CN216169220U

CN216169220U - Medical syringe

Info

Publication number: CN216169220U
Application number: CN202022897708.5U
Authority: CN
Inventors: 毛春元; 毛亚凌
Original assignee: Shanghai Jinta Medical Co ltd
Current assignee: Shanghai Jinta Medical Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2022-04-05
Anticipated expiration: 2030-12-03

Abstract

The utility model discloses a medical injector, comprising: the device comprises a cylinder body, a first sealing ring and a second sealing ring, wherein an inner cavity is formed in the cylinder body, and the bottom of the inner cavity is provided with a conical bottom surface; the communicating port is connected to the barrel, and the inside of the communicating port is communicated with the bottom of the inner cavity; the push rod and the tapered end part are arranged at the top of the push rod, the tapered end part and the tapered bottom surface have the same tapered shape, and the tapered end part is attached to the tapered bottom surface under the pushing of the push rod. The conical end part and the conical bottom surface of the utility model can be completely attached, so that the liquid medicine in the cylinder can be completely extruded, and no residue is left. The conical bottom surface can guide the residual liquid medicine at the bottom of the inner cavity to the communication port, so that no residue is left on the conical bottom surface.

Description

Medical syringe

Technical Field

The utility model relates to a medical injector.

Background

The existing medical injector is widely used in medical treatment. The prior medical injector always has part of the liquid medicine remained in the syringe after the injection of the liquid medicine. The residual liquid medicine not only causes waste, but also causes great difficulty in recycling the syringe. The medical solution in the syringe flows out during disposal, is mixed with other residual medical solution, and the like, and thus, the collection difficulty is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects that liquid medicine is easy to remain in a medical injector, waste is caused, and the recovery of the injector is difficult in the prior art, and provides a medical injector.

The utility model solves the technical problems through the following technical scheme:

a medical injector, characterized in that it comprises:

the device comprises a cylinder body, a first sealing ring and a second sealing ring, wherein an inner cavity is formed in the cylinder body, and the bottom of the inner cavity is provided with a conical bottom surface;

the communicating port is connected to the barrel, and the inside of the communicating port is communicated with the bottom of the inner cavity;

the push rod and the tapered end part are arranged at the top of the push rod, the tapered end part and the tapered bottom surface have the same tapered shape, and the tapered end part is attached to the tapered bottom surface under the pushing of the push rod.

The conical end part and the conical bottom surface of the utility model can be completely attached, so that the liquid medicine in the cylinder can be completely extruded, and no residue is left. The conical bottom surface can guide the residual liquid medicine at the bottom of the inner cavity to the communication port, so that no residue is left on the conical bottom surface.

Preferably, the material of the tapered end portion is a flexible material, wherein the tapered end portion deforms under the pushing of the push rod and fits with the tapered bottom surface. The flexible material deforms when pressed, and thus can fit the tapered bottom surface well. The flexible material also provides a sealing capability so that the peripheral side of the tapered end portion can seal against the inner wall surface of the lumen.

Preferably, the material of the tapered end is rubber.

Preferably, a threaded column is arranged on the push rod, and a threaded groove is formed on the inner side of the tapered end part, wherein the threaded groove on the inner side of the tapered end part is in threaded connection with the threaded column on the push rod, so that the tapered end part and the push rod are connected into a whole. The push rod and the conical end part can be connected into a whole, and when the push rod and the conical end part are made of different materials, the push rod and the conical end part can be conveniently connected together.

Preferably, a convex sealing rib is formed on the peripheral side of the tapered end portion, wherein the sealing rib is deformed under pressure and is attached to the inner wall surface of the inner cavity. The sealing convex ribs play a role in sealing, and residual liquid is prevented from flowing out through the conical end parts.

Preferably, a surrounding connecting wall is formed on the outer side of the communication opening, wherein a thread is formed on the inner side of the connecting wall. The connecting wall provides a connection to the needle. Wherein the threaded connection ensures the replaceability of the needle. The strength of the connection can be secured by performing the connection through a separate connection wall instead of the communication port.

Preferably, an axial extension length of the connecting wall is smaller than an axial extension length of the communication port, wherein the communication port is exposed at an end portion of the connecting wall. The communicating port can extend into the needle head and is communicated with the needle head to prevent liquid from flowing out.

Preferably, the communication port is tapered in a direction away from the cylinder. The communicating port with the gradual change shape is beneficial to butt joint with the needle head, and smooth connection is ensured.

Preferably, a connecting groove is formed in one side, far away from the conical end, of the push rod, an annular sealing element is embedded in the connecting groove, and the annular sealing element deforms under pressure and is attached to the connecting groove and the inner wall of the inner cavity. The annular sealing element plays the last sealing role to ensure that liquid cannot flow out of the cylinder body.

Preferably, the opening of the barrel is provided with a limiting boss protruding inwards, the side surface of the connecting groove is provided with a limiting convex rib protruding outwards, and the limiting boss is clamped with the limiting convex rib. The limiting boss and the limiting convex rib can prevent the push rod from sliding out integrally.

The positive progress effects of the utility model are as follows: the conical end part and the conical bottom surface of the utility model can be completely attached, so that the liquid medicine in the cylinder can be completely extruded, and no residue is left. The conical bottom surface can guide the residual liquid medicine at the bottom of the inner cavity to the communication port, so that no residue is left on the conical bottom surface.

Drawings

Fig. 1 is a schematic view showing the overall structure of a medical injector according to a preferred embodiment of the present invention.

Fig. 2 is a cross-sectional view of a medical injector according to a preferred embodiment of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 2.

Fig. 5 is an enlarged view of a portion C in fig. 2.

Detailed Description

The utility model is further illustrated by the following examples, which are not intended to limit the scope of the utility model.

As shown in fig. 1 to 5, the present embodiment discloses a medical injector, wherein, as shown in fig. 1 and 2, the medical injector of the present embodiment comprises a barrel body 1, a cavity 10 is formed in the barrel body 1, wherein the bottom of the cavity 10 has a conical bottom surface 11.

As shown in fig. 1 and 2, the medical injector of the present embodiment includes a communication port 4, the communication port 4 is connected to the barrel 1, and the inside of the communication port 4 communicates with the bottom of the inner chamber 10.

As shown in fig. 1 and 2, the medical injector of the present embodiment includes a push rod 2 and a tapered end portion 3, the tapered end portion 3 is disposed on the top of the push rod 2, and the tapered end portion 3 and the tapered bottom surface 11 have the same tapered shape, wherein the tapered end portion 3 is engaged with the tapered bottom surface 11 under the pushing of the push rod 2.

The tapered end part 3 and the tapered bottom surface 11 of the utility model can be completely attached, so that the liquid medicine in the cylinder body 1 can be completely extruded, and no residue is left. The tapered bottom surface 11 guides the residual liquid chemical at the bottom of the cavity 10 to the communication port 4, so that no residual liquid chemical remains on the tapered bottom surface 11.

In this embodiment, the material of the tapered end portion 3 is a flexible material, wherein the tapered end portion 3 deforms under the pushing of the push rod 2 and fits with the tapered bottom surface 11. The flexible material will deform under pressure and will thus fit well to the conical bottom surface 11. The flexible material also provides sealing capability so that the peripheral side of the tapered end portion 3 can seal against the inner wall surface of the lumen 10. The material of the tapered end portion 3 is preferably rubber.

As shown in fig. 2 and 4, the push rod 2 of the present embodiment is provided with a threaded post 23, and a threaded groove is formed on the inner side of the tapered end portion 3, wherein the threaded groove on the inner side of the tapered end portion 3 is in threaded connection with the threaded post 23 on the push rod 2, so that the tapered end portion 3 and the push rod 2 are connected into a whole. The push rod 2 and the conical end part 3 can be connected into a whole, and when different materials are adopted for the push rod 2 and the conical end part 3, the push rod and the conical end part can be conveniently connected together.

As shown in fig. 2 and 4, the tapered end portion 3 of the present embodiment is formed with a convex sealing bead 31 on the peripheral side thereof, wherein the sealing bead 31 is deformed by pressure and is fitted to the inner wall surface of the cavity 10. The sealing bead 31 serves as a seal to prevent residual liquid from flowing out through the conical end 3.

As shown in fig. 2 and 5, the communication port 4 of the present embodiment is formed with a surrounding connection wall 5 on the outside, wherein the connection wall 5 is formed with a screw thread on the inside. The connecting wall 5 provides the connection to the needle. Wherein the threaded connection ensures the replaceability of the needle. The strength of the connection can be secured by the connection through the separate connection wall 5 instead of the communication port 4.

As shown in fig. 2 and 5, the connecting wall 5 of the present embodiment has an axial extension smaller than that of the communication port 4, wherein the communication port 4 is exposed at an end portion of the connecting wall 5. The communicating port 4 can extend into the needle head to be communicated with the needle head, and liquid is prevented from flowing out.

As shown in fig. 2 and 5, the communication port 4 of the present embodiment is tapered in a direction away from the cylinder 1. The communicating port 4 with the gradual change shape is beneficial to butt joint with the needle head, and the smooth connection is ensured.

As shown in fig. 2 and 3, a connecting groove 21 is provided on a side of the push rod 2 away from the tapered end portion 3, an annular sealing member 6 is embedded in the connecting groove 21, and the annular sealing member 6 deforms under pressure and adheres to the connecting groove 21 and an inner wall of the inner cavity 10. The annular seal 6 acts as a final seal to ensure that liquid does not flow out of the cartridge 1.

As shown in fig. 2 and fig. 3, