CN109350803A - A kind of injection with low resistance - Google Patents
A kind of injection with low resistance Download PDFInfo
- Publication number
- CN109350803A CN109350803A CN201811402980.2A CN201811402980A CN109350803A CN 109350803 A CN109350803 A CN 109350803A CN 201811402980 A CN201811402980 A CN 201811402980A CN 109350803 A CN109350803 A CN 109350803A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- diameter section
- rubber plug
- injection
- interference
- 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
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
- A61M5/31513—Piston constructions to improve sealing or sliding
Abstract
The invention discloses a kind of injection with low resistance, comprising: cylinder；Rubber plug is set in the cylinder to be contacted by flange collar thereon with the inner wall of the cylinder；Push rod, head are connected to rubber plug, for driving the rubber plug to slide along cylinder；Wherein: the inner barrel is divided into first diameter section and second diameter section, and the first diameter section is close to the head of the cylinder；The internal diameter of the first diameter section is greater than the internal diameter of the second diameter section, so that the magnitude of interference between the inner wall of the first diameter section of the flange collar and the cylinder is less than the magnitude of interference between the inner wall of second diameter section.The cylinder that the present invention passes through setting two-part, and then reduce the flange collar of the intracorporal rubber plug of cylinder and the pressure size of cylinder inboard wall interference fit, change the frictional force between rubber plug and cylinder, to adjust injection drag size, under the premise of not influencing sealing effect, achieve the effect that lower resistance.
Description
Technical field
The present invention relates to medical apparatus technical field more particularly to a kind of syringes.
Background technique
Well known, syringe includes cylinder, rubber plug and push rod, and rubber plug is set in cylinder and by convex on rubber plug
Circle is contacted with cylinder, and the head of push rod is connected to rubber plug, and push rod completes injection by push pull maneuver or draws the dynamic of medical fluid
Make.
In order to make rubber plug and cylinder inboard wall keep enough leakproofness, and meet the positive and negative pressure resistance achieved of related national standard
Difference injects the requirement of air tight liquid to meet, and the magnitude of interference cooperated between flange collar and cylinder is often bigger.Moreover, in order to right
Resist above-mentioned big magnitude of interference bring frictional resistance to increase, maintains good, qualified greasy property, some production firms are often
Increase the usage amount of silicone oil.But potential threaten can be generated to human health biocompatibility good silicone oil again.
It can be seen from the above, the magnitude of interference of simple reduction reduction flange collar and cylinder certainly will will affect product and use leakproofness.For
The leakproofness of rubber plug is maintained to reach qualified resistance to positive/negative pressure, and long-term (validity period of syringe is logical in order to overcome it
Often it is 5 years) storage causes the rubber plug aging of rubber material, elasticity to become smaller and lose the defect of sealing function, and conventional manufacturer is equal
The magnitude of interference of rubber plug can further be increased.
In fact, declining ready-made article out to safeguard rubber plug aging brought by long-term store so as to cause leakproofness
Can be unqualified, manufacturer is all in the magnitude of interference for passively increasing rubber plug.So final medical worker uses conventional syringe
When, it will certainly find that the resistance of promotion push rod is very big, feel is very heavy, be unfavorable for stability contorting injection rate, to aggravate to suffer from
Person's pain increases medical worker's labor intensity.
Summary of the invention
For the above-mentioned technical problems in the prior art, the present invention provides a kind of injection with low resistance.
In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that:
A kind of injection with low resistance, comprising:
Cylinder；
Rubber plug is set in the cylinder to be contacted by flange collar thereon with the inner wall of the cylinder；
Push rod, head are connected to rubber plug, for driving the rubber plug to slide along cylinder；Wherein:
The inner barrel is divided into first diameter section and second diameter section, and the first diameter section is close to the cylinder
Head；
The internal diameter of the first diameter section is greater than the internal diameter of the second diameter section, so that the flange collar and the cylinder
The magnitude of interference between the inner wall of the first diameter section be less than magnitude of interference between the inner wall of second diameter section.
Preferably, the internal diameter of the first diameter section is along axial identical.
Preferably, the internal diameter of the second diameter section is along axial identical.
Preferably, the head of the push rod is formed with boss, and card slot is formed on the rubber plug, and the boss is arranged in
The card slot is so that the push rod is connect with the rubber plug.
Compared with prior art, the beneficial effect of injection with low resistance provided by the present invention is: the present invention passes through setting
The cylinder of two-part, and then reduce the flange collar of the intracorporal rubber plug of cylinder and the pressure size of cylinder inboard wall interference fit, change rubber plug
Frictional force between cylinder under the premise of not influencing sealing effect, reaches lower resistance to adjust injection drag size
Effect.
Detailed description of the invention
Fig. 1 is the assembling structure schematic diagram for the syringe that the embodiment of the present invention provides.
Fig. 2 is the decomposition texture schematic diagram for the syringe that the embodiment of the present invention provides.
In figure:
10- cylinder；11- first diameter section；12- second diameter section；20- push rod；21- boss；30- rubber plug；31- flange collar；
32- card slot.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention with reference to the accompanying drawing and is embodied
Mode elaborates to the present invention.
As depicted in figs. 1 and 2, one embodiment of the present of invention provides a kind of injection with low resistance, which includes:
Cylinder 10, rubber plug 30 and push rod 20.Wherein, rubber plug 30 is set in cylinder 10, and the tail portion of rubber plug 30 has card slot 32；It pushes away
The head of bar 20 forms boss 21, which is arranged in card slot 32 to form connection status with rubber plug 30.Shape on rubber plug 30
At there is flange collar 31, which is contacted with the inner wall of cylinder 10 for realizing sealing.In the present invention, the inside of cylinder 10
It is divided into two sections, it may be assumed that first diameter section 11 and second diameter section 12, and the internal diameter of each position of first diameter section 11 is identical,
The internal diameter of each position in second diameter section 12 is identical, and the internal diameter of first diameter section 11 is greater than the interior of second diameter section 12
Diameter, in this way, the magnitude of interference between the flange collar 31 and first diameter section 11 of rubber plug 30 is less than the interference between second diameter section 12
Amount.Preferably, so that rubber plug 30 and the magnitude of interference of second diameter section 12 are arranged to the magnitude of interference of syringe in the prior art
20-80%, and make the axial dimension of first diameter section 11 slightly larger than the axial dimension of rubber plug 30.
A kind of injection with low resistance provided by the present invention actually makes cylinder 10 form two-part structure.Make rubber plug
When 30 factory state in the second diameter section 12 of cylinder 10.The advantage that cylinder 10 is arranged to two-part is: syringe
Finished product factory is until before use, rubber plug 30 is always positioned at the opposite maximum position of internal diameter, and rubber plug 30 and flange collar 31 are in phase at this time
To loose state, 10 inner wall of cylinder is minimum for the pressure of rubber plug 30, and the compressed shape variable of rubber plug 30 and flange collar 31 is most
It is small, ageing of rubber is avoided conducive to its long term storage, and maintain effective leakproofness.In this way, can enable to design magnitude of interference substantially
The 20%-80% of conventional value is narrowed down to, push rod 20 is connected rubber plug 30 in normal use and extracted together toward post-tensioning by medical worker
Medical fluid, since magnitude of interference very little is more conducive to medical worker and is absorbed in so that the feel of injection use process is very slim and graceful
Control injection rate.
The present invention reduces the flange collar 31 and cylinder of the rubber plug 30 in cylinder 10 by the way that the cylinder 10 of two-part is arranged
The pressure size of 10 inner walls interference fit, changes the frictional force between rubber plug 30 and cylinder 10, so that it is big to adjust injection resistance
It is small, under the premise of not influencing sealing effect, achieve the effect that lower resistance.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (4)
1. a kind of injection with low resistance characterized by comprising
Cylinder；
Rubber plug is set in the cylinder to be contacted by flange collar thereon with the inner wall of the cylinder；
Push rod, head are connected to rubber plug, for driving the rubber plug to slide along cylinder；Wherein:
The inner barrel is divided into first diameter section and second diameter section, and the first diameter section is close to the head of the cylinder；
The internal diameter of the first diameter section is greater than the internal diameter of the second diameter section, so that the flange collar and the cylinder are located at
Magnitude of interference between the inner wall of the first diameter section is less than the magnitude of interference between the inner wall of second diameter section.
2. a kind of injection with low resistance according to claim 1, which is characterized in that the internal diameter of the first diameter section is along axis
To identical.
3. a kind of injection with low resistance according to claim 1, which is characterized in that the internal diameter of the second diameter section is along axis
To identical.
4. a kind of injection with low resistance according to claim 1, which is characterized in that the head of the push rod is formed with convex
Platform is formed with card slot on the rubber plug, and the boss is arranged in the card slot so that the push rod is connect with the rubber plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811402980.2A CN109350803A (en) | 2018-11-23 | 2018-11-23 | A kind of injection with low resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811402980.2A CN109350803A (en) | 2018-11-23 | 2018-11-23 | A kind of injection with low resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109350803A true CN109350803A (en) | 2019-02-19 |
Family
ID=65338560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811402980.2A Pending CN109350803A (en) | 2018-11-23 | 2018-11-23 | A kind of injection with low resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109350803A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111888577A (en) * | 2020-08-06 | 2020-11-06 | 浙江环良医疗器械有限公司 | Medical syringe |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202497555U (en) * | 2012-02-21 | 2012-10-24 | 王建友 | Cylindrical shell |
| CN209437800U (en) * | 2018-11-23 | 2019-09-27 | 江苏康宝医疗器械有限公司 | A kind of injection with low resistance |
-
2018
- 2018-11-23 CN CN201811402980.2A patent/CN109350803A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202497555U (en) * | 2012-02-21 | 2012-10-24 | 王建友 | Cylindrical shell |
| CN209437800U (en) * | 2018-11-23 | 2019-09-27 | 江苏康宝医疗器械有限公司 | A kind of injection with low resistance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111888577A (en) * | 2020-08-06 | 2020-11-06 | 浙江环良医疗器械有限公司 | Medical syringe |
| CN111888577B (en) * | 2020-08-06 | 2021-03-16 | 浙江环良医疗器械有限公司 | Medical syringe |
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