CN104436364A - Safety self-destructive intravenous infusion needle - Google Patents
Safety self-destructive intravenous infusion needle Download PDFInfo
- Publication number
- CN104436364A CN104436364A CN201410787413.9A CN201410787413A CN104436364A CN 104436364 A CN104436364 A CN 104436364A CN 201410787413 A CN201410787413 A CN 201410787413A CN 104436364 A CN104436364 A CN 104436364A
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- Prior art keywords
- self
- needle
- destruction plug
- protecting tube
- destruction
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Classifications
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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
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
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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
- A61M5/50—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
- A61M5/5086—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 for indicating if defective, used, tampered with or unsterile
-
- 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
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/0007—Special media to be introduced, removed or treated introduced into the body
-
- 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
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/04—Liquids
Abstract
The invention relates to a safety self-destructive intravenous infusion needle. A self-destructive mandrel and a needle seat are integrally formed, one end of the self-destructive mandrel connected with the needle seat is a small end axially facing the needle seat, and the other end is a large conical end. The cavity of a protection pipe is provided with a self-destructive mandrel positioning shrinkage hole corresponding to one end of an infusion end of the self-destructive mandrel, a limit step is formed at the junction of the self-destructive mandrel positioning shrinkage hole and the cavity of the protection pipe, the needle seat is provided with a positioning shaft section sliding into the self-destructive mandrel positioning shrinkage hole, and the outer diameter and the axial length of the positioning shaft section are matched with the self-destructive mandrel positioning shrinkage hole. One end face of the positioning shaft section is a breakage end face connected with the conical end of the self-destructive mandrel, an annular cut with the triangular section is formed between the breakage end face and the self-destructive mandrel through the conical end, the other end of the positioning shaft section is provided with an annular limit projection, and the annular limit projection can slide into the cavity of the protection pipe to be in limit match with the limit step. The safety self-destructive intravenous infusion needle has the advantages of simple structure, convenience in machining, good operational continuity, safety and reliability.
Description
Technical field
The present invention relates to technical field of medical instruments, is that one can only disposable safety self-destructing venoclysis needle.
Background technology
Since last century end, due to society and technology, dangerous transfusion oneself become one of main path of the various infectious disease cross transmission of the mankind, seriously jeopardize human health.Round Realization safe infusion, oneself becomes the important step ensureing health of masses.
According to the definition of World Health Organization (WHO), so-called safe infusion should comprise the content of three aspects: one is harmless to accepting transfusion person; Two is do not form any danger to health care personnel; Three is that the garbage that transfusion produces does not endanger composition of society.This just requires that transfusion needle must possess corresponding security feature:
1, transfusion needle uses once, and its original function is lost.This feature can ensure technically to accept transfusion person not by its reuse endanger.
2, transfusion needle uses once, and it exposes needle point conceals.This feature can ensure that discarded transfusion needle does not pollute environment technically, does not form the danger such as needle stick injury and cross infection to health care and other staff.
3, transfusion needle uses once, and its original function is lost and exposed needle point and conceals and automatically realize in the lump.This feature can overcome manually operated uncertainty, particularly thoroughly can stop the generation of the various dangerous transfusion condition caused by intentional act.
Along with the raising of safety consciousness, and after regulation and instruction occur accordingly, for the fluid delivery apparatus of band puncture needle, as syringe cylinder, venoclysis needle etc., various safety self-destruct functional structure is employed and improves.Existing for venoclysis needle, its self-destroying function structure is: puncture needle tubing is arranged to activity and can bounces back in needle stand, after venoclysis needle uses, makes puncture needle tubing bounce back in needle stand by operation part, expose needle point to conceal, and prevent puncture needle tubing from resetting by backing stop structure; Thus reach safety self-destruct function; But due to the small volume of transfusion needle, should ensure that transfusion is unobstructed, also to design corresponding backing stop structure, existing backing stop structure is caused to there is reliable design sex chromosome mosaicism like this, exist under certain operation, the effect of backing stop structure can be eliminated, transfusion needle is promoted again reset, transfusion needle is likely reused by illegal retailer, therefore correctly cannot realize the self-destruction of transfusion needle.
