CN211157344U - Syringe needle for dispensing - Google Patents
Syringe needle for dispensing Download PDFInfo
- Publication number
- CN211157344U CN211157344U CN201921035166.1U CN201921035166U CN211157344U CN 211157344 U CN211157344 U CN 211157344U CN 201921035166 U CN201921035166 U CN 201921035166U CN 211157344 U CN211157344 U CN 211157344U
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- CN
- China
- Prior art keywords
- needle
- hole
- liquid inlet
- liquid
- piston
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- 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.)
- Expired - Fee Related
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- 239000007788 liquid Substances 0.000 claims abstract description 74
- 239000003814 drug Substances 0.000 claims abstract description 40
- 229940079593 drug Drugs 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 9
- 238000002360 preparation method Methods 0.000 abstract description 4
- 238000009423 ventilation Methods 0.000 description 2
- 241001411320 Eriogonum inflatum Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002512 chemotherapy Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a syringe needle for dispensing, which comprises a needle body and a needle seat, wherein the needle point at the front end of the needle body is in a conical closed type, so that scraps are not easy to generate when a rubber plug of a medicine bottle is inserted; an air passage and a liquid passage are arranged in the needle tip, when the air pressure in the medicine bottle is increased, the internal air pressure is larger than the external atmospheric pressure, the internal air pressure pushes the piston to move upwards, the spring is stretched, the second inner hole is opened to exhaust, and after the air pressure is balanced, the piston is moved downwards under the action of the restoring force of the spring to seal the second inner hole; when the air pressure in the medicine bottle is reduced, the internal air pressure is smaller than the external atmospheric pressure, the external atmospheric pressure pushes the piston to move downwards, the spring is compressed, the second inner hole is opened for air inlet, and after the air pressure is balanced, the piston is pushed to move upwards under the action of the restoring force of the spring to seal the second inner hole; the air inlet and outlet mechanism can automatically adjust the air pressure in the medicine bottle, so that the injector can smoothly extract the liquid medicine, and the overflow of liquid and powder can be effectively avoided; the liquid inlets are symmetrically arranged on two sides of the needle body, the flow speed is high, and the liquid preparation speed is high.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, especially, relate to a dispense and use syringe needle.
Background
At present, the syringe needle used in clinical practice in hospitals is an inclined end face type needle point or a closed type needle, and the syringe needle for dispensing is mostly the needle of a 20ml syringe. Such syringe needles suffer from the following drawbacks: when the rubber stopper of the medicine bottle is punctured, the scraps are easy to enter the medicine bottle or the syringe and then enter the infusion bottle of a patient; when the powder medicine is obtained, normal saline needs to be filled into the powder, a large amount of gas can be generated after some powder medicines are dissolved, so that the air pressure in a medicine bottle is increased, the powder is easy to leak, and particularly, the liquid dispenser is injured to a certain extent when the chemotherapy medicines leak; when the liquid medicine is extracted, negative pressure is easily generated in the medicine bottle, so that the liquid medicine is difficult to extract; the inner diameter of the needle head is small, and the liquid preparation resistance is large.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a dispense and use syringe needle, the closed piece that does not produce of conical needle point can the automatically regulated medicine bottle internal gas pressure, and the extraction liquid medicine is smooth, can avoid the excessive of liquid and powder.
A syringe needle for dispensing comprises a needle body and a needle seat, wherein one end of the needle body is a closed conical needle point, the other end of the needle body is open, the needle body comprises an air passage and a liquid passage which are mutually independent, the liquid passage extends to the needle point, the air passage extends to a position which is a certain distance away from the needle point and is closed, two symmetrical liquid inlet holes are arranged on the needle body and close to the needle point, an air vent is arranged on the air passage and close to the needle point, a gas exchange cavity and a liquid inlet cavity are arranged on the needle seat, the gas exchange cavity is communicated with the air passage, the liquid inlet cavity is communicated with the liquid passage, and an air inlet and exhaust mechanism is arranged in the gas exchange cavity;
advance exhaust mechanism and include guide arm, piston and spring, the chamber of taking a breath is including the first hole, second hole and the third hole that connect gradually, first hole with the aperture of third hole is greater than the aperture of second hole, the one end of guide arm is fixed to be located the bottom surface in chamber of taking a breath, the other end of guide arm is equipped with the locating part, the piston cover is established on the guide arm, be equipped with on the guide arm the spring, the one end of spring with the bottom surface in chamber of taking a breath is connected, the other end of spring with the piston is connected, under the spring free state, the piston is located can seal in the second hole.
