CN209437800U - A kind of injection with low resistance - Google Patents
A kind of injection with low resistance Download PDFInfo
- Publication number
- CN209437800U CN209437800U CN201821938997.5U CN201821938997U CN209437800U CN 209437800 U CN209437800 U CN 209437800U CN 201821938997 U CN201821938997 U CN 201821938997U CN 209437800 U CN209437800 U CN 209437800U
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- cylinder
- diameter section
- rubber plug
- injection
- wall
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Abstract
The utility model 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 utility model 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 utility model 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 the flange collar on rubber plug
It is contacted with cylinder, the head of push rod is connected to rubber plug, and push rod completes injection by push pull maneuver or draws the movement of medical fluid.
In order to make rubber plug and cylinder inboard wall keep enough leakproofness, and meet related national standard positive and negative resistance to pressure difference achieved
To meet the requirement for injecting air tight liquid, the magnitude of interference cooperated between flange collar and cylinder is often bigger.Moreover, in order to fight
It states big magnitude of interference bring frictional resistance to increase, maintains good, qualified greasy property, some production firms often will increase silicon
The usage amount of 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 using conventional syringe when
It waits, will certainly find that the resistance of promotion push rod is very big, feel is very heavy, be unfavorable for stability contorting injection rate, thus making patients
Pain increases medical worker's labor intensity.
Utility model content
For the above-mentioned technical problems in the prior art, the utility model provides a kind of injection with low resistance.
In order to solve the above technical problems, the embodiments 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, head of the first diameter section close to the cylinder
Portion；
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
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.
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 institute
Card slot is stated 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 utility model is: the utility model
By the way that the cylinder of two-part is arranged, and then reduce the flange collar of the intracorporal rubber plug of cylinder and the pressure size of cylinder inboard wall interference fit,
The frictional force changed between rubber plug and cylinder under the premise of not influencing sealing effect, reaches to adjust injection drag size
The effect of lower resistance.
Detailed description of the invention
Fig. 1 is the assembling structure schematic diagram for the syringe that the embodiments of the present invention provide.
Fig. 2 is the decomposition texture schematic diagram for the syringe that the embodiments of the present invention provide.
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
It is with reference to the accompanying drawing and specific real to make those skilled in the art better understand the technical solution of the utility model
Mode is applied to elaborate to the utility model.
As depicted in figs. 1 and 2, one embodiment of the utility model provides a kind of injection with low resistance, the syringe packet
It 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；
The head of push rod 20 forms boss 21, which is arranged in card slot 32 to form connection status with rubber plug 30.On rubber plug 30
It is formed with flange collar 31, which contacts with the inner wall of cylinder 10 for realizing sealing.In the present invention, cylinder 10
Inside be divided into two sections, it may be assumed that first diameter section 11 and second diameter section 12, and the internal diameter phase of each position of first diameter section 11
Together, 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 second diameter section 12
Internal 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 mistake between second diameter section 12
The amount of being full of.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 first diameter section 11 axial dimension be slightly larger than rubber plug 30 axial dimension.
A kind of injection with low resistance provided by the utility model actually makes cylinder 10 form two-part structure.Make
When 30 factory state of rubber plug in the second diameter section 12 of cylinder 10.The advantage that cylinder 10 is arranged to two-part is: note
The factory of emitter finished product is until before use, rubber plug 30 is always positioned at the opposite maximum position of internal diameter, at this time at rubber plug 30 and flange collar 31
In the state of relative relaxation, 10 inner wall of cylinder is minimum for the pressure of rubber plug 30, the compressed shape variable of rubber plug 30 and flange collar 31
Minimum avoids ageing of rubber conducive to its long term storage, and maintains effective leakproofness.In this way, design magnitude of interference can be enable big
Width narrows down to the 20%-80% of conventional value, and push rod 20 is connected rubber plug 30 in normal use and taken out together toward post-tensioning by medical worker
Taking liquid, 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 utility model 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 wall of body 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 the exemplary embodiment of the utility model, are not used in limitation the utility model, this is practical new
The protection scope of type is defined by the claims.Those skilled in the art can be in the essence and protection scope of the utility model
It is interior, various modifications or equivalent replacements are made to the utility model, this modification or equivalent replacement also should be regarded as falling in originally practical new
In the protection scope of type.
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 |
|---|---|---|---|
| CN201821938997.5U CN209437800U (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 |
|---|---|---|---|
| CN201821938997.5U CN209437800U (en) | 2018-11-23 | 2018-11-23 | A kind of injection with low resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209437800U true CN209437800U (en) | 2019-09-27 |
Family
ID=68012654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821938997.5U Active CN209437800U (en) | 2018-11-23 | 2018-11-23 | A kind of injection with low resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209437800U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109350803A (en) * | 2018-11-23 | 2019-02-19 | 江苏康宝医疗器械有限公司 | A kind of injection with low resistance |
-
2018
- 2018-11-23 CN CN201821938997.5U patent/CN209437800U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109350803A (en) * | 2018-11-23 | 2019-02-19 | 江苏康宝医疗器械有限公司 | A kind of injection with low resistance |
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