CN101195051B - Safe self-breaking syringe - Google Patents
Safe self-breaking syringe Download PDFInfo
- Publication number
- CN101195051B CN101195051B CN2006100706782A CN200610070678A CN101195051B CN 101195051 B CN101195051 B CN 101195051B CN 2006100706782 A CN2006100706782 A CN 2006100706782A CN 200610070678 A CN200610070678 A CN 200610070678A CN 101195051 B CN101195051 B CN 101195051B
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- China
- Prior art keywords
- needle holder
- hole
- overcoat
- piston
- core bar
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000006378 damage Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 239000012467 final product Substances 0.000 description 3
- 206010011409 Cross infection Diseases 0.000 description 2
- 206010029803 Nosocomial infection Diseases 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The invention relates to a safety self-destruction syringe, comprising an outer shell, a needle stand, a sealing ring, a piston, and a core rod, and is characterized in that the needle stand is moveably mounted in a cylindrical hole arranged on the front portion of the outer shell, a plurality of projecting slide blocks with slide-ways are arranged on the external circumference, a plurality of cylindrical bosses are correspondingly arranged on the inner circumference of the cylindrical hole, backstop tables are further arranged on the rear portion of the projecting slide blocks, the rear portion of a center through-hole of the needle stand is a horn-type cavity, a plurality of wing tooth slices are internally and axially arranged, the front portion of the core rod passes through the piston, a projecting portion can be coincidently inserted in the horn-type cavity, the front end is provided with an elastic draw hook which is engaged with a groove in the center through-hole of the needle stand, and the rear root portion is axially provided with a plurality of wing tooth slices which are engaged with the wing tooth slices arranged on the rear portion of the center through-hole of the needle stand for driving the needle stand to rotate. The invention is rational in construction, convenient in utilization, simple in assembling and technology, good in safety performance, and reliable in destruction function, and can be self-destructed after being one-time injected.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, specifically a kind of safe self-breaking syringe.
Background technology
We know that disposable syringe generally comprises syringe needle, overcoat, piston, push rod etc.But existing disposable syringe belongs to managerial notion, is not " disposable " on the serviceability, can repeated multiple times use, and leaves hidden danger to cross infection, and propagation tends to produce the disease of.In addition, injection finishes in processing procedure subsequently, because outside syringe needle was exposed to mostly, very easily thorn scratched hospitalized patients, causes new cross infection.In recent years, people research and develop out many kinds of self-destruction syringes or destructing safety formula syringe, wherein important composition architecture advances comprises: one, be provided with cylindrical hole at the syringe jacket front end, needle holder is to slide and packs in the cylindrical hole, realize airtight by sealing ring, the needle holder rear end is the puncture cone of band handle, needle holder can be drawn in the overcoat together with injection needle during use, a kind of self-destroy safety injector as Chinese patent 00205827.8 discloses, by overcoat, needle holder, sealing ring, rubber piston and push rod are formed, the overcoat front end has cylindrical hole, and needle holder is to slide and packs in the overcoat cylindrical hole, realizes airtight by sealing ring, the needle holder rear end is the puncture cone of band handle, be easy to wear out the rubber piston thin film region at the injection terminal point, agree with, needle holder is drawn in the overcoat together with injection needle with the collet of push rod front end in the piston, can realize disposable use self-destruction like this, but it assembles difficulty, and to the strictness of sealing ring dimensional requirement, serviceability is stable inadequately; Two, rubber piston and push rod are provided with thin film region or weak area, wear out or fracture being convenient to, and realize self-destruction; Three, snap ring is equipped with in the overcoat rear end, the outer casing inner wall circumference is provided with two boss, the snap ring intermediate circumference is provided with the retaining boss of band tapering, be axially arranged with open slot on the front walls, the snap ring inside circumference also is provided with the core bar locating slot, correspondingly be provided with positioning boss between weak area and the push pedal on the core bar, adopt snap ring locking core bar, piston, entry needle etc., after injection finishes, core bar, piston etc. can not move forward, can not pull back, Chinese patent 02212891.3 discloses a kind of like this self-destruction syringe of band clasp structure.