CN108904928A - A kind of high-pressure injection syringe cylinder structure - Google Patents
A kind of high-pressure injection syringe cylinder structure Download PDFInfo
- Publication number
- CN108904928A CN108904928A CN201810948636.7A CN201810948636A CN108904928A CN 108904928 A CN108904928 A CN 108904928A CN 201810948636 A CN201810948636 A CN 201810948636A CN 108904928 A CN108904928 A CN 108904928A
- Authority
- CN
- China
- Prior art keywords
- piston
- syringe
- pressure injection
- cylinder structure
- sealing ring
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 96
- 239000007924 injection Substances 0.000 title claims abstract description 96
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000007373 indentation Methods 0.000 claims description 7
- 239000013013 elastic material Substances 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000002872 contrast media Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
- A61M5/3129—Syringe barrels
-
- 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
- A61M5/3129—Syringe barrels
- A61M2005/3131—Syringe barrels specially adapted for improving sealing or sliding
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a kind of high-pressure injection syringe cylinder structures, including：Piston, syringe and sealing ring, the piston jacket are equipped with sealing ring, and the piston can move back and forth in syringe；Described syringe one end is equipped with injection head；It is characterized in that, the piston is recessed close to one end of injection head to internal piston.It the advantage is that, the piston structure being internally recessed, the suffered resistance of motion is directed toward piston exterior perpendicular to portion surface is injected in the component for injecting portion surface during its injection liquid, the component does not generate extruding to piston at this time, matching relationship between sealing ring and syringe will not be had an impact, the leakproofness of high-pressure injection syringe is then realized without increasing the frictional force between sealing ring and syringe, the thrust applied during high-pressure injection needed for push rod can be reduced, the stability of high-pressure injection process is improved；Simultaneously as the component does not generate extruding to piston, under the premise of guaranteeing safety injection, the requirement to piston intensity is reduced.
Description
Technical field
The present invention relates to field of medical products, and in particular to a kind of high-pressure injection syringe cylinder structure.
Background technique
Ancillary equipment of the high pressure injector generally as X-ray production apparatus, CT, MRI or other diagnostic equipments.High pressure injector can
In angiocarpy to guarantee in a short time to concentrate contrast medium injection patient, filled in high concentration by inspection position, to absorb medicine
The preferable image of liquid.Contrast medium injection, host exposure and record changer can also be made to change piece three's cooperation simultaneously, to improve
The accuracy of photography and the success rate of radiography.
High-pressure injection syringe generally connects high pressure injector and carries out injecting liquid drug.The piston one of existing high-pressure injection syringe
It holds tapered.Piston jacket sets sealing ring, and piston moves back and forth in syringe.As shown in Figure 1, since piston is tapered, in work
During filling in injection liquid, piston is by moving contrary resistance of motion f.Resistance of motion f is in piston suffered by piston
Internal piston is directed toward perpendicular to piston tapered side in one direction component f2 of tapered side.It is acted on by component f2, piston will be received
To extruding.And when component f2 acts on piston and syringe link position, due to the effect of the component, between sealing ring and syringe
It is likely to occur gap, influences the leakproofness of high-pressure injection syringe.Existing solution be by increase sealing ring and syringe it
Between frictional force, there is leakage phenomenon to avoid high-pressure injection syringe, this kind of solution is due to increasing sealing ring and syringe
Between frictional force, cause the thrust applied needed for push rod to increase, increase the security risk during high-pressure injection.Meanwhile
Due to the component extrusion piston, it is desirable that piston itself needs to have biggish intensity.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, it is an object of that present invention to provide a kind of lower height for injecting resistance
Press injection needle tube.
A kind of high-pressure injection syringe cylinder structure of the present invention, including：Piston, syringe and sealing ring, the piston jacket
Equipped with sealing ring, the piston can move back and forth in syringe；Described syringe one end is equipped with injection head；It is characterized in that, described
Piston is recessed close to one end of injection head to internal piston.
Preferably, the piston includes forced section and injects portion, described to inject portion close to one end of injection head in centre bit
Conical indentation is installed；The portion of injecting is elastic material.
Preferably, the forced section is being equipped with arc convex with the link position in the portion of injecting, and the portion that injects is far from taper
One end of recess is equipped with arc groove compatible with arc convex.
Preferably, the elasticity modulus for injecting portion is gradually reduced from edge to center.
Preferably, the marginal position that the piston is equipped with one end of conical indentation extends to form extension；The syringe exists
Position corresponding with extension is equipped with the protrusion for carrying out detent to extension.
Preferably, the extension is tapered, and development length is less than 2mm.
Preferably, the sealing ring cross-section parallelogram.
Preferably, side of the one group of parallel edges in its section of sealing ring perpendicular to piston recessed position.
A kind of high-pressure injection syringe cylinder structure of the present invention, the advantage is that, the piston structure being internally recessed, at it
The suffered resistance of motion is directed toward piston exterior perpendicular to portion surface is injected in the component for injecting portion surface during injection liquid, this
When the component not to piston generate extruding, the matching relationship between sealing ring and syringe will not be had an impact, then without increase
Frictional force between sealing ring and syringe realizes the leakproofness of high-pressure injection syringe, can reduce during high-pressure injection needed for push rod
The thrust of application improves the stability of high-pressure injection process；Simultaneously as the component does not generate extruding to piston, guaranteeing
Under the premise of safety injection, the requirement to piston intensity is reduced.
Detailed description of the invention
Fig. 1 is the force analysis figure of tapered piston in the prior art.
Fig. 2 is a kind of force analysis figure of high-pressure injection syringe cylinder structure of the present invention.
Fig. 3 is a kind of one of the structural schematic diagram of high-pressure injection syringe cylinder structure of the present invention.
Fig. 4 is a kind of second structural representation of high-pressure injection syringe cylinder structure of the present invention.
Fig. 5 is a kind of third structural representation of high-pressure injection syringe cylinder structure of the present invention.
Fig. 6 is the structural schematic diagram of location A in Fig. 4.
Fig. 7 is the structural schematic diagram of B location in Fig. 4.
Description of symbols：1- piston, 11- forced section, 12- inject portion, 13- extension, 2- syringe, 21- injection head,
22- protrusion, 3- sealing ring, the f- tapered piston resistance of motion, f1- tapered piston the first component of the resistance of motion, f2- tapered piston fortune
Dynamic resistance second component；F '-recess piston motion resistance, f ' 1- recess the first component of piston motion resistance, f ' 2- recess piston
Resistance of motion second component.
Specific embodiment
As shown in Figure 2 and Figure 3, a kind of high-pressure injection syringe cylinder structure of the present invention, including：Piston 1 and syringe 2, piston
1 is set in syringe 2, and piston 1 can move back and forth in syringe 2；2 one end of syringe is equipped with injection head 21；Piston 1 is close to injection head
21 one end is equipped with conical indentation in center.Piston 1 is equipped with groove compatible with push rod far from one end of injection head 21,
For connecting push rod.Push rod pushes piston 1 to move back and forth in syringe 2.In medical fluid bolus infusion processes, resistance f ' suffered by piston 1
Component direction be respectively to be directed toward the f ' 2 outside piston 1 and f ' along 1 recessed position side of piston perpendicular to tapered recessed surface
1.Since f ' 2 is directed toward outside piston 1 perpendicular to tapered recessed surface, the component does not generate extruding to piston 1 at this time, will not be to close
Matching relationship between seal and syringe has an impact, then realizes high pressure injection without increasing the frictional force between sealing ring and syringe
The leakproofness of syringe is penetrated, the required thrust applied of push rod during high-pressure injection can be reduced, improve the steady of high-pressure injection process
It is qualitative；Simultaneously as the component does not generate extruding to piston, under the premise of guaranteeing safety injection, reduce to piston intensity
Requirement.
As shown in figure 4, piston 1 divides for two parts, including being arranged far from the forced section 11 of injection head 21 and close to injection
First 11 inject portion 12.Forced section 11 is fixedly connected with the portion of injecting 12, and forced section 11 is made of hard material, separate to inject portion
12 one end is equipped with groove compatible with push rod, for connecting push rod.The one end of portion 12 far from forced section 11 is injected to stress
11 direction of portion recess injects portion 12 in conical shaped depression.Injecting portion 12 is elastic material.A kind of high-pressure injection syringe cylinder structure
During injection liquid, 11 one end of forced section connection push rod is injected, and 1 drawn stem of piston acts on injection liquid, herein
In the process, portion 12 is injected by the restriction effect of syringe 2 and forced section 11 will not deformation occurs.When the EDGE CONTACT in the portion of injecting 12 arrives
After injection head 21, inject portion 12 and start to be squeezed and deformed, at this time depression in centre position also not in contact with arrive injection head 21.Push rod continues to push away
Piston 1 travels forward, and as piston 1 travels forward, injects 12 medium position of portion and moves closer to injection head 12, and injecting portion 12 will
Medical fluid is injected into injection head.With backed off after random push rod, push rod band piston 1 moves backward, injects the exiting with piston 1 of portion 12
Restore deformation, injecting liquid drug process is completed.What is be recessed inwardly injects portion 12 in bolus infusion processes, the direction of the suffered resistance of motion
It vertically is directed toward piston exterior with 12 surface of the portion of injecting, the component of the resistance of motion does not generate extruding to piston 1 at this time, will not be to sealing
Matching relationship between circle and syringe has an impact, then realizes high-pressure injection without increasing the frictional force between sealing ring and syringe
The leakproofness of syringe can reduce the required thrust applied of push rod during high-pressure injection, improve the stabilization of high-pressure injection process
Property；Simultaneously as the component does not generate extruding to piston, under the premise of guaranteeing safety injection, reduce to piston intensity
It is required that.Injecting portion 12 is elastic material, can effectively reduce medical fluid surplus by the elastic deformation in the portion of injecting 12, improve the benefit of medical fluid
With rate.
As shown in figure 5, forced section 11 is being equipped with arc convex with the link position in the portion of injecting 12, portion 12 is injected far from taper
One end of recess is equipped with arc groove compatible with arc convex.Injecting portion 12 is elastic material, in the mistake of 1 injection liquid of piston
Cheng Zhong, when the portion of injecting 12 contact injection head 21 when, inject portion 21 and start to be squeezed and deformed, due to forced section 11 with the portion of injecting 12
Link position is equipped with arc convex, and arc convex has supporting role to the deformation in the portion of injecting 12, injects the compression of 12 surrounding of portion at this time,
Center is upheld forward, keeps 12 center of the portion of injecting smaller at a distance from injection head 21.And injection head 21 is tapered, injects
The adhered shape arc convex in portion 12 makes the injecting more sufficiently to medical fluid of the portion of injecting 12.
The elasticity modulus for injecting portion 12 is gradually reduced from edge to center.The mistake that injection head 21 deforms is contacted in the portion of injecting 12
Cheng Zhong, the edge for injecting portion 12 contact injection head 21 first, and the amount of elastic deformation for injecting 12 edge of portion is maximum.Portion 12 is injected in setting
Elasticity modulus be gradually reduced from edge to center, then in the central contact injection head 21 in the portion of injecting 12, apply needed for push rod
Thrust it is smaller.The elasticity modulus for injecting portion 12 is gradually reduced from edge to center, can reduce push rod institute during high-pressure injection
The thrust that need to apply improves the safety in injection process.
As shown in Figure 6, Figure 7, the marginal position that piston 1 is equipped with one end of conical indentation extends to form extension 13；Syringe 2
The protrusion 22 for carrying out detent to extension 13 is equipped in position corresponding with extension 13.Extension 13 is wedge shaped.Extend
The development length in portion 13 is less than 2mm.In the process of 12 injection liquid of the portion of injecting, the edge for injecting portion 12 connects with injection head 21 first
Touching, since injection head 21 is tapered, inner wall has constant slope.When the portion of injecting 12 EDGE CONTACT to injection head 21 inner wall
Afterwards, it may occur however that along the movement tendency of 21 inner wall slide downward of injection head, this movement tendency is unfavorable for the portion of injecting 12 and injection
First 21 juxtaposition metamorphose injection liquid.So compatible extension 13 and protrusion 22 is respectively set.Protrusion 22 is for extension
13 carry out detent, and limitation injects portion 12 along the movement tendency of 21 slide downward of injection head, makes the portion of injecting 12 along 2 axial deformation of syringe
Injection liquid avoids the appearance that medical fluid injects insufficient phenomenon.Simultaneously because the development length very little of extension 13, and be wedge
Shape, medical fluid are not easy to remain in the groove that protrusion 22 is formed with 2 inner wall of syringe, make injecting more sufficiently for medical fluid.
3 section parallelogram of sealing ring, the side of one group of parallel edges in section perpendicular to 1 recessed position of piston.
One component of the resistance of motion as suffered by piston 1 is directed toward outside piston 1 perpendicular to tapered recessed surface, and setting sealing ring 3 is cut
Face parallelogram, and one group of parallel edges in its section is perpendicular to the side of 1 recessed position of piston.In 1 injection liquid of piston
During, the section of sealing ring 3 and the component of the resistance of motion suffered by piston 1 extend in the same direction, and keep the stress of sealing ring 3 more steady
It is fixed, it avoids sealing ring 3 from the phenomenon that stress inclination occur, improves the leakproofness of high-pressure injection process.
A kind of high-pressure injection syringe cylinder structure of the present invention, the piston structure being internally recessed, in its injection liquid
The suffered resistance of motion is directed toward piston exterior perpendicular to portion surface is injected in the component for injecting portion surface in the process, and the component is not at this time
Extruding is generated to piston, the matching relationship between sealing ring and syringe will not be had an impact, then without increasing sealing ring and needle
Frictional force between cylinder realizes the leakproofness of high-pressure injection syringe, can reduce pushing away of applying during high-pressure injection needed for push rod
Power improves the stability of high-pressure injection process；Simultaneously as the component does not generate extruding to piston, guaranteeing safety injection
Under the premise of, reduce the requirement to piston intensity.
For those skilled in the art, it can make other each according to the above description of the technical scheme and ideas
The corresponding change of kind and deformation, and all these changes and deformation all should belong to the protection model of the claims in the present invention
Within enclosing.
Claims (9)
1. a kind of high-pressure injection syringe cylinder structure, including：Piston (1), syringe (2) and sealing ring (3), the piston (1) are arranged outside
Have sealing ring (3), the piston (1) can move back and forth in syringe (2)；Described syringe (2) one end is equipped with injection head (21)；Its
Be characterized in that, the piston (1) close to injection head (21) one end to piston (1) inner recess.
2. a kind of high-pressure injection syringe cylinder structure according to claim 1, which is characterized in that the piston (1) is close to injection head
(21) one end forms conical indentation to piston (1) is internal in center.
3. a kind of high-pressure injection syringe cylinder structure according to claim 2, which is characterized in that the piston (1) includes far from note
The forced section (11) of head (21) and injecting portion (12) close to injection head (21) are penetrated, inject portion (12) are close to injection head (21)
One end center be equipped with conical indentation；Described inject portion (12) are elastic material.
4. a kind of high-pressure injection syringe cylinder structure according to claim 3, which is characterized in that the forced section (11) with inject
The link position in portion (12) is equipped with arc convex, and inject portion (12) are equipped with and arc convex phase far from one end of conical indentation
The arc groove of adaptation.
5. a kind of high-pressure injection syringe cylinder structure according to claim 3, which is characterized in that the springform for injecting portion (12)
Amount is gradually reduced from edge to center.
6. a kind of high-pressure injection syringe cylinder structure according to claim 3, which is characterized in that it is recessed that the piston (1) is equipped with taper
The marginal position of sunken one end extends to form extension (13)；The syringe (2) is equipped in position corresponding with extension (13)
For extension (13) to be carried out with the protrusion (22) of detent.
7. a kind of high-pressure injection syringe cylinder structure according to claim 6, which is characterized in that the extension (13) is wedge shaped,
Its development length is less than 2mm.
8. a kind of high-pressure injection syringe cylinder structure according to claim 1, which is characterized in that sealing ring (3) section is in flat
Row quadrangle.
9. a kind of high-pressure injection syringe cylinder structure according to claim 8, which is characterized in that its section of sealing ring (3)
Side of one group of parallel edges perpendicular to piston (1) recessed position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810948636.7A CN108904928A (en) | 2018-08-20 | 2018-08-20 | A kind of high-pressure injection syringe cylinder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810948636.7A CN108904928A (en) | 2018-08-20 | 2018-08-20 | A kind of high-pressure injection syringe cylinder structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108904928A true CN108904928A (en) | 2018-11-30 |
Family
ID=64404813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810948636.7A Pending CN108904928A (en) | 2018-08-20 | 2018-08-20 | A kind of high-pressure injection syringe cylinder structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108904928A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1057487A (en) * | 1996-06-21 | 1998-03-03 | Debiotech Sa | Syringe for medical use |
| JPH1099433A (en) * | 1996-09-17 | 1998-04-21 | Ryuyu Chin | Syringe of double safety structure |
| CN2870869Y (en) * | 2005-09-09 | 2007-02-21 | 余利荣 | Low-resistance safety syringe |
| CN101559248A (en) * | 2008-04-16 | 2009-10-21 | 关绍雷 | Pen core of concave-type piston of pen-type insulin syringe |
| CN101940808A (en) * | 2010-08-12 | 2011-01-12 | 骆忠林 | Disposable all-plastic self-destruction syringe |
| CN102085403A (en) * | 2009-12-08 | 2011-06-08 | 上海双鸽实业有限公司 | Piston for injector |
| CN203280850U (en) * | 2013-05-16 | 2013-11-13 | 盛州橡塑胶（苏州）有限公司 | Syringe piston |
| CN209301912U (en) * | 2018-08-20 | 2019-08-27 | 广州友沃医疗用品有限公司 | A kind of high-pressure injection syringe cylinder structure |
-
2018
- 2018-08-20 CN CN201810948636.7A patent/CN108904928A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1057487A (en) * | 1996-06-21 | 1998-03-03 | Debiotech Sa | Syringe for medical use |
| JPH1099433A (en) * | 1996-09-17 | 1998-04-21 | Ryuyu Chin | Syringe of double safety structure |
| CN2870869Y (en) * | 2005-09-09 | 2007-02-21 | 余利荣 | Low-resistance safety syringe |
| CN101559248A (en) * | 2008-04-16 | 2009-10-21 | 关绍雷 | Pen core of concave-type piston of pen-type insulin syringe |
| CN102085403A (en) * | 2009-12-08 | 2011-06-08 | 上海双鸽实业有限公司 | Piston for injector |
| CN101940808A (en) * | 2010-08-12 | 2011-01-12 | 骆忠林 | Disposable all-plastic self-destruction syringe |
| CN203280850U (en) * | 2013-05-16 | 2013-11-13 | 盛州橡塑胶（苏州）有限公司 | Syringe piston |
| CN209301912U (en) * | 2018-08-20 | 2019-08-27 | 广州友沃医疗用品有限公司 | A kind of high-pressure injection syringe cylinder structure |
Non-Patent Citations (1)
| Title |
|---|
| 黄素素;张晓彤;张帅;王丽娇;刘玉君;刘彦慧;: "新型注射器的设计与应用", 解放军护理杂志, vol. 33, no. 15, pages 75 - 76 * |
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