CN104759005A - Low-resistance injector piston and injector - Google Patents
Low-resistance injector piston and injector Download PDFInfo
- Publication number
- CN104759005A CN104759005A CN201510188160.8A CN201510188160A CN104759005A CN 104759005 A CN104759005 A CN 104759005A CN 201510188160 A CN201510188160 A CN 201510188160A CN 104759005 A CN104759005 A CN 104759005A
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- CN
- China
- Prior art keywords
- baffle plate
- sealing ring
- clamping
- low resistance
- push rod
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Abstract
The invention belongs to the field of medical instruments and discloses a low-resistance injector piston. A locating groove (301) is formed in the middle of the front end face of a seal ring (3), a seal lip (302) is formed at the side wall, located at the locating groove (301), of the seal ring (3), and the outer diameter of the seal lip (302) is larger than the outer diameter of the back of the seal ring (3). A baffle (5) is located in the locating groove (301), the circumference of the baffle (5) makes contact with the inner wall of the seal lip (302), and the baffle (5) and the seal lip (302) are both wedged faces gradually inclining towards the radial inner sides from fronts to backs. A low-resistance injector comprises a needle cylinder (1), a push rod (2) and the low-resistance injector piston, the baffle (5) is fixedly connected with the front end of the push rod (2), the seal ring (3) is fixed at the back side of the baffle (5), and the seal lip (302) makes contact with the inner wall of the needle cylinder (1). The low-resistance injector piston and the injector have the advantages of being good in sealing performance, reliable in work, simple in structure and the like.
Description
Technical field
The invention belongs to medical instruments field, be specifically related to a kind of a kind of low resistance syringe piston and the syringe that can reduce resistance between sealing ring and syringe inwall.
Background technology
Existing syringe is for ensureing sealing, a sealing ring is all fixed with in the front end of push rod, and there is between sealing ring and syringe inwall very large frictional resistance, operator is caused to need could promote push rod by very large power, the syringe had at present make sealing ring in the technology promoting to deform in the process of push rod although have employed, thus the resistance reduced between sealing ring and syringe inwall, but this syringe due to sealing ring front end face and sealing ring support component contact area very little, cause sealing ring to seal in the process deformed can not be guaranteed, reduce sealing reliability.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of low resistance syringe piston and the syringe that can regulate the resistance between sealing ring and syringe inwall, easy to operate, reliable operation.
The technical solution adopted for the present invention to solve the technical problems is: this low resistance syringe piston, comprise sealing ring and the baffle plate being arranged on sealing ring front end, it is characterized in that: in the middle part of the front end face of described sealing ring, offer locating slot, the sidewall of sealing ring at locating slot place forms sealing lip, and the external diameter of sealing lip is greater than the external diameter at sealing ring rear portion; Described baffle plate is positioned at locating slot, the circumference of baffle plate and the contact internal walls of sealing lip and all for by after forward direction gradually to the wedge surface that radially inner side tilts.
Preferably, the distortion of at least one circle is provided with in the bottom of described locating slot protruding.
Preferably, described distortion projection is positioned at the side near sealing lip root, and the longitudinal section of distortion projection is the taper increased gradually from front to back, and the front end of distortion projection abuts with on rear side of baffle plate.
Preferably, the thickness of described baffle plate is less than the degree of depth of locating slot.Enable baffle plate and sealing ring that certain axial relative movement occur, thus further by the front end of baffle plate crush seal circle, sealing ring is deformed further, further reduce the resistance between sealing ring and syringe inwall.
Preferably, the rear side of described baffle plate is provided with the baffle plate blocking unit of coaxial sleeve inside described sealing ring, and baffle plate blocking unit and push rod front end are fixed.
Preferably, described baffle plate blocking unit comprises clamping cylinder, and clamping cylinder front end is integrally fixedly connected with baffle plate, and the rear inside of clamping cylinder has the clamping projection outstanding to radially inner side.
A kind of injection with low resistance, it is characterized in that: comprise syringe, push rod and above-mentioned low resistance syringe piston, baffle plate is fixedly connected with push rod front end, sealing ring is fixed on rear side of baffle plate, push rod front end is also provided with fixed mechanism after the sealing ring of fixed seal ring rear end, the contact internal walls of sealing lip and syringe.
Preferably, described baffle plate is fixed by clamping mechanism and push rod.
Preferably, described clamping mechanism comprises the clamping cylinder be fixed on rear side of baffle plate, the rear inside of clamping cylinder has the clamping projection outstanding to radially inner side, push rod front end is fixed with the clamping round platform stretched in clamping cylinder, and the rear side of clamping round platform has the clamping groove of the protruding phase clamping with clamping.
Preferably, the rear end face of described sealing ring is provided with a circle support protrusion, and sealing ring is abutted with fixed mechanism after sealing ring by support protrusion.
Preferably, after described sealing ring, fixed mechanism is the circular base slab being fixed on push rod front end, and circumference and the syringe inwall interval of gripper shoe are arranged.
Preferably, the rib muscle of described push rod offers the V-shaped groove for the push rod that fractures.
Compared with prior art, the beneficial effect that the technique scheme of this low resistance syringe piston and syringe has is:
1, when the pressure in syringe changes, sealing ring front end is stretched out forward and is deformed, thus regulate the pressure of sealing ring and syringe inwall, while ensureing sealing effectiveness, reduce the resistance of sealing ring and syringe inwall, easy to operate, and make sealing ring when being out of shape by the wedge surface of baffle plate circumference and the wedge surface of locating slot sidewall and syringe inwall is fitted, further guarantee sealing effectiveness, and baffle arrangement in the present invention is simple, easy to process.
2, the thickness of baffle plate is less than the degree of depth of locating slot, enable baffle plate and sealing ring that certain axial relative movement occur, thus further by the front end of baffle plate crush seal circle, sealing ring is deformed further, further reduce the resistance between sealing ring and syringe inwall.
3, when producing larger negative pressure or malleation in syringe, bottom baffle plate and locating slot, axial relative displacement occurs, now baffle plate meeting crimp is protruding, thus the outside root radius vector of sealing lip is out of shape laterally, fit tightly with syringe inwall, ensure the sealing of syringe.
4, by being fixed sealing ring is axially fixed in after baffle plate and sealing ring between fixed mechanism, easy for installation, sound construction.
5, sealing ring is abutted with fixed mechanism after sealing ring by support protrusion, and when baffle plate crush seal circle, the support protrusion of sealing ring rear end extrudes with gripper shoe further, and the rear end of sealing ring is deformed.
Accompanying drawing explanation
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 this low resistance syringe piston embodiment 1.
Fig. 4 is the partial enlarged drawing at A place 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 place in Fig. 5.
Fig. 7 is the structural representation of this low resistance syringe piston embodiment 2.
Fig. 8 is the partial enlarged drawing at C place in Fig. 7.
Fig. 9 is that in embodiment 2, baffle plate is depressed into the schematic diagram bottom locating slot.
Figure 10 is the partial enlarged drawing at D place in Fig. 9.
Wherein: 1, syringe 2, push rod 201, V-shaped groove 202, clamping round platform 3, sealing ring 301, locating slot 302, sealing lip 303, distortion projection 304, support protrusion 4, clamping cylinder 401, clamping projection 5, baffle plate 6, gripper shoe.
Detailed description of the invention
Be described further below in conjunction with accompanying drawing 1 ~ 10 pair of low resistance syringe piston of the present invention and syringe, wherein embodiment 2 is most preferred embodiments of this low resistance syringe piston and syringe.
Embodiment 1
With reference to Fig. 1 ~ 4, low resistance syringe piston, comprise sealing ring 3 and the baffle plate 5 being arranged on sealing ring front end, locating slot 301 is offered in the middle part of the front end face of sealing ring 3, the sidewall of sealing ring 3 at locating slot 301 place forms sealing lip 302, and the external diameter of sealing lip 302 is greater than the external diameter at sealing ring 3 rear portion; Described baffle plate 5 is positioned at locating slot 301, the circumference of baffle plate 5 and the contact internal walls of sealing lip 302 and all for by after forward direction gradually to the wedge surface that radially inner side tilts.When pressure in syringe 1 changes, sealing lip 302 front end is stretched out forward and is deformed, thus regulate the pressure of sealing ring 3 and syringe 1 inwall, while ensureing sealing effectiveness, reduce the resistance of sealing ring 3 and syringe 1 inwall, easy to operate, and make sealing ring 3 crush seal lip 302 while stretching out forward to be out of shape to radial outside thus to fit with syringe 1 inwall by the wedge surface of baffle plate 5 circumference and the wedge surface of sealing lip 302 inwall, further guarantee sealing effectiveness, and baffle plate 5 structure in the present embodiment is simple, easy to process.
As further improving, in the present embodiment, the thickness of baffle plate 5 is less than the degree of depth of locating slot 301, make baffle plate 5 with sealing ring 3, certain axial relative movement can occur, thus further by the front end of baffle plate 5 crush seal circle 3, sealing ring 3 is deformed further, further reduces the resistance between sealing ring 3 and syringe 1 inwall.
Preferably, the rear side of baffle plate 5 is provided with the baffle plate blocking unit of coaxial sleeve inside described sealing ring 3, and baffle plate blocking unit and push rod 2 front end are fixed.By the connected mode of clamping, this low resistance syringe piston is fixed on push rod 2, easy for installation.Concrete, the present embodiment provides a kind of technical scheme of above-mentioned baffle plate blocking unit, baffle plate blocking unit comprises clamping cylinder 4, and clamping cylinder 4 front end is integrally fixedly connected with baffle plate 5, and the rear inside of clamping cylinder 4 has the clamping projection 401 outstanding to radially inner side.
Above-mentioned low resistance syringe piston is utilized to test, lower resistance piston of the present invention can keep 30 seconds at malleation 200kp, negative pressure 88kp60 No leakage second, the lower resistance packed-piston opening V-shaped groove at present in sealing ring 3 front end can only reach malleation 120kp30 second, negative pressure 50kp60 second leak free effect, effect of the present invention will significantly better than the current lower resistance packed-piston opening V-shaped groove in sealing ring 3 front end, and normal pressure of the present invention moves frictional force and is less than 5N.
With reference to Fig. 5 ~ 6, the present invention also provides a kind of injection with low resistance, comprise syringe 1, push rod 2 and above-mentioned low resistance syringe piston, baffle plate 5 is fixedly connected with push rod 2 front end, sealing ring 3 is fixed on rear side of baffle plate 5, push rod 2 front end is also provided with fixed mechanism after the sealing ring of fixed seal ring 3 rear end, and sealing lip 302 and the contact internal walls of syringe 1, form the space holding sealing ring 3 and be out of shape between circumference and syringe 1 inwall on rear side of sealing ring 3.
With reference to Fig. 6, in the present embodiment, the rear end face of sealing ring 3 is provided with a circle support protrusion 304, sealing ring 3 is abutted with fixed mechanism after sealing ring by support protrusion 304, when baffle plate 5 crush seal circle 3, the support protrusion 304 of sealing ring 3 rear end extrudes with gripper shoe 6 further, and the rear end of sealing ring 3 is deformed.The rear end of certain sealing ring 3 also can be horizontal as shown in Figure 1.After sealing ring, fixed mechanism is the circular base slab 6 being fixed on push rod 2 front end, circumference and the syringe 1 inwall interval of gripper shoe 6 are arranged, supported by gripper shoe 6 pairs of sealing rings 3, prevent the rear end of sealing ring 3 from deforming between the rib muscle of push rod 2, guarantee the positiver sealing of sealing ring 3 and syringe 1 inwall.
Preferably, the baffle plate 5 in the present embodiment is fixed by clamping mechanism and push rod 2, to be axially fixed in by sealing ring 3 after baffle plate 5 and sealing ring between fixed mechanism by being fixed, easy for installation, sound construction.Concrete, clamping mechanism comprises the clamping cylinder 4 be fixed on rear side of baffle plate 5, the rear inside of clamping cylinder 4 has the clamping projection 401 outstanding to radially inner side, push rod 2 front end is fixed with the clamping round platform 202 stretched in clamping cylinder 4, and the rear side of clamping round platform 202 has the clamping groove of the protruding 401 phase clampings with clamping.Clamping cylinder 4 and baffle plate 5 are structure as a whole in the present embodiment, and structure is simple, easy for installation, and by after clamping protruding 401 and the clamping of clamping groove, baffle plate 5 and clamping cylinder 4 cannot be dismantled again, thus avoid secondary recovery to use.Preferably, clamping round platform 202 is spherical structure, is convenient to clamping round platform 202 and clamping projection 401 is strutted.In the present embodiment, clamping cylinder 4 can be continuous structure, also can be the disrupted configuration offering axial notch.Baffle plate 5 in certain the present invention and push rod 2 can also be that hot melt is fixedly connected with.
The rib muscle of push rod 2 offers the V-shaped groove 201 for the push rod 2 that fractures, after syringe is finished using, by V-shaped groove 201, push rod 2 is fractureed, avoid the secondary recovery of syringe to use.
Embodiment 2
With reference to Fig. 7 ~ 8, the difference of the present embodiment and embodiment 1 is the structure of sealing ring 3 in low resistance syringe piston, concrete, at least one circle distortion protruding 303 is provided with in the bottom of described locating slot 301, when producing larger negative pressure or malleation in syringe 1, axial relative displacement is there is bottom baffle plate 5 and locating slot 301, now baffle plate 5 meeting crimp projection 303, thus the outside root radius vector of sealing lip 302 is out of shape laterally, fit tightly with syringe 1 inwall, ensure the sealing of syringe.
Further, this distortion projection 303 is positioned at the side near sealing lip 302 root, when baffle plate 5 crimp projection 303, the outside root of sealing lip 302 can deform fast, guarantee the reliability sealed, and the longitudinal section of distortion protruding 303 is the taper increased gradually from front to back, along with the increase gradually of pressure in syringe 1, the distortion of sealing ring 3 increases thereupon, thus reaches the function regulating resistance, sealing.The front end of distortion protruding 303 abuts with on rear side of baffle plate 5.
With reference to Fig. 9 ~ 10, can see that outside sealing lip 302, root radius vector deforms laterally by viewing hood 5 compression projection 303, thus sealing ring 3 and syringe 1 inwall are fitted tightly, the reliability of sealing when ensureing that in syringe 1, pressure increases.Other structures are with embodiment 1.
The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (10)
1. a low resistance syringe piston, comprise sealing ring (3) and be arranged on the baffle plate (5) of sealing ring front end, it is characterized in that: in the middle part of the front end face of described sealing ring (3), offer locating slot (301), the sidewall of sealing ring (3) at locating slot (301) place forms sealing lip (302), and the external diameter of sealing lip (302) is greater than the external diameter at sealing ring (3) rear portion; Described baffle plate (5) is positioned at locating slot (301), the circumference of baffle plate (5) and the contact internal walls of sealing lip (302) and all for by after forward direction gradually to the wedge surface that radially inner side tilts.
2. low resistance syringe piston according to claim 1, is characterized in that: be provided with at least one circle distortion protruding (303) in the bottom of described locating slot (301).
3. low resistance syringe piston according to claim 2, it is characterized in that: described distortion protruding (303) is positioned at the side near sealing lip (302) root, the longitudinal section of distortion protruding (303) is the taper increased gradually from front to back, and the front end of distortion protruding (303) abuts with baffle plate (5) rear side.
4. the low resistance syringe piston according to claim 1 or 3, is characterized in that: the thickness of described baffle plate (5) is less than the degree of depth of locating slot (301).
5. injection with low resistance according to claim 1, is characterized in that: the rear side of described baffle plate (5) is provided with the baffle plate blocking unit of coaxial sleeve in described sealing ring (3) inner side, and baffle plate blocking unit and push rod (2) front end are fixed.
6. low resistance syringe piston according to claim 5, it is characterized in that: described baffle plate blocking unit comprises clamping cylinder (4), clamping cylinder (4) front end is integrally fixedly connected with baffle plate (5), and the rear inside of clamping cylinder (4) has the clamping projection (401) outstanding to radially inner side.
7. an injection with low resistance, it is characterized in that: comprise syringe (1), push rod (2) and the low resistance syringe piston described in any one of claim 1 ~ 6, baffle plate (5) is fixedly connected with push rod (2) front end, sealing ring (3) is fixed on baffle plate (5) rear side, push rod (2) front end is also provided with fixed mechanism after the sealing ring of fixed seal ring (3) rear end, the contact internal walls of sealing lip (302) and syringe (1).
8. injection with low resistance according to claim 7, is characterized in that: described baffle plate (5) is fixed by clamping mechanism and push rod (2).
9. injection with low resistance according to claim 8, it is characterized in that: described clamping mechanism comprises the clamping cylinder (4) being fixed on baffle plate (5) rear side, the rear inside of clamping cylinder (4) has the clamping projection (401) outstanding to radially inner side, push rod (2) front end is fixed with the clamping round platform (202) stretched in clamping cylinder (4), and the rear side of clamping round platform (202) has the clamping groove with clamping projection (401) phase clamping.
10. injection with low resistance according to claim 7, is characterized in that: the rear end face of described sealing ring (3) is provided with a circle support protrusion (304), and sealing ring (3) is abutted with fixed mechanism after sealing ring by support protrusion (304).
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 true CN104759005A (en) | 2015-07-08 |
| CN104759005B 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109069755A (en) * | 2016-06-22 | 2018-12-21 | 梅尔兹制药公司 | Botulin toxin Prefilled syringe system |
| CN109481787A (en) * | 2018-12-20 | 2019-03-19 | 伦若森 | A kind of injection with low resistance |
| CN114514045A (en) * | 2019-09-19 | 2022-05-17 | 阿文特公司 | Plunger seal with reduced surface contact |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN102631731A (en) * | 2012-03-30 | 2012-08-15 | 杭州龙德医用器械有限公司 | Low-resistance syringe |
| CN102631732A (en) * | 2012-03-30 | 2012-08-15 | 杭州龙德医用器械有限公司 | Low-resistance piston component of 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 |
| 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 |
-
2015
- 2015-04-21 CN CN201510188160.8A patent/CN104759005B/en not_active Expired - Fee Related
Patent Citations (8)
| 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 |
| CN102631731A (en) * | 2012-03-30 | 2012-08-15 | 杭州龙德医用器械有限公司 | Low-resistance syringe |
| CN102631732A (en) * | 2012-03-30 | 2012-08-15 | 杭州龙德医用器械有限公司 | Low-resistance piston component of 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 |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109069755A (en) * | 2016-06-22 | 2018-12-21 | 梅尔兹制药公司 | Botulin toxin Prefilled syringe system |
| CN109069755B (en) * | 2016-06-22 | 2022-04-19 | 梅尔兹制药公司 | Botulinum toxin prefilled syringe system |
| US11331434B2 (en) | 2016-06-22 | 2022-05-17 | Merz Pharma Gmbh & Co. Kgaa | Botulinum toxin prefilled syringe system |
| CN109481787A (en) * | 2018-12-20 | 2019-03-19 | 伦若森 | A kind of injection with low resistance |
| CN114514045A (en) * | 2019-09-19 | 2022-05-17 | 阿文特公司 | Plunger seal with reduced surface contact |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104759005B (en) | 2017-07-11 |
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