CN103751885A - Disposable syringe - Google Patents
Disposable syringe Download PDFInfo
- Publication number
- CN103751885A CN103751885A CN201410016288.1A CN201410016288A CN103751885A CN 103751885 A CN103751885 A CN 103751885A CN 201410016288 A CN201410016288 A CN 201410016288A CN 103751885 A CN103751885 A CN 103751885A
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- CN
- China
- Prior art keywords
- syringe
- push rod
- convex rib
- rubber plug
- elastic free
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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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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A disposable syringe comprises a syringe and a push rod which is arranged in the syringe. A rubber plug is sleeved on the front portion of the push rod; an inner ring bridge valve is fixedly disposed in the syringe and close to tail end of the syringe; the part of the syringe, which is at the front position of the inner ring bridge valve, inwardly forms a circle of a projecting part so as to constitute a limit convex rib; the inner ring bridge valve is composed of a fixing ring of a ring cross section and an elastic free arm fixed on the fixing ring; the elastic free arm extends from the fixing ring to the front end of the limit convex rib. When the sealing rubber plug moves toward the front end of the syringe, the elastic free arm of the inner ring bridge valve plays the role of a bridge, and when the sealing rubber plug moves toward the tail end of the syringe, the elastic free arm has the functions of blocking and limit.
Description
Technical field
The present invention relates to a kind of disposable syringe, belong 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 has accounted for a very large part in medical apparatus and instruments, there is cross infection when avoiding to the input of the mankind or animal or taking out medium, disposable syringe is widely used in modern medicine industry as conventional medical apparatus and instruments, after using, as hospital refuse, processes.
The syringe needle that syringe is conventionally arranged on push rod in hollow barrel, is fitted in the seal rubber plug in syringe and is positioned at push rod front end by a hollow barrel, forms, and syringe inwall and seal rubber plug interference fit, form enclosed space, liquid sucked or released syringe.In prior art, while pulling back for anti-throw-out lever, extract seal rubber plug out syringe, 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, push rod front end is provided with the limited step corresponding with spacing preiection, and when push rod is pulled back, limited step is limited after falling in annular groove.
Although it is limited that limited step falls into after annular groove, under larger pulling force, can be drawn out, therefore can not realize disposable use completely.Publication No. is CN102989061A, the Chinese invention patent that name is called < < 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 the front cell wall 0.1mm～0.35mm of 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 described die-cut limit to the distance of 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 stopping of the die-cut limit sealed muscle on seal rubber plug, seal rubber plug is difficult for reaching through limited impression the front portion of syringe.
Summary of the invention
The object of the invention is to provide a kind of disposable syringe.
For achieving the above object, the technical solution used in the present invention 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; The retainer ring that described internal ring bridge valve is annulus by cross section and the elastic free arm being fixed on described retainer ring form, and this elastic free arm is extended and extends to described retaining convex rib place to the direction of described retaining convex rib by described retainer ring.
Preferred technical scheme is: 0.005～0.2 millimeter of the external diameter of the locating snap ring of the large described push rod of internal diameter of described retaining convex rib.
Preferred technical scheme is: 0.2～0.4 millimeter of the internal diameter of the large described retaining convex rib of external diameter on the die-cut limit of described seal rubber plug.
Preferred technical scheme is: 0.2～0.4 millimeter of the internal diameter 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, the present invention compared with prior art has following advantages and effect:
1, the elastic free arm of internal ring bridge valve of the present invention plays bridge beam action when the front end of syringe moves at seal rubber plug, at described seal rubber plug, when the tail end of syringe moves, plays and stops position-limiting action.
2, a structure of the present invention parts that are fixedly installed of other increase are internal ring bridge valve, so Stability Analysis of Structures, are convenient to install.
Accompanying drawing explanation
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.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Notice, appended graphic the illustrated structure of this description, ratio, size etc., equal contents in order to coordinate description to disclose only, for person skilled in the art scholar, understand and read, not in order to limit the enforceable qualifications of the present invention, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, not affecting under the effect that the present invention can produce and the object that can reach, all should still drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, in this description, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under without essence change technology contents, when being also considered as the enforceable category of the present invention.
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 portions are 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 that syringe is away from the position of 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; The retainer ring 6 that described internal ring bridge valve 5 is annulus by cross section and the elastic free arm 7 being fixed on described retainer ring form, and in this specific embodiment, retainer ring 6 and elastic free arm 7 are one-body molded.Elastic free arm 7 is extended and extends to described retaining convex rib 8 places to the direction of described retaining convex rib 8 by described retainer ring 6, and the thickness of elastic free arm 7 is more than or equal to the height of retaining convex rib 8.0.005～0.1 millimeter of the external diameter of the locating snap ring 3 of the large described push rod 4 of internal diameter of described retaining convex rib 8.0.2～0.4 millimeter of the internal diameter 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 at the tail end of syringe 9, offer retainer ring 6 mounting grooves, then internal ring bridge valve 5 is fixed in syringe 9.Then the push rod assembling 4 is inserted in syringe 9, when on push rod 4, sheathed seal rubber plug passes through internal ring bridge valve 5, sealed muscle 2 and die-cut limit 1 on 7 pairs of seal rubber plugs of elastic free arm of internal ring bridge valve 5 are compressed gradually so that seal rubber plug moves forward under the promotion of push rod 4, and the front end to syringe 9 moves.Because elastic free arm 7 extends to retaining convex rib 8, therefore under the guiding and bridging action of elastic free arm 7, although 0.2～0.4 millimeter of the internal diameter of the large described retaining convex rib 8 of external diameter on the die-cut limit 1 of seal rubber plug, it also can pass through retaining convex rib 8 to the front end of syringe 9 smoothly.When assembling, the effect of internal ring bridge valve 5 is to build bridge and guide effect, so that seal rubber plug enters the front end of syringe 9 by retaining convex rib 8.
After disposable syringe use finishes, 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, make its tail end direction to syringe 9 crooked, dodging due to elastic free arm 7 now, 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 under the exerting pressure of locating snap ring 3 again and is out of shape.At this moment, the locating snap ring 3 of push rod 4 moves to the tail end of syringe 9 because of the stretchy push rod 4 not of stopping of the elastic free arm 7 of internal ring bridge valve 5, the elastic free arm 7 that on push rod 4, sheathed seal rubber plug plays bridging action when the assembling originally because of retaining convex rib 8(is now after locating snap ring 3) to stopping of sealed muscle 2, can not promote push rod 4 and move to the front end of syringe 9, 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, due to 0.2～0.4 millimeter of the internal diameter of the large described retaining convex rib 8 of external diameter on the die-cut limit 1 of described seal rubber plug.On push rod 4, sheathed seal rubber plug can not promote push rod 4 and moves to the front end of syringe 9 because of stopping of 8 pairs of sealed muscles 2 of retaining convex rib.Mainly that distortion due to die-cut limit 1 cannot be passed through push rod 4.
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
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; The retainer ring that described internal ring bridge valve is annulus by cross section and the elastic free arm being fixed on described retainer ring form, and this elastic free arm is extended and extends to described retaining convex rib place to the direction of described retaining convex rib by described retainer ring.
2. disposable syringe according to claim 1, is characterized in that: 0.005～0.2 millimeter of the external diameter 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: 0.2～0.4 millimeter of the internal diameter 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: 0.2～0.4 millimeter of the internal diameter 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 |
|---|---|---|---|
| CN201410016288.1A CN103751885A (en) | 2014-01-14 | 2014-01-14 | Disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410016288.1A CN103751885A (en) | 2014-01-14 | 2014-01-14 | Disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103751885A true CN103751885A (en) | 2014-04-30 |
Family
ID=50519301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410016288.1A Pending CN103751885A (en) | 2014-01-14 | 2014-01-14 | Disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103751885A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2533875Y (en) * | 2002-03-06 | 2003-02-05 | 骆辉 | Antipollution medical syringes |
| WO2006068650A1 (en) * | 2004-12-21 | 2006-06-29 | Becton, Dickinson And Company | Syringe assembly having disabling mechanism |
| CN200998483Y (en) * | 2007-01-24 | 2008-01-02 | 阎侗有 | Automatic unlocking conjoined tooth-like part for limiting for the self-breaking syringe |
| CN201079609Y (en) * | 2007-09-10 | 2008-07-02 | 林作钱 | Novel self-destructing syringe |
| CN101347648A (en) * | 2008-05-22 | 2009-01-21 | 林作钱 | Self-locking type self-breaking syringe |
| CN201987989U (en) * | 2010-12-13 | 2011-09-28 | 江苏亿乐医疗用品有限公司 | Mandrel locking structure |
| CN102989061A (en) * | 2012-12-04 | 2013-03-27 | 苏州市雅思精密模具有限公司 | Disposable syringe |
| CN203043163U (en) * | 2012-12-04 | 2013-07-10 | 苏州市雅思精密模具有限公司 | Disposable syringe |
| CN204106740U (en) * | 2014-01-14 | 2015-01-21 | 苏州市雅思精密模具有限公司 | A kind of disposable syringe |
-
2014
- 2014-01-14 CN CN201410016288.1A patent/CN103751885A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2533875Y (en) * | 2002-03-06 | 2003-02-05 | 骆辉 | Antipollution medical syringes |
| WO2006068650A1 (en) * | 2004-12-21 | 2006-06-29 | Becton, Dickinson And Company | Syringe assembly having disabling mechanism |
| CN200998483Y (en) * | 2007-01-24 | 2008-01-02 | 阎侗有 | Automatic unlocking conjoined tooth-like part for limiting for the self-breaking syringe |
| CN201079609Y (en) * | 2007-09-10 | 2008-07-02 | 林作钱 | Novel self-destructing syringe |
| CN101347648A (en) * | 2008-05-22 | 2009-01-21 | 林作钱 | Self-locking type self-breaking syringe |
| CN201987989U (en) * | 2010-12-13 | 2011-09-28 | 江苏亿乐医疗用品有限公司 | Mandrel locking structure |
| CN102989061A (en) * | 2012-12-04 | 2013-03-27 | 苏州市雅思精密模具有限公司 | Disposable syringe |
| CN203043163U (en) * | 2012-12-04 | 2013-07-10 | 苏州市雅思精密模具有限公司 | Disposable syringe |
| CN204106740U (en) * | 2014-01-14 | 2015-01-21 | 苏州市雅思精密模具有限公司 | A kind of disposable syringe |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20140430 |