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, provides a kind of structure reasonable, and easy to use, simple for assembly process, security performance is good, gets final product self-destruction after the shot, the safe self-breaking syringe of damage reliable in function.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of safe self-breaking syringe, it comprises overcoat, needle holder, sealing ring, piston, core bar, there is cylindrical hole the overcoat front portion, needle holder is movably arranged in the anterior cylindrical hole of overcoat, which is provided with sealing ring, piston is fixed on the core bar front portion, it is characterized in that: the needle holder exterior periphery is provided with the protrusion slide block of several band slideways, correspondingly be provided with the several cylinders boss on the anterior cylindrical hole inwall of the overcoat circumference, protruding slide block can relatively move around cylinder boss, protrude the slide block rear portion and also be provided with stopping-receding bench, be circumferentially with groove in the needle holder central through hole, the central through hole rear portion is tubaeform cavity, be axially arranged with several wing tooth sheets in it, piston is passed in the core bar front portion, ledge can insert in the tubaeform cavity in needle holder central through hole rear portion with matching, front end is provided with the elastic draw hook that cooperates with needle holder central through hole further groove, back root part is axially arranged with several wing tooth sheets, its wing tooth sheet with needle holder central through hole postmedian cooperates, and drives needle holder and rotates.
The protrusion slide block that needle holder exterior periphery of the present invention is provided with is a right angled triangle, and its hypotenuse is a slideway, and the place, right angle is provided with square or the rectangle stopping-receding bench.
Needle holder of the present invention rear portion is provided with the dovetail type boss, and the rear end of the anterior cylindrical hole of overcoat is provided with the boss that is mated, and prevents that needle holder from extruding from front end, and easy to assembly, and dimensional requirement is lower.The elastic draw hook top of the anterior ledge of core bar is hypotenuse.It acts on and is and the needle holder groove fit on the one hand, draws in needle holder in overcoat, on the other hand by the hypotenuse location of band tapering, makes to draw in the interior needle holder run-off the straight of overcoat, can not stretch out overcoat again.
Needle holder of the present invention is provided with the protrusion slide block of band slideway, is provided with groove and some wing tooth sheets in the needle holder central through hole, and the core bar front portion is provided with elastic draw hook and wing tooth sheet, needle holder can be drawn in the overcoat rotatably by core bar.After injection finishes like this, retract core bar, just needle holder can be drawn in the overcoat, they can not be moved forward again.Against existing technologies, the present invention constructs rationally, and is easy to use, simple for assembly process, and security performance is good, gets final product self-destruction after the shot, and the damage reliable in function is a kind of ideal safe self-breaking syringe.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of needle holder of the present invention;
Fig. 3 is the elevational schematic view of Fig. 2;
Fig. 4 is a core bar ledge enlarged diagram before the piston of the present invention.
Number in the figure 1. overcoats, 2. needle holder, 3. sealing ring, 4. piston, 5. core bar, 11. cylindrical holes, 12. cylinder boss, 13. boss, 21. protrude slide block, 22. slideway, 23. stopping-receding bench, 24. grooves, 25. wing tooth sheet, 26. tubaeform cavitys, 27. dovetail type boss, 51. elastic draw hook, 52. wing tooth sheets, 53. hypotenuses.
The specific embodiment
As can be seen from Figure 1, a kind of safe self-breaking syringe, it comprises overcoat 1, needle holder 2, sealing ring 3, piston 4, core bar 5, there is cylindrical hole 11 overcoat 1 front portion, needle holder 2 is and is slidingly mounted in the overcoat 1 anterior cylindrical hole 11, which is provided with sealing ring 3, realizes airtight by sealing ring 3.Needle holder 2 front ends connect entry needle.Needle holder 2 of the present invention is the round screw thread seat, and the entry needle syringe needle is rotatable to be assemblied in the spiral base.Piston 4 is fixed on core bar 5 front portions, can move in overcoat 1 under core bar 5 drives, and takes out injection liquid.Core bar 5 of the present invention and on push pedal between be provided with weak area in the connection separate so that damage.
Characteristics of the present invention are that needle holder 2 exterior periphery are provided with the protrusion slide block 21 of several band slideways 22, correspondingly are provided with several cylinders boss 12 on the anterior cylindrical hole inwall of the overcoat circumference.From Fig. 1, Fig. 2, can find out, be provided with the protrusion slide block 21 of four band slideways 22 on needle holder 2 exterior periphery equably, correspondingly be provided with four cylinder boss 12 on the anterior cylindrical hole inwall of the overcoat circumference.The protrusion slide block 21 that the needle holder exterior periphery is provided with is right angled triangle, and its hypotenuse is a slideway 22, protrudes slide block 21 rear portions and also is provided with stopping-receding bench 23, specifically is to be provided with square or rectangle stopping-receding bench 23 at the place, right angle of right angled triangle protrusion slide block 21.Needle holder 2 is under core bar 5 drives, and the protrusion slide block 21 on it can relatively move around cylinder boss 12.Needle holder 2 is produced when installing, needle holder 2 exterior periphery right angled triangles protrude space, slide block 21 hypotenuse top can not stopped with cylinder boss 12 formation on the overcoat 1 anterior cylindrical hole 11 inwall circumference, when hypotenuse slideway 22 contacts with cylinder boss 12, hypotenuse slideway 22 is stressed, when pushing ahead, it is stressed to turn left automatically, and the stopping-receding bench 23 on the needle holder 2 engages the location with cylinder boss 12.That is to say that needle holder 2 advances when installing, any angle can not be subjected to stopping of cylinder boss 12, and is easy for installation, reliable.After being installed to design attitude, cylinder boss 12 just in time is fastened on stopping-receding bench 23 rear portions, and the two cooperates the location, and needle holder 2 can not turn left and retreat, and it is installed in the anterior cylindrical hole of overcoat reliably.
After the present invention's injection finished, the mobile of needle holder 2 realized by following structural design.Specifically: be circumferentially with groove 24 in needle holder 2 central through holes, the central through hole rear portion is tubaeform cavity 26, is axially arranged with several wing tooth sheets 25 in it, as Fig. 2, shown in Figure 3.Piston 4 is passed in core bar 5 front portions, and ledge can insert in the tubaeform cavity 26 in needle holder 2 central through hole rear portions with matching, so that residual liquor is few as far as possible in the needle holder 2.The front end of core bar 5 ledges is provided with the elastic draw hook 51 that cooperates with needle holder central through hole further groove 24 before the piston 4, and back root part is axially arranged with several wing tooth sheets 52, as shown in Figure 4.Wing tooth sheet 52 is meshing with each other with the wing tooth sheet 25 of needle holder 2 central through hole postmedians and cooperates, and rotation core bar 5 just can drive needle holder 2 and rotate thereupon.Elastic draw hook 51 tops of core bar 5 anterior ledges of the present invention are hypotenuse 53, injection finishes, advance core bar 5, elastic draw hook 51 enters in the tubaeform cavity 26 in needle holder 2 central through hole rear portions, its drag hook just in time is fastened in the groove 24, its effect is to cooperate with needle holder 2 grooves 24 on the one hand, in overcoat 1, draw in needle holder 2, locate by the hypotenuse 53 of band tapering on the other hand, make needle holder 2 run-off the straights that draw in the overcoat 1, the syringe needle that tilts stabs overcoat 1 inwall, can not stretch out overcoat again, reaches the purpose of self-destruction.
Needle holder of the present invention 2 rear portions are provided with dovetail type boss 27, and correspondingly the rear end of overcoat 1 anterior cylindrical hole 11 is provided with the boss 13 that is mated, and prevent that needle holder 2 from extruding from overcoat 1 front end, and easy to assembly, and dimensional requirement is lower.
After the present invention injection finishes, rotate and retract core bar 5, just needle holder 2 can be drawn in the overcoat, they can not be moved forward again, at this moment, the curved lightly core bar 5 that moves by itself and weak area on push pedal is connected, can realize separating self-destruction.Syringe needles etc. also are enclosed in the overcoat 1, realize disposable use.The present invention constructs rationally, and is easy to use, simple for assembly process, and security performance is good, gets final product self-destruction after the shot, and the damage reliable in function is a kind of ideal safe self-breaking syringe.
Claims (4)
1. safe self-breaking syringe, it comprises overcoat, needle holder, sealing ring, piston, core bar, there is cylindrical hole the overcoat front portion, needle holder is movably arranged in the anterior cylindrical hole of overcoat, which is provided with sealing ring, piston is fixed on the core bar front portion, it is characterized in that: the needle holder exterior periphery is provided with the protrusion slide block of several band slideways, correspondingly be provided with the several cylinders boss on the anterior cylindrical hole inwall of the overcoat circumference, protruding slide block can relatively move around cylinder boss, protrude the slide block rear portion and also be provided with stopping-receding bench, be circumferentially with groove in the needle holder central through hole, the central through hole rear portion is tubaeform cavity, be axially arranged with several wing tooth sheets in it, piston is passed in the core bar front portion, and ledge can insert in the tubaeform cavity in needle holder central through hole rear portion with matching, front end is provided with the elastic draw hook that cooperates with needle holder central through hole further groove, back root part is axially arranged with several wing tooth sheets, and its wing tooth sheet with needle holder central through hole postmedian cooperates, and drives needle holder and rotates.
2. safe self-breaking syringe as claimed in claim 1 is characterized in that: the protrusion slide block that the needle holder exterior periphery is provided with is a right angled triangle, and its hypotenuse is a slideway, and the place, right angle is provided with square or the rectangle stopping-receding bench.
3. safe self-breaking syringe as claimed in claim 1 is characterized in that: the needle holder rear portion is provided with the dovetail type boss, and the rear end of the anterior cylindrical hole of overcoat is provided with the boss that is mated.
4. safe self-breaking syringe as claimed in claim 1 is characterized in that: the elastic draw hook top of the anterior ledge of core bar is hypotenuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100706782A CN101195051B (en) | 2006-12-05 | 2006-12-05 | Safe self-breaking syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100706782A CN101195051B (en) | 2006-12-05 | 2006-12-05 | Safe self-breaking syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101195051A CN101195051A (en) | 2008-06-11 |
| CN101195051B true CN101195051B (en) | 2010-12-29 |
Family
ID=39545793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100706782A Active CN101195051B (en) | 2006-12-05 | 2006-12-05 | Safe self-breaking syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101195051B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8721599B2 (en) | 2010-07-22 | 2014-05-13 | Becton, Dickinson And Company | Dual chamber passive retraction needle syringe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2423897Y (en) * | 2000-02-24 | 2001-03-21 | 王希平 | Self-destroyed safety syringe |
| CN2518520Y (en) * | 2001-12-12 | 2002-10-30 | 山东威高集团医用高分子制品股份有限公司 | Once-used safety syringe |
| CN200973895Y (en) * | 2006-12-05 | 2007-11-14 | 山东威高集团医用高分子制品股份有限公司 | Safety self-destroyed syringe |
-
2006
- 2006-12-05 CN CN2006100706782A patent/CN101195051B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2423897Y (en) * | 2000-02-24 | 2001-03-21 | 王希平 | Self-destroyed safety syringe |
| CN2518520Y (en) * | 2001-12-12 | 2002-10-30 | 山东威高集团医用高分子制品股份有限公司 | Once-used safety syringe |
| CN200973895Y (en) * | 2006-12-05 | 2007-11-14 | 山东威高集团医用高分子制品股份有限公司 | Safety self-destroyed syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101195051A (en) | 2008-06-11 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |