；2-5: first end face；
3-1: operation handle, 3-2: hollow hole, 3-3: protrusion triangle ring structure, 3-4: first annular plane, 3-5: First annular convex ribs, 3-6: tapered hollow inner hole, 3-7: inner hole scalene cone；
5-1: mounting hole, 5-2: protrusion cylindrical body, 5-3: annular flange, 5-4: annular groove, 5-5: hollow cylinder, 5- 6: protrusion cylinder, the 5-7: the second convex ribs, 5-8: path circular hole, 5-9: center hollow hole, 5-10: peripheral convex ribs；
6-3: third convex ribs, 6-4: second end face, 6-5: stack shell location hole, 6-6: protrusion massif structure, 6-7: in needle stand Heart plug location hole, 6-31: small salient point, the 6-51: the second planar annular, the 6-52: the second annular convex rib, 6-53: hole inner face, 6- 61: summit, 6-62:45 ° of slope, 6-63: recessed openings, 6-71: third annular convex rib；6-72: third planar annular；6-73: Third end face；
7-1: axis location hole, 7-2: positioning end face, 7-3: fourth annular plane, 7-4: fourth annular convex ribs, 7-5: the Four end faces；8-1: needle point；
9-2: hollow cylindrical cavity, 9-3: inner hole wall, the 9-4: the five end face, the 9-21: the five annular convex rib.
Specific embodiment
Present invention is further described in detail for l~33 and specific embodiment with reference to the accompanying drawing:
Embodiment 1
Present invention 0.3ml. containing lid；The full syringe of micro high-precision of tri- kinds of specifications of 0.5ml. and 1ml..Its surface structure Schematic diagram, as shown in Figure 1.
Overall structure mainly includes push rod 1, rubber plug 2, stack shell 3, sealing ring 4, needle stand 5, needle stand positioning sleeve 6, needle stand center Plug 7, needle body 8, needle protecting cover 9 are composed.Push rod 1, which is combined with rubber plug 2 in merging stack shell 3, forms an assembly；And sealing ring 4 It is inserted in the combination of needle stand 5, and needle stand positioning sleeve 6 and needle stand central plug 7 combine, and further act as combination；Needle body 8 is adhered into needle stand 5 Needle protecting cover 9 is put on again；Then sealing ring 4, needle stand 5, needle stand positioning sleeve 6, needle stand central plug 7, needle body 8, the formation of needle protecting cover 9 one are whole Body, then make finally to be assembled with the assembly for completing push rod 1 and 2 stack shell 3 of rubber plug and complete overall architecture.As shown in Figure 2.
1 structure upper end handle design of push rod be it is rectangular, as injection medicament extract and injection medicament operation, rectangular handle 1- 1 in addition to medicament extraction and injection operation purposes, more increases operation needle stand 5 after completing injection and rotates the loose convenience moved back and pulled back； Connecting rod cross-shaped structure endpoint forms round flange 1-2, is displaced for preventing rubber plug 2 outside and as withdrawal needle stand 5 and needle body 8 When prevent and stack shell 3 be detached from；By the center round flange 1-2 with the cyclic annular diamond shape projective structure 1-3 of cylindrical body connection one, to make glue 2 installation positioning of plug；And it is equipped with square annular convex rib 1-4 in 2 installation site of cylindrical body rubber plug, for running through to rubber plug 2 is hollow Circular hole 2-1 opens sealing function；The endpoint of end cylindrical body 1-5 is distributed with four along hemispherical edge at hemispherical endpoint 1-51 A first convex ribs 1-52 completes to execute needle stand 5 and rotates pine and move back and pull back into inside stack shell 3 to inject.As shown in Figure 3.
Rubber plug 2 uses elastomeric material, have in structure it is one hollow through circular hole 2-1, it is hollow to have a ring in circular hole 2-1 Shape diamond sunk structure 2-4, as the positioning in conjunction with the cyclic annular diamond shape projective structure 1-3 of push rod 1；Peripheral annular flange 2-2 and Class lip-like ring structure 2-3 makees for contacting formation sealing with the extruding of the inner wall of 3 hollow hole 3-2 of stack shell after combining with stack shell 3 With.As shown in Figure 4.
There are operation handle 3-1 in two sides in 3 structure of stack shell, convenient for medicament extraction and injection operation；Stack shell is centrally formed hollow Hole 3-2 is completed the push rod 1 of 2 installation of rubber plug and is combined for being placed in；Hollow hole 3-2 entrance side inner wall is designed as protrusion three Angular ring structure 3-3 reduced inner diameter stops round flange 1-2 when push rod 1 is pulled back and loosens, for prevent withdraw needle stand 5 and It is detached from stack shell 3 when needle body 8, opens safety protection function；3 other end of stack shell is tapered hollow inner hole 3-6, tapered hollow inner hole 3-6 5 hollow cylinder 5-5 of needle stand and sealing ring 4 be installed, tapered hollow inner hole 3-6 inner wall contacted with 4 squeezed tight of sealing ring open it is close Envelope effect；The upper end of tapered hollow inner hole 3-6 forms inner hole scalene cone 3-7, and inner hole scalene cone 3-7 is convenient for upward after extraction medicament Exclude residual bubble；There is an annular convex rib 3-5 and first annular plane 3-4 on the outside of proximal points, is used for and 6 knot of needle stand positioning sleeve First annular convex ribs 3-5 nips the second annular convex rib 6-52 of the stack shell location hole 6-5 of needle stand positioning sleeve 6 when conjunction, is allowed to fixed It does not loosen；And first annular plane 3-4 makees precision with the second planar annular 6-51 of needle stand positioning sleeve 6 and is combined, and maintains central axis Line is consistent.As shown in Figure 5.
Sealing ring 4 uses elastomeric material, is the ring structure of round wires diameter in structure, is inserted in the annular groove 5- of needle stand 5 4, it is formed to squeeze to contact and opens sealing function with the tapered hollow inner hole 3-6 inner wall of stack shell 3 when being combined into product.As shown in Figure 6.
There is a hollow cylinder 5-5 in 5 structure of needle stand side on excircle；Annular groove 5-4 is assembled for sealing ring 4； Annular flange 5-3 except in addition to 4 positioning action of sealing ring, after assembling annular flange 5-3 with it is convex in the hollow hole of needle stand positioning sleeve 6 Come out of retirement and take up an official post body mechanism 6-6 summit 6-61 contact, and protrude two sides protrusion cylindrical body 5-2 assembling after enter massif mechanism 6-6 it is recessed It falls into opening 6-63 and positions, needle stand is limited to summit 6-61 and protrusion cylindrical body 5-2 is positioned in recessed openings 6-63 and opens limit Position effect, then needle stand 5 and needle stand positioning sleeve 6, which will not be displaced, opens fixed function；Axis is parallel in the interior wall of center hollow hole 5-9 Four the second convex ribs 5-7 of line, for inject complete when with 1 four the first convex ribs 1- of upper half spherical shape endpoint 1-51 edge distribution of push rod 52 are combined to be formed and staggeredly interfere, and execute 1 rotation process of push rod needle stand 5 is driven to rotate together and opens the pine effect of moving back；Center hollow The endpoint of hole 5-9 forms path circular hole 5-8, and draw is opened in the movement of pulling back stepped back as rotation pine, makes needle stand 5 and needle body 8 It pulls in inside stack shell 3；The peripheral convex ribs 5-10 of four for being parallel to axis in outside, makes to protrude convenient for making rotation to needle stand when assembling Cylindrical body 5-2 enters the operation needs of positioning recessed openings 6-63 Nei, and protects across the axis location hole 7-1 of needle stand central plug 7 It holds consistent with central axis；There is a protrusion cylinder 5-6 on the circumference at the end hollow cylinder 5-5, completes to execute rotation in injection Pine move back and pull back needle body when maintain contacted with 2 end face squeezed tight of rubber plug, when needle body 8 is pulled back completely into stack shell 3, because of rubber plug 2 elastic reaction makes needle stand 5 be restrained work by lesser path circular hole 5-8 with the first convex ribs 1-52 of push rod front end hemispherical endpoint Fulcrum, pressure force needle body 8 deviate central axis, in favor of push rod 1 be pushed forward again into make needle point 8-1 resist in needle stand central plug 7 the 4th end face 7-5,8 stress destruction of needle body are bent and lock inside stack shell 3, any link ensure needle point 8-1 do not leak outside and Reach the effect being perfectly safe, more prevents secondary reuse chance.As shown in Figure 7.
6 structure centre of needle stand positioning sleeve has through hollow hole, one end as combined with stack shell 3 with stack shell location hole 6-5, It is contacted with the end face of tapered hollow inner hole 3-6 as position-limiting action, the second convex annular when hole inner face 6-53 is combined as stack shell 3 The first annular convex ribs 3-5 that muscle 6-52 is used to nip stack shell 3 with stack shell 3 when being combined is allowed to fixation and does not loosen, the second planar annular 6-51 makees precision with the first annular plane 3-4 in 3 outside of stack shell and is combined, it is ensured that central axis is consistent.The other end as with needle stand The needle stand central plug location hole 6-7 that central plug 7 combines, when in conjunction with needle stand central plug, third annular convex rib 6-71 nips needle The fourth annular convex ribs 7-4 placed outside seat central plug 7 is allowed to fixation and does not loosen；Third planar annular 6-72 and needle stand central plug 7 The fourth annular plane 7-3 of periphery makees accurate combine, it is ensured that central axis is consistent；And the third of needle stand central plug location hole 6-7 End face 6-73 and the positioning end face 7-2 of needle stand central plug 7 are limited.180 ° are corresponded to each other in the interior wall through centre bore middle section Protrude massif structure 6-6, summit 6-61 be it is arc-shaped, side slope 6-62 at 45 °, other side slope peak dot corresponds to bottom and is formed The recessed openings 6-63 of one vertical axis；Summit 6-61 makees as support needle stand 5, annular flange 5-3 effect, recessed openings 6-63 For needle stand 5 protrudes the protrusion cylindrical body 5-2 positioning of two sides and opens position-limiting action；When 45 ° of slope 6-62 rotate pine as needle stand 5 and move back Guidance protrusion cylindrical body 5-2 motion profile effect is opened, makes needle stand 5 towards 3 internal displacement of stack shell.There are four to be parallel in outer circumference Respectively there is a smooth small salient point 6-31 on the third convex ribs 6-3 of central axis, third convex ribs 6-3, it is small convex when closing needle protecting cover 9 Point 6-31 can open detent effect with the 5th annular convex rib 9-21 of 9 inner wall of needle protecting cover, and needle protecting cover is made to be not easy to loosen；And third convex ribs 6-3 and 9 inner hole wall 9-3 of needle protecting cover keeps appropriate gap, and needle protecting cover 9 will not rock；And the of second end face 6-4 and needle protecting cover 9 Five end face 9-4 are touched, and make position-limiting action when needle protecting cover 9 closes；Injection operation separately is completed, when execution needle stand rotation pine moves back, one The rectangular handle 1-1 of finger rotating push rod 1 of hand, and another finger gripping lives in third convex ribs 6-3, when rotation process, open anti-rotation on-slip Effect.As shown in Figure 8.
7 structure centre of needle stand central plug has through axis location hole 7-1, to four peripheral convex ribs 5-10 in 5 outside of needle stand Support is opened to act in central axis；Fourth annular convex ribs 7-4 when combination on outside is by the third annular of 6 inner hole of needle stand positioning sleeve Convex ribs 6-71, which is nipped, to be positioned, and is allowed to firm and is not loosened；And fourth annular plane 7-3 and third planar annular 6-72 makees precision In conjunction with, it is ensured that central axis is consistent；And it positions end face 7-2 and contacts work with the third end face 6-73 of needle stand central plug location hole 6-7 For position-limiting action；4th end face 7-5 destroys the bending of 8 stress of needle body for resisting needle point 8-1 when executing needle body 8 and destroying, lock It does not leak outside inside syringe firmly, prevents secondary needle from pricking infection accident and occur.As shown in Figure 9.
Needle body 8 is accurate stainless steel hollow tubular structure, and center has through hollow hole, and wherein one end is ground into sharp cutting edge Needle point 8-1 punctures human skin for injecting.Sticker is coated in no cutting edge one end and 5 needle body mounting hole 5-1 of needle stand adhesion is solid It is fixed.As shown in Figure 10.
9 structure centre of needle protecting cover forms hollow cylindrical cavity 9-2, opens protective effect to needle point 8-1 for storing needle body 8, is closing When upper needle protecting cover the 5th annular convex rib 9-21 of interior wall will surmount 6 small salient point 6-31 of needle stand positioning sleeve open detent effect, protect needle Lid is not easy to loosen；And the third convex ribs 6-3 of hollow cylindrical cavity 9-2 inner hole wall 9-3 and needle stand positioning sleeve 6 will not close to holding needle protecting cover It rocks；And the 5th end face 9-4 is touched with the second end face 6-4 of needle stand positioning sleeve 6, as opening position-limiting action when closing.Such as Figure 11 It is shown.
Hollow by elastomer rubber plug 2 enters through the position circular hole 2-1 through the hemispherical endpoint 1-5 end cap of push rod 1, to contact Round flange 1-2, then central hole ring-type diamond sunk structure 2-4 and ring-type diamond shape projective structure 1-3, which makes knots, closes positioning work With preventing from moving forward and backward function when operation, while square annular convex rib 1-4 and hollow to run through wall in circular hole 2-1 mutually close It squeezes and opens sealing function.Each portion's schematic diagram after being combined referring to push rod 1 with rubber plug 2, as shown in figure 12.
The push rod 1 being completed, rubber plug 2 are pushed among stack shell 3 inside emptying aperture 3-2 in the heart, then the ring-type of rubber plug 2 is convex The mutual squeezed tight of wall in edge 2-2 and class lip-like ring structure 2-3 and hollow hole 3-2 and open sealing function.Referring to push rod 1, glue Each portion's schematic diagram of assembling is completed after 2 combination of plug with stack shell 3, as shown in figure 13.
The annular groove 5-4 for the sealing ring installation that needle stand 5 is inserted in the assembling of elastomer sealing ring 4 is positioned.Referring to close Seal 4 combined with needle stand 5 after each portion's schematic diagram, as shown in figure 14.
Needle stand central plug 7 is entered to the needle stand central plug location hole 6-7 of needle stand positioning sleeve 6 with the 4th end face 7-5 side pressure, then needle Seat 7 periphery fourth annular convex ribs 7-4 of central plug cross needle stand central plug positioning hole protrusion third annular convex rib 6-71 and by It is close to sandwich positioning, while third planar annular 6-72 is contacted with fourth annular plane 7-3 ensures that integral central axis is consistent, this The end face Shi Dingwei 7-2 is closely sealed with third end face 6-73 and fixes.It is each after being combined referring to needle stand positioning sleeve 6 with needle stand central plug 7 Portion's schematic diagram, as shown in figure 15.
Sealing ring 4,5 assembly of needle stand merging completion needle stand central plug 7,6 assembly of needle stand positioning sleeve will be completed, by stack shell Location hole 6-5 side enters in hole, then two skew backs of the projecting inward massif structure 6-6 of needle stand center consent can be prolonged by protruding cylindrical body 5-2 Face slides into the lowest point, and until annular flange 5-3 is contacted with summit 6-61, rotation is exposed outside four of the needle stand 5 outside needle stand central plug 7 Convex ribs 5-10 is enclosed, enters protrusion cylindrical body 5-2 in locating recesses opening 6-63, then needle stand 5 is limited to summit 6-61 and cylinder The position-limiting action of body locating recesses opening 6-63, which will not be displaced, opens stabilization, while four periphery convex ribs 5-10 are limited to axis Location hole 7-1 internal diameter and stablize be in central axis.It is combined referring to sealing ring 4, needle stand 5, needle stand positioning sleeve 6, needle stand central plug 7 Each portion's schematic diagram of integral structure afterwards, as shown in figure 16.
The other end needle body outer surface that needle body 8 leaves needle point 8-1 is uniformly coated with sticker, completes sealing ring from above 4, needle stand 5, needle stand positioning sleeve 6, needle stand central plug 7 are assembled into integrally-built needle body mounting hole 5-1 and are placed in and position.Reference Needle body 8 after integral structure adhesion needle body 8 combines after combining with sealing ring 4, needle stand 5, needle stand positioning sleeve 6, needle stand central plug 7 at Each portion's schematic diagram of overall structure, as shown in figure 17.
From sealing ring 4, needle stand 5, needle stand positioning sleeve 6, the assembling of needle stand central plug 7 and the adhesion of needle body 8 are completed above at whole Body structure is touched up to the 5th end face 9-4 with second end face 6-4, then needle protecting cover 9 by needle protecting cover 9 from needle point 8-1 end cap The 5th annular convex rib 9-21 of inside of hollow cylindrical cavity 9-2 surmount 6 peripheral parallel of needle stand positioning sleeve in axis third convex annular Small salient point 6-31 on muscle 6-3 is positioned and is not easy to loosen, the inner wall 9-3 of hollow cylindrical cavity 9-2 and the third annular for being parallel to axis The gap slightly convex ribs 6-3 is maintained at axis centre and will not shake, and is combined into group's component.Referring to completion sealing ring 4, needle stand 5, each portion's schematic diagram of the component of integral structure after needle stand positioning sleeve 6, needle stand central plug 7, needle body 8, needle protecting cover 9 combine, such as Shown in Figure 18.
It will be combined into group's component above and make last group with the combination that push rod 1, rubber plug 2, stack shell 3 assemble is completed It closes, the end face of the tapered hollow inner hole 3-6 of stack shell 3 is inserted in the stack shell location hole 6-5 of needle stand positioning sleeve 6 and is positioned, then taper The end face of hollow inner hole 3-6 is touched with the hole location end face 6-53 of stack shell location hole 6-5, and the first annular convex ribs 3-5 of outer circle is crossed Second annular convex rib 6-52 of combined hole wall and closely positioned and do not loosened, while axis limit the second planar annular 6-51 and make Ensure overall structure and central axis straight line for the first annular plane 3-4 contact of axis and remain consistent.And the hollow circuit cylinder of needle stand 5 Body 5-5 and sealing ring 4 enter in shape tapered hollow inner hole 3-6 together, and wall in 4 outer rim of sealing ring and tapered hollow inner hole 3-6 It squeezes to be in close contact and opens sealing function.It is above to complete the entire full syringe construction assembling of micro high-precision recycling destruction formula.Reference It is fully completed each parts schematic diagram for combining the micro full syringe of high-precision, as shown in figure 19.
Using operating process (one), executions steps of exhausting before extracting medicament: needle protecting cover 9 is removed, push rod 2 is pushed away towards stack shell Enter until the contact of rubber plug 23 bottom of stack shell, residual air is emptied completely.Then four, the edge of 1 front end hemispherical endpoint 51 of push rod First convex ribs 1-52 passes through the lesser path circular hole 5-8 of needle stand 5 and enters in the 5-9 of center hollow hole, and in hollow cylinder 5-5 Circumference protrudes above cylinder 5-6 and can contact with the formation extruding of rubber plug 2.Stack shell internal residual air is emptied completely before extracting medicament, The drug metering entered in stack shell when extracting medicament is consistent with scale completely.The purpose for executing exhaust, which is removed, is easy to control pumping It takes except medicament precision, the prior frictional resistance for restoring rubber plug lubrication reduction and stack shell inner wall, operate more smoothly, because of glue Plug material is elastomer, although stack shell inner wall application of lubricating (Medical silicone oil) before assembling, glue after being combined for airtight mesh Edge and barrel, which are formed, beyond the Great Wall squeezes contact, and one length of resting period can open discharge effect to lubricant in contact surface, makes rubber plug and cylinder The wall resistance of motion become larger it is ineffective in operation smoothly, executing exhaust and can restoring rubber plug lubricity reduces and the friction of stack shell inner wall resistance Power, operation is more smoothly.Referring to each component illustrative view of execution steps of exhausting before operating process-extraction medicament, such as Figure 20 institute Show.
Using operating process (two), executes and extract medicament: the needle point 8-1 of needle body 8 being submerged in medicament, for example bottled medicament Needle point 8-1 puncture bottleneck soft rubber stopper is then submerged into medicament, pulls the rectangular handle 1-1 of push rod 1, then rubber plug 2 leaves 3 inner hole of stack shell Bottom retreats, then 1 the first convex ribs 1-52 of four, the front end edge hemispherical endpoint 1-51 of push rod is by 5 center hollow hole 5-9 of needle stand It is detached from through lesser path circular hole 5-8, medicament sucks medicament in 3 inner hole of stack shell with moving distance at this time, until rubber plug 2 Until the metering scale on the class lip-like position ring structure 2-3 and stack shell surface, complete medicine meter and extract, the needle point 8-1 of needle body 8 from It writes a prescription agent.Each component illustrative view of medicament is extracted referring to operating process-execution, as shown in figure 21.
Using operating process (three), medicament injection is executed: the needle point 8-1 of needle body 8 being pierced through into human epidermal skin and reaches note It penetrates position, pushes the rectangular handle 1-1 of push rod 1 that rubber plug 2 is made to advance towards 3 inner hole bottom of stack shell, then medicament is injected with shift length Medicament is set to be injected in vivo completion injection until the contact of rubber plug 23 inner hole bottom of stack shell into human body；By the needle point 8-1 of needle body 8 from Human epidermal skin is extracted.Each component associated position executes exhaust with using before operating process (one)-extraction medicament at this time Step is completely the same；Referring to each component illustrative view of execution steps of exhausting before operating process-extraction medicament, with reference to Figure 20 institute Show.
