CN2860502Y - Disposable safety syringe - Google Patents
Disposable safety syringe Download PDFInfo
- Publication number
- CN2860502Y CN2860502Y CN 200520125864 CN200520125864U CN2860502Y CN 2860502 Y CN2860502 Y CN 2860502Y CN 200520125864 CN200520125864 CN 200520125864 CN 200520125864 U CN200520125864 U CN 200520125864U CN 2860502 Y CN2860502 Y CN 2860502Y
- Authority
- CN
- China
- Prior art keywords
- core bar
- overcoat
- needle tubing
- piston
- tubing seat
- 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
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 26
- 238000012856 packing Methods 0.000 claims description 24
- 239000010409 thin film Substances 0.000 claims description 9
- 208000007623 Lordosis Diseases 0.000 claims description 3
- 238000001802 infusion Methods 0.000 abstract 1
- 206010011409 Cross infection Diseases 0.000 description 3
- 206010029803 Nosocomial infection Diseases 0.000 description 3
- 206010042674 Swelling Diseases 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007812 deficiency Effects 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
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a disposable safe syringe, which comprises an outer bush, a needle tube, a need tube seat, a piston and a core pin, wherein the back of the needle tube seat is a raised puncture cone with the ring, which is fixed in the outer bush through the piston ring seal, while the front end of the piston has a film district, and the front part of the push board of the core pin has a cavity; after the completion of the infusion, the push piston of the core pin and the piston ring seal will go forward, and the ring bump of the back of the needle tube seat will coordinate with the cavity of the front end of the push board of the core pin closely, pulling the needle tube seat and others back into the outer bush; the back of the outer bush has a lock loop, and the outer wall has a convex table with conical degree to stop backing, while its inner wall has a positioning groove and the core pin has a positioning convex table to coordinate with the groove. After the injection, the core pin will pull the needle tube seat and others back into the outer bush, while the lock loop will lock the core pin, so that they can neither move forward nor backward. The utility model is simple in structure, easy to use and safe; at the same time, the invention can self-destruct after the first injection.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, specifically a kind of disposable syringe safe in utilization.
Background technology
We know that syringe is a kind of medical apparatus commonly used.It generally comprises syringe, piston, push rod, syringe needle.In order to prevent cross infection, disposable use more and more is subject to people's attention.But present widely used 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.Patent 00205827.8 discloses a kind of safety injector, by syringe, needle holder, sealing ring, rubber piston and push rod are formed, the syringe front end has cylindrical hole, needle holder is to slide and packs in the syringe cylindrical hole, realize 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 the collet of push rod front end in the piston, needle holder is drawn in the syringe together with injection needle, can realize disposable use self-destruction like this, but because that syringe and needle holder are provided with step is spacing, design, it is reasonable inadequately to connect, and needle holder is easily rotated, and syringe needle can not be changed, the assembling difficulty, to the strictness of sealing ring dimensional requirement, serviceability is stable inadequately, and the debris surplus is many.Patent 01243599.6 provides a kind of disposable syringe safe in utilization, it is axially arranged with some strip bulges at overcoat nose circle post hole inwall, the sealing ring front portion correspondingly is axially arranged with some strip grooves on the needle holder outer wall, during use, needle holder can not rotated, after injection finished, the overcoat rear end also was provided with piston and push pedal locking mechanism, but this mechanism retaining performance is stable inadequately.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of simple structure is provided, and is easy to use, stable, the retaining dependable performance, and security performance is good, is the syringe disposable safe in utilization of self-destruction after the shot.
The technical scheme in the invention for solving the above technical problem is: a kind of disposable syringe safe in utilization, it comprises overcoat, needle tubing, the needle tubing seat, piston, core bar, there is cylindrical hole the overcoat front portion, piston is fixed on the core bar front portion, it is characterized in that: needle tubing seat matched in clearance runs through whole overcoat cylindrical hole, needle tubing seat rear portion is the puncture cone of band type projection, it passes the sealing packing that is provided with in the overcoat, and by the sealing packing be fixed in the overcoat, the piston nose face is provided with thin film region, the anterior part that connects piston of core bar push pedal is provided with cavity, inject at the end, needle tubing seat rear portion puncture cone is worn out piston nose face thin film region, and core bar promotes piston and the sealing packing moves forward, the cavity tight fit of the ring-like projection at needle tubing seat rear portion and core bar push pedal front end is drawn in the needle tubing seat in the overcoat together with needle tubing; The overcoat rear portion is equipped with locking ring, its outer wall circumference is provided with the retaining boss of band tapering, correspondingly be provided with a retaining boss that is mated on the outer casing inner wall circumference, also be provided with detent on the locking ring inwall circumference, correspondingly be provided with a positioning boss that is mated on the core bar.
Sealing packing described in the utility model is installed in the groove that the front portion is provided with in the overcoat, is the curved-surface structure of lordosis recurve, the centre be axially arranged with one with the friction tight centre bore of the ring-like projection in needle tubing seat rear portion.
Piston nose face shape described in the utility model is consistent with sealing packing rear end face shape.
Needle tubing seat described in the utility model front portion is provided with ring shaped step, and overcoat cylindrical hole front portion is provided with the door of band centre bore.
Locking ring described in the utility model rear portion is provided with cross core bar gathering sill.
Core bar described in the utility model is provided with a frangibility weak area.
Positioning boss on the core bar described in the utility model is between push pedal and weak area.
The rear portion of push pedal has radian on the core bar described in the utility model, the corresponding cancave cambered surface that is provided with of locking ring front inner wall circumference.
This utility model overcoat front portion is movably installed with the needle tubing seat of band needle tubing, be provided with the sealing packing in the overcoat, the cavity that the push rod front end is provided with can with needle tubing seat rear portion tight fit, the overcoat rear portion also is equipped with locking ring, against existing technologies, after injection finishes, needle tubing seat rear portion puncture cone is worn out piston nose face thin film region, the cavity tight fit of ring-like projection on the needle tubing seat and core bar push rod front end, pulling core bar, can drive the needle tubing seat and move backward, the needle tubing seat is drawn in the overcoat together with injection needle; Then, they can not be moved forward, can not pull back by locking ring locking core bar, and the core bar that can fracture by the weak area on the core bar.Can realize self-destruction after the shot, the damage reliable in function, this utility model simple structure, easy to use, stable, security performance is good.
Description of drawings
Below in conjunction with accompanying drawing this utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of this utility model injection finishing state;
Fig. 3 is the structural representation that the swelling state is removed in this utility model injection back;
Fig. 4 is the structural representation that this utility model is scrapped state
Fig. 5 is the structural representation of this utility model core bar.
Fig. 6 is the structural representation of this utility model locking ring
1. needle tubings among the figure, 2. needle tubing seat, 3. sealing packing, 4. piston, 5. overcoat, 6. core bar, 7. locking ring.
The specific embodiment
As can be seen from Figure 1, a kind of disposable syringe safe in utilization of this utility model, it comprises overcoat 5, needle tubing 1, needle tubing seat 2, piston 4, core bar 6, needle tubing 1 rear portion is fixed in the middle of the needle tubing seat 2, is installed in overcoat 5 front portions, and there is cylindrical hole 52 overcoat 5 front portions, piston 4 is better elastic bodies, it is fixed on core bar 6 front portions, and integral body is positioned at overcoat, draws, pushes away core bar and finish the suction of injection, injection.Above-mentioned composition of this utility model and prior art are basic identical, are not giving unnecessary details.
