CN104759005B - Low resistance syringe piston and syringe - Google Patents
Low resistance syringe piston and syringe Download PDFInfo
- Publication number
- CN104759005B CN104759005B CN201510188160.8A CN201510188160A CN104759005B CN 104759005 B CN104759005 B CN 104759005B CN 201510188160 A CN201510188160 A CN 201510188160A CN 104759005 B CN104759005 B CN 104759005B
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- Prior art keywords
- baffle plate
- sealing ring
- syringe
- low resistance
- clamping
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Abstract
The invention belongs to medical instruments field.Low resistance syringe piston, in sealing ring（3）Front end face in the middle part of offer locating slot（301）, sealing ring（3）In locating slot（301）The side wall formation sealing lip at place（302）, sealing lip（302）External diameter be more than sealing ring（3）The external diameter at rear portion；The baffle plate（5）Positioned at locating slot（301）It is interior, baffle plate（5）Circumference and sealing lip（302）Inwall contact and be from the front to the back gradually to the inclined wedge surface of radially inner side.Injection with low resistance, including syringe（1）, push rod（2）With above-mentioned low resistance syringe piston, baffle plate（5）With push rod（2）Front end is fixedly connected, sealing ring（3）It is fixed on baffle plate（5）Rear side, sealing lip（302）With syringe（1）Inwall contact.The present invention has good airproof performance, reliable operation, advantages of simple structure and simple.
Description
Technical field
The invention belongs to medical instruments field, and in particular to a kind of to reduce resistance between sealing ring and syringe inwall
A kind of low resistance syringe piston and syringe.
Background technology
Existing syringe is respectively and fixedly provided with a sealing ring in the front end of push rod to ensure to seal, and in sealing ring and syringe
There is very big frictional resistance between wall, cause operator to need that with very big power push rod could be promoted, although the note having at present
Emitter, which is employed, makes sealing ring technology for deforming during push rod is promoted, thus reduce sealing ring and syringe inwall it
Between resistance, but this syringe causes sealing ring due to sealing ring front end face and sealing ring support member contact area very little
Seal and cannot be guaranteed during deforming, reduce sealing reliability.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art there is provided one kind can adjust sealing ring with
Resistance, easy to operate, reliable operation low resistance syringe piston and syringe between syringe inwall.
The technical solution adopted for the present invention to solve the technical problems is：The low resistance syringe piston, including sealing ring
With the baffle plate for being arranged on sealing ring front end, it is characterised in that：Locating slot is offered in the middle part of the front end face of the sealing ring, is sealed
The side wall formation sealing lip enclosed at locating slot, the external diameter of sealing lip is more than the external diameter at sealing ring rear portion；The baffle plate is located at fixed
In the groove of position, the circumference of baffle plate is contacted with the inwall of sealing lip and is from the front to the back gradually to the inclined wedge surface of radially inner side.
It is preferred that, it is raised provided with least one circle deformation in the bottom of the locating slot.
It is preferred that, the deformation is raised to be located at close to the side of sealing lip root, the raised longitudinal section of deformation be by it is preceding extremely
The taper gradually increased afterwards, deforms raised front end with being abutted on rear side of baffle plate.
It is preferred that, the thickness of the baffle plate is less than the depth of locating slot.Baffle plate is set to occur certain axle with sealing ring
To relative movement, so as to further pass through the front end of baffle plate crush seal circle so that sealing ring further deforms, further
Reduction sealing ring and syringe inwall between resistance.
It is preferred that, the rear side of the baffle plate is provided with baffle plate blocking unit of the coaxial sleeve on the inside of the sealing ring, baffle wedge
Gu unit is fixed with push rod front end.
It is preferred that, the baffle plate blocking unit includes clamping cylinder, and clamping cylinder front end is integrally fixedly connected with baffle plate, blocks
Connecing the rear inside of cylinder has the clamping prominent to radially inner side raised.
A kind of injection with low resistance, it is characterised in that：Including syringe, push rod and above-mentioned low resistance syringe piston, gear
Plate is fixedly connected with push rod front end, and sealing ring is fixed on rear side of baffle plate, and push rod front end is additionally provided with the sealing of fixed seal ring rear end
Fixed mechanism after circle, sealing lip is contacted with the inwall of syringe.