Using operating process (four), injection, which is completed to execute, rotates loose withdraw of the needle seat: complete injection, by the needle point 8-1 of needle body 8 from Human epidermal skin is extracted.Singlehanded 6 position outer circumference third annular convex rib 6-3 of finger gripping needle stand positioning sleeve, in addition on the other hand Fingerhold push rod 1 rectangular handle 1-1, as figure arrow direction rotate 150 °.6 outer circumference convex ribs third of needle stand positioning sleeve The rectangular handle 1-1 of annular convex rib 6-3 and push rod 1 plays good anti-sliding function to this rotation process, is conducive to the jail of rotation process By property.1 end cylindrical body 1-5 of push rod is at the center of the path circular hole 5-8 of needle stand 5 at this time, and hemispherical end point edge four One convex ribs 1-52 is in the 5-9 of center hollow hole and is formed with four the second convex ribs 5-7 of interior wall and staggeredly interfered, so push rod 1 Rotation drives needle stand 5 to make synchronous rotary, recessed openings 6-63 of the protrusion cylindrical body 5-2 because being rotated away from protrusion massif structure 6-6 Detent point is forced to follow 45 ° of slope 6-62 and the position 6-61 that reaches the crest of the hill, makes needle stand 5 and sealing ring 4 and the whole court of needle body 8 Pine is given up the throne shifting in 3 hollow hole of stack shell.It is prior because 4 material of sealing ring be elastomer, although before assembling stack shell inner wall be coated with Lubricant (Medical silicone oil), but 4 outer rim of sealing ring and barrel form and squeeze contact after combining for airtight mesh, and the resting period one is long Discharge effect can be opened to lubricant in contact surface, so that sealing ring 4 and barrel is operated resistance and is become larger and be unfavorable for pullback operation, execute with Upper rotation pine, which moves back work, can restore the frictional resistance of 4 lubricity of sealing ring reduction and stack shell inner wall, make pullback operation more smoothly.Ginseng It completes to execute according to operating process-injection and rotates each component illustrative view of loose withdraw of the needle seat, as shown in figure 22.
Using operating process (five), push rod retracts traction needle stand needle body and enters stack shell: it completes above-mentioned rotation pine and moves back work, At this moment 1 hemispherical end point edge of push rod, four the first convex ribs 1-52 are in the center hollow hole 5-9 of needle stand 5, and four first Convex ribs 1-52 periphery diagonal line is greater than 5 path circular hole 5-8 diameter of needle stand, so two basic change is not easy to loosen；5 hollow circuit cylinder of needle stand Body 5-5 circumference protrudes above cylinder 5-6 and contacts with the first end face 2-5 of elastomer rubber plug 2 extruding；With finger by push rod 1 rectangular Hand 1-1 such as Figure 23 arrow direction pulling opens draw and pulls needle stand 5 and sealing ring 4 and needle body 4 whole completely into stack shell 3 In hollow hole；And 5 hollow cylinder 5-5 circumference of needle stand protrudes above cylinder 5-6 and contacts with the extruding of the end face of elastomer rubber plug 2, this When there is elasticity needle stand 5 and sealing ring 4 and needle body 8 will be forced whole with needle stand 5 and push rod front end hemispherical endpoint because of rubber plug 2 First convex ribs 1-52 is tied to the path circular hole 5-8 of needle stand 5 as swing pivot, and pressure forces needle body 8 to be deflected away from center Axis；It is straight slightly larger than 3 inner wall of stack shell protrusion triangle ring structure 3-3 in the round flange 1-2 outer diameter of mechanism design upper push-rod 1 Diameter, push rod retracts operation can anti-throw-out lever 1 and the disengaging of stack shell 3, safety protection function.It is drawn referring to operating process-execution push rod It returns traction needle stand needle body and enters each component illustrative view of stack shell, as shown in figure 23.
Using operating process (six), push rod, which is pushed forward, executes needle body destruction: completing above-mentioned push rod and retracts needle stand 5 and sealing ring 4 It is whole completely into 3 hollow hole of stack shell with needle body 8, then push rod 1 is promoted towards 3 direction of stack shell, it has been deflected away from because of needle body 8 Mandrel line, 8 tip needle point 8-1 of needle body can contradict the inner hole scalene cone 3-7 of stack shell 3 or the 4th end face 7-5 system of needle stand central plug 7 Only it is moved on, and is at this moment forced needle body bending to deform in the rectangular handle 1-1 of push rod 1 increasing force and is destroyed and lock in stack shell 3 Inside hollow hole, subsequent processing link can absolutely prevent the unusual infection event of secondary needle letter from occurring, and it is anti-to reach national safety Protective function, and prevent secondary reuse.It is pushed forward referring to operating process-push rod and executes each parts actuation signal of needle body destruction Figure, as shown in figure 24.
In short, the foregoing is merely presently preferred embodiments of the present invention, it is all according to equalization made by scope of the present invention patent Variation and modification, shall all be covered by the patent of the invention.

Claims (14)

1. disposable micro high-precision safety injector, including push rod (1), rubber plug (2) and stack shell (3), push rod (1) and rubber plug (2) cooperation is placed in from stack shell (3) upper end, and stack shell (3) lower end is combined with needle body (8), which is characterized in that the lower end of stack shell (3) is set Have needle stand positioning sleeve (6), cooperates needle stand (5) in needle stand positioning sleeve (6), one end of needle body (8) is fixed on needle stand (5)；Push rod (1) it drives needle stand (5) rotation pine to move back, while drawing in needle body (8) to stack shell (3), and be bent needle body (8) and lock in stack shell (3) It is interior.
2. disposable micro high-precision safety injector according to claim 1, which is characterized in that rubber plug (2) is by elastomer Material is made, and center is hollow through circular hole (2-1), and the bottom surface of rubber plug (2) forms first end face (2-5)；Push rod (1) passes through The hollow of rubber plug (2) cooperates above circular hole (2-1) and needle stand (5)；Stack shell (3) center is hollow hole (3-2), stack shell (3) Lower end be hollow inner hole (3-6).
3. disposable micro high-precision safety injector according to claim 2, which is characterized in that needle stand (5) outer upper side Equipped with hollow cylinder (5-5), the excircle of hollow cylinder (5-5) is equipped with protrusion cylinder (5-6), protrudes cylinder (5-6) It is formed to squeeze with the first end face (2-5) of rubber plug (2) and be contacted；Push rod (1) lower end base is hemispherical endpoint (1-51), hemispherical Endpoint (1-51) is uniformly distributed there are four the first convex ribs (1-52)；It is equipped with center hollow hole (5-9) above needle stand (5), in center The top of emptying aperture (5-9) forms path circular hole (5-8), and the diameter of path circular hole (5-8) is less than push rod (1) hemispherical endpoint (1- 51) the opposite side axial line distance of four the first convex ribs (1-52)；The interior wall in center hollow hole (5-9), which is uniformly distributed, is parallel to axis Four the second convex ribs (5-7) of line, the first convex ribs (1-52) of hemispherical endpoint (1-51) and the interior wall of center hollow hole (5-9) The second convex ribs (5-7) cooperate.
4. disposable micro high-precision safety injector according to claim 3, which is characterized in that be located on the outside of needle stand (5) Below hollow cylinder (5-5), it is successively arranged annular flange (5-3) and protrudes from the round in 180 ° of protrusion of needle stand (5) two sides Cylinder (5-2)；Needle stand positioning sleeve (6) middle section is equipped with the protrusion massif structure (6-6) that inner wall corresponds to each other 180 °, protrudes massif knot It to be formed on structure (6-6) summit (6-61), side slope at 45 ° (6-62), other side slope bottom corresponding with summit forms one The recessed openings (6-63) of vertical axis, summit (6-61) are used to support the annular flange (5-3) of needle stand (5), recessed openings (6- 63) for limiting the protrusion cylindrical body (5-2) of needle stand (5) protrusion two sides, 45 ° of slopes (6-62) are moved back for needle stand (5) rotation pine When along protrusion cylindrical body (5-2) motion profile, make needle stand (5) towards stack shell (3) internal displacement.
5. disposable micro high-precision safety injector according to claim 4, which is characterized in that be located on the outside of needle stand (5) It is equipped with annular groove (5-4) between hollow cylinder (5-5) and annular flange (5-3), is cased with sealing ring on annular groove (5-4) (4)；Sealing ring (4) is made of elastomeric material, and structure is the ring structure of round wires diameter, in sealing ring (4) and stack shell (3) Empty inner hole (3-6) inner wall, which is formed, squeezes contact.
6. disposable micro high-precision safety injector according to claim 3, which is characterized in that push rod (1) lower end is successively Equipped with cyclic annular diamond shape projective structure (1-3) and end cylindrical body (1-5), end cylindrical body (1-5) is equipped with square convex annular Muscle (1-4), hemispherical endpoint (1-51) are located at the bottom end end cylindrical body (1-5)；The hollow of rubber plug (2) runs through in circular hole (2-1) Square annular convex rib (1-4) extrusion fit of wall and push rod (1)；It is hollow to be equipped with and push rod (1) in the one end circular hole (2-1) Cyclic annular diamond shape projective structure (1-3) cooperation positioning cyclic annular diamond sunk structure (2-4)；It and is collar flange on the outside of the end (2-2), other end outside is class lip-like ring structure (2-3), and bottom end is first end face (2-5)；The collar flange of rubber plug (2) The inner wall extrusion fit of the hollow hole (3-2) of (2-2) and class lip-like ring structure (2-3) and stack shell (3).
7. disposable micro high-precision safety injector according to claim 6, which is characterized in that push rod (1) is equipped with circle Shape flange (1-2)；Stack shell (3) upper end inlet forms the protrusion triangle ring structure (3-3) for reducing diameter, and push rod (1) passes through Round flange (1-2) is matched with protrusion triangle ring structure (3-3).
8. disposable micro high-precision safety injector according to claim 3, which is characterized in that stack shell (3) lower end periphery Equipped with first annular plane (3-4) and first annular convex ribs (3-5)；The upper section of needle stand positioning sleeve (6) is stack shell location hole (6- 5), stack shell location hole (6-5) is successively arranged in the second planar annular (6-51), the second annular convex rib (6-52) and hole under upper End face (6-53), first annular plane (3-4), first annular convex ribs (3-5) and tapered hollow inner hole (3-6) respectively with the second ring Shape plane (6-51), the second annular convex rib (6-52) and hole inner face (6-53) work agree with.
9. disposable micro high-precision safety injector according to claim 8, which is characterized in that needle stand positioning sleeve (6) Lower section is needle stand central plug location hole (6-7), is fixed with below needle stand positioning sleeve (6) by needle stand central plug location hole (6-7) Needle stand central plug (7), the center of needle stand central plug (7) are axis location hole (7-1)；Needle stand (5) and needle body (8) pass through in needle stand The axis location hole (7-1) of heart plug (7) is pierced by needle stand central plug (7).
10. disposable micro high-precision safety injector according to claim 9, which is characterized in that the positioning of needle stand central plug It is third that hole (6-7), which is successively arranged third annular convex rib (6-71), third planar annular (6-72) from top to bottom and is located at bottom end, End face (6-73)；Fourth annular convex ribs (7-4), fourth annular plane (7-3) and positioning are successively arranged on the outside of needle stand central plug (7) End face (7-2)；Third annular convex rib (6-71) and third planar annular (6-72) respectively with fourth annular convex ribs (7-4), the 4th Planar annular (7-3) work agrees with, and third end face (6-73) is engaged with positioning end face (7-2).
11. disposable micro high-precision safety injector according to claim 3, which is characterized in that push rod (1) upper end is equipped with Rectangular handle (1-1).
12. disposable micro high-precision safety injector according to claim 9, which is characterized in that needle body (8) other end is worn Needle stand central plug (7) and it is cased with needle protecting cover (9) out；Needle stand positioning sleeve (6) upper end is flange end, flange end and needle stand positioning sleeve (6) lower outer forms second end face (6-4), has four to be parallel on the circumference of the lower outer of needle stand positioning sleeve (6) The third convex ribs (6-3) of mandrel line；The center of needle protecting cover (9) is center cylindrical cavity (9-2), and the top of needle protecting cover (9) is the 5th end Face (9-4)；The inner hole wall (9-3) of center cylindrical cavity (9-2) and the third convex ribs (6-3) of needle stand positioning sleeve (6) cooperate, and the 5th end The second end face (6-4) of face (9-4) and needle stand positioning sleeve (6) cooperates.
13. disposable micro high-precision safety injector according to claim 12, which is characterized in that in needle protecting cover (9) 5th annular convex rib (9-21) is formed at the top of heart cylindrical cavity (9-2), and the third convex ribs (6-3) of needle stand positioning sleeve (6) are equipped with flat Sliding small salient point (6-31), small salient point (6-31) and the 5th annular convex rib (9-21) cooperate.
14. disposable micro high-precision safety injector according to claim 9, which is characterized in that needle stand central plug (7) top End forms the 4th end face (7-5).
CN201811480821.4A 2018-12-05 2018-12-05 Disposable micro volume high precision safety syringe Active CN109908433B (en)

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CN114887158A (en) * 2022-06-09 2022-08-12 中国人民解放军陆军特色医学中心 Intravenous anesthetic quantifying device for anesthesia induction

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CN201862071U (en) * 2010-10-11 2011-06-15 汪贤宗 Safety injection needle cylinder
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