CN200973895Y - Safety self-destroyed syringe - Google Patents
Safety self-destroyed syringe Download PDFInfo
- Publication number
- CN200973895Y CN200973895Y CN 200620161387 CN200620161387U CN200973895Y CN 200973895 Y CN200973895 Y CN 200973895Y CN 200620161387 CN200620161387 CN 200620161387 CN 200620161387 U CN200620161387 U CN 200620161387U CN 200973895 Y CN200973895 Y CN 200973895Y
- Authority
- CN
- China
- Prior art keywords
- needle holder
- hole
- overcoat
- piston
- core bar
- Prior art date
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 5
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000012467 final product Substances 0.000 description 3
- 206010011409 Cross infection Diseases 0.000 description 2
- 206010029803 Nosocomial infection Diseases 0.000 description 2
- 238000005516 engineering process Methods 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
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a safety self-disposable syringe, which comprises a sleeve, a syringe needle holder, a gasket ring, a piston and a core rod, wherein the syringe needle holder is moveably arranged into a cylindrical hole at a front end of the sleeve. An external circumference of the sleeve is provided with a plurality of convex slide blocks. In addition, a plurality of cylindrical convex parts are correspondingly positioned on a circumference of the internal wall of the cylindrical hole. A retaining table is arranged on a backside of the convex slide block. A back end of a central thru hole on the syringe needle holder is provided with a trumpet cavity. A plurality of wing blades are internally and axially positioned in the cavity. A foreside of the core rod is arranged through the piston and a convex part of the core rod is correspondingly inserted into the trumpet cavity. Moreover, the foreside of the core rod is provided with an elastic drag hook to match a groove in the thru hole on the syringe needle holder. The backside of the core rod is axially provided with a plurality of wing blades, which match wing blades in the back of the central thru hole of the syringe needle holder to drive the needle to rotate. The utility model has the advantages of rational structure, easy operation, simple assembling technique, high safety performance, self-disposal upon one-off use and reliable disposal function.
Description
Technical field
This utility model 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 in the utility model 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 in the invention for solving the above technical problem 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 O-ring seal, 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 this utility model 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.
This utility model 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, 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.
This utility model needle holder 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, this utility model structure is reasonable, and easy to use, simple for assembly process, 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
Below in conjunction with accompanying drawing this utility model is further specified.
Fig. 1 is this utility model structural representation;
Fig. 2 is the structural representation of this utility model needle holder;
Fig. 3 is the elevational schematic view of Fig. 2;
Fig. 4 is a core bar ledge enlarged diagram before this utility model piston.
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 O-ring seal 3, realizes airtight by sealing ring 3.Needle holder 2 front ends connect entry needle.This utility model needle holder 2 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.This utility model core bar 5 and on push pedal between be provided with weak area in the connection separate so that damage.
Characteristics of the present utility model 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 this utility model 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 this utility model core bar 5 anterior ledges 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.
This utility model needle holder 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 this utility model 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.This utility model structure is reasonable, and easy to use, simple for assembly process, 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, 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 O-ring seal, 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 |
|---|---|---|---|
| CN 200620161387 CN200973895Y (en) | 2006-12-05 | 2006-12-05 | Safety self-destroyed syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620161387 CN200973895Y (en) | 2006-12-05 | 2006-12-05 | Safety self-destroyed syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200973895Y true CN200973895Y (en) | 2007-11-14 |
Family
ID=38900188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620161387 Expired - Lifetime CN200973895Y (en) | 2006-12-05 | 2006-12-05 | Safety self-destroyed syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200973895Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195051B (en) * | 2006-12-05 | 2010-12-29 | 山东威高集团医用高分子制品股份有限公司 | Safe self-breaking syringe |
| CN105288800A (en) * | 2015-12-01 | 2016-02-03 | 辛莉 | Safe syringe |
-
2006
- 2006-12-05 CN CN 200620161387 patent/CN200973895Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195051B (en) * | 2006-12-05 | 2010-12-29 | 山东威高集团医用高分子制品股份有限公司 | Safe self-breaking syringe |
| CN105288800A (en) * | 2015-12-01 | 2016-02-03 | 辛莉 | Safe syringe |
| CN105288800B (en) * | 2015-12-01 | 2018-06-05 | 辛莉 | Safety injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20071114 Effective date of abandoning: 20061205 |