Also having a kind of structure to adopt prevents the backing stop structure of needle tubing return from adding the structure that fractures, and makes transfusion needle without the value of recycling, thus has stopped the possibility of illegal recovery transfusion needle, reach safety self-destruct function, if China Patent No. is " single use safety intravenous needle " disclosed in the patent documentation of 200520086804.4 (Authorization Notice No. is: CN 2829755Y), its primary structure is: comprise needle stand, needle point (its essence is the puncture needle of band tip), blade (its essence is for convenience of the fin be fixed on by transfusion needle by adhesive tape on transfusion person), needle guard, conduit, socket is provided with outside needle stand, socket comprises protecting tube and the pedestal with protecting tube one, pedestal hollow, two ends have socket, middle part is provided with block tongue, plug is the plug body corresponding with socket, plug body top hollow, there is the latch higher than plug body at two ends, centre is that (its essence is have infusion channel to a fibre conduit, and there is the self-destruction plug of the self-destroying function that fractures), fibre conduit establishes fracture, the fibre conduit of plug inserts in socket and is plugged in together.Having after use can self-destruction, prevents using rear syringe needle to expose and stabs and infected situation or recovery are resell, bring the advantages such as the situation of harm greatly to the life and health of people.But the intravenous needle of said structure still exist fracture structure and backing stop structure design unreasonable, specific as follows:
Its structure that fractures is the otch be arranged in the middle part of fibre conduit, and fibre conduit has infusion function, it is hollow pipe, be subject to the restriction of transfusion needle overall volume, and ensureing the transfusion patency of fibre conduit, fibre conduit wall thickness is thinner, and incision design is comparatively inconvenient, otch is too shallow, and the later stage fractures inconvenience, too dark then impact assembling and using.
Secondly, after fibre conduit fractures, fibre conduit is drawn out longer distance, and the fracture of fibre conduit exposes, and there is Cleaner equally in operation, and fracture stabs the risk of Cleaner.
And, on transfusion needle, backing stop structure adopts the block tongue and boss (being label 15 in document) that are provided with in protecting tube, make needle stand major part be stuck in hub boss can not move down again, socket block tongue withstands on needle stand microcephaly simultaneously, not only backing stop structure is complicated, there is processing inconvenience, and incision design and the backing stop structure independence on it higher, without synergism, in actual use, exist after fibre conduit upper cut is drawn out protecting tube, and the needle stand be arranged on fibre conduit does not coordinate the problem put in place with the backing stop structure between protecting tube, there are operator to fracture in advance fibre conduit, and backing stop structure does not coordinate and puts in place, exist in Cleaner's operating process, needle point is surprisingly pushed back by pressing fibre conduit exposed parts, cause the problem of security incident.
Summary of the invention
For the deficiency that prior art exists, the object of the present invention is to provide one to fracture structure and backing stop structure advantages of simple, easy to process, operation continuity is good, safe and reliable safety self-destructing venoclysis needle.
For achieving the above object, the invention provides following technical scheme: a kind of safety self-destructing venoclysis needle, include protecting tube, puncture needle, self-destruction plug and needle stand, fin is provided with outside described protecting tube, protecting tube is the sleeve pipe of hollow, self-destruction plug to be inserted in protecting tube slidably, self-destruction plug one end is the transfusion end connecting transfusion catheter, the transfusion end of self-destruction plug passes protecting tube, the self-destruction plug other end connects described needle stand, puncture needle is arranged on needle stand, it is characterized in that: described self-destruction plug and needle stand one-body molded, self-destruction plug is connected one end end with needle stand is taper, on self-destruction plug, this tapering point is axially little towards needle stand one end, the other end is large, the location shrinkage cavity of self-destruction plug is provided with in the tube chamber of described protecting tube, the location shrinkage cavity of self-destruction plug is positioned at one end port of protecting tube tube chamber corresponding self-destruction plug transfusion end, the location shrinkage cavity of self-destruction plug and protecting tube tube chamber face the place of connecing and form limited step, self-destruction plug and self-destruction plug locate shrinkage cavity location fit, described needle stand is provided with the location shaft part that can slip in the location shrinkage cavity of self-destruction plug, it is adaptive that location shaft part external diameter and self-destruction plug locate shrinkage cavity aperture, it is suitable that location shaft part axial length and self-destruction plug locate shrinkage cavity axial length, face, shaft part one end, location is the end face that fractures connecting described self-destruction plug tapering point, location shaft part fracture between end face and self-destruction plug through tapering point Formation cross-section shape be leg-of-mutton annular incision, the location shaft part other end is provided with annular stop projection, annular stop projection can slip in protecting tube tube chamber, and coordinate with described limited step is spacing.
