CN106726564B - Medicine dissolving needle - Google Patents
Medicine dissolving needle Download PDFInfo
- Publication number
- CN106726564B CN106726564B CN201611256141.5A CN201611256141A CN106726564B CN 106726564 B CN106726564 B CN 106726564B CN 201611256141 A CN201611256141 A CN 201611256141A CN 106726564 B CN106726564 B CN 106726564B
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- Prior art keywords
- needle
- filtering membrane
- liquid medicine
- air
- air filtering
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2006—Piercing means
- A61J1/201—Piercing means having one piercing end
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2079—Filtering means
- A61J1/2082—Filtering means for gas filtration
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2079—Filtering means
- A61J1/2086—Filtering means for fluid filtration
Abstract
The application discloses a medicine dissolving needle, an air filtering membrane of which is reliably and safely arranged in the medicine dissolving needle, and the medicine dissolving needle is easy to assemble and high in qualification rate. The utility model provides a medicine dissolving needle, includes the cover on be equipped with the chamber of receiving on the cover, needle file subassembly inserts the chamber of receiving and forms fixedly with last cover, and the needle tubing of needle file subassembly exposes in the cover, has the clearance between needle file subassembly and the inner wall of receiving the chamber and forms the air flue, and the air flue is linked together with the venthole of setting up on last cover, needle file subassembly is formed with the liquid medicine passageway, it has the reducing portion perpendicular to liquid medicine passageway axis to go up the cover, is equipped with first hole on the reducing portion, is fixed with air filtering membrane on the reducing portion, air filtering membrane covers first hole, and air can get into the air flue through first hole and air filtering membrane.
Description
Technical Field
The application belongs to the technical field of medical instruments for dispensing medicines, and particularly relates to a medicine dissolving needle.
Background
The drug dissolving needle, also called a drug adder, is used as a medical instrument for dispensing and is matched with a needle cylinder of a syringe needle during the dispensing operation. When the drug dissolving needle of the present application is used for dispensing drugs, it is unnecessary to inject air into a drug solution container such as an infusion bag (bottle) in advance, and the drug solution can be directly extracted when the drug dissolving needle is inserted into the drug solution container. While drawing the medicine liquid, air enters the medicine liquid dissolver through the medicine dissolving needle to balance the pressure in the medicine liquid dissolver.
At present, the Chinese patent application with publication number of CN101229400A discloses a medicine feeder, which comprises a needle seat, a sleeve and a needle head fixed on the needle seat, wherein a liquid through hole is formed in the needle head, the sleeve is fixed on the needle seat, the needle head is positioned in the sleeve and has a certain gap with the sleeve, a vent is arranged at the side part of the sleeve, an air filtering membrane plug is arranged in the vent, and a clamping structure I which enables the sleeve and the needle seat to be fixedly connected and enables the sleeve and the needle seat to form a seal is arranged between the sleeve and the needle seat.
However, in the drug-dissolving needle of this structure, the vent is provided in the side portion of the sleeve (upper cover), the axis of the vent is perpendicular to the axis of the liquid-passing hole, and the air filtering membrane is attached to the side portion, so that the attachment axis of the air filtering membrane is also perpendicular to the axis of the liquid-passing hole. It can be understood that, because the air filtering membrane is installed laterally, the design space allowance for installing the air filtering membrane on the sleeve is smaller, in order to expand the installation space of the air filtering membrane, the means adopted in the above patent document is to thicken the local pipe wall of the sleeve, if the thickening is excessive, the product is seriously affected in appearance, and therefore, the space expansion is limited. Even the design space for installing the air filtering membrane after expansion is smaller, the whole diameter of the air filtering membrane is smaller, and the installation is inconvenient. In the installation process, the air filtering membrane is often placed into the air vent at an inclined angle, but cannot cover the air vent comprehensively, so that the low product yield is caused.
Disclosure of Invention
An object of the present application is to provide a drug-dissolving needle in which an air filtration membrane is reliably secured, and which is easy to assemble and high in yield.
Another object of the present application is to provide a drug-dissolving needle which is simple in assembly process.
Another object of the present application is to provide a drug dissolving needle which can filter the drug solution to ensure the safety of drug administration.
In order to solve the technical problems, the aim of the application is realized as follows:
the utility model provides a medicine dissolving needle, includes the cover on be equipped with the chamber of receiving on the cover, needle file subassembly inserts the chamber of receiving and forms fixedly with last cover, and the needle tubing of needle file subassembly exposes in the cover, has the clearance between needle file subassembly and the inner wall of receiving the chamber and forms the air flue, and the air flue is linked together with the venthole of setting up on last cover, needle file subassembly is formed with the liquid medicine passageway, it has the reducing portion perpendicular to liquid medicine passageway axis to go up the cover, is equipped with first hole on the reducing portion, is fixed with air filtering membrane on the reducing portion, air filtering membrane covers first hole, and air can get into the air flue through first hole and air filtering membrane.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the air filtering membrane is positioned in the receiving cavity and is attached to the inner surface of the reducing part.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the reducing part is in an annular structure and surrounds the periphery of the axis of the liquid medicine channel, the air filtering membrane is annular, and the needle seat component passes through the air filtering membrane.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: and a gland is sleeved in the receiving cavity and connected with the upper sleeve, a second hole is formed in the gland, the first hole is communicated with the air passage through the second hole, and the gland presses the air filtering membrane on the inner surface of the reducing part.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the reducing part is provided with a concave cavity, the gland is provided with a boss, the boss is embedded into the concave cavity, and the boss and the concave cavity form interference fit.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the periphery edge of the gland is provided with a convex edge which forms clearance fit with the inner wall of the receiving cavity.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the needle seat assembly comprises a needle tube, a needle seat and a joint, wherein the needle tube is fixedly connected with the needle seat, the joint is connected with the needle seat, and the needle seat and the joint are formed in a split mode.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the needle seat comprises a base, the base is used for being connected with the connector, the base and the inner wall of the receiving cavity form clearance fit, a waist is arranged at one end, adjacent to the needle tube, of the base, the outer diameter of the waist is smaller than that of the base, the waist is inserted into the gland, and the outer wall of the waist and the inner wall of the protruding edge form interference fit.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: : the needle seat component also comprises a liquid medicine filtering membrane blocked in the liquid medicine channel, a supporting part which is continuously distributed along the circumferential direction of the liquid medicine channel is arranged in the needle seat, a raised ring is arranged on the joint and is inserted into the needle seat, and the raised ring presses the circumferential edge of the liquid medicine filtering membrane on the supporting part of the needle seat.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the air filtering membrane is arranged on the outer side of the upper sleeve.
Compared with the prior art, the application has the following outstanding and beneficial technical effects:
the medicine dissolving needle adopts the structure of the reducing part, and the reducing part can form an annular structure, so that the obtained area is relatively large, the design space for installing the air filtering membrane is rich, and the air filtering membrane with large surface area can be installed. It will be appreciated that the variable diameter portion is relatively large with the air filtration membrane and that the assembly operation is easier. Furthermore, because the reducing part is relatively large, the residual area for the air filtering membrane to contact and fix is relatively large, so that the air filtering membrane can be reliably fixed on the upper sleeve.
Drawings
Fig. 1 is a schematic view of the overall structure of the present application.
Fig. 2 is a schematic diagram of the explosive structure of the present application.
Fig. 3 is a schematic cross-sectional view of the present application.
Fig. 4 is a schematic structural view of the gland of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, based on the examples given, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the application.
In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, the terms "first," "second," and the like 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.
In the description of the present application, the terms "fixed," "fixedly connected," "connected," and the like are to be construed broadly and may or may not be integrally formed as a detachable connection, and specifically may refer to an interference fit, a snap fit, a screw connection, a welded, an adhesive, an integrally formed structure, or the like.
In the description of the application, the first feature is in a connective, assembled relationship with the second feature, and should be understood in a broad sense, as the first feature may be in direct contact with the second feature, or may be in indirect contact with the third feature.
The disclosed medicine dissolving needle is used as a medical instrument for dispensing, and is matched with a needle cylinder of an injector needle for use in the dispensing operation. When the drug dissolving needle of the present application is used for dispensing drugs, it is unnecessary to inject air into a drug solution container such as an infusion bag (bottle) in advance, and the drug solution can be directly extracted when the drug dissolving needle is inserted into the drug solution container. While drawing the medicine liquid, air enters the medicine liquid dissolver through the medicine dissolving needle to balance the pressure in the medicine liquid dissolver.
Generally, an air filtering membrane is arranged on the medicine dissolving needle to filter out particulate matters in the air, so that clean air is obtained to enter the medicine liquid container to ensure the medicine administration safety.
The application discloses a medicine dissolving needle, which improves the mounting structure of an air filtering membrane of the traditional medicine dissolving needle, so that the air filtering membrane is reliably and safely arranged in the medicine dissolving needle, and the medicine dissolving needle is easy to assemble and high in qualification rate.
The medicine dissolving needle of the application comprises an upper sleeve 1, an air filtering membrane 2 and a needle seat assembly 3. Wherein the air filter membrane 2 and the needle hub assembly 3 are mounted in the upper housing 1.
In one embodiment, as shown in fig. 2, hub assembly 3 includes a needle cannula 31, a hub 32, and a hub 33. One end of the needle tube 31 is fixedly connected with one end of the needle seat 32, and the other end of the needle seat 32 is fixedly provided with a joint 33. The connector 33 is formed separately from the hub 32.
Wherein, as shown in fig. 3, the adapter includes a syringe connection 311 and a raised ring 312. The syringe connecting section 311 is for connection with a syringe. The syringe connecting portion 311 has a columnar structure, and the syringe connecting portion 311 is provided with a first liquid medicine channel 310 along the axial direction for inserting the front end of the syringe. To facilitate connection and ensure reliable connection, the first medical fluid passage 310 has a taper with an inner diameter gradually increasing from inside to outside. Screw teeth 313 are provided on the outer side of the cylinder connecting part 311, which can be connected with a cylinder having a screw. The protruding ring 312 has a barrel-shaped structure, one end of the protruding ring 312 is connected to the syringe connecting portion 311, and the other end of the protruding ring 312 is connected to the needle holder 32.
As shown in fig. 3, the needle holder 32 includes a base 321, the base 321 being for connection with the adapter 33, specifically, the base 321 being connected with the raised ring 312 on the adapter 33, the base 321 having a second medical fluid channel 320, the raised ring 312 being inserted into the second medical fluid channel 320, the raised ring 312 forming an interference fit with a sidewall 3201 of the second medical fluid channel 320 to secure the adapter 33 with the needle holder 32. The front end of the base 321 is relatively thin and is adapted to be coupled to one end of the needle cannula 31. After the adapter 33, the needle holder 32, and the needle tube 31 are assembled, the first medical fluid passage 310, the second medical fluid passage 320, and the needle tube 31 communicate to form the medical fluid passage 200 for delivering medical fluid.
In a specific application, the connector 33 is provided with the screw tooth 313, so that the medicine dissolving needle can be screwed on the syringe through a screw thread structure, and the medicine dissolving needle and the syringe can be firmly connected together.
Preferably, the needle seat assembly may also be provided with a drug solution filtering membrane 34, wherein the drug solution filtering membrane 34 can filter out insoluble particles with a certain particle size or above in the drug solution, so as to prevent the insoluble particles from entering the drug solution dissolver, thereby ensuring the drug administration safety. In one embodiment, as shown in fig. 4, the medical fluid filtering membrane 34 is blocked in the medical fluid passage 200, whereby the medical fluid is filtered by the medical fluid filtering membrane 34 and then transferred to the medical fluid container. Specifically, when the raised ring 312 on the connector 33 is inserted into the needle holder 32 while the peripheral edge of the bottom 322 of the needle holder 32 is attached to the peripheral edge of the liquid medicine filtering membrane 34, the raised ring 312 presses the peripheral edge of the liquid medicine filtering membrane 34 against the bottom 322 of the needle holder 32, so that the liquid medicine filtering membrane 34 is fixed in the liquid medicine passage. In the present embodiment, the bottom of the needle holder 32 serves as a support for the drug solution filtering membrane 34, but other structures, such as a convex ring formed at the middle portion for mounting the drug solution filtering membrane 34, may be employed.
With the needle seat assembly with such a structure, since the liquid medicine filtering membrane 34 is fixed by the cooperation of the raised ring 312 on the connector 33 and the bottom 322 of the needle seat 32, the fixation of the liquid medicine filtering membrane 34 can be obtained when the connector 33 is assembled, and the assembling process is simple.
A rib 323 is provided on the bottom of the needle holder 32, the rib 323 extends along the radial direction of the bottom of the needle holder 32 and protrudes from the surface 32a of the bottom of the needle holder 32, and the rib 323 is abutted against the liquid medicine filtering membrane 34.
In the process of delivering the liquid medicine to the liquid medicine container, under the action of pressure, the liquid medicine filtering membrane 34 deforms towards the bottom 322 direction of the needle seat, and the liquid medicine filtering membrane 34 is supported by the convex edges 323, so that the integrity of the liquid medicine filtering membrane 34 is prevented from being contacted with the bottom of the needle seat 32, a space is always reserved between the liquid medicine filtering membrane 34 and the bottom of the needle seat 32, and therefore the area on the liquid medicine filtering membrane 34 for the liquid medicine to pass through is not reduced, and the filtering speed is ensured.
Referring to fig. 2, a receiving cavity 10 is provided in the upper housing 1, and a needle hub assembly 3 is inserted into the receiving cavity 10 and fixedly coupled to the upper housing 1 with a needle cannula 31 of the needle hub assembly exposed from the upper housing.
Referring to fig. 3, there is a gap between the needle hub assembly 3 and the inner wall 101 of the receiving chamber 10 to form an air passageway 100, the air passageway 100 being in communication with an air outlet aperture 11 provided in the upper housing 1. As shown in the figure, the air outlet hole 11 is formed at the front end 1a of the upper sleeve 1, and the air outlet hole 11 is a wall 12 penetrating through the upper sleeve 1. The air passage is communicated with the outside through the air outlet hole.
In a specific application, the front end 1a of the upper sleeve is inserted into the liquid medicine container, and the air channel 100 is communicated with the liquid medicine container through the air outlet 11, so that air can be conveyed into the liquid medicine container.
The upper jacket 1 has a diameter-reducing portion 13 perpendicular to the axis of the liquid medicine passage, and in one embodiment, a diameter-reducing structure is formed on the inner wall 101 of the receiving chamber 10. As shown in fig. 4, the upper sleeve has two adjacent sections, wherein the inner diameter of the front section is smaller than that of the rear section, and the joined portions of the front section and the rear section form the variable diameter portion 13. In this way, the air filter membrane is secured within the receiving chamber 10.
The reducing part 13 is provided with a first hole 5, the reducing part 13 is fixedly provided with an air filtering membrane 2, the air filtering membrane 2 is attached to the inner surface of the reducing part 13, the air filtering membrane 2 covers the first hole 5, and air can enter the air passage 100 through the first hole 5 and the air filtering membrane 2. In one embodiment, the first holes may be provided in one or more, as shown in fig. 1, along the circumferential direction of the receiving cavity.
The diameter-variable portion 13 can be formed in an annular structure, so that the available area is relatively large, and the design space for installing the air filtration membrane 2 is rich, and the air filtration membrane with a large surface area can be installed. It will be appreciated that the reducing portion 13 is relatively large with the air filtration membrane 2 and that the assembly operation is easier. Furthermore, since the diameter-changing portion 13 is relatively large, the remaining area for the air filtering membrane 2 to be fixed in contact is relatively large, so that the air filtering membrane can be reliably fixed to the upper cover.
In one embodiment, the reducing part 13 is in an annular structure surrounding the circumference of the axis of the liquid medicine channel, that is, the central axis of the reducing part 13 is coaxial with the central axis of the receiving cavity 10, the air filtering membrane 2 is annular, and the needle seat assembly 3 passes through the air filtering membrane 2. The annular structure may be a circular ring, a square frame, or other shapes.
When the air filtering membrane is specifically applied, the diameter circumference of the diameter-changing part 13 and the air filtering membrane 2 are integrally formed into an annular structure, so that the diameter circumference of the air filtering membrane is large relative to that of the existing air filtering membrane mounting part, the air filtering membrane is greatly convenient to assemble, and the processing qualification rate is improved. The air filtration membrane may not have a closed loop structure.
In one embodiment, as shown in the figure, a gland 4 is further sleeved in the receiving cavity 10, a second hole 41 is arranged on the gland 4, the first hole 5 is communicated with the air passage 100 through the second hole 41, and the gland 4 is used for attaching the air filtering membrane 2 to the inner surface of the reducing portion 13.
In this embodiment, the gland 4 is fixedly connected to the upper sleeve 1. As shown in the figure, a concave cavity 14 is provided in the diameter-variable portion 13, a boss 42 is provided on the gland 4, the boss 42 is embedded in the concave cavity 14, and the boss 42 forms an interference fit with the concave cavity 14.
Therefore, the boss is not contacted with the upper sleeve in the gland loading process, so that the gland can be conveniently pushed to the reducing part.
In one embodiment, a ledge 43 is provided on the outer circumferential edge of the gland 4, and in one embodiment, the ledge 43 is in a circular configuration, the ledge 43 forming a clearance fit with the inner wall 101 of the receiving chamber 10.
The structure of the convex edge 43 can lead the gland 4 to play a role of guiding and positioning in the pushing process.
To facilitate assembly of the needle hub assembly into the upper hub, in this embodiment, the base 321 forms a clearance fit with the inner wall 101 of the receiving cavity 10, a waist 324 is provided on the end of the base 321 adjacent the needle cannula 31, the outer diameter of the waist 324 is smaller than the outer diameter of the base 321, the waist 324 is inserted into the gland 4, and the outer wall of the waist 324 forms an interference fit with the inner wall of the flange 43. Thus, the hub 32 is fixedly connected by the gland, which is fixed to the upper hub, whereby the hub 32 is also fixedly connected to the upper hub.
Example two
The medicine dissolving needle provided in this embodiment has substantially the same structure as the medicine dissolving needle disclosed in the first embodiment, and the difference between them is that: the air filtering membrane of the first embodiment is disposed in the receiving cavity, while the air filtering membrane of the drug dissolving needle of the first embodiment is disposed outside the receiving cavity, specifically, a reducing structure is formed on the outer wall of the upper sleeve, and the upper sleeve has two adjacent sections, wherein the outer diameter of the front section is smaller than the inner diameter of the outer section, and the joined part of the front section and the rear section forms a reducing part. The air filter cavity can be pressed on the reducing part by the outer gland.
The above embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. The utility model provides a medicine dissolving needle, includes the cover on the cover be equipped with the chamber of receiving, the needle file subassembly inserts the chamber of receiving and forms fixedly with last cover, the needle tubing of needle file subassembly exposes in the cover, has the clearance between the inner wall in needle file subassembly and chamber of receiving and forms the air flue, and the air flue is linked together with the venthole of setting up on last cover, the needle file subassembly is formed with liquid medicine passageway, its characterized in that: the upper sleeve is provided with a variable diameter part perpendicular to the axis of the liquid medicine channel, a first hole is formed in the variable diameter part, an air filtering membrane is fixed on the variable diameter part, the air filtering membrane covers the first hole, and air can enter the air channel through the first hole and the air filtering membrane;
the needle seat assembly comprises a needle tube, a needle seat and a joint, wherein the needle tube is fixedly connected with the needle seat, the joint is connected with the needle seat, and the needle seat and the joint are formed in a split mode;
the connector comprises a needle cylinder connecting part and a bulge loop, wherein the needle cylinder connecting part is in a columnar structure, a first liquid medicine channel is formed in the needle cylinder connecting part along the axial direction, and screw teeth are arranged on the outer side surface of the needle cylinder connecting part and can be connected with a needle cylinder with a screw port; the protruding ring is in a barrel-shaped structure, one end of the protruding ring is connected with the needle cylinder connecting part, and the other end of the protruding ring is connected with the needle seat;
the needle seat comprises a base, the base is connected with a convex ring on the connector, the base is provided with a second liquid medicine channel, the convex ring is inserted into the second liquid medicine channel, and the convex ring and the side wall of the second liquid medicine channel form interference fit so that the connector is fixed with the needle seat; after the connector, the needle seat and the needle tube are assembled, the first liquid medicine channel, the second liquid medicine channel and the needle tube are communicated to form a liquid medicine channel for conveying liquid medicine;
the needle seat assembly also comprises a liquid medicine filtering membrane blocked in the liquid medicine channel, a supporting part which is continuously distributed along the circumferential direction of the liquid medicine channel is arranged in the needle seat, a raised ring is arranged on the joint and is inserted into the needle seat, and the raised ring presses the circumferential edge of the liquid medicine filtering membrane on the supporting part of the needle seat;
and a gland is sleeved in the receiving cavity and connected with the upper sleeve, a second hole is formed in the gland, the first hole is communicated with the air passage through the second hole, and the gland presses the air filtering membrane on the inner surface of the reducing part.
2. The dissolving needle according to claim 1, characterized in that: the air filtering membrane is positioned in the receiving cavity and is attached to the inner surface of the reducing part.
3. A dissolving needle according to claim 1 or 2, characterized in that: the reducing part is in an annular structure and surrounds the periphery of the axis of the liquid medicine channel, the air filtering membrane is annular, and the needle seat component passes through the air filtering membrane.
4. The dissolving needle according to claim 1, characterized in that: the reducing part is provided with a concave cavity, the gland is provided with a boss, the boss is embedded into the concave cavity, and the boss and the concave cavity form interference fit.
5. The dissolving needle according to claim 1 or 4, characterized in that: the periphery edge of the gland is provided with a convex edge which forms clearance fit with the inner wall of the receiving cavity.
6. The dissolving needle according to claim 1, characterized in that: the needle seat comprises a base, the base is used for being connected with the connector, the base and the inner wall of the receiving cavity form clearance fit, a waist is arranged at one end, adjacent to the needle tube, of the base, the outer diameter of the waist is smaller than that of the base, the waist is inserted into the gland, and the outer wall of the waist and the inner wall of the protruding edge form interference fit.
7. The dissolving needle according to claim 1, characterized in that: the air filtering membrane is arranged on the outer side of the upper sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611256141.5A CN106726564B (en) | 2016-12-30 | 2016-12-30 | Medicine dissolving needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611256141.5A CN106726564B (en) | 2016-12-30 | 2016-12-30 | Medicine dissolving needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106726564A CN106726564A (en) | 2017-05-31 |
| CN106726564B true CN106726564B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611256141.5A Active CN106726564B (en) | 2016-12-30 | 2016-12-30 | Medicine dissolving needle |
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