CN205759071U - Novel low-resistance injector pushes away fluid column plug - Google Patents
Novel low-resistance injector pushes away fluid column plug Download PDFInfo
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- CN205759071U CN205759071U CN201620240737.5U CN201620240737U CN205759071U CN 205759071 U CN205759071 U CN 205759071U CN 201620240737 U CN201620240737 U CN 201620240737U CN 205759071 U CN205759071 U CN 205759071U
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- acting surface
- piston
- installation portion
- contact site
- wall
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Abstract
The utility model discloses a kind of novel low-resistance injector and push away fluid column plug, including installation portion and piston, piston bush is contained on installation portion, and installation portion sidewall has the first circumferentially disposed acting surface of the portion of being fitted around and the second acting surface；First acting surface and the second acting surface are sequentially distributed on the axial direction of installation portion from top to bottom, and, from top to bottom, the first acting surface is gradually increased to the distance of installation portion centrage, and the second acting surface is gradually reduced to the distance of installation portion centrage；It is positioned at the position corresponding with the first acting surface on piston inner wall and is provided with the first contact site, first contact site and the contact of the first acting surface coordinate, it is positioned at the position corresponding with the second acting surface on piston inner wall and is provided with the second contact site, the second contact site and the contact cooperation of the second acting surface.Pushing away during fluid column plug pushes away drawing liquid, this structure can make piston and injection tube inwall remain good contact condition, it is ensured that syringe pushes away drawing liquid smoothly, and after piston is aging, still can use.
Description
Technical field
This utility model relates to syringe art, and 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, joins by sealing between rubber and injection tube
Close, then by push-and-pull push away fluid column plug fluid push rod drive piston in injection tube movement realization push away liquid and drawing liquid.And using
Cheng Zhong, such as during drawing liquid, due to suction function, piston there will be a certain degree of contraction distortion, in this case, as
What really piston size during fabrication was done is not very accurate, then be likely to depart from syringe inwall, and then cannot realize drawing liquid.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
Technical problem to be solved in the utility model is to provide a kind of novel low-resistance injector to push away fluid column plug, is pushing away
During fluid column plug pushes away drawing liquid, piston and injection tube inwall can be made to remain good contact condition, it is ensured that syringe
Push away drawing liquid smoothly, and after piston is aging, still can use.
For solving above-mentioned existing technical problem, this utility model uses following scheme: novel low-resistance injector pushes away liquid
Plunger, including installation portion and piston, described piston bush is contained on installation portion, and it is circumferential that described installation portion sidewall has the portion that is fitted around
The first acting surface arranged and the second acting surface；Described first acting surface and the second acting surface on the axial direction of installation portion from
Upper and under be sequentially distributed, and, from top to bottom, the first acting surface to the distance of installation portion centrage is gradually increased, and second acts on
Face is gradually reduced to the distance of installation portion centrage；It is positioned at the position corresponding with the first acting surface on piston inner wall and is provided with first
Contact site, the first contact site and the contact of the first acting surface coordinate, and piston inner wall is positioned at the position corresponding with the second acting surface
It is provided with the second contact site, the second contact site and the contact of the second acting surface to coordinate.
In this utility model, relating to upper and lower that wait the noun of locality, all with syringe under vertical laying state, syringe needle is upward
For reference.
In this utility model, by arranging the first acting surface and the second acting surface at the sidewall of installation portion, and incite somebody to action the two
Being arranged to following structure: from top to bottom, the first acting surface is gradually increased to the distance of installation portion centrage, and the second acting surface is to peace
The distance of dress portion centrage is gradually reduced, and in use, syringe is during drawing liquid, and the piston portion of being mounted opposite upwards moves
Dynamic, now, the second contact site prolongs the second acting surface and moves up, and due to the effect of the second acting surface, the second contact site is by second
Acting surface outwardly against so that make piston outer wall face be pushed outwardly, make the piston outside wall surface at this position keep with in syringe
Wall contacts, thus ensures to seal between syringe；Syringe is during pushing away liquid, and the piston portion of being mounted opposite moves down, this
Time, the 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 by the first acting surface
Outwardly against, make the piston outside wall surface at this position keep and syringe contact internal walls, thus ensure to seal between syringe.
As preferably, described first contact site is protruding the first internal projection at piston inner wall, and described second contact site is
Protruding the second internal projection at piston inner wall, described piston part between the first internal projection and the second lobe and installation portion
Between there is gap.By the first contact site and the second contact site are arranged to bulge-structure, make piston in the first internal projection and
Forming gap between part and installation portion between second lobe, during pushing away liquid and drawing liquid, piston is made relative to first
When moving with face and the second acting surface, frictional force is little, and using effect is good.
As preferably, described piston outer wall is provided around piston in the position corresponding with the first contact site circumferentially disposed
First flange, described piston outer wall is provided around circumferentially disposed second convex of piston in the position corresponding with the second contact site
Edge.By position corresponding with the first contact site and the second contact site on piston outer wall, the first flange and the second flange are set,
Sealed with syringe contact internal walls by the first flange and the second flange, syringe resistance during pushing away drawing liquid can be reduced
Power.
As preferably, what described installation portion sidewall was positioned at the first acting surface is arranged over screens flange, and described installation portion exists
Forming groove between first acting surface and screens flange, on described piston inner wall, position in respective slot is provided with and stretches in groove
Stretch into portion.Stretching into portion by arranging to stretch on piston inner wall in groove, during drawing liquid, piston is had spacing by groove
Effect, 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 and first
Acting surface is corresponding and shape is relative with the first acting surface, the first internal face and the contact of the first acting surface, the second internal face position
Put corresponding with the second acting surface and shape is relative with the second acting surface, the second internal face and the contact of the second acting surface, described
Stating the first contact site is the first internal face, and described second contact site is the second wall.By piston inner wall being arranged to and installing
The structure that portion's outer wall shape is directly corresponding, the first internal face directly contacts with the first acting surface, and the second internal face is directly with second
Acting surface contacts, it is also possible to reach same effect.
As preferably, described piston is provided around in the position corresponding with the first contact site piston is circumferentially disposed first
Flange, described piston is provided around the second flange that piston is circumferentially disposed in the position corresponding with the second contact site.
As preferably, described piston is circulus, and the upper end of installation portion is exposed at piston exterior.Under this structure, live
Fill in 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 acting surface and the
The plane of symmetry of two acting surfaces is symmetrical.Owing to the first acting surface and the second effect are symmetrical, and piston is also symmetrical structure, this
Sample piston is forward and reverse all can be installed.
Beneficial effect:
After this utility model uses technique scheme, by arranging the first acting surface and second at the sidewall of installation portion
Acting surface, and the two is arranged to following structure: from top to bottom, the first acting surface gradually increases to the distance of installation portion centrage
Greatly, the second acting surface is gradually reduced to the distance of installation portion centrage, in use, syringe during taking out and pushing away liquid,
Can ensure that and seal between piston and syringe.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional view of piston in this utility model embodiment one；
Fig. 2 is the longitudinal sectional view of installation portion in this utility model embodiment one；
Fig. 3 is the sectional view of the fit structure of piston and installation portion in this utility model embodiment one；
Fig. 4 is the top view of the fit structure of piston and installation portion in this utility model embodiment one；
Fig. 5 is the sectional view of the fit structure of piston and installation portion in this utility model embodiment two；
Fig. 6 is the sectional view of the fit structure of piston and installation portion in this utility model embodiment three；
Fig. 7 is the sectional view of the fit structure of piston and installation portion in this utility model embodiment four；
Fig. 8 is the sectional view of the fit structure of piston and installation portion in this utility model embodiment five；
Fig. 9 is the sectional view of the fit structure of piston and installation portion in this utility model embodiment six；
Figure 10 is the sectional view of the fit structure of piston and installation portion in this utility model embodiment seven.
Detailed description of the invention
Embodiment one:
As shown in Figures 1 to 4, this utility model novel low-resistance injector pushes away fluid column plug and mainly (is not shown in figure by fluid push rod
Go out), installation portion 1 and piston 2 form, installation portion is detachably arranged in the end of fluid push rod, concrete, has inside installation portion
Installation cavity 14, the bottom end opening of installation cavity 14 forms a reducing, and fluid push rod end is provided with dop, and fluid push rod dop passes through reducing card
Making installation portion be arranged on fluid push rod in entering installation cavity 14, the cross section outline of installation portion is circle, and piston is circular ring,
Piston 2 integral assembling is on installation portion 1, and the upper end of installation portion 1 is exposed outside piston 2, in the schematic diagram of Fig. 1 to Fig. 3, lives
The section of plug, installation portion and the two longitudinal sectional view coordinated is all through piston, the centrage of installation portion.