Above technical scheme is preferred, the feed liquor hole is the bell mouth, the main aspects in feed liquor hole outwards sets up.
Above technical scheme is preferred, the feed liquor hole slope sets up, the main aspects in feed liquor hole are close to the needle point, the tip is kept away from to the tip in feed liquor hole.
Above technical scheme is preferred, the inlet opening is apart from 2.5-3.5mm needle point front end, the vent hole is apart from 4-5mm needle point front end.
Preferably, the diameter of the large end of the liquid inlet hole is 1-1.2mm, the diameter of the small end of the liquid inlet hole is 0.6-0.8mm, and the diameter of the vent hole is 1-1.2 mm.
Above technical scheme is preferred, the periphery of piston is equipped with rubber seal.
According to the preferable technical scheme, the outer surface of the needle body is provided with a limiting convex point, and the distance between the limiting convex point and the front end of the needle point is 10-15 mm.
The utility model has the advantages and positive effects that: the utility model provides a syringe needle for dispensing, which comprises a needle body and a needle seat, wherein the needle point at the front end of the needle body is in a conical closed type, so that scraps are not easy to generate when a rubber plug of a medicine bottle is inserted; an air passage and a liquid passage are arranged in the needle tip, a gas exchange cavity and a liquid inlet cavity which are communicated with the needle seat are arranged in the needle seat, a gas inlet and exhaust mechanism is arranged in the gas exchange cavity, when the air pressure in the medicine bottle is increased, the internal air pressure is greater than the external atmospheric pressure, the piston is pushed to move upwards by the internal air pressure, the spring is stretched, the second inner hole is opened to exhaust, and after the air pressure is balanced, the piston is pulled to move downwards to seal the second inner hole under the action of the; when the air pressure in the medicine bottle is reduced, the internal air pressure is smaller than the external atmospheric pressure, the external atmospheric pressure pushes the piston to move downwards, the spring is compressed, the second inner hole is opened for air inlet, and after the air pressure is balanced, the piston is pushed to move upwards under the action of the restoring force of the spring to seal the second inner hole; the air inlet and outlet mechanism can automatically adjust the air pressure in the medicine bottle, so that the injector can smoothly extract the liquid medicine, and the overflow of liquid and powder can be effectively avoided; the liquid inlets are symmetrically arranged on two sides of the needle body, the flow speed is high, and the liquid preparation speed is high.
Drawings
Fig. 1 is a schematic structural view of a dispensing syringe needle according to an embodiment of the present invention;
FIG. 2 is an enlarged view at A of FIG. 1;
fig. 3 is an enlarged view at B of fig. 1.
Wherein: 1. a needle body; 2. a needle seat; 3. a needle tip; 4. an airway; 5. a liquid channel; 6. a liquid inlet hole; 7. a vent hole; 8. an air exchange cavity; 9. a liquid inlet cavity; 10. a guide bar; 11. a piston; 12. a spring; 13. a first inner bore; 14. a second inner bore; 15. a third inner bore; 16. a rubber seal ring; 17. a limiting member; 18. and limiting the salient points.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embodiment provides a syringe needle for dispensing, as shown in fig. 1-3, which comprises a needle body 1 and a needle seat 2, wherein one end of the needle body 1 is a closed conical needle point 3, the other end of the needle body 1 is open, the needle body 1 comprises an air passage 4 and a liquid passage 5 which are mutually independent, the liquid passage 5 extends to the needle point 3, the air passage 4 extends to a position which is closed at a certain distance from the needle point 3, two symmetrical liquid inlet holes 6 are arranged on the needle body 1 close to the needle point 3, an air vent 7 is arranged on the air passage 4 close to the needle point 3, a gas exchange cavity 8 and a liquid inlet cavity 9 are arranged on the needle seat 2, the gas exchange cavity 8 is communicated with the air passage 4, the liquid inlet cavity 9 is communicated with the liquid; the bottom surface of the air exchange cavity 8 is provided with a vent hole 7, the other end of the air passage 4 is provided with the vent hole 7, and the air passage 4 is communicated with the air exchange cavity 8 through the vent hole 7.
The air inlet and exhaust mechanism comprises a guide rod 10, a piston 11 and a spring 12, the air exchange cavity 8 comprises a first inner hole 13, a second inner hole 14 and a third inner hole 15 which are sequentially connected, the aperture of the first inner hole 13 and the aperture of the third inner hole 15 are larger than that of the second inner hole 14, one end of the guide rod 10 is fixedly arranged on the bottom surface of the air exchange cavity 8, and the other end of the guide rod 10 is provided with a limiting part 17 to prevent the piston 11 from moving upwards to separate from the guide rod 10. The piston 11 is sleeved on the guide rod 10, the spring 12 is arranged on the guide rod 10, one end of the spring 12 is connected with the bottom surface of the air exchange cavity 8, the other end of the spring 12 is connected with the piston 11, and the piston 11 is located in the second inner hole 14 to seal the second inner hole 14 when the spring 12 is in a free state. In order to ensure the sealing property of the connection between the piston 11 and the second inner hole 14, the outer periphery of the piston 11 is provided with a rubber seal ring 16.
In order to further improve the liquid inlet speed, the liquid inlet hole 6 is a conical hole, the large end of the liquid inlet hole 6 is arranged outwards, and the small end of the liquid inlet hole 6 is arranged inwards, so that the liquid inlet hole 6 forms a funnel shape. The flow direction of the liquid medicine is from the medicine bottle to the injector, in order to further improve the liquid inlet speed, the liquid inlet hole 6 is obliquely arranged, the large end of the liquid inlet hole 6 is close to the needle point 3, and the small end of the liquid inlet hole 6 is far away from the needle point 3, so that the funnel shape of the liquid inlet hole 6 is adapted to the flow direction of the liquid medicine.
The distance between the liquid inlet hole 6 and the front end of the needle tip 3 is 2.5-3.5mm, preferably 3mm in the embodiment; the vent hole 7 is 4-5mm away from the front end of the needle tip 3, and the preferred embodiment is 5 mm. The diameter of the large end of the liquid inlet hole 6 is 1-1.2mm, and the preferred diameter of the liquid inlet hole is 1 mm; the diameter of the small end is 0.6-0.8mm, and the diameter of the small end is preferably 0.6mm in the embodiment; the diameter of the vent hole 7 is 1-1.2mm, and the diameter of the vent hole is 1mm in the embodiment.
When the medicine liquid is extracted outwards, the medicine bottle is generally placed upside down, and when the needle extends into the medicine bottle too long, the needle needs to be pulled outwards for many times so as to extract the medicine as much as possible. In order to reduce the residue of the liquid medicine in the medicine bottle, the outer surface of the needle body 1 is provided with a hemispherical limit salient point 18, and the limit salient point 18 is 10-15mm away from the front end of the needle point 3, preferably 15mm in the embodiment. The arrangement of the limit salient points 18 ensures that the liquid inlet hole 6 and the vent hole 7 just penetrate through the bottle stopper and extend into the medicine bottle, thereby avoiding pulling out the needle head for multiple times and being beneficial to taking out the medicine as much as possible once.
The utility model provides a syringe needle for dispensing, which comprises a needle body 1 and a needle seat 2, wherein a needle point 3 at the front end of the needle body 1 is in a conical closed type, so that scraps are not easy to generate when a rubber plug of a medicine bottle is inserted; an air passage 4 and a liquid passage 5 are arranged in the needle tip 3, a ventilation cavity 8 and a liquid inlet cavity 9 which are communicated with the needle seat 2 are arranged in the needle seat 2, and an air inlet and exhaust mechanism is arranged in the ventilation cavity 8. In a free state of the spring 12, the piston 11 is positioned in the second inner hole 14 to seal the second inner hole 14, so that liquid medicine can be prevented from flowing out of the air passage 4; when the powder is dissolved to generate gas so as to increase the air pressure in the medicine bottle, the internal air pressure is greater than the external atmospheric pressure, the piston 11 is pushed to move upwards by the internal air pressure, the spring 12 is stretched to open the second inner hole 14 for exhausting, and after the air pressure is balanced, the piston 11 is pushed to move downwards under the action of the restoring force of the spring 12 to seal the second inner hole 14; when the air pressure in the medicine bottle for extracting the liquid medicine is reduced and negative pressure is generated, the internal air pressure is smaller than the external atmospheric pressure, the external atmospheric pressure pushes the piston 11 to move downwards, the spring 12 is compressed, the second inner hole 14 is opened for air inlet, and after the air pressure is balanced, the piston 11 is pushed to move upwards under the action of the restoring force of the spring 12 to seal the second inner hole 14; the air inlet and outlet mechanism can automatically adjust the air pressure in the medicine bottle, so that the injector can smoothly extract the liquid medicine, and the overflow of liquid and powder can be effectively avoided; the liquid inlets are symmetrically arranged at two sides of the needle body 1, the flow speed is high, and the liquid preparation speed is high.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (7)
1. A syringe needle for dispensing medicines comprises a needle body and a needle seat, and is characterized in that one end of the needle body is a closed conical needle point, the other end of the needle body is open, the needle body comprises an air passage and a liquid passage which are mutually independent, the liquid passage extends to the needle point, the air passage extends to a position which is a certain distance away from the needle point and is closed, two symmetrical liquid inlet holes are arranged on the needle body close to the needle point, an air vent is arranged on the air passage close to the needle point, a gas exchange cavity and a liquid inlet cavity are arranged on the needle seat, the gas exchange cavity is communicated with the air passage, the liquid inlet cavity is communicated with the liquid passage, and an air inlet and exhaust mechanism is arranged in the gas exchange cavity;
advance exhaust mechanism and include guide arm, piston and spring, the chamber of taking a breath is including the first hole, second hole and the third hole that connect gradually, first hole with the aperture of third hole is greater than the aperture of second hole, the one end of guide arm is fixed to be located the bottom surface in chamber of taking a breath, the other end of guide arm is equipped with the locating part, the piston cover is established on the guide arm, be equipped with on the guide arm the spring, the one end of spring with the bottom surface in chamber of taking a breath is connected, the other end of spring with the piston is connected, under the spring free state, the piston is located can seal in the second hole.
2. A dispensing syringe needle according to claim 1, wherein: the liquid inlet hole is a tapered hole, and the large end of the liquid inlet hole is arranged outwards.
3. A dispensing syringe needle according to claim 2, wherein: the liquid inlet hole is obliquely arranged, the large end of the liquid inlet hole is close to the needle point, and the small end of the liquid inlet hole is far away from the needle point.
4. A dispensing syringe needle according to claim 3, wherein: the distance between the liquid inlet hole and the front end of the needle tip is 2.5-3.5mm, and the distance between the vent hole and the front end of the needle tip is 4-5 mm.
5. A dispensing syringe needle according to claim 4, wherein: the diameter of the large end of the liquid inlet hole is 1-1.2mm, the diameter of the small end of the liquid inlet hole is 0.6-0.8mm, and the diameter of the vent hole is 1-1.2 mm.
6. A dispensing syringe needle according to claim 5, wherein: and a rubber sealing ring is arranged on the periphery of the piston.
7. A dispensing syringe needle according to claim 6, wherein: the outer surface of the needle body is provided with a limit salient point, and the distance between the limit salient point and the front end of the needle point is 10-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921035166.1U CN211157344U (en) | 2019-07-04 | 2019-07-04 | Syringe needle for dispensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921035166.1U CN211157344U (en) | 2019-07-04 | 2019-07-04 | Syringe needle for dispensing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211157344U true CN211157344U (en) | 2020-08-04 |
Family
ID=71814930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921035166.1U Expired - Fee Related CN211157344U (en) | 2019-07-04 | 2019-07-04 | Syringe needle for dispensing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211157344U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113288805A (en) * | 2021-05-19 | 2021-08-24 | 邵文龙 | Dispensing method for oncology department |
| CN113456489A (en) * | 2021-05-19 | 2021-10-01 | 邵文龙 | Dispensing equipment for oncology department |
-
2019
- 2019-07-04 CN CN201921035166.1U patent/CN211157344U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113288805A (en) * | 2021-05-19 | 2021-08-24 | 邵文龙 | Dispensing method for oncology department |
| CN113456489A (en) * | 2021-05-19 | 2021-10-01 | 邵文龙 | Dispensing equipment for oncology department |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200804 |