It can also be seen that from Fig. 1 this utility model needle tubing seat 2 matched in clearance run through whole overcoat cylindrical hole 52, needle tubing seat 2 rear portions are puncture cones 21 of band type projection 22.Be provided with sealing packing 3 in the overcoat, sealing packing 3 described in the utility model is installed in the groove 54 that the front portion is provided with in the overcoat, is the curved-surface structure of lordosis recurve, and like this, it can be moved forward by thrust, and can not move backward.Be axially arranged with a centre bore in the middle of the sealing packing 3.Puncture cone 21 on the needle tubing seat 2 passes sealing packing 3 in overcoat 5, needle tubing seat rear portion ring-like protruding 22 and the centre bore tight fit that seals packing 3, and needle tubing seat 2 is fixed in the overcoat by sealing packing 3.Piston 4 front end faces are provided with thin film region 41, and the push pedal 61 anterior parts that connect piston on the core bar 6 are provided with cavity 62, inject at the end, and needle tubing seat 2 rear portions puncture cone 21 is worn out piston nose face thin film region 41, as shown in Figure 2; Continue to promote forward core bar 6, core bar 6 promotes piston 4 and 3 reaches of sealing packing, ring-like protruding 22 of needle tubing seat 2 rear portions break away from the centre bore of sealing packing 3, the swelling stationary state of 3 pairs of needle tubing seats 2 of depressurization packing, then, cavity 62 tight fits of ring-like protruding 22 and core bar push pedal 61 front ends at needle tubing seat rear portion, as shown in Figure 3.Pull back core bar 6, can drive needle tubing seat 2 and move backward, needle tubing seat 2 is drawn in the overcoat together with injection needle 1.
Piston 4 front end face shapes described in the utility model are consistent with sealing packing 3 rear end face shapes.Can reduce the residual quantity of injecting fluid like this.
Needle tubing seat described in the utility model 2 front portions are provided with ring shaped step 23, and overcoat cylindrical hole front portion is provided with the door 51 of band centre bore.Door 51 can with overcoat 5 integrative-structures, also in addition part be connected overcoat 5 cylindrical holes 52 front portions.As Fig. 1, shown in Figure 4.Like this can be effectively with needle tubing seat 2 fixed constraints in overcoat, guarantee that it can not move forward.
From Fig. 1, Fig. 6 etc., it can also be seen that this utility model overcoat 5 rear ends also are equipped with locking ring 7.Its outer wall circumference is provided with the retaining boss 71 of band tapering, correspondingly be provided with a retaining boss 53 that is mated on the overcoat 5 inwall circumference, locking ring 7 rear portions are the expansion of certain taper, be fastened on the rear port of overcoat 5, they cooperatively interact, install and fix locking ring 7, locking ring 7 can not be moved forward, can not retreat.Consider the needs of installation, locking ring 7 adopts two semi-circular structures of split, and its rear end is provided with the cross gathering sill, and the cross gusset on the core bar 6 can move along its axis.
Also be provided with detent 76 on this utility model locking ring 7 inwall circumference, correspondingly be provided with a positioning boss that is mated 63 on the core bar 6, core bar 6 described in the utility model is provided with a frangibility weak area 64, damages so that separate.As shown in Figure 5.Positioning boss 63 is between push pedal 61 and weak area 64.
Push pedal 61 rear portions have radian on this utility model core bar 6, the corresponding cancave cambered surface that is provided with of locking ring 7 front inner wall circumference.When pulling back core bar 6 to certain position, the push pedal 61 of rear portion band radian can enter locking ring 7 front ports, the expansion of locking ring 7 front ports, the positioning boss 63 of core bar 6 is fastened in the detent 72 of locking ring 7, at this moment, 71 swellings of locking ring retaining boss are before the retaining boss 53 of outer casing inner wall, and core bar 6 etc. are locked, can not advance, can not retreat.
Among Fig. 5, also be provided with elasticity limiting plate 65 on the cross gusset of core bar 6.Elasticity limiting plate 65 and core bar 6 integrative-structures, the cross gusset of core bar 6 is provided with a notch, and elasticity limiting plate 65 rear portions link to each other with the gusset at notch rear portion, add man-hour, make connecting portion have certain elasticity.Elasticity limiting plate 65 front portions are provided with a boss, and the short place of boss height flushes with gusset, and projection may be stuck in locking ring 7 rear portions.During assembling, elasticity limiting plate 65 is used for limiting core bar 6 and enters position in the overcoat 5.During injection, utilize the elasticity of itself, upwards or lift elasticity limiting plate 65 backward, its restriction is disengaged, and just can realize injecting normally having used.
When this utility model uses, promote core bar 6 forward, utilize piston 4 better elastic, promotion, injecting fluid, after injection finished, needle tubing seat 2 rear portions puncture cone 21 was worn out piston 4 front end face thin film regions 41, and core bar 6 promotes piston 4 and 3 reaches of sealing packing, ring-like protruding 22 of needle tubing seat 2 rear portions break away from the centre bore of sealing packings 3, so with cavity 62 tight fits of core bar push pedal 61 front ends.Pull back core bar 6, can drive needle tubing seat 2 and move backward, needle tubing seat 2 is drawn in the overcoat together with injection needle 1.Continue to pull back core bar 6, when pulling back core bar 6 to certain position, the positioning boss 63 of core bar 6 tightly is fastened in the detent 72 of locking ring 7, and lock piston and core bar can not move forward them, can not pull back.At this moment, can realize separating self-destruction by the weak area on the core bar 6 64 core bar that fractures, whole needle holder etc. are enclosed in the overcoat, as shown in Figure 4.Can realize self-destruction after the shot, realize real disposable use.
Claims (9)
1. disposable syringe safe in utilization, it comprises overcoat, needle tubing, the needle tubing seat, piston, core bar, there is cylindrical hole the overcoat front portion, piston is fixed on the core bar front portion, it is characterized in that: needle tubing seat matched in clearance runs through whole overcoat cylindrical hole, needle tubing seat rear portion is the puncture cone of band type projection, it passes the sealing packing that is provided with in the overcoat, and by the sealing packing be fixed in the overcoat, the piston nose face is provided with thin film region, the anterior part that connects piston of core bar push pedal is provided with cavity, inject at the end, needle tubing seat rear portion puncture cone is worn out piston nose face thin film region, and core bar promotes piston and the sealing packing moves forward, the cavity tight fit of the ring-like projection at needle tubing seat rear portion and core bar push pedal front end is drawn in the needle tubing seat in the overcoat together with injection needle; The overcoat rear portion is equipped with locking ring, its outer wall circumference is provided with the retaining boss of band tapering, correspondingly be provided with a retaining boss that is mated on the outer casing inner wall circumference, also be provided with detent on the locking ring inwall circumference, correspondingly be provided with a positioning boss that is mated on the core bar.
2. disposable syringe safe in utilization according to claim 1 is characterized in that: described sealing packing is installed in the overcoat anterior, is the curved-surface structure of lordosis recurve, the centre be axially arranged with one with the friction tight centre bore of the ring-like projection in needle tubing seat rear portion.
3. disposable syringe safe in utilization according to claim 1 is characterized in that: described piston nose face shape is consistent with sealing packing rear end face shape.
4. disposable syringe safe in utilization according to claim 1 is characterized in that: described needle tubing seat front portion is provided with ring shaped step, and overcoat cylindrical hole front portion is provided with the door of band centre bore.
5. disposable syringe safe in utilization according to claim 1 is characterized in that: described locking ring rear portion is provided with cross core bar gathering sill.
6. disposable syringe safe in utilization according to claim 1 is characterized in that: also be provided with the elasticity limiting plate on the cross gusset of described core bar.
7. disposable syringe safe in utilization according to claim 1 is characterized in that: described core bar is provided with a frangibility weak area.
8. disposable syringe safe in utilization according to claim 1, it is characterized in that: the positioning boss on the described core bar is between push pedal and weak area.
9. disposable syringe safe in utilization according to claim 1, it is characterized in that: the rear portion of push pedal has radian on the described core bar, the corresponding cancave cambered surface that is provided with of locking ring front inner wall circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520125864 CN2860502Y (en) | 2005-12-10 | 2005-12-10 | Disposable safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520125864 CN2860502Y (en) | 2005-12-10 | 2005-12-10 | Disposable safety syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2860502Y true CN2860502Y (en) | 2007-01-24 |
Family
ID=37658130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520125864 Expired - Lifetime CN2860502Y (en) | 2005-12-10 | 2005-12-10 | Disposable safety syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2860502Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009140801A1 (en) * | 2008-05-22 | 2009-11-26 | Lin Zuoqian | New safe latching type self-destroying syringe |
-
2005
- 2005-12-10 CN CN 200520125864 patent/CN2860502Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009140801A1 (en) * | 2008-05-22 | 2009-11-26 | Lin Zuoqian | New safe latching type self-destroying syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070124 |
|
| EXPY | Termination of patent right or utility model |