CN203043175U - Needle cylinder structure of disposable syringe - Google Patents
Needle cylinder structure of disposable syringe Download PDFInfo
- Publication number
- CN203043175U CN203043175U CN 201220626985 CN201220626985U CN203043175U CN 203043175 U CN203043175 U CN 203043175U CN 201220626985 CN201220626985 CN 201220626985 CN 201220626985 U CN201220626985 U CN 201220626985U CN 203043175 U CN203043175 U CN 203043175U
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- China
- Prior art keywords
- syringe
- bulge loop
- hollow cylinder
- cylinder structure
- push rod
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Abstract
The utility model discloses a needle cylinder structure of a disposable syringe. The needle cylinder structure comprises a hollow cylinder body, wherein an annular groove which is matched with a limiting step on a push rod is formed in the internal wall of the hollow cylinder body near the rear end of the hollow cylinder body. The needle cylinder structure is characterized in that the groove wall of the annular groove consists of a front convex ring and a rear convex ring, wherein the rear convex ring is 0.25-0.35 mm higher than the front convex ring. According to the needle cylinder structure of the disposable syringe, due to the height difference between the front convex ring and the rear convex ring, the push rod is difficult to pull out during use in the case of not destructing the hollow cylinder body, and the disposable use safety of the syringe is guaranteed, so that the avoidance of cross infection is favored.
Description
Technical field
This utility model relates to a kind of disposable syringe, is specifically related to a kind of syringe cylinder structure of disposable syringe.
Background technology
Growing along with medical industry, hygienic requirements to medical apparatus and instruments is also more and more higher, syringe has accounted for a very big part in medical apparatus and instruments, for avoiding to the input of the mankind or animal or cross infection taking place when taking out medium, disposable syringe already is extensive use of at modern medicine as the medical apparatus and instruments of routine, namely handles as hospital refuse after using.
Syringe usually by a hollow barrel, be installed in push rod in the hollow barrel, the syringe needle of deciding the journey piston and being positioned at the push rod front end that is fitted in the syringe forms, syringe inwall and piston interference fit form enclosed space, liquid are sucked or releases syringe.In the prior art, extract piston out syringe when pulling back for anti-throw-out lever, back end of syringe (with respect to syringe needle) inwall is provided with annular groove, the both sides of annular groove form spacing preiection, the height of projection of described both sides spacing preiection is identical, the push rod front end is provided with the limited step corresponding with spacing preiection, and when push rod was pulled back, limited step was limited after falling in the annular groove.
Yet, since between push rod and the syringe only the coupling by limited step and annular groove realize spacing, do not reach disposable self-destructing, be push rod behind the syringe of packing into if not by instrument or destructive operation, just can't extract again, so just can stop reusable possibility, but because it is identical to form the both sides spacing preiection height of annular groove on the syringe inwall, applying the power that equates when inserting, just can pull out push rod, provide chance for reusing, therefore, have influence on the safety in utilization of syringe, can not guarantee that " disposable " uses fully.
Summary of the invention
This utility model purpose provides a kind of syringe cylinder structure of disposable syringe, by the improvement of structure, improves the safety that syringe uses, and stops cross infection.
For achieving the above object, the technical solution adopted in the utility model is: a kind of syringe cylinder structure of disposable syringe, comprise a hollow cylinder, this hollow cylinder caudal part inwall is provided with the annular groove that cooperates with push rod upper limit step, described annular groove constitutes cell wall by forward and backward bulge loop, and wherein back bulge loop height is greater than preceding bulge loop 0.25 ㎜～0.35 ㎜.
In the technique scheme, the width of described back bulge loop is at least 2 times of described lordosis ring width.
In the technique scheme, the nearly described hollow cylinder inlet side of described back bulge loop is provided with barrel dliameter guiding slope decrescence.
Further technical scheme is, described guiding slope extends to described hollow cylinder import department, is connected with this hollow cylinder import chamfering.
In the technique scheme, back bulge loop height is greater than preceding bulge loop 0.25 ㎜～0.35 ㎜, formation difference in height between the two, namely the barrel dliameter at bulge loop place, back is less than the barrel dliameter at preceding bulge loop place, when push rod is assembled, push rod is by the guiding slope, under axial force, limited step on the push rod struts the hollow body wall gradually along the guiding slope, when push rod inserted fast, before the hollow body wall that struts did not bounce back, limited step was by annular groove and preceding bulge loop, enter in the hollow cylinder, finish assembling.When the user uses, behind to be injected the finishing, if want to pull out push rod, the limited step on the push rod through preceding bulge loop, struts the hollow body wall earlier, yet, because the height of back bulge loop is greater than preceding bulge loop, thereby the barrel dliameter that strutted of hollow cylinder can't satisfy limited step by the needed barrel dliameter of back bulge loop, and limited step just falls in the annular groove, can not continue to pull back, push rod is locked spacing.Both be to strengthen pulling force, also can't have deviate from annular groove, realized real disposable operation use, improved safety in utilization.
Because technique scheme is used, the advantage that this utility model compared with prior art has is:
1, annular groove constitutes cell wall by forward and backward bulge loop in this utility model, wherein back bulge loop height is greater than preceding bulge loop 0.25 ㎜～0.35 ㎜, compare with structure in the past, push rod limited step when retracting will fall in the annular groove, can't be drawn out, stop the possibility that reuses, guarantee the use of syringe " disposable ", improve the safety that syringe uses, effectively avoided cross infection;
2, because the bulge loop nearly described hollow cylinder inlet side of back described in this utility model is provided with barrel dliameter guiding slope decrescence, increased a guiding mechanism, made push rod when assembling, be easier to by, the thrust of use is littler.
Description of drawings
Fig. 1 is the structural representation of this utility model embodiment one;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the user mode sketch map of this utility model embodiment one;
Fig. 4 is the structural representation of this utility model embodiment two.
Wherein: 1, hollow cylinder; 2, push rod; 3, limited step; 4, annular groove; 5, preceding bulge loop; 6, back bulge loop; 7, guiding slope; 8, import chamfering.
The specific embodiment
Below in conjunction with drawings and Examples this utility model is further described:
Embodiment one: shown in Fig. 1～4, a kind of syringe cylinder structure of disposable syringe, comprise a hollow cylinder 1, this hollow cylinder 1 caudal part inwall is provided with the annular groove 4 that cooperates with push rod 2 upper limit steps 3, described annular groove 4 constitutes cell wall by preceding bulge loop 5, back bulge loop 6, wherein bulge loop 6 height in back are greater than preceding bulge loop 0.3 ㎜, and the width of described back bulge loop 6 is 2 times of described preceding bulge loop 5 width, and described back bulge loop 6 nearly described hollow cylinder 1 inlet sides are provided with barrel dliameter guiding slope 7 decrescence.
When assembling, push rod 2 is exerted oneself by guiding slope 7 and is pushed to syringe inside fast, under the effect of acceleration of gravity, hollow cylinder 1 tail end inwall place is subjected to push rod 2 the crowded of limited step 3 and pushes away, strutted, before not resetting, limited step 3 is fast by annular groove 4 and preceding bulge loop 5, enter in the hollow cylinder 1, finish assembling.And in use, push rod 2 is when pulling back, and on the one hand pull-back forces is less than push-on force, pulls the push speed of moving speed when assembling less than machine, thereby the acceleration of gravity when pulling back is when pushing; On the other hand, also be most importantly, the height of preceding bulge loop 5 is less than back bulge loop 6, limited step 3 outwards squeezes by preceding bulge loop 5 time and pushes away hollow cylinder 1, outwards strut, pass through the spacing of back bulge loop 6 but the width that struts is not enough to satisfy limited step 3, thereby limited step 3 falls in the annular groove 4, and can't continue again to spur backward, if when promoting forward, bulge loop 5 is spacing before being subjected to, and increases thrust, then can cause fractureing of push rod 2, really realize disposable use.
Embodiment two: referring to shown in Figure 4, a kind of syringe cylinder structure of disposable syringe, in the present embodiment, its structure is similar substantially to embodiment one, difference is: described back bulge loop 6 nearly described hollow cylinder 1 inlet sides are provided with barrel dliameter guiding slope 7 decrescence, this guiding slope 7 extends to described hollow cylinder 1 import department, is connected with this hollow cylinder 1 import chamfering 8, thereby is easy to pushing of push rod.
Claims (4)
1. the syringe cylinder structure of a disposable syringe, comprise a hollow cylinder, this hollow cylinder caudal part inwall is provided with the annular groove that cooperates with push rod upper limit step, it is characterized in that: described annular groove constitutes cell wall by forward and backward bulge loop, and wherein back bulge loop height is greater than preceding bulge loop 0.25 ㎜～0.35 ㎜.
2. the syringe cylinder structure of disposable syringe according to claim 1 is characterized in that: the width of described back bulge loop is at least 2 times of described lordosis ring width.
3. the syringe cylinder structure of disposable syringe according to claim 1 is characterized in that: the nearly described hollow cylinder inlet side of described back bulge loop is provided with barrel dliameter guiding slope decrescence.
4. the syringe cylinder structure of disposable syringe according to claim 3 is characterized in that: described guiding slope extends to described hollow cylinder import department, is connected with this hollow cylinder import chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220626985 CN203043175U (en) | 2012-11-25 | 2012-11-25 | Needle cylinder structure of disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220626985 CN203043175U (en) | 2012-11-25 | 2012-11-25 | Needle cylinder structure of disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203043175U true CN203043175U (en) | 2013-07-10 |
Family
ID=48726181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220626985 Expired - Fee Related CN203043175U (en) | 2012-11-25 | 2012-11-25 | Needle cylinder structure of disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203043175U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108338852A (en) * | 2018-03-16 | 2018-07-31 | 鲁恩赐 | Disposable syringe for veterinary use |
-
2012
- 2012-11-25 CN CN 201220626985 patent/CN203043175U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108338852A (en) * | 2018-03-16 | 2018-07-31 | 鲁恩赐 | Disposable syringe for veterinary use |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131125 |