Safety self-destructing venoclysis needle of the present invention, its operation principle is: before use or use time, self-destruction plug is inserted in protecting tube, through self-destruction plug location shrinkage cavity location, after using, pull the transfusion end of self-destruction plug, self-destruction plug slides in protecting tube, puncture needle slips in protecting tube tube chamber, until the spacing stop of limited step in annular spacing preiection and protecting tube tube chamber on needle stand, puncture needle enters in protecting tube completely, now needle stand is located shaft part and slip into self-destruction plug location shrinkage cavity inner position, due to location shaft part axial length and self-destruction plug, to locate shrinkage cavity axial length suitable, self-destruction plug is completely pulled out of protecting tube, fracture end face and the protecting tube end face of location shaft part, the tapering point of fracture end face and the self-destruction plug of location shaft part forms the leg-of-mutton otch of a ring cross-section shape, pinch self-destruction plug on the other hand, another hands pinches protecting tube, can fracture along self-destruction plug and needle stand junction, the location shaft part of needle stand is formed the fracture flushed with protecting tube, its tool has the following advantages:
1, due to the tapering point guide effect of self-destruction plug, and when fractureing, protecting tube forms location to needle stand, protecting tube end face can form the guide effect to operation of breakage, and make operation of breakage simple, fracture is smooth, fracture flushes with protecting tube, after realization fractures, puncture needle, without exposed parts, avoids unexpected stabbing completely; Simultaneously, because needle stand fracture flushes with protecting tube, make without exposing to the operation part that protecting tube promotes puncture needle return outward, without the need to specialized designs puncture needle backing stop structure, needle stand is located shaft part and the shrinkage cavity cooperation of self-destruction plug location, have and necessarily prevent puncture needle return, transfusion needle structure is simple, easy to process;
2, the upper conical end of the structure that fractures self-destruction plug is connected with needle stand; and location shaft part and annular stop projection are set on needle stand; the location shrinkage cavity of self-destruction plug and limited step are set in protecting tube; realize fractureing of self-destruction plug; need to move puncture needle tubing to position completely, fracture could be realized and expose, reach needle tip retracts and put in place and mutually to limit with operation of breakage; reach good synergism, guarantee operation puts in place reliable.
3, realize reliable self-destruction, adopt operation of breakage, transfusion needle, without use value, avoids artificially being resetted by puncture needle the probability reused.
The present invention is set to further: described self-destruction plug is provided with stopping elastic sheet near the large end position of tapering point; stopping elastic sheet one end is fixed on self-destruction plug outer wall; the stopping elastic sheet other end is that the elastic deformation of stopping elastic sheet coordinates with protecting tube end is spacing after holding and opening along the self-destruction plug radial compressible elastic deformation's end opened.
By adopting above-mentioned stopping elastic sheet structural design, ensureing after self-destruction plug is completely pulled out of (puncture needle bounces back completely), avoiding because maloperation is by the situation of self-destruction plug toward rollback, ensure safety during operation; When stopping elastic sheet loads in protecting tube simultaneously, stopping elastic sheet elastic deformation holds elasticity to conflict on protecting tube inwall, has the close-fitting effect of self-destruction plug location, ensures that the assembling of self-destruction plug is reliable.
The present invention is set to further: coordinate one end to be provided with needle stand with needle stand in described protecting tube tube chamber and locate shrinkage cavity, and shrinkage cavity aperture, needle stand location is less than protecting tube tube chamber, and on described needle stand, annular spacing preiection is interference fitted in needle stand location shrinkage cavity.
By adopting said structure design, needle stand location is reliable, ensures that transfusion needle use procedure is safe and reliable.
The present invention is set to further: the external diameter of described annular stop projection and protecting tube tube chamber aperture adaptation.
Under adopting said structure design, ensure that puncture needle is set back in protecting tube, puncture needle fixation is reliable.
The present invention is set to further: the transfusion end of described self-destruction plug is equipped with two pass joints, and described two pass joint one end have defining flange, and two pass joint upper limit flanges coordinate with protecting tube end is spacing.
By adopt two pass joints arrange, facilitate self-destruction plug connect transfusion catheter, defining flange and protecting tube spacing, prevent self-destruction plug from promoting towards needle point direction.
The present invention is set to further: described needle stand is outer large, interior little horn mouth towards puncture needle needle point one end port, is filled with the fixing glue of fixing puncture needle tubing in horn mouth.
By adopting technique scheme, puncture needle fixation is reliable.
Below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is specific embodiment of the invention safety self-destructing venoclysis needle axonometric chart;
Fig. 2 is specific embodiment of the invention safety self-destructing venoclysis needle using state structural representation;
Fig. 3 is Fig. 2 part A partial enlarged view;
Fig. 4 is Fig. 2 part B partial enlarged view;
Fig. 5 is specific embodiment of the invention puncture needle retracted state structural representation;
Fig. 6 is Fig. 5 C part partial enlarged view;
Fig. 7 is specific embodiment of the invention safety self-destructing venoclysis needle self-destruction status architecture schematic diagram;
Fig. 8 is specific embodiment of the invention protecting tube structural representation;
Fig. 9 is specific embodiment of the invention self-destruction mandrel structure schematic diagram.
Detailed description of the invention
As shown in Fig. 1 ~ 9, a kind of safety self-destructing venoclysis needle disclosed by the invention, includes protecting tube 1, puncture needle 2, self-destruction plug 3 and needle stand 4; Fin 5 is provided with outside described protecting tube 1, protecting tube 1 is the sleeve pipe of hollow, and self-destruction plug 3 to be inserted in protecting tube 1 slidably, and self-destruction plug 3 one end is the transfusion end connecting transfusion catheter, the transfusion end of self-destruction plug 3 passes protecting tube 1, and self-destruction plug 3 other end connects described needle stand 4; Puncture needle 2 is arranged on needle stand 4.
Described self-destruction plug 3 is one-body molded with needle stand 4, and self-destruction plug 3 is connected one end end with needle stand 4 is taper, and on self-destruction plug 3, this tapering point 31 is that axis is little towards needle stand 4 one end, the other end is large; Be provided with the location shrinkage cavity 11 of self-destruction plug in the tube chamber 10 of described protecting tube 1, the location shrinkage cavity 11 of self-destruction plug is positioned at one end port of protecting tube 1 tube chamber 10 corresponding self-destruction plug 3 transfusion end; Face with protecting tube 1 tube chamber 10 place of connecing in the location shrinkage cavity 11 of self-destruction plug and form limited step 12, self-destruction plug 3 and self-destruction plug locate shrinkage cavity 11 location fit, realize self-destruction plug 3 and locate close-fitting and be inserted in protecting tube 1; Described needle stand 4 is provided with the location shaft part 41 that can slip in the location shrinkage cavity 11 of self-destruction plug, it is adaptive that location shaft part 41 external diameter and self-destruction plug locate shrinkage cavity 11 aperture, it is suitable that location shaft part 41 axial length and self-destruction plug locate shrinkage cavity 11 axial length, location shaft part 41 1 end face is the end face 411 that fractures connecting described self-destruction plug tapering point 31, locate shaft part 41 fracture between end face 411 and self-destruction plug 3 through tapering point 31 Formation cross-section shape be leg-of-mutton annular incision 30; Location shaft part 41 other end is provided with annular stop projection 42; Annular stop projection 42 can slip in protecting tube 1 tube chamber, and coordinates with described limited step 12 is spacing.
For ensureing that needle stand is installed reliable; coordinate one end to be provided with needle stand with needle stand 4 in described protecting tube 1 tube chamber 10 and locate shrinkage cavity 13; shrinkage cavity 13 aperture, needle stand location is less than protecting tube 1 tube chamber 10, and on described needle stand 4, annular spacing preiection 42 is interference fitted in needle stand location shrinkage cavity 13.Shrinkage cavity location, self-destruction plug location in protecting tube is carried out in such self-destruction plug one end, and needle stand, through location, shrinkage cavity hole, needle stand location, makes puncture needle orientation assemble reliable.For ensureing that puncture needle is set back in protecting tube, puncture needle fixation is reliable, the external diameter of annular stop projection and protecting tube tube chamber aperture adaptation.
On the transfusion end of self-destruction plug 3, plug-in mounting is furnished with two pass joints 33, and described two pass joint 33 one end have defining flange 331, and two pass joint 33 upper limit flanges 331 coordinate with protecting tube 1 end is spacing; Two pass joints both conveniently connect transfusion catheter, can prevent again self-destruction plug from promoting towards needle point direction, reach and use reliably.
Wherein, described self-destruction plug 3 is provided with stopping elastic sheet 34 near the large end position of tapering point 31; stopping elastic sheet 34 one end is fixed on self-destruction plug 3 outer wall; stopping elastic sheet 34 other end is that the elastic deformation of stopping elastic sheet 34 coordinates with protecting tube 1 end is spacing after holding and opening along the self-destruction plug 3 radial compressible elastic deformation's end opened.Elastic deformation's end of stopping elastic sheet 34 is loaded in protecting tube 1 tube chamber 10 by compression, has the close-fitting effect of self-destruction plug location, ensures that the assembling of self-destruction plug is reliable; Stopping elastic sheet 34 is that on self-destruction plug 3, circumference is evenly distributed with some stopping elastic sheets 34 axially towards puncture needle 2 needle point one end inclination warpage.After self-destruction plug 3 is completely pulled out of (puncture needle bounces back completely), stopping elastic sheet 34 is spacing with protecting tube 1 end, avoids because maloperation is by the situation of self-destruction plug toward rollback, ensures safety during operation.
In this specific embodiment, described needle stand 4 is outer large, interior little horn mouth 43 towards puncture needle 2 needle point one end port, is filled with the fixing glue of fixing puncture needle tubing 2 in horn mouth 43.
Safety self-destructing venoclysis needle of the present invention, its operation principle is: before use or use time, self-destruction plug is inserted in protecting tube, through self-destruction plug location shrinkage cavity, stopping elastic sheet and needle stand location shrinkage cavity location.
After using, pull the transfusion end of self-destruction plug, self-destruction plug slides in protecting tube, puncture needle slips in protecting tube tube chamber, until the spacing stop of limited step in annular spacing preiection and protecting tube tube chamber on needle stand, puncture needle enters in protecting tube completely, now needle stand is located shaft part and slip into self-destruction plug location shrinkage cavity inner position, due to location shaft part axial length and self-destruction plug, to locate shrinkage cavity axial length suitable, self-destruction plug is completely pulled out of protecting tube, fracture end face and the protecting tube end face of location shaft part, the tapering point of fracture end face and the self-destruction plug of location shaft part forms the leg-of-mutton otch of a ring cross-section shape, pinch self-destruction plug on the other hand, another hands pinches protecting tube, can fracture along self-destruction plug and needle stand junction, the location shaft part of needle stand is formed the fracture flushed with protecting tube.Its tool has the following advantages:
1, due to the tapering point guide effect of self-destruction plug, and when fractureing, protecting tube forms location to needle stand, protecting tube end face can form the guide effect to operation of breakage, and make operation of breakage simple, fracture is smooth, fracture flushes with protecting tube, after realization fractures, puncture needle, without exposed parts, avoids unexpected stabbing completely; Simultaneously, because needle stand fracture flushes with protecting tube, make without exposing to the operation part that protecting tube promotes puncture needle return outward, without the need to specialized designs puncture needle backing stop structure, needle stand is located shaft part and self-destruction plug location shrinkage cavity, annular stop projection coordinate with protecting tube tube chamber, have and necessarily prevent puncture needle return, transfusion needle structure is simple, easy to process;
2, the upper conical end of the structure that fractures self-destruction plug is connected with needle stand; and location shaft part and annular stop projection are set on needle stand; the location shrinkage cavity of self-destruction plug and limited step are set in protecting tube; realize fractureing of self-destruction plug; need to move puncture needle tubing to position completely, fracture could be realized and expose, reach needle tip retracts and put in place and mutually to limit with operation of breakage; reach good synergism, guarantee operation puts in place reliable.
3, realize reliable self-destruction, adopt operation of breakage, transfusion needle, without use value, avoids artificially being resetted by puncture needle the probability reused.
Claims (8)
1. a safety self-destructing venoclysis needle, include protecting tube, puncture needle, self-destruction plug and needle stand, fin is provided with outside described protecting tube, protecting tube is the sleeve pipe of hollow, self-destruction plug to be inserted in protecting tube slidably, self-destruction plug one end is the transfusion end connecting transfusion catheter, the transfusion end of self-destruction plug passes protecting tube, the self-destruction plug other end connects described needle stand, puncture needle is arranged on needle stand, it is characterized in that: described self-destruction plug and needle stand one-body molded, self-destruction plug is connected one end end with needle stand is taper, on self-destruction plug, this tapering point is axially little towards needle stand one end, the other end is large, the location shrinkage cavity of self-destruction plug is provided with in the tube chamber of described protecting tube, the location shrinkage cavity of self-destruction plug is positioned at one end port of protecting tube tube chamber corresponding self-destruction plug transfusion end, the location shrinkage cavity of self-destruction plug and protecting tube tube chamber face the place of connecing and form limited step, self-destruction plug and self-destruction plug locate shrinkage cavity location fit, described needle stand is provided with the location shaft part that can slip in the location shrinkage cavity of self-destruction plug, it is adaptive that location shaft part external diameter and self-destruction plug locate shrinkage cavity aperture, it is suitable that location shaft part axial length and self-destruction plug locate shrinkage cavity axial length, face, shaft part one end, location is the end face that fractures connecting described self-destruction plug tapering point, location shaft part fracture between end face and self-destruction plug through tapering point Formation cross-section shape be leg-of-mutton annular incision, the location shaft part other end is provided with annular stop projection, annular stop projection can slip in protecting tube tube chamber, and coordinate with described limited step is spacing.
2. safety self-destructing venoclysis needle according to claim 1; it is characterized in that: described self-destruction plug is provided with stopping elastic sheet near the large end position of tapering point; stopping elastic sheet one end is fixed on self-destruction plug outer wall; the stopping elastic sheet other end is that the elastic deformation of stopping elastic sheet coordinates with protecting tube end is spacing after holding and opening along the self-destruction plug radial compressible elastic deformation's end opened.
3. safety self-destructing venoclysis needle according to claim 1 or 2; it is characterized in that: coordinate one end to be provided with needle stand with needle stand in described protecting tube tube chamber and locate shrinkage cavity; shrinkage cavity aperture, needle stand location is less than protecting tube tube chamber, and on described needle stand, annular spacing preiection is interference fitted in needle stand location shrinkage cavity.
4. safety self-destructing venoclysis needle according to claim 1 or 2, is characterized in that: the external diameter of described annular stop projection and protecting tube tube chamber aperture adaptation.
5. safety self-destructing venoclysis needle according to claim 3, is characterized in that: the external diameter of described annular stop projection and protecting tube tube chamber aperture adaptive.
6. safety self-destructing venoclysis needle according to claim 1 or 2; it is characterized in that: the transfusion end of described self-destruction plug is equipped with two pass joints; described two pass joint one end have defining flange, and two pass joint upper limit flanges coordinate with protecting tube end is spacing.
7. safety self-destructing venoclysis needle according to claim 3, it is characterized in that: the transfusion end of described self-destruction plug is equipped with two pass joints, described two pass joint one end have defining flange, and two pass joint upper limit flanges coordinate with protecting tube end is spacing.
8. safety self-destructing venoclysis needle according to claim 1, is characterized in that: described needle stand is outer large, interior little horn mouth towards puncture needle needle point one end port, is filled with the fixing glue of fixing puncture needle tubing in horn mouth.
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| CN201410787413.9A CN104436364B (en) | 2014-12-17 | 2014-12-17 | A kind of safety self-destructing intravenous infusion needle |
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| CN201410787413.9A CN104436364B (en) | 2014-12-17 | 2014-12-17 | A kind of safety self-destructing intravenous infusion needle |
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| CN104436364B CN104436364B (en) | 2017-07-28 |
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| CN104887250A (en) * | 2015-04-28 | 2015-09-09 | 顶一医疗科技（昆山）有限公司 | Disposable safe blood-sampling puncturing-preventing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887250A (en) * | 2015-04-28 | 2015-09-09 | 顶一医疗科技（昆山）有限公司 | Disposable safe blood-sampling puncturing-preventing device |
| CN104887250B (en) * | 2015-04-28 | 2018-04-10 | 顶一医疗科技（昆山）有限公司 | A kind of disposable safe blood sampling Needlestick prevention device |
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| CN104436364B (en) | 2017-07-28 |
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