CN106310462A - Syringe solution pushing plunger - Google Patents
Syringe solution pushing plunger Download PDFInfo
- Publication number
- CN106310462A CN106310462A CN201610179392.1A CN201610179392A CN106310462A CN 106310462 A CN106310462 A CN 106310462A CN 201610179392 A CN201610179392 A CN 201610179392A CN 106310462 A CN106310462 A CN 106310462A
- Authority
- CN
- China
- Prior art keywords
- piston
- acting surface
- installation portion
- syringe
- contact site
- 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.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31513—Piston constructions to improve sealing or sliding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31515—Connection of piston with piston rod
Abstract
The invention discloses a syringe solution pushing plunger, comprising a mounting part and a piston, wherein the piston sleeves the mounting part, the side wall of the mounting part is provided with a first action surface and a second action surface, both of which are circumferentially arranged around the mounting part; the first action surface and the second action surface are sequentially distributed in an axial direction of the mounting part from top to bottom; from top to bottom, the distance from the first action surface to the center line of the mounting part is gradually increased, and the distance from the second action surface to the center line of the mounting part is gradually reduced; a first contact part is arranged at a part, corresponding to the first action surface, of the inner wall of the piston and is in contact match with the first action surface, and a second contact part is arranged at a part, corresponding to the second action surface, of the inner wall of the piston and is in contact match with the second action surface. According to the syringe solution pushing plunger provided by the invention, in a solution pushing and drawing process of the solution pushing plunger, the piston and the inner wall of the syringe column can always keep an excellent contact state, thereby ensuring that the syringe can smoothly push and draw back the solution and the syringe still can be used after the piston is aged.
Description
Technical field
The present invention relates to syringe art, be specifically related to a kind of syringe pushes away fluid column plug.
Background technology
The piston pushing away liquid plunger end of syringe is typically made up of rubber, by close between rubber and injection tube
Envelope coordinates, then pushes away the fluid push rod of fluid column plug by push-and-pull and drive piston mobile realization in injection tube push away liquid and take out
Liquid.And in use, such as during drawing liquid, due to suction function, piston there will be certain journey
The contraction distortion of degree, in this case, if what piston size during fabrication did is not very accurate, the most very may be used
Syringe inwall can be departed from, and then drawing liquid cannot be realized.And rubber uses or after long-time storage for a long time,
Can be age contraction, it may appear that do not contact between piston with injection tube and then cause packing less situation.
Summary of the invention
The technical problem to be solved is to provide a kind of syringe to push away fluid column plug, pushes away pushing away fluid column plug
During drawing liquid, piston and injection tube inwall can be made to remain good contact condition, it is ensured that injection
Device pushes away drawing liquid smoothly, and after piston is aging, still can use.
For solving above-mentioned existing technical problem, the present invention uses following scheme: syringe pushes away fluid column plug, bag
Including installation portion and piston, described piston bush is contained on installation portion, and described installation portion sidewall has the portion of being fitted around
The first circumferentially disposed acting surface and the second acting surface；Described first acting surface and the second acting surface are at installation portion
Axial direction on be sequentially distributed from top to bottom, and, from top to bottom, the first acting surface is to installation portion center
The distance of line is gradually increased, and the second acting surface is gradually reduced to the distance of installation portion centrage；On piston inner wall
It is positioned at the position corresponding with the first acting surface to be provided with the first contact site, the first contact site and the first acting surface and connect
Touching and coordinate, piston inner wall is positioned at the position corresponding with the second acting surface and is provided with the second contact site, second connects
Contact portion contacts cooperation with the second acting surface.
In the present invention, relate to upper and lower that wait the noun of locality, all with syringe under vertical laying state, syringe needle
Upward for reference.
In the present invention, by arranging the first acting surface and the second acting surface at the sidewall of installation portion, and by two
Person is arranged to following structure: from top to bottom, and the first acting surface is gradually increased to the distance of installation portion centrage,
Second acting surface is gradually reduced to the distance of installation portion centrage, and in use, syringe is in drawing liquid mistake
Cheng Zhong, the piston portion of being mounted opposite moves up, and now, the second contact site prolongs the second acting surface and moves up,
Due to the effect of the second acting surface, the second contact site by the second acting surface outwardly against so that make piston outer wall face
It is pushed outwardly, makes the piston outside wall surface at this position keep and syringe contact internal walls, thus ensure and note
Penetrate and seal between pipe；Syringe is during pushing away liquid, and the piston portion of being mounted opposite moves down, now, and first
Contact site prolongs the first acting surface and moves down, and due to the effect of the first acting surface, the first contact site is made by first
With facing out extruding, make the piston outside wall surface at this position keep and syringe contact internal walls, thus ensure with
Seal between syringe.
As preferably, described first contact site is protruding the first internal projection at piston inner wall, and described second connects
Contact portion is protruding the second internal projection at piston inner wall, described piston the first internal projection and the second lobe it
Between part and installation portion between there is gap.By the first contact site and the second contact site are arranged to projection
Structure, makes piston part between the first internal projection and the second lobe and forms gap between installation portion,
During pushing away liquid and drawing liquid, when piston moves relative to the first acting surface and the second acting surface, frictional force is little,
Using effect is good.
As preferably, described piston outer wall is provided around in the position corresponding with the first contact site piston circumference
The first flange arranged, described piston outer wall is provided around piston week in the position corresponding with the second contact site
To the second flange arranged.By position corresponding with the first contact site and the second contact site on piston outer wall
First flange and the second flange are set, are sealed with syringe contact internal walls by the first flange and the second flange,
Syringe resistance during pushing away drawing liquid can be reduced.
As preferably, what described installation portion sidewall was positioned at the first acting surface is arranged over screens flange, described peace
Dress portion forms groove between the first acting surface and screens flange, in the portion of respective slot on described piston inner wall
Position is provided with to stretch into stretches into portion in groove.Stretch into portion by arranging to stretch on piston inner wall in groove, taking out
During liquid, groove has position-limiting action to piston, is possible to prevent piston to depart from from installation portion.
As preferably, described piston inner wall is provided with the first internal face and the second wall, the position of the first internal face
Corresponding with the first acting surface and shape is relative with the first acting surface, the first internal face and the first acting surface connect
Touching, the second internal face position is corresponding with the second acting surface and shape is relative with the second acting surface, in second
Wall and the contact of the second acting surface, described in state the first contact site be the first internal face, described second contact site is
Second wall.By piston inner wall being arranged to the structure the most corresponding with installation portion outer wall shape, in first
Wall directly contacts with the first acting surface, and the second internal face directly contacts with the second acting surface, it is also possible to reach
Same effect.
As preferably, described piston is provided around piston in the position corresponding with the first contact site circumferentially disposed
The first flange, described piston is provided around piston in the position corresponding with the second contact site circumferentially disposed
Second flange.
As preferably, described piston is circulus, and the upper end of installation portion is exposed at piston exterior.This knot
Under structure, piston is easy to manufacture, easy installation and removal.
As preferably, described first acting surface and the second effect are symmetrical, and described piston is about the first effect
The plane of symmetry of face and the second acting surface is symmetrical.Owing to the first acting surface and the second effect are symmetrical, and live
Plug is also symmetrical structure, and such piston is forward and reverse all can be installed.
Beneficial effect:
After the present invention uses technique scheme, by arranging the first acting surface and at the sidewall of installation portion
Two acting surfaces, and the two is arranged to following structure: from top to bottom, the first acting surface is to installation portion center
The distance of line is gradually increased, and the second acting surface is gradually reduced to the distance of installation portion centrage, in the process of use
In, syringe is during taking out and pushing away liquid, and living can ensure that and seal between syringe.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional view of piston in the embodiment of the present invention one；
Fig. 2 is the longitudinal sectional view of installation portion in the embodiment of the present invention one；
Fig. 3 is the sectional view of the fit structure of piston and installation portion in the embodiment of the present invention one；
Fig. 4 is the top view of the fit structure of piston and installation portion in the embodiment of the present invention one；
Fig. 5 is the sectional view of the fit structure of piston and installation portion in the embodiment of the present invention two；
Fig. 6 is the sectional view of the fit structure of piston and installation portion in the embodiment of the present invention three；
Fig. 7 is the sectional view of the fit structure of piston and installation portion in the embodiment of the present invention four；
Fig. 8 is the sectional view of the fit structure of piston and installation portion in the embodiment of the present invention five；
Fig. 9 is the sectional view of the fit structure of piston and installation portion in the embodiment of the present invention six；
Figure 10 is the sectional view of the fit structure of piston and installation portion in the embodiment of the present invention seven.
Detailed description of the invention
Embodiment one:
As shown in Figures 1 to 4, syringe of the present invention pushes away fluid column plug mainly by fluid push rod (not shown), peace
Dress portion 1 and piston 2 form, and installation portion is detachably arranged in the end of fluid push rod, concrete, installation portion
Inside has installation cavity 14, and the bottom end opening of installation cavity 14 forms a reducing, and fluid push rod end is provided with dop,
Fluid push rod dop makes installation portion be arranged on fluid push rod in snapping in installation cavity 14 by reducing, installation portion transversal
Face outline for circle, piston is circular ring, piston 2 integral assembling on installation portion 1, installation portion 1
Upper end expose outside piston 2, in the schematic diagram of Fig. 1 to Fig. 3, piston, installation portion and the two
The section of the longitudinal sectional view coordinated is all through piston, the centrage of installation portion.
There is the first acting surface 3 and the second effect that the portion of being fitted around is circumferentially disposed in the lateral wall of installation portion 1
Face 4；First acting surface 3 and the second acting surface 4 are sequentially distributed on the axial direction of installation portion 1 from top to bottom,
Further, from top to bottom, the first acting surface 3 is gradually increased to the distance of installation portion 1 centrage, the second effect
Face 4 is gradually reduced to the distance of installation portion 1 centrage, and the first acting surface 3 and the second acting surface 4 shape are equal
Being similar to the side of circular cone structure, the two is face symmetrical structure, and the first acting surface 3 is made towards second
It is joined directly together towards one end of the first acting surface 3 with the second acting surface 4 with the one end in face 4, under this structure,
In the longitudinal sectional view of installation portion 1, installation portion 1 is between the first acting surface 3 and the second acting surface 4
Part formed triangular shape structure.
The structure of piston 2 is the symmetrical junction that the plane of symmetry about the first acting surface 3 and the second acting surface 4 is symmetrical
Structure, piston 2 inwall is positioned at the position corresponding with the first acting surface 3 and is provided with protruding at the of piston inner wall
One internal projection 5, this first internal projection 5 constitutes the first contact site contacting cooperation with the first acting surface 3；Piston
It is positioned at the position corresponding with the second acting surface 4 on 2 inwalls and is provided with protruding the second internal projection at piston inner wall
6, this second internal projection 6 constitutes the second contact site contacting cooperation with the second acting surface 4, under this structure,
Gap 7 is formed between the piston 2 part and installation portion 1 between the first internal projection 5 and the second lobe 6.
Be provided around in the position corresponding with the first contact site on piston 2 outer wall that piston 2 is circumferentially disposed first
Flange 9, piston 2 outer wall is provided around in the position corresponding with the second contact site piston 2 is circumferentially disposed
Two flanges 10.
What installation portion 1 sidewall was positioned at the first acting surface 3 is arranged over slightly convex screens flange 8, and screens is convex
Edge 8 is towards the formation inclined-plane, side 81 of the first acting surface 3, and on the axial direction of installation portion, from upper
Under and, this inclined-plane 81 is gradually reduced to the distance of installation portion 1 centrage, and installation portion 1 is at the first acting surface 3
And between the inclined-plane 81 of screens flange 8 formed groove 11, the first internal projection 5 position is set just at groove
In 11, this first internal projection 5 constitutes to stretch into and stretches into portion in groove 11.
Embodiment two:
As it is shown in figure 5, the difference of this embodiment and embodiment one is: the side wall surface of installation portion only by
First acting surface 3 and the second acting surface 4 form.
Embodiment three:
As shown in Figure 6, this embodiment is with the difference of embodiment one: the longitudinal cross-section of installation portion 1
In view, the installation portion 1 part between the first acting surface 3 and the second acting surface 4 forms semicircle shape knot
Structure.
Embodiment four:
As it is shown in fig. 7, the difference of this embodiment and embodiment one is: the longitudinal cross-section of installation portion 1
In view, the installation portion 1 part between the first acting surface 3 and the second acting surface 4 forms herringbone knot
Structure.
Embodiment five:
As shown in Figure 8, this embodiment is with the difference of embodiment one: the longitudinal cross-section of installation portion 1
In view, installation portion 1 is connected by transition face 15 between the first acting surface 3 and the second acting surface 4,
Trapezium structure is formed between three.
Embodiment six:
As it is shown in figure 9, the difference of this embodiment and embodiment one is: in piston inner wall is provided with first
Wall 12 and the second wall 13, the position of the first internal face 12 is corresponding with the first acting surface 3 and shape
Relative with the first acting surface 3, the first internal face 12 contacts with the first acting surface 3, now the first internal face 12
Constituting the first contact site, the second internal face 13 position is corresponding with the second acting surface 4 and shape is made with second
With face 4 relatively, the second internal face 13 contacts with the second acting surface 4, and now the second wall 13 constitutes second
Contact site.In the scope corresponding to the position corresponding with the first contact site namely the first internal face 12 on piston 2
Inside it is provided around the first flange 9 that piston 2 is circumferentially disposed, in the position corresponding with the second contact site on piston 2
Namely it is provided around, in the scope that second corresponding to internal face 13, the second flange 10 that piston 2 is circumferentially disposed.
Embodiment seven:
As shown in Figure 10, this embodiment is with the difference of embodiment six: installation portion 1 is positioned at the first work
Being connected by transition face 15 with between face 3 and the second acting surface 4, wherein transition face 15 is inner concave.
Claims (8)
1. syringe pushes away fluid column plug, and including installation portion (1) and piston (2), described piston (2) is sleeved on installation
In portion (1), it is characterised in that: it is circumferentially disposed that described installation portion (1) sidewall has the portion of being fitted around
First acting surface (3) and the second acting surface (4)；Described first acting surface (3) and the second acting surface (4)
The axial direction of installation portion (1) is sequentially distributed from top to bottom, and, from top to bottom, the first effect
Face (3) is gradually increased to the distance of installation portion (1) centrage, and the second acting surface (4) arrives installation portion (1)
The distance of centrage is gradually reduced；It is positioned at corresponding with the first acting surface (3) on piston (2) inwall
Position is provided with the first contact site, the first contact site and the first acting surface (3) contact and coordinates, piston (2)
Be positioned at the position corresponding with the second acting surface (4) on inwall and be provided with the second contact site, the second contact site with
Second acting surface (4) contact coordinates.
Syringe the most according to claim 1 pushes away fluid column plug, it is characterised in that: described first contact site is convex
Playing the first internal projection (5) at piston inner wall, described second contact site is protruding at the second of piston inner wall
Internal projection (6), the described piston (2) portion between the first internal projection (5) and the second lobe (6)
Divide, between installation portion (1), there is gap (7).
Syringe the most according to claim 2 pushes away fluid column plug, it is characterised in that: on described piston (2) outer wall
The first flange (9) that piston (2) is circumferentially disposed, institute it is provided around in the position corresponding with the first contact site
State that be provided around piston (2) on piston (2) outer wall in the position corresponding with the second contact site circumferentially disposed
The second flange (10).
Syringe the most according to claim 1 pushes away fluid column plug, it is characterised in that: described installation portion (1) sidewall
Be positioned at the first acting surface (3) is arranged over screens flange (8), and described installation portion (1) is made first
With forming groove (11) between face (3) and screens flange (8), right on described piston (2) inwall
The position answering groove (11) is provided with to stretch into stretches into portion in groove (11).
Syringe the most according to claim 1 pushes away fluid column plug, it is characterised in that: described piston inner wall is provided with
One internal face (12) and the second wall (13), the position of the first internal face (12) and the first acting surface (3)
Corresponding and shape is relative with the first acting surface (3), the first internal face (12) and the first acting surface (3)
Contact, the second internal face (13) position is corresponding with the second acting surface (4) and shape acts on second
Face (4) is relative, and the second internal face (13) contacts with the second acting surface (4), described first contact site
Being the first internal face (12), described second contact site is the second wall (13).
Syringe the most according to claim 5 pushes away fluid column plug, it is characterised in that: on described piston (2) with
The position that first contact site is corresponding is provided around the first flange (9) that piston (2) is circumferentially disposed, described work
It is provided around circumferentially disposed second convex of piston (2) in the position corresponding with the second contact site on plug (2)
Edge (10).
Syringe the most according to claim 1 pushes away fluid column plug, it is characterised in that: described piston (2) is ring-type
Structure, the upper end of installation portion (1) is exposed at piston (2) outward.
Syringe the most according to claim 1 pushes away fluid column plug, it is characterised in that: described first acting surface (3)
Symmetrical with the second acting surface (4) face, described piston (2) is about the first acting surface (3) and the second effect
The plane of symmetry in face (4) is symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610179392.1A CN106310462A (en) | 2016-03-28 | 2016-03-28 | Syringe solution pushing plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610179392.1A CN106310462A (en) | 2016-03-28 | 2016-03-28 | Syringe solution pushing plunger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106310462A true CN106310462A (en) | 2017-01-11 |
Family
ID=57726259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610179392.1A Pending CN106310462A (en) | 2016-03-28 | 2016-03-28 | Syringe solution pushing plunger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106310462A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001137338A (en) * | 1999-11-15 | 2001-05-22 | Kooki Engineering:Kk | Sliding member of syringe piston and its preparation process |
| CN2724733Y (en) * | 2004-09-15 | 2005-09-14 | 亨旺生化科技股份有限公司 | Back-drawing type safety syringe |
| CN102264414A (en) * | 2008-11-26 | 2011-11-30 | 阿西斯特医疗系统有限公司 | Apparatus and methods for fluid pressurizing units of injection systems |
| CN202198927U (en) * | 2011-07-15 | 2012-04-25 | 曾花 | Self-destroying type syringe |
| CN102526845A (en) * | 2010-12-13 | 2012-07-04 | 江苏亿乐医疗用品有限公司 | Safety self-destruction injector |
| CN202620377U (en) * | 2012-05-25 | 2012-12-26 | 山东新华安得医疗用品有限公司 | Low-resistance injector |
| CN204017037U (en) * | 2014-08-28 | 2014-12-17 | 江波 | The syringe core rod of lower resistance |
| WO2015150646A1 (en) * | 2014-04-02 | 2015-10-08 | Aptar Stelmi Sas | Anti-reflux syringe assembly |
| CN205759071U (en) * | 2016-03-28 | 2016-12-07 | 余利荣 | Novel low-resistance injector pushes away fluid column plug |
-
2016
- 2016-03-28 CN CN201610179392.1A patent/CN106310462A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001137338A (en) * | 1999-11-15 | 2001-05-22 | Kooki Engineering:Kk | Sliding member of syringe piston and its preparation process |
| CN2724733Y (en) * | 2004-09-15 | 2005-09-14 | 亨旺生化科技股份有限公司 | Back-drawing type safety syringe |
| CN102264414A (en) * | 2008-11-26 | 2011-11-30 | 阿西斯特医疗系统有限公司 | Apparatus and methods for fluid pressurizing units of injection systems |
| CN102526845A (en) * | 2010-12-13 | 2012-07-04 | 江苏亿乐医疗用品有限公司 | Safety self-destruction injector |
| CN202198927U (en) * | 2011-07-15 | 2012-04-25 | 曾花 | Self-destroying type syringe |
| CN202620377U (en) * | 2012-05-25 | 2012-12-26 | 山东新华安得医疗用品有限公司 | Low-resistance injector |
| WO2015150646A1 (en) * | 2014-04-02 | 2015-10-08 | Aptar Stelmi Sas | Anti-reflux syringe assembly |
| CN204017037U (en) * | 2014-08-28 | 2014-12-17 | 江波 | The syringe core rod of lower resistance |
| CN205759071U (en) * | 2016-03-28 | 2016-12-07 | 余利荣 | Novel low-resistance injector pushes away fluid column plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170111 |