CN104906667B - Injection with low resistance - Google Patents
Injection with low resistance Download PDFInfo
- Publication number
- CN104906667B CN104906667B CN201510307057.0A CN201510307057A CN104906667B CN 104906667 B CN104906667 B CN 104906667B CN 201510307057 A CN201510307057 A CN 201510307057A CN 104906667 B CN104906667 B CN 104906667B
- Authority
- CN
- China
- Prior art keywords
- cylinder
- piston
- sealing ring
- core bar
- connecting rod
- 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.)
- Active
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31513—Piston constructions to improve sealing or sliding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/48—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 having means for varying, regulating, indicating or limiting injection pressure
- A61M5/482—Varying injection pressure, e.g. by varying speed of injection
-
- 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
- A61M5/48—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 having means for varying, regulating, indicating or limiting injection pressure
- A61M5/484—Regulating injection pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31501—Means for blocking or restricting the movement of the rod or piston
- A61M2005/31508—Means for blocking or restricting the movement of the rod or piston provided on the piston-rod
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 belongs to medical appliance fields, more particularly to a kind of injection with low resistance, including cylinder, piston and core bar, connecting rod is arranged in core bar front end, connecting rod head shape matches with cylinder inner top, it is the hollow cylinder of bottom opening below connecting rod head, the outermost diameter on core bar head is more than the outer diameter of hollow cylinder and the internal diameter less than cylinder, and connecting-rod cap portion is located in the cavity of hollow cylinder；Piston is tightly placed on the excircle of above-mentioned hollow cylinder, there is the upper annular groove of opening upwards on the upper surface of piston, there are the lower annular groove that Open Side Down, the upper and lower end face most peripheral of piston to be equipped with sealing ring on lower face, the outer diameter of sealing ring is more than the internal diameter of cylinder.Since the frictional force between the sealing ring and cylinder of piston most peripheral changes with the variation of cylinder internal pressure, piston easily slides in cylinder, and resistance is small when use, is a kind of ideal injection with low resistance；Piston keeps sealing by sealing ring and cylinder, No leakage.
Description
Technical field
The present invention relates to a kind of injection with low resistance, belong to medical appliance field.
Background technology
Syringe is common a kind of medical apparatus in clinic, is usually made of cylinder, piston, core bar, above-mentioned group
At syringe be generally made of high molecular material, do not leaked between piston and cylinder in order to prevent, there is good sealing
Effect, piston must have enough interference volumes between cylinder, but big interference volume makes operator that need to use larger power ability
Piston is set to move.In addition also there is glass syringe, be usually made of cylinder and core bar, frictional force is small between core bar and cylinder, resistance
Power is small, and sliding capability is excellent, but instrument is easily broken during production and transportation, is allowed to use.
Invention content
According to the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to：A kind of piston and cylinder are provided
Frictional resistance between inner wall can change with pressure size and change and can reduce the injection with low resistance of frictional resistance.
Connecting rod, connection is arranged in injection with low resistance of the present invention, including cylinder, piston and core bar, core bar front end
Club head shape matches with cylinder inner top, is the hollow cylinder of bottom opening, connecting rod head below connecting rod head
Outermost diameter be more than hollow cylinder outer diameter and less than cylinder internal diameter, pin head portion is located at the cavity of hollow cylinder
It is interior；Piston is tightly placed on the excircle of above-mentioned hollow cylinder, there is the upper annular groove of opening upwards, lower end on the upper surface of piston
There are the lower annular groove that Open Side Down, the upper and lower end face most peripheral of piston to be equipped with sealing ring on face, the outer diameter of sealing ring is more than cylinder
The internal diameter of body.
There is anticreep protrusion, corresponding anticreep protrusion back-off card is arranged on core bar head on the inner wall of above-mentioned hollow cylinder
Block, core bar head is inserted into from below in the hollow cylinder of connecting rod and the cooperation by being buckled to fixture block, anticreep protrusion makes core bar
Engage with connecting rod, is convenient for assembling the hollow cylinder on core bar head and connecting rod by this structure.Preferably, core
The size of the back-off fixture block of club head is more than the size of the anticreep protrusion of connecting rod hollow cylinder, can make core bar head in this way
It is more firmly caught in the hollow cylinder body of connecting rod.
The notch longitudinal cross-section of the upper annular groove of above-mentioned piston is V-shaped or inverted trapezoidal, the notch of lower annular groove are longitudinally cut
Face is in reverse V-shaped or trapezoidal.
Operation principle and process：
When pumping liquid, external atmospheric pressure is higher than cylinder lumen and the pressure in piston, and lower annular groove is extraneous big
The sealing ring of lower face is forced to be flared out under the action of atmospheric pressure, at this time the contact surface of the sealing ring and cylinder inboard wall of lower face
Increase, leakproofness enhancing, as pressure reduces, the sealing ring of lower face is shunk under the action of elasticity, returns to state；
When injecting liquid forward, core bar is pushed, the liquid of inner barrel is compressed by piston, so that internal pressure is more than outer
Portion's pressure, upper annular groove are under pressure flared out the sealing ring of upper surface, at this time the sealing ring and cylinder of upper surface
The contact surface of inner wall increases, and leakproofness enhancing, as pressure reduces, the sealing ring of upper surface is shunk under the action of elasticity, extensive
Initial state is arrived again.
It can be seen from the above, this syringe construction is simple, due to the frictional force between the sealing ring and cylinder of piston most peripheral
Changing with the variation of cylinder internal pressure, therefore piston easily slides in cylinder, force of sliding friction is small, and resistance is small when use,
It is a kind of ideal injection with low resistance.
Except above-mentioned points, the sealing ring of piston most peripheral keeps sealing with cylinder inboard wall always, it is ensured that syringe was using
No leakage in journey.
Possessed advantageous effect is the present invention compared with prior art：
This injection with low resistance is simple in structure, and the frictional force between the sealing ring and cylinder of piston most peripheral is in cylinder
The variation of pressure and change, so that piston is easily slided in cylinder, resistance is small when use；Piston is begun by the sealing ring of its most peripheral
It keeps sealing with cylinder inboard wall eventually, it is ensured that syringe No leakage in use.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of core bar；
Fig. 3 is the structural schematic diagram of connecting rod；
Fig. 4 is the structural schematic diagram of piston.
In figure：1, cylinder；2, core bar；3, piston；4, connecting rod；5, core bar head；6, it is buckled to fixture block；7, connecting-rod cap
Portion；8, hollow cylinder；9, anticreep protrusion；10, upper annular groove；11, sealing ring；12, lower annular groove.
Specific implementation mode
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in figures 1-4, this injection with low resistance includes cylinder 1, piston 3 and core bar 2, and connecting rod is arranged in 2 front end of core bar
4, shape and 1 inner top of cylinder on connecting rod head 7 match, and 7 or less connecting rod head is the hollow cylinder of bottom opening
8, the outermost diameter on connecting rod head 7 is more than the outer diameter of hollow cylinder 8 and the internal diameter less than cylinder 1, and core bar head 5 is located at
In the cavity of hollow cylinder 8；Piston 3 is tightly placed on the excircle of above-mentioned hollow cylinder 8 (the i.e. outer diameter of hollow cylinder 8
More than the internal diameter of piston 3), there is the upper annular groove 10 of opening upwards on the upper surface of piston 3, has on lower face under Open Side Down
The upper and lower end face most peripheral of annular groove 12, piston 3 is equipped with sealing ring 11, and the outer diameter of sealing ring 11 is more than the internal diameter of cylinder 1.
1 inner top shape of the present embodiment middle cylinder body is umbrella, therefore the connecting rod head 7 to match with 1 inner top of cylinder is also umbrella,
And the angular dimension of 7 umbrella of connecting rod head changes with the angle of 1 inner top of cylinder.
Wherein：There is anticreep protrusion 9, if corresponding anticreep protrusion 9 is arranged on core bar head 5 on the inner wall of hollow cylinder 8
Dry back-off fixture block 6, core bar head 5 are inserted into the hollow cylinder 8 of connecting rod 4 and from below by being buckled to fixture block 6, anticreep protrusion
9 cooperation makes core bar 2 engage with connecting rod 4, is convenient for the hollow cylinder 8 on core bar head 5 and connecting rod 4 by this structure
It is assembled.Preferably, the size of the back-off fixture block 6 on core bar head 5 is more than the anticreep protrusion 9 of connecting rod hollow cylinder 8
Size makes core bar head 5 more firmly be caught in the hollow cylinder 8 of connecting rod 4.The notch of the upper annular groove 10 of piston 3
Longitudinal cross-section is V-shaped or inverted trapezoidal, and the notch longitudinal cross-section of lower annular groove 12 is in reverse V-shaped or trapezoidal.
Operation principle and process：
When pumping liquid, external atmospheric pressure is higher than 1 inner cavity of cylinder and the pressure in piston 3, and lower annular groove 12 is outside
The sealing ring 11 of lower face is forced to be flared out under the action of boundary's atmospheric pressure, at this time in the sealing ring 11 Yu cylinder 1 of lower face
The contact surface of wall increases, and leakproofness enhancing, as pressure reduces, the sealing ring 11 of lower face is shunk under the action of elasticity, extensive
Initial state is arrived again；
When injecting liquid forward, core bar 2 is pushed, the liquid inside cylinder 1 is compressed by piston 3, keeps internal pressure big
In external pressure, upper annular groove 10 is under pressure flared out the sealing ring 11 of upper surface, at this time the sealing of upper surface
Circle 11 and the contact surface of 1 inner wall of cylinder increase, leakproofness enhancing, and as pressure reduces, the sealing ring 11 of upper surface is in elasticity
Effect is lower to shrink, and returns to state.
It can be seen from the above, this syringe construction is simple, due to rubbing between the sealing ring 11 and cylinder 1 of 3 most peripheral of piston
It wipes power with the variation of pressure in cylinder 1 to change, therefore the sliding easily in the cylinder 1 of piston 3, force of sliding friction is small, when use
Resistance is small, is a kind of ideal injection with low resistance, and piston 3 by the sealing ring 11 of its most peripheral always in cylinder 1
Wall keeps sealing, it is ensured that syringe No leakage in use.
Claims (4)
1. a kind of injection with low resistance, including cylinder (1), piston (3) and core bar (2), it is characterised in that：Core bar (2) front end is set
Connecting rod (4) is set, connecting rod head (7) shape matches with cylinder (1) inner top, is that bottom is opened below connecting rod head (7)
The outermost diameter of the hollow cylinder (8) of mouth, connecting rod head (7) is more than the outer diameter of hollow cylinder (8) and is less than cylinder
(1) internal diameter, core bar head (5) are located in the cavity of hollow cylinder (8)；Piston (3) is tightly placed in above-mentioned hollow cylinder (8)
Excircle on, have the upper annular groove (10) of opening upwards on the upper surface of piston (3), have the lower ring that Open Side Down on lower face
The upper and lower end face most peripheral of shape slot (12), piston (3) is equipped with sealing ring (11), and the outer diameter of sealing ring (11) is more than cylinder (1)
Internal diameter；
When pumping liquid, external atmospheric pressure exists higher than cylinder (1) inner cavity and the pressure in piston (3), lower annular groove (12)
The sealing ring (11) of lower face is forced to be flared out under the action of external atmospheric pressure, at this time the sealing ring (11) and cylinder of lower face
The contact surface of body (1) inner wall increases, leakproofness enhancing, and as pressure reduces, the sealing ring (11) of lower face is in elastic effect
Lower contraction, returns to state；
When injecting liquid forward, core bar (2) is pushed, the internal liquid of cylinder (1) is compressed by piston (3), makes internal pressure
More than external pressure, upper annular groove (10) is under pressure flared out the sealing ring (11) of upper surface, at this time upper surface
The contact surface of sealing ring (11) and cylinder (1) inner wall increase, leakproofness enhancing, as pressure reduces, the sealing ring of upper surface
(11) it is shunk under the action of elasticity, returns to state.
2. injection with low resistance according to claim 1, it is characterised in that：On the inner wall of the hollow cylinder (8)
Raised (9) with anticreep, back-off fixture block (6) is arranged in core bar head (5) in corresponding anticreep raised (9), core bar head (5) from below
Be inserted into the hollow cylinder (8) of connecting rod (4) and by be buckled to the cooperation of fixture block (6), anticreep raised (9) make core bar (2) with
Connecting rod (4) engages.
3. injection with low resistance according to claim 1 or 2, it is characterised in that：The back-off card on the core bar head (5)
The size of block (6) is more than the size of the anticreep raised (9) of connecting rod hollow cylinder (8).
4. injection with low resistance according to claim 1 or 2, it is characterised in that：The upper annular groove of the piston (3)
(10) notch longitudinal cross-section is V-shaped or inverted trapezoidal, and the notch longitudinal cross-section of lower annular groove (12) is in reverse V-shaped or trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510307057.0A CN104906667B (en) | 2015-06-05 | 2015-06-05 | Injection with low resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510307057.0A CN104906667B (en) | 2015-06-05 | 2015-06-05 | Injection with low resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104906667A CN104906667A (en) | 2015-09-16 |
| CN104906667B true CN104906667B (en) | 2018-10-19 |
Family
ID=54076365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510307057.0A Active CN104906667B (en) | 2015-06-05 | 2015-06-05 | Injection with low resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104906667B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397313A (en) * | 1994-01-27 | 1995-03-14 | The Kendall Company | Low friction syringe |
| CN2870870Y (en) * | 2005-09-09 | 2007-02-21 | 余利荣 | Low-resistance syringe |
| CN201022890Y (en) * | 2007-01-19 | 2008-02-20 | 江西洪达医疗器械集团有限公司 | Low-resistance syringe rubber plug |
| WO2009001600A1 (en) * | 2007-06-26 | 2008-12-31 | Terumo Kabushiki Kaisha | Medical container |
| CN201558383U (en) * | 2009-10-16 | 2010-08-25 | 黄文林 | Piston for low-resistance portable type injector |
| CN201735023U (en) * | 2010-07-19 | 2011-02-09 | 余利荣 | Novel low-resistance injector |
| CN101987219A (en) * | 2010-12-06 | 2011-03-23 | 李业中 | Rubber plug of low-resistance syringe |
| CN202620377U (en) * | 2012-05-25 | 2012-12-26 | 山东新华安得医疗用品有限公司 | Low-resistance injector |
| CN202982804U (en) * | 2012-12-28 | 2013-06-12 | 江西洪达医疗器械集团有限公司 | Low-resistance injector |
| CN204840538U (en) * | 2015-06-05 | 2015-12-09 | 山东新华安得医疗用品有限公司 | Injection with low resistance |
-
2015
- 2015-06-05 CN CN201510307057.0A patent/CN104906667B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104906667A (en) | 2015-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204840538U (en) | Injection with low resistance | |
| CN202761828U (en) | Novel low resistance injector | |
| CN208287304U (en) | A kind of low-residual syringe piston | |
| CN104906667B (en) | Injection with low resistance | |
| CN204352310U (en) | Without silicone oil syringe | |
| CN205055075U (en) | Low -resistance syringe | |
| CN202015392U (en) | Disposable syringe and core rod | |
| CN209154756U (en) | A kind of surgery syringe | |
| CN104906665A (en) | Low-resistance injector | |
| CN204446814U (en) | Single use injection with low resistance | |
| CN201370862Y (en) | Self-destroying vacuum safety syringe | |
| CN206443985U (en) | Medical syringe | |
| CN207323800U (en) | Double way injector syringe needle | |
| CN103656799A (en) | Prefilling injector | |
| CN202376562U (en) | Cylinder structure used for safe self-destruction type syringe | |
| CN211767512U (en) | Barreled water cover capable of being plugged back and water dispenser top penetrating core matched with barreled water cover | |
| CN203634583U (en) | Pre-filling injector | |
| CN209734661U (en) | Low-resistance syringe | |
| CN102813981A (en) | Barrel structure for safety auto-destruct syringe | |
| CN105521540B (en) | A kind of injection with low resistance | |
| CN111114999A (en) | Barreled water cover capable of being plugged back and water dispenser top penetrating core matched with barreled water cover | |
| CN208852158U (en) | Syringe | |
| CN205494565U (en) | Low remaining syringe that dispenses of liquid medicine | |
| CN201505343U (en) | rubber piston | |
| CN217793985U (en) | Injection assembly and injection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 255086 No. 999, Zunxian Road, high tech Zone, Zibo City, Shandong Province Patentee after: Shandong ande medical supplies Co.,Ltd. Address before: No.77, North Road, development zone, high tech Zone, Zibo City, Shandong Province Patentee before: SHINVA ANDE HEALTHCARE APPARATUS Co.,Ltd. |
|
| CP03 | Change of name, title or address |