CN217793985U - Injection assembly and injection device - Google Patents
Injection assembly and injection device Download PDFInfo
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- CN217793985U CN217793985U CN202220212845.7U CN202220212845U CN217793985U CN 217793985 U CN217793985 U CN 217793985U CN 202220212845 U CN202220212845 U CN 202220212845U CN 217793985 U CN217793985 U CN 217793985U
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- needle
- injection
- injection assembly
- boss
- outer sleeve
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Abstract
The utility model discloses an injection subassembly and injection apparatus. The injection assembly comprises: the outer sleeve is provided with a connecting end for connecting the needle heads, and the connecting end is provided with an external thread matched with the first needle head and an internal thread matched with the second needle head; and the core bar is arranged in the outer sleeve in a sliding manner, and one end of the core bar is provided with a rubber plug. The injection device comprises: an injection assembly; and a first needle comprising a hub and a steel needle secured to the hub, the hub having an inner surface and a contact boss projecting from the inner surface for contacting the connecting end of the outer sleeve of the injection assembly. According to the utility model discloses an injection subassembly can conveniently simply connect the internal thread syringe needle and realize the liquid medicine injection.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to an injection subassembly and including injection device of this injection subassembly.
Background
When the powder preparation is clinically used, a syringe is connected with a conventional needle, specific liquid is extracted to serve as diluent, the diluent is injected into a bottle filled with the powder preparation to be dissolved, the prepared solvent is sucked into the syringe, the conventional needle is taken down from the syringe, the syringe is connected with an injection needle to complete injection, and the injection needle is an internal thread needle.
In conventional syringes, the outer surface of the outer sleeve has no external thread and cannot be connected to an internally threaded needle. If the traditional syringe is used and the needle stand of the internal thread needle is reluctantly connected, because the inside of the internal thread needle is provided with the steel needle, and the head end of the rubber plug in the syringe is longer, the steel needle of the internal thread needle can pierce the rubber plug of the syringe, so that the rubber plug can not be pushed to the bottom, a larger residual space is caused, and the liquid medicine in the partial space is wasted.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem existing in the prior art, the embodiment of the utility model provides an injection subassembly and including this injection assembly's injection device, it can connect the internal thread syringe needle and inject.
According to one aspect of the present invention, an injection assembly is provided. The injection assembly comprises: the outer sleeve is provided with a connecting end for connecting the needle heads, and the connecting end is provided with an external thread matched with the first needle head and an internal thread matched with the second needle head; and the core bar is arranged in the outer sleeve in a sliding manner, and one end of the core bar is provided with a rubber plug.
Optionally, the end of the plug is planar.
Optionally, the end of the plug is extended to form a hollow cylindrical plunger for receiving the steel needle of the first needle.
Optionally, a hollow frusto-conical boss is provided in the connecting end of the outer sleeve.
Optionally, the boss has a contact surface for contacting a hub of the first needle.
Optionally, the boss has a first contact protrusion protruding from the contact surface.
Optionally, the boss has a first contact recess recessed in the contact surface.
Optionally, the boss has a second contact protrusion protruding from the first contact recess.
According to another aspect of the present invention, an injection device is provided. The injection device comprises: an injection assembly; and a first needle comprising a hub and a steel needle secured to the hub, the hub having an inner surface and a contact boss projecting from the inner surface for contacting the connecting end of the outer sleeve of the injection assembly.
Optionally, the steel needle has a needle tip at both ends.
Compared with the prior art, the technical scheme of the embodiment of the utility model has following advantage:
according to an embodiment of the utility model, this injection assembly's outer sleeve has the link that is used for connecting the needle file, and the link is equipped with first syringe needle matched with external screw thread and with second syringe needle matched with internal thread. Through set up the external screw thread at this injection subassembly's outer sleeve, this injection subassembly can connect first needle, for example the internal thread needle carries out the liquid medicine injection.
Drawings
Other features and advantages of the present invention will be better understood from the following detailed description of alternative embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts, and in which:
fig. 1 shows a schematic structural view of an injection assembly of an injection device according to an embodiment of the present invention;
figure 2 shows a cross-sectional view of an injection assembly of an injection device according to an embodiment of the present invention;
FIG. 3 shows a schematic structural view of the coupling end of the outer sleeve of the injection assembly of FIG. 1;
fig. 4 shows a cross-sectional view of a first needle of an injection device according to an embodiment of the invention;
figure 5 illustrates a perspective view of a plug of an injection assembly according to one embodiment of the present invention;
figure 6 illustrates a schematic view of the installation of the plug and the first needle of the injection assembly according to one embodiment of the present invention;
figure 7 shows a perspective view of a plug of an injection assembly according to another embodiment of the present invention;
figure 8 shows a schematic view of the installation of the plug and the first needle of the injection assembly according to another embodiment of the present invention;
figures 9a, 9b and 9c show schematic structural views of the connecting end of the outer sleeve of the injection assembly according to the first embodiment of the present invention;
figures 10a, 10b and 10c show schematic structural views of a connecting end of an outer sleeve of a syringe assembly according to a second embodiment of the present invention;
figures 11a, 11b and 11c show schematic structural views of a connecting end of an outer sleeve of a syringe assembly according to a third embodiment of the present invention;
figures 12a, 12b and 12c show a schematic view of the connecting end of the outer sleeve of a syringe assembly according to a fourth embodiment of the present invention.
Detailed Description
The practice and use of the embodiments are discussed in detail below. It should be understood, however, that the specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention. The description herein of the structural positions of the respective components, such as the directions of upper, lower, top, bottom, etc., is not absolute, but relative. When the respective components are arranged as shown in the drawings, these directional expressions are appropriate, but when the positions of the respective components in the drawings are changed, these directional expressions are also changed accordingly.
According to one embodiment of the present invention, an injection assembly is provided. The injection assembly comprises: the outer sleeve is provided with a connecting end for connecting the needle heads, and the connecting end is provided with an external thread matched with the first needle head and an internal thread matched with the second needle head; and the core bar is arranged in the outer sleeve in a sliding manner, and one end of the core bar is provided with a rubber plug.
According to another embodiment of the present invention, an injection device is provided. The injection device comprises an injection assembly and a first needle, wherein the first needle comprises a needle seat and a steel needle fixed on the needle seat, the needle seat is provided with an inner surface and a contact boss protruding from the inner surface, and the contact boss is used for contacting the connecting end of the outer sleeve of the injection assembly.
Through set up the external screw thread at outer telescopic link, this injection subassembly can conveniently simply connect first syringe needle, for example the internal thread syringe needle realizes the liquid medicine injection.
Fig. 1 shows a schematic structural view of an injection assembly 10 of an injection device according to an embodiment of the present invention, fig. 2 shows a cross-sectional view of the injection assembly 10 of an injection device according to an embodiment of the present invention, and fig. 3 shows a schematic structural view of a connecting end of an outer sleeve of the injection assembly of fig. 1.
Specifically, as shown in fig. 1-3, the injection assembly 10 includes an outer sleeve 11 and a plunger rod 12. The outer sleeve 11 is made of thermoplastic. The outer sleeve 11 has a connecting end 13 for connecting a needle, the connecting end 13 being provided with an external thread 131 for cooperation with a first needle and an internal thread 132 for cooperation with a second needle. The core bar 12 is slidably disposed in the outer sleeve 11, and one end of the core bar 12 is provided with a rubber plug 14.
The outer sleeve 11 has a chamber 111 for containing the medical fluid and one end of the stem 12 is located in the chamber 111. When the stem 12 is moved outward, the medical fluid can be sucked into the chamber 111, and when the stem 12 is pushed inward, the medical fluid can be pushed out of the chamber 111 to facilitate the injection of the medical fluid. The plug 14 can serve to seal the chamber 111 and prevent leakage of the medical fluid.
In some embodiments, a hollow frusto-conical boss 15 is provided in the connecting end 13 of the outer sleeve 11, the boss 15 having a passage 16 centrally located therein which communicates with the chamber 111 of the outer sleeve 11.
In practice, the injection assembly 10 is connected to a second needle having external threads, such as a conventional needle, a specific liquid is extracted as a diluent, the diluent is injected into a bottle containing a powder preparation for dissolution, the prepared solvent is sucked into the outer sleeve 11 of the injection assembly 10, the conventional needle is removed from the injection assembly 10, and the injection assembly 10 is connected to a first needle, such as an internal threaded needle, to complete injection.
Fig. 4 shows a cross-sectional view of the first needle 20 of the injection device according to an embodiment of the present invention. The first needle 20 comprises a needle seat 21 and a steel needle 22 fixed to the needle seat 21, the needle seat 21 has an inner surface 211 and a contact boss 212 protruding from the inner surface 211, the contact boss 212 is used for contacting the connecting end 13 of the outer sleeve 11 of the injection assembly 10, and both ends of the steel needle 22 are respectively provided with a needle point 221. In some embodiments, the first needle 20 is an internally threaded needle having internal threads 23. When first needle 20 is mounted to injection assembly 10, internal threads 23 of first needle 20 mate with external threads 131 of connecting end 13 of injection assembly 10.
As shown in connection with fig. 5 and 6, in some embodiments, the ends of the plug 14 are planar. When the first needle 20 is installed on the injection assembly 10, the needle point 221 on the right side of the steel needle 22 of the first needle 20 extends into the channel 16, the diameter of the rubber plug 14 is larger than that of the channel 16, and therefore the rubber plug 14 cannot extend into the channel 16 when pushed to the bottom, so that the situation that the needle point 221 of the steel needle 22 pierces the rubber plug 14 to cause a large residual space is avoided, and waste of liquid medicine is caused.
In some embodiments, as shown in fig. 7 and 8 in combination, the distal end of the plug 14 is extended to form a hollow cylindrical plunger 141 for receiving the steel needle 22 of the first needle 20. When the first needle 20 is installed on the injection assembly 10, the needle point 221 on the right side of the steel needle 22 of the first needle 20 and the cylindrical plunger 141 of the rubber plug 14 both extend into the channel 16, and the needle point 221 on the right side extends into the cylindrical plunger 141, so that the situation that the needle 221 of the steel needle 22 pierces the rubber plug 14 to cause a large residual space is avoided, and waste of liquid medicine is caused.
As shown in fig. 9a, 9b and 9c, the boss 15 has a contact surface 151 for contacting the needle hub 21 of the first needle 20, and the contact surface 151 may be annular or of other shapes. When the first needle 20 is mounted on the connecting end 13 of the outer sleeve 11 of the injection assembly 10, the contact boss 212 of the needle seat 21 enters the channel 16 of the boss 15 of the connecting end 13, the contact surface 151 of the boss 15 is in contact with the inner surface 211 of the needle seat 21, the sealing effect is achieved, liquid medicine is prevented from leaking between the first needle 20 and the injection assembly 10, and the sealing performance between the first needle 20 and the injection assembly 10 is improved. The enlarged diameter of the distal portion of channel 16 forms an annular groove 161 for receiving a contact boss 212 of hub 21.
As shown in fig. 10a, 10b and 10c, the boss 15 has a first contact protrusion 152 protruding from the contact surface 151, and the first contact protrusion 152 may be annular or have another shape. When the first needle 20 is mounted to the connecting end 13 of the outer sleeve 11 of the injection assembly 10, the contact boss 212 of the hub 21 enters the channel 16 of the boss 15 of the connecting end 13, and the first contact protrusion 152 of the boss 15 contacts the inner surface 211 of the hub 21. Since the outer sleeve 11 is made of thermoplastic, the first contact protrusion 152 of the boss 15 has a certain elasticity, when the first needle 20 and the outer sleeve 11 of the injection assembly 10 are screwed, the first contact protrusion 152 has a certain compression deformation, and further contacts with the inner surface 211 of the needle seat 21 more tightly, so that the sealing performance between the first needle 20 and the injection assembly 10 is further improved.
As shown in fig. 11a, 11b and 11c, the boss 15 has a first contact recess 153 recessed in the contact surface 151, the first contact recess 153 being located in the annular groove 161 of the channel 16. The first contact recess 153 may be annular or may have other shapes. When the first needle 20 is mounted on the connecting end 13 of the outer sleeve 11 of the injection assembly 10, the contact boss 212 of the needle seat 21 enters the channel 16 of the boss 15 of the connecting end 13, the first contact concave part 153 of the boss 15 is in contact with the contact boss 212 of the needle seat 21, leakage of liquid medicine between the first needle 20 and the injection assembly 10 is avoided, and sealing performance between the first needle 20 and the injection assembly 10 is improved.
As shown in fig. 12a, 12b, and 12c, the boss 15 has a second contact protrusion 154 protruding from the first contact recess 153, and the second contact protrusion 154 may be annular or have another shape. When the first needle 20 is mounted to the connecting end 13 of the outer sleeve 11 of the injection assembly 10, the contact boss 212 of the hub 21 enters the passage 16 of the boss 15 of the connecting end 13, and the second contact projection 154 of the boss 15 contacts the contact boss 212 of the hub 21. Since the outer sleeve 11 is made of thermoplastic, the second contact convex portion 154 of the boss 15 has a certain elasticity, when the first needle 20 and the outer sleeve 11 of the injection assembly 10 are screwed tightly, the second contact convex portion 154 has a certain compression deformation, and further contacts with the contact convex portion 212 of the needle seat 21 more tightly, thereby further improving the sealing performance between the first needle 20 and the injection assembly 10.
According to an embodiment of the utility model, the outer sleeve of injection assembly has the link that is used for connecting the needle file, and the link is equipped with first syringe needle matched with external screw thread and with second syringe needle matched with internal thread. Through setting up the external screw thread, injection assembly can conveniently simply connect first syringe needle, for example the internal thread syringe needle realizes the liquid medicine injection.
The technical content and technical features of the present invention have been disclosed above, but it should be understood that various changes and modifications can be made to the concept disclosed above by those skilled in the art under the inventive concept of the present invention, and all fall within the scope of the present invention. The above description of embodiments is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.
Claims (10)
1. An injection assembly, comprising:
the outer sleeve is provided with a connecting end for connecting the needle heads, and the connecting end is provided with an external thread matched with the first needle head and an internal thread matched with the second needle head; and
the core bar is slidably arranged in the outer sleeve, and one end of the core bar is provided with a rubber plug.
2. The injection assembly of claim 1, wherein the distal end of the plug is planar.
3. The injection assembly of claim 1, wherein the distal end of the plug extends to form a hollow cylindrical plunger for receiving the steel needle of the first needle.
4. The injection assembly of any one of claims 1 to 3, wherein a hollow frustoconical boss is provided within the connecting end of the outer sleeve.
5. The injection assembly of claim 4, wherein the boss has a contact surface for contacting a hub of the first needle.
6. The injection assembly of claim 5, wherein the boss has a first contact protrusion protruding from the contact surface.
7. The injection assembly of claim 5, wherein the boss has a first contact recess recessed from the contact surface.
8. The injection assembly of claim 7, wherein the boss has a second contact protrusion protruding from the first contact recess.
9. An injection device, comprising:
the injection assembly of any one of claims 1-8; and
the first needle, including the needle file with fixed to the steel needle of needle file, the needle file have the internal surface and protrusion in the contact boss of internal surface, the contact boss is used for contacting the injection subassembly the link of outer sleeve.
10. The injection device of claim 9, wherein the steel needle has a needle tip at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220212845.7U CN217793985U (en) | 2022-01-26 | 2022-01-26 | Injection assembly and injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220212845.7U CN217793985U (en) | 2022-01-26 | 2022-01-26 | Injection assembly and injection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217793985U true CN217793985U (en) | 2022-11-15 |
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ID=83959361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220212845.7U Active CN217793985U (en) | 2022-01-26 | 2022-01-26 | Injection assembly and injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217793985U (en) |
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2022
- 2022-01-26 CN CN202220212845.7U patent/CN217793985U/en active Active
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