It is preferred that, the baffle plate is fixed by baffle plate blocking unit and push rod.
It is preferred that, the baffle plate blocking unit includes being fixed in the clamping cylinder on rear side of baffle plate, the rear end of clamping cylinder
Side has the clamping prominent to radially inner side raised, and push rod is fixedly arranged at the front end with the clamping round platform stretched into clamping cylinder, clamping circle
The rear side of platform has the clamping groove with the raised phase clamping of clamping.
It is preferred that, the rear end face of the sealing ring is provided with a circle support protrusion, and sealing ring passes through support protrusion and sealing ring
Fixed mechanism is abutted afterwards.
It is preferred that, fixed mechanism is integrally fixed at the circular base slab of push rod front end, the circumference of supporting plate after the sealing ring
With syringe inwall interval setting.
It is preferred that, the V-shaped groove for the push rod that fractures is offered on the rib muscle of the push rod.
Compared with prior art, the beneficial effect that the above-mentioned technical proposal of the low resistance syringe piston and syringe has
It is really：
1st, when the pressure in syringe changes, sealing ring front end, which is forward extended out, to deform, so as to adjust sealing ring
With the pressure of syringe inwall, it is ensured that while sealing effectiveness, the resistance of reduction sealing ring and syringe inwall is easy to operate, and
Make it that sealing ring is fitted in deformation with syringe inwall with positioning the wedge surface of groove sidewall by the wedge surface of baffle plate circumference, further protect
The baffle arrangement demonstrate,proved in sealing effectiveness, and the present invention is simple, easy to process.
2nd, the thickness of baffle plate is less than the depth of locating slot, baffle plate is occurred certain axially opposing shifting with sealing ring
It is dynamic, so as to further pass through the front end of baffle plate crush seal circle so that sealing ring further deforms, further reduce close
Resistance between seal and syringe inwall.
3rd, when producing larger negative pressure or malleation in syringe, with positioning trench bottom axially opposing displacement occurs for baffle plate, this
When baffle plate can crimp it is raised so that the outside root of sealing lip is deformed to radial outside, closely pasted with syringe inwall
Close, it is ensured that the sealing of syringe.
4th, sealing ring is axially fixed in after baffle plate and sealing ring between fixed mechanism by being fixed, it is easy for installation,
Sound construction.
5th, sealing ring is abutted by support protrusion with fixed mechanism after sealing ring, in baffle plate crush seal circle, sealing ring
The support protrusion of rear end is further extruded with supporting plate, the rear end of sealing ring is deformed.
Brief description of the drawings
Fig. 1 is the structural representation of sealing ring embodiment 1 in low resistance syringe piston of the present invention.
Fig. 2 is the structural representation of baffle plate embodiment 1 in low resistance syringe piston of the present invention.
Fig. 3 is the structural representation of the low resistance syringe piston embodiment 1.
Fig. 4 is the partial enlarged drawing at A in Fig. 3.
Fig. 5 is the structural representation of injection with low resistance of the present invention.
Fig. 6 is the partial enlarged drawing at B in Fig. 5.
Fig. 7 is the structural representation of the low resistance syringe piston embodiment 2.
Fig. 8 is the partial enlarged drawing at C in Fig. 7.
Fig. 9 is depressed into the schematic diagram of positioning trench bottom for baffle plate in embodiment 2.
Figure 10 is the partial enlarged drawing at D in Fig. 9.
Wherein：1st, syringe 2, push rod 201, V-shaped groove 202, clamping round platform 3, sealing ring 301, locating slot 302, close
Seal lip 303, deformation projection 304, support protrusion 4, clamping cylinder 401, clamping projection 5, baffle plate 6, supporting plate.
Embodiment
1 ~ 10 pair of low resistance syringe piston and syringe of the present invention are described further below in conjunction with the accompanying drawings, wherein implementing
Example 2 is the most preferred embodiment of the low resistance syringe piston and syringe.
Embodiment 1
Reference picture 1~4, low resistance syringe piston, including sealing ring 3 and the baffle plate 5 for being arranged on sealing ring front end, close
Locating slot 301, side wall formation sealing lip 302 of the sealing ring 3 at locating slot 301, sealing are offered in the middle part of the front end face of seal 3
The external diameter of lip 302 is more than the external diameter at the rear portion of sealing ring 3；The baffle plate 5 is located in locating slot 301, the circumference and sealing lip of baffle plate 5
302 inwall is contacted and is from the front to the back gradually to the inclined wedge surface of radially inner side.Pressure in syringe 1 changes
When, the front end of sealing lip 302, which is forward extended out, to deform, so as to adjust the pressure of sealing ring 3 and the inwall of syringe 1, it is ensured that sealing effect
While fruit, the resistance of reduction sealing ring 3 and the inwall of syringe 1 is easy to operate, and the wedge surface by the circumference of baffle plate 5 and sealing
The wedge surface of the inwall of lip 302 make it that the crush seal lip 302 while forward extending out of sealing ring 3 is deformed to radial outside so that and pin
Cylinder 1 inwall laminating, is further ensured that the baffle plate 5 in sealing effectiveness, and the present embodiment is simple in construction, easy to process.
As further improving, the thickness of baffle plate 5 is less than the depth of locating slot 301 in the present embodiment, enables baffle plate 5
Certain axially opposing movement occurs for enough and sealing ring 3, so as to further pass through the front end of the crush seal circle 3 of baffle plate 5 so that close
Seal 3 further deforms, the resistance between further reduction sealing ring 3 and the inwall of syringe 1.
Preferably, baffle plate blocking unit of the rear side of baffle plate 5 provided with coaxial sleeve on the inside of the sealing ring 3, baffle plate is fixed
Unit is fixed with the front end of push rod 2.The low resistance syringe piston is fixed on push rod 2 by the connected mode of clamping,
It is easy for installation.Specifically, the present embodiment provides a kind of technical scheme of above-mentioned baffle plate blocking unit, baffle plate blocking unit includes card
Cylinder 4 is connect, the front end of clamping cylinder 4 is integrally fixedly connected with baffle plate 5, the rear inside of clamping cylinder 4, which has to radially inner side, dashes forward
The clamping projection 401 gone out.
Tested using above-mentioned low resistance syringe piston, lower resistance piston of the invention can be in malleation 200kp
Kept for 30 seconds, 88kp60 seconds No leakages of negative pressure, the lower resistance sealing piston for opening V-shaped groove in the front end of sealing ring 3 at present can only achieve
Malleation 120kp30 seconds, the effect of 50kp60 seconds No leakages of negative pressure, effect of the invention will be significantly better than current before sealing ring 3
The lower resistance sealing piston of V-shaped groove is opened at end, and the normal pressure mobile frictional force of the present invention is less than 5N.
Reference picture 5~6, the present invention also provides a kind of injection with low resistance, including syringe 1, push rod 2 and above-mentioned lower resistance
Syringe piston, baffle plate 5 is fixedly connected with the front end of push rod 2, and sealing ring 3 is fixed on the rear side of baffle plate 5, and the front end of push rod 2 is additionally provided with solid
Determine fixed mechanism after the sealing ring of the rear end of sealing ring 3, sealing lip 302 is contacted with the inwall of syringe 1, the rear side circumference of sealing ring 3 with
Formed between the inwall of syringe 1 and accommodate the space that sealing ring 3 is deformed.
The rear end face of sealing ring 3 is provided with a circle support protrusion 304 in reference picture 6, the present embodiment, and sealing ring 3 passes through support
Projection 304 is abutted with fixed mechanism after sealing ring, and in 5 crush seal circle 3 of baffle plate, the support protrusion 304 of the rear end of sealing ring 3 is entered
One step is extruded with supporting plate 6, the rear end of sealing ring 3 is deformed.The rear end of certain sealing ring 3 can also be as in Fig. 1
Shown is horizontal.Fixed mechanism is integrally fixed at the circular base slab 6 of the front end of push rod 2, the circumference and pin of supporting plate 6 after sealing ring
1 inwall interval setting of cylinder, is supported by supporting plate 6 to sealing ring 3, prevent the rear end of sealing ring 3 push rod 2 rib muscle it
Between deform, it is ensured that the reliable sealing of sealing ring 3 and the inwall of syringe 1.
Preferably, the baffle plate 5 in the present embodiment is fixed by baffle plate blocking unit with push rod 2, by being fixed
Sealing ring 3 is axially fixed in after baffle plate 5 and sealing ring between fixed mechanism, easy for installation, sound construction.Specifically, baffle plate
Blocking unit includes the clamping cylinder 4 for being fixed on the rear side of baffle plate 5, and the rear inside of clamping cylinder 4 is with prominent to radially inner side
Clamping projection 401, push rod 2 is fixedly arranged at the front end with the clamping round platform 202 stretched into clamping cylinder 4, the rear side tool of clamping round platform 202
There is the clamping groove with the raised 401 phase clampings of clamping.Clamping cylinder 4 is structure as a whole with baffle plate 5 in the present embodiment, structure letter
It is single, it is easy for installation, and by clamping projection 401 with after clamping groove clamping, baffle plate 5 and clamping cylinder 4 can not be torn open again
Unload, so as to avoid secondary recovery from using.Preferably, clamping round platform 202 is spherical structure, it is easy to clamping round platform 202 that clamping is convex
401 are played to strut.Clamping cylinder 4 can be continuous structure or the disrupted configuration for offering axial notch in the present embodiment.
Certainly the baffle plate 5 in the present invention can also be that hot melt is fixedly connected with push rod 2.
The V-shaped groove 201 for the push rod 2 that fractures is offered on the rib muscle of push rod 2, after syringe is using finishing, passes through V-arrangement
Groove 201 fractures push rod 2, it is to avoid the secondary recovery of syringe is used.
Embodiment 2
Reference picture 7~8, the present embodiment and the knot that the difference of embodiment 1 is sealing ring 3 in low resistance syringe piston
Structure, specifically, enclosing deformation projection 303 provided with least one in the bottom of the locating slot 301, larger bear is produced when syringe 1 is interior
When pressure or malleation, with the bottom of locating slot 301 axially opposing displacement occurs for baffle plate 5, the now meeting crimp of baffle plate 5 projection 303, from
And make it that the outside root of sealing lip 302 is deformed to radial outside, is brought into close contact, it is ensured that the sealing of syringe with the inwall of syringe 1
Property.
Further, deformation projection 303 is located at close to the side of the root of sealing lip 302, raised in the crimp of baffle plate 5
When 303, the outside root of sealing lip 302 can quickly deform, it is ensured that the reliability of sealing, and deform the vertical of projection 303
Section is the taper gradually increased from front to back, and with the gradually increase of pressure in syringe 1, the deformation of sealing ring 3 increases therewith,
So as to the function of reaching regulation resistance, seal.The front end of deformation projection 303 is abutted with the rear side of baffle plate 5.
Reference picture 9~10, the outside root of sealing lip 302 is can see to footpath by the compression of viewing hood 5 projection 303
Deform laterally, so that sealing ring 3 is brought into close contact with the inwall of syringe 1, it is ensured that sealed in syringe 1 during pressure increase
Reliability.Other structures be the same as Example 1.
The above, is only presently preferred embodiments of the present invention, is not the limitation for making other forms to the present invention, appoints
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (8)
1. a kind of low resistance syringe piston, including sealing ring（3）With the baffle plate for being arranged on sealing ring front end（5）, its feature exists
In：In the sealing ring（3）Front end face in the middle part of offer locating slot（301）, sealing ring（3）In locating slot（301）The side at place
Wall formation sealing lip（302）, sealing lip（302）External diameter be more than sealing ring（3）The external diameter at rear portion；The baffle plate（5）Positioned at fixed
Position groove（301）It is interior, baffle plate（5）Circumference and sealing lip（302）Inwall contact and be from the front to the back gradually to radially inner side
Inclined wedge surface；In the locating slot（301）Bottom it is raised provided with least one circle deformation（303）, the deformation projection（303）
Positioned at close to sealing lip（302）The side of root, deformation is raised（303）Longitudinal section be the taper that gradually increases from front to back,
Deformation is raised（303）Front end and baffle plate（5）Rear side is abutted.
2. low resistance syringe piston according to claim 1, it is characterised in that：The baffle plate（5）Thickness be less than it is fixed
Position groove（301）Depth.
3. low resistance syringe piston according to claim 1, it is characterised in that：The baffle plate（5）Rear side provided with same
Axle sleeve is in the sealing ring（3）The baffle plate blocking unit of inner side, baffle plate blocking unit and push rod（2）Front end is fixed.
4. low resistance syringe piston according to claim 3, it is characterised in that：The baffle plate blocking unit includes clamping
Cylinder（4）, clamping cylinder（4）Front end and baffle plate（5）Integrally it is fixedly connected, clamping cylinder（4）Rear inside have to radially
The clamping that inner side is protruded is raised（401）.
5. a kind of injection with low resistance, it is characterised in that：Including syringe（1）, push rod（2）With the lower resistance described in claim 1
Syringe piston, baffle plate（5）With push rod（2）Front end is fixedly connected, sealing ring（3）It is fixed on baffle plate（5）Rear side, push rod（2）Before
End is additionally provided with fixed seal ring（3）Fixed mechanism after the sealing ring of rear end, sealing lip（302）With syringe（1）Inwall contact.
6. injection with low resistance according to claim 5, it is characterised in that：The baffle plate（5）Pass through baffle plate blocking unit
With push rod（2）It is fixed.
7. injection with low resistance according to claim 6, it is characterised in that：The baffle plate blocking unit includes being fixed on gear
Plate（5）The clamping cylinder of rear side（4）, clamping cylinder（4）Rear inside have the clamping prominent to radially inner side raised
（401）, push rod（2）It is fixedly arranged at the front end with and stretches into clamping cylinder（4）Interior clamping round platform（202）, clamping round platform（202）Rear side tool
Have raised with clamping（401）The clamping groove of phase clamping.
8. injection with low resistance according to claim 5, it is characterised in that：The sealing ring（3）Rear end face be provided with one
Enclose support protrusion（304）, sealing ring（3）Pass through support protrusion（304）Abutted with fixed mechanism after sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510188160.8A CN104759005B (en) | 2015-04-21 | 2015-04-21 | Low resistance syringe piston and syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510188160.8A CN104759005B (en) | 2015-04-21 | 2015-04-21 | Low resistance syringe piston and syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104759005A CN104759005A (en) | 2015-07-08 |
| CN104759005B true CN104759005B (en) | 2017-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510188160.8A Expired - Fee Related CN104759005B (en) | 2015-04-21 | 2015-04-21 | Low resistance syringe piston and syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104759005B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI737742B (en) * | 2016-06-22 | 2021-09-01 | 德商梅茲製藥有限兩合公司 | Botulinum toxin prefilled syringe system, kit having the same and use thereof |
| CN109481787A (en) * | 2018-12-20 | 2019-03-19 | 伦若森 | A kind of injection with low resistance |
| US11707576B2 (en) * | 2019-09-19 | 2023-07-25 | Avent, Inc. | Plunger gasket with reduced surface contact |
| CN114294999A (en) * | 2021-11-30 | 2022-04-08 | 湖南航天机电设备与特种材料研究所 | Throwing device and throwing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204601283U (en) * | 2015-04-21 | 2015-09-02 | 山东淄博山川医用器材有限公司 | Low resistance syringe piston and syringe |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397313A (en) * | 1994-01-27 | 1995-03-14 | The Kendall Company | Low friction syringe |
| US6004300A (en) * | 1997-08-28 | 1999-12-21 | Butcher; Robert M | Composite hypodermic syringe piston |
| CN201143332Y (en) * | 2008-01-27 | 2008-11-05 | 房东森 | Disposable syringe piston |
| CN102631731B (en) * | 2012-03-30 | 2013-11-13 | 杭州龙德医用器械有限公司 | Low-resistance syringe |
| CN202605444U (en) * | 2012-03-30 | 2012-12-19 | 杭州龙德医用器械有限公司 | Low-resistance piston assembly of syringe |
| CN202605442U (en) * | 2012-03-30 | 2012-12-19 | 杭州龙德医用器械有限公司 | Low resistance syringe |
| CN102631732B (en) * | 2012-03-30 | 2013-11-13 | 杭州龙德医用器械有限公司 | Low-resistance piston component of syringe |
-
2015
- 2015-04-21 CN CN201510188160.8A patent/CN104759005B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204601283U (en) * | 2015-04-21 | 2015-09-02 | 山东淄博山川医用器材有限公司 | Low resistance syringe piston and syringe |
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| Publication number | Publication date |
|---|---|
| CN104759005A (en) | 2015-07-08 |
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