There is the first acting surface 3 and the second acting surface 4 that the portion of being fitted around is circumferentially disposed in the lateral wall of installation portion 1；The
One acting surface 3 and the second acting surface 4 are sequentially distributed on the axial direction of installation portion 1 from top to bottom, and, from top to bottom, the
One acting surface 3 is gradually increased to the distance of installation portion 1 centrage, and the second acting surface 4 gradually subtracts to the distance of installation portion 1 centrage
Little, the first acting surface 3 and the second acting surface 4 shape are similar to the side of circular cone structure, and the two is face symmetrical structure, and
First acting surface 3 is joined directly together towards one end of the first acting surface 3 towards one end of the second acting surface 4 with the second acting surface 4, this
Plant under structure, in the longitudinal sectional view of installation portion 1, the installation portion 1 portion between the first acting surface 3 and the second acting surface 4
Divide and form triangular shape structure.
The structure of piston 2 is the symmetrical structure that the plane of symmetry about the first acting surface 3 and the second acting surface 4 is symmetrical, piston 2
It is positioned at the position corresponding with the first acting surface 3 on inwall and is provided with protruding the first internal projection 5 at piston inner wall, this first convex
Play 5 compositions and contact the first contact site coordinated with the first acting surface 3；It is positioned at corresponding with the second acting surface 4 on piston 2 inwall
Position is provided with protruding the second internal projection 6 at piston inner wall, and this second internal projection 6 composition contacts cooperation with the second acting surface 4
Second contact site, under this structure, between the piston 2 part and installation portion 1 between the first internal projection 5 and the second lobe 6
Form gap 7.
It is provided around the first flange 9 that piston 2 is circumferentially disposed in the position corresponding with the first contact site on piston 2 outer wall,
It is provided around the second flange 10 that piston 2 is circumferentially disposed in the position corresponding with the second contact site on piston 2 outer wall.
What installation portion 1 sidewall was positioned at the first acting surface 3 is arranged over slightly convex screens flange 8, screens flange 8 towards
The formation inclined-plane, side 81 of the first acting surface 3, and on the axial direction of installation portion, from top to bottom, this inclined-plane 81 is to installing
The distance of portion 1 centrage is gradually reduced, and installation portion 1 forms groove between the first acting surface 3 and the inclined-plane 81 of screens flange 8
11, the first internal projection 5 position is set just in groove 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 is only by the first effect
Face 3 and the second acting surface 4 form.
Embodiment three:
As shown in Figure 6, this embodiment is with the difference of embodiment one: in the longitudinal sectional view of installation portion 1, peace
The dress portion 1 part between the first acting surface 3 and the second acting surface 4 forms semicircle shape structure.
Embodiment four:
As it is shown in fig. 7, the difference of this embodiment and embodiment one is: in the longitudinal sectional view of installation portion 1, peace
The dress portion 1 part between the first acting surface 3 and the second acting surface 4 forms herringbone structure.
Embodiment five:
As shown in Figure 8, this embodiment is with the difference of embodiment one: in the longitudinal sectional view of installation portion 1, peace
Dress portion 1 is connected by transition face 15 between the first acting surface 3 and the second acting surface 4, forms trapezium structure between three.
Embodiment six:
As it is shown in figure 9, the difference of this embodiment and embodiment one is: piston inner wall be provided with the first internal face 12 and
Second wall 13, the position of the first internal face 12 is corresponding with the first acting surface 3 and shape is relative with the first acting surface 3, the
One internal face 12 contacts with the first acting surface 3, and now the first internal face 12 constitutes the first contact site, the second internal face 13 position with
Second acting surface 4 is corresponding and shape is relative with the second acting surface 4, and the second internal face 13 contacts, now with the second acting surface 4
Second wall 13 constitutes the second contact site.On piston 2 at the position corresponding with the first contact site namely the first internal face 12 right
It is provided around the first flange 9 that piston 2 is circumferentially disposed, in the range of Ying on piston 2 in the position corresponding with the second contact site also
The second flange 10 that piston 2 is circumferentially disposed it is provided around in scope corresponding to i.e. second internal face 13.
Embodiment seven:
As shown in Figure 10, this embodiment is with the difference of embodiment six: installation portion 1 be positioned at the first acting surface 3 and
Being connected by transition face 15 between second acting surface 4, wherein transition face 15 is inner concave.
Claims (8)
1. novel low-resistance injector pushes away fluid column plug, and including installation portion (1) and piston (2), described piston (2) is sleeved on installation portion
(1) on, it is characterised in that: described installation portion (1) sidewall has the first acting surface (3) and second that the portion of being fitted around is circumferentially disposed
Acting surface (4)；Described first acting surface (3) and the second acting surface (4) on the axial direction of installation portion (1) the most successively
Distribution, and, from top to bottom, the first acting surface (3) is gradually increased to the distance of installation portion (1) centrage, the second acting surface (4)
Distance to installation portion (1) centrage is gradually reduced；The position corresponding with the first acting surface (3) it is positioned on piston (2) inwall
It is provided with the first contact site, the first contact site and the first acting surface (3) contact to coordinate, piston (2) inwall is positioned at and the second effect
Corresponding position, face (4) is provided with the second contact site, the second contact site and the second acting surface (4) contact and coordinates.
Novel low-resistance injector the most according to claim 1 pushes away fluid column plug, it is characterised in that: described first contact site is
Protruding the first internal projection (5) at piston inner wall, described second contact site is protruding the second internal projection (6) at piston inner wall,
Described piston (2) has gap between part and the installation portion (1) between the first internal projection (5) and the second lobe (6)
(7)。
Novel low-resistance injector the most according to claim 2 pushes away fluid column plug, it is characterised in that: described piston (2) outer wall
On be provided around, in the position corresponding with the first contact site, the first flange (9) that piston (2) is circumferentially disposed, described piston (2) is outward
It is provided around the second flange (10) that piston (2) is circumferentially disposed in the position corresponding with the second contact site on wall.
Novel low-resistance injector the most according to claim 1 pushes away fluid column plug, it is characterised in that: described installation portion (1) side
What wall was positioned at the first acting surface (3) is arranged over screens flange (8), and described installation portion (1) is convex at the first acting surface (3) and screens
Forming groove (11) between edge (8), on described piston (2) inwall, position in respective slot (11) is provided with and stretches in groove (11)
Stretch into portion.
Novel low-resistance injector the most according to claim 1 pushes away fluid column plug, it is characterised in that: described piston inner wall is provided with
First internal face (12) and the second wall (13), the position of the first internal face (12) is corresponding with the first acting surface (3) and shape
Shape and the first acting surface (3) are relative, and the first internal face (12) contacts with the first acting surface (3), the second internal face (13) position and
Second acting surface (4) is corresponding and shape is relative with the second acting surface (4), the second internal face (13) and the second acting surface (4)
Contact, described first contact site is the first internal face (12), and described second contact site is the second wall (13).
Novel low-resistance injector the most according to claim 5 pushes away fluid column plug, it is characterised in that: on described piston (2)
The position corresponding with the first contact site is provided around the first flange (9) that piston (2) is circumferentially disposed, on described piston (2) with
The position that second contact site is corresponding is provided around the second flange (10) that piston (2) is circumferentially disposed.
Novel low-resistance injector the most according to claim 1 pushes away fluid column plug, it is characterised in that: described piston (2) is ring
Shape structure, the upper end of installation portion (1) is exposed at piston (2) outward.
Novel low-resistance injector the most according to claim 1 pushes away fluid column plug, it is characterised in that: described first acting surface
(3) and the second acting surface (4) face is symmetrical, and described piston (2) is about the first acting surface (3) and the plane of symmetry of the second acting surface (4)
Symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620240737.5U CN205759071U (en) | 2016-03-28 | 2016-03-28 | Novel low-resistance injector pushes away fluid column plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620240737.5U CN205759071U (en) | 2016-03-28 | 2016-03-28 | Novel low-resistance injector pushes away fluid column plug |
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| Publication Number | Publication Date |
|---|---|
| CN205759071U true CN205759071U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620240737.5U Active CN205759071U (en) | 2016-03-28 | 2016-03-28 | Novel low-resistance injector pushes away fluid column plug |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106310462A (en) * | 2016-03-28 | 2017-01-11 | 余利荣 | Syringe solution pushing plunger |
-
2016
- 2016-03-28 CN CN201620240737.5U patent/CN205759071U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106310462A (en) * | 2016-03-28 | 2017-01-11 | 余利荣 | Syringe solution pushing plunger |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |