CN204106740U - A kind of disposable syringe - Google Patents
A kind of disposable syringe Download PDFInfo
- Publication number
- CN204106740U CN204106740U CN201420021902.9U CN201420021902U CN204106740U CN 204106740 U CN204106740 U CN 204106740U CN 201420021902 U CN201420021902 U CN 201420021902U CN 204106740 U CN204106740 U CN 204106740U
- Authority
- CN
- China
- Prior art keywords
- syringe
- push rod
- convex rib
- retaining convex
- rubber plug
- 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 - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A kind of disposable syringe, comprise syringe, push rod, described push rod is arranged in described syringe, described push rod front portion is arranged with seal rubber plug, the inside of described syringe is installed with internal ring bridge valve near tail end, and the syringe at the front position place of this internal ring bridge valve inwardly forms a circle protuberance to form retaining convex rib; Described internal ring bridge valve is that the retainer ring of annulus forms with the elastic free arm be fixed on described retainer ring by cross section, and this elastic free arm is extended by the direction of described retainer ring to described retaining convex rib and extended to the front end of described retaining convex rib.The elastic free arm of internal ring bridge valve of the present utility model plays bridge beam action when seal rubber plug moves to the front end of syringe, plays stop position-limiting action when described seal rubber plug moves to the tail end of syringe.
Description
Technical field
This utility model relates to a kind of disposable syringe, belongs to technical field of medical instruments.
Background technology
Growing along with medical industry, also more and more higher to the hygienic requirements of medical apparatus and instruments.Syringe account for a very large part in medical apparatus and instruments, for there is cross infection when avoiding to the mankind or animal input or take out medium, disposable syringe widely uses in modern medicine industry as the medical apparatus and instruments of routine, namely as hospital refuse process after use.
The syringe needle that syringe is arranged on push rod in hollow barrel usually by a hollow barrel, be fitted in the seal rubber plug in syringe and be positioned at push rod front end forms, and syringe inwall and seal rubber plug interference fit, form enclosed space, sucked by liquid or release syringe.In prior art, in order to extract seal rubber plug out syringe when anti-throw-out lever is pulled back, back end of syringe (relative 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, push rod front end is provided with the limited step corresponding with spacing preiection, and when push rod is pulled back, limited step falls into after in annular groove limited.
Although limited step is limited after falling into annular groove, can be drawn out under larger pulling force, therefore can not realize single use completely.Publication No. is CN102989061A, name is called that the Chinese invention patent of " disposable syringe " discloses a kind of technical scheme: disposable syringe, comprise syringe, push rod and syringe needle, described push rod is arranged in syringe, push rod front end sleeve is provided with seal rubber plug, described syringe is provided with limited impression near tail end, and the rear cell wall of the corresponding nozzle side of this limited impression is higher than cell wall 0.1mm ~ 0.35mm before opposite side; Described seal rubber plug outer edge surface is provided with the die-cut limit of at least one sealed muscle and bottom, described die-cut limit and described rear cell wall are interference fit, the magnitude of interference is 0.1mm ~ 0.3mm, the width of described limited impression is more than or equal to the distance of described die-cut limit to described sealed muscle, and the shore hardness of described seal rubber plug is between 40 degree ~ 100 degree.The shortcoming of this technical scheme is: when assembling, due to the stop of the die-cut limit sealed muscle on seal rubber plug, and seal rubber plug not easily reaches the front portion of syringe through limited impression.
Summary of the invention
This utility model object is to provide a kind of disposable syringe.
For achieving the above object, the technical solution adopted in the utility model is: a kind of disposable syringe, comprise syringe, push rod, described push rod is arranged in described syringe, described push rod front portion is arranged with seal rubber plug, the inside of described syringe is installed with internal ring bridge valve near tail end, and the syringe at the front position place of this internal ring bridge valve inwardly forms a circle protuberance to form retaining convex rib; Described internal ring bridge valve is that the retainer ring of annulus forms with the elastic free arm be fixed on described retainer ring by cross section, and this elastic free arm is extended by the direction of described retainer ring to described retaining convex rib and extended to described retaining convex rib.
Preferred technical scheme is: the external diameter 0.005 ~ 0.2 millimeter of the locating snap ring of the large described push rod of internal diameter of described retaining convex rib.
Preferred technical scheme is: the internal diameter 0.2 ~ 0.4 millimeter of the large described retaining convex rib of external diameter on the die-cut limit of described seal rubber plug.
Preferred technical scheme is: the internal diameter 0.2 ~ 0.4 millimeter of the large described retaining convex rib of external diameter of the second sealing ring of described seal rubber plug.
Preferred technical scheme is: the quantity of described elastic free arm is four, and four elastic free arms are symmetricly set on described retainer ring.
Because technique scheme is used, this utility model compared with prior art has following advantages and effect:
1, the elastic free arm of internal ring bridge valve of the present utility model plays bridge beam action when seal rubber plug moves to the front end of syringe, plays stop position-limiting action when described seal rubber plug moves to the tail end of syringe.
2, structure of the present utility model only increases the parts be fixedly installed and internal ring bridge valve in addition, therefore Stability Analysis of Structures, is convenient to install.
Accompanying drawing explanation
Accompanying drawing 1 is seal rubber plug schematic diagram.
Accompanying drawing 2 is internal ring bridge valve arrangement schematic diagram.
Accompanying drawing 3 is pusher structure schematic diagram.
Accompanying drawing 4 is for being provided with the syringe cylinder structure schematic diagram of internal ring bridge valve.
In above accompanying drawing, 1, die-cut limit; 2, sealed muscle; 3, locating snap ring; 4, push rod; 5, internal ring bridge valve; 6, retainer ring; 7, elastic free arm; 8, retaining convex rib; 9, syringe.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is further described:
Notice, structure, ratio, size etc. that this description institute accompanying drawings illustrates, content all only in order to coordinate description to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of this utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that this utility model can produce and the object that can reach, still all should drop on technology contents that this utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this description as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of this utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of this utility model.
Embodiment: a kind of disposable syringe
Shown in accompanying drawing 1 ~ accompanying drawing 4, a kind of disposable syringe, comprises syringe 9, push rod 4, and described push rod 4 is arranged in described syringe 9, and described push rod 4 front portion is arranged with seal rubber plug, and sealing plug comprises die-cut limit 1 and two seals muscle 2 together; The quantity of sealed muscle 2 can be one.The inside of described syringe 9 is installed with internal ring bridge valve 5 near tail end (tail end of syringe refers to the position of syringe away from injection needle), and the syringe 9 at the front position place of this internal ring bridge valve 5 inwardly forms a circle protuberance to form retaining convex rib 8; Described internal ring bridge valve 5 is that the retainer ring 6 of annulus and the elastic free arm 7 be fixed on described retainer ring form by cross section, in this embodiment, retainer ring 6 and elastic free arm 7 one-body molded.Elastic free arm 7 is extended by the direction of described retainer ring 6 to described retaining convex rib 8 and is extended to described retaining convex rib 8, and the thickness of elastic free arm 7 is more than or equal to the height of retaining convex rib 8.The external diameter 0.005 ~ 0.1 millimeter of the locating snap ring 3 of the large described push rod 4 of internal diameter of described retaining convex rib 8.The internal diameter 0.2 ~ 0.4 millimeter of the large described retaining convex rib 8 of external diameter on the die-cut limit 1 of described seal rubber plug.The quantity of described elastic free arm 7 is four, and four elastic free arms 7 are symmetricly set on described retainer ring 6.
When assembling, first offering retainer ring 6 mounting groove at the tail end of syringe 9, then internal ring bridge valve 5 being fixed in syringe 9.Then the push rod 4 assembled is inserted in syringe 9, when seal rubber plug sheathed on push rod 4 is through internal ring bridge valve 5, sealed muscle 2 on elastic free arm 7 pairs of seal rubber plugs of internal ring bridge valve 5 and die-cut limit 1 compresses gradually so that seal rubber plug moves forward under the promotion of push rod 4, the front end namely to syringe 9 is moved.Because elastic free arm 7 extends to retaining convex rib 8, therefore under the guiding and bridging action of elastic free arm 7, although the internal diameter 0.2 ~ 0.4 millimeter of the large described retaining convex rib 8 of the external diameter on the die-cut limit 1 of seal rubber plug, it also can smoothly by the front end of retaining convex rib 8 to syringe 9.When assembling, the effect of internal ring bridge valve 5 is built bridge and guide effect, enters the front end of syringe 9 to make seal rubber plug by retaining convex rib 8.
After disposable syringe use terminates, toward pumpback push rod 4, when the locating snap ring 3 of push rod 4 touches elastic free arm 7, locating snap ring 3 can be exerted pressure to elastic free arm 7, its tail end direction to syringe 9 is bent, dodging now due to elastic free arm 7, push rod 4 can continue to move to the tail end direction of syringe 9, when push rod 4 continues to move a certain distance, the sealed muscle 2 of seal rubber plug or die-cut limit arrive the rear end of retaining convex rib 8, and elastic free arm 7 at this moment is also bent to a certain degree and is difficult to be out of shape under the exerting pressure of locating snap ring 3 again.At this moment, the locating snap ring 3 of push rod 4 because of the stop of the elastic free arm 7 of internal ring bridge valve 5 not stretchy push rod 4 move to the tail end of syringe 9, seal rubber plug sheathed on push rod 4 originally plays the elastic free arm 7 of bridging action now after locating snap ring 3 because of retaining convex rib 8(when assembling) push rod 4 can not be promoted to the stop of sealed muscle 2 to the front end of syringe 9 and move, namely seal rubber plug is stuck between elastic free arm 7 and retaining convex rib 8.The sealed muscle 2 of seal rubber plug or die-cut limit arrive the rear end of retaining convex rib 8, the internal diameter 0.2 ~ 0.4 millimeter of the large described retaining convex rib 8 of the external diameter due to the die-cut limit 1 of described seal rubber plug.Seal rubber plug sheathed on push rod 4 can not promote push rod 4 because of the stop of retaining convex rib 8 pairs of sealed muscles 2 and move to the front end of syringe 9.Mainly due to the distortion on die-cut limit 1, push rod 4 cannot be passed through.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to this utility model spirit change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (5)
1. a disposable syringe, comprise syringe, push rod, described push rod is arranged in described syringe, described push rod front portion is arranged with seal rubber plug, it is characterized in that: the inside of described syringe is installed with internal ring bridge valve near tail end, the syringe at the front position place of this internal ring bridge valve inwardly forms a circle protuberance to form retaining convex rib; Described internal ring bridge valve is that the retainer ring of annulus forms with the elastic free arm be fixed on described retainer ring by cross section, and this elastic free arm is extended by the direction of described retainer ring to described retaining convex rib and extended to described retaining convex rib.
2. disposable syringe according to claim 1, is characterized in that: the external diameter 0.005 ~ 0.2 millimeter of the locating snap ring of the large described push rod of internal diameter of described retaining convex rib.
3. disposable syringe according to claim 1, is characterized in that: the internal diameter 0.2 ~ 0.4 millimeter of the large described retaining convex rib of external diameter on the die-cut limit of described seal rubber plug.
4. disposable syringe according to claim 1, is characterized in that: the quantity of described elastic free arm is four, and four elastic free arms are symmetricly set on described retainer ring.
5. disposable syringe according to claim 1, is characterized in that: the internal diameter 0.2 ~ 0.4 millimeter of the large described retaining convex rib of external diameter of the sealed muscle of described seal rubber plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420021902.9U CN204106740U (en) | 2014-01-14 | 2014-01-14 | A kind of disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420021902.9U CN204106740U (en) | 2014-01-14 | 2014-01-14 | A kind of disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204106740U true CN204106740U (en) | 2015-01-21 |
Family
ID=52324105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420021902.9U Expired - Fee Related CN204106740U (en) | 2014-01-14 | 2014-01-14 | A kind of disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204106740U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103751885A (en) * | 2014-01-14 | 2014-04-30 | 苏州市雅思精密模具有限公司 | Disposable syringe |
| CN110621368A (en) * | 2017-05-04 | 2019-12-27 | 奥布里斯特封闭瑞士有限公司 | Feeding injector |
-
2014
- 2014-01-14 CN CN201420021902.9U patent/CN204106740U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103751885A (en) * | 2014-01-14 | 2014-04-30 | 苏州市雅思精密模具有限公司 | Disposable syringe |
| CN110621368A (en) * | 2017-05-04 | 2019-12-27 | 奥布里斯特封闭瑞士有限公司 | Feeding injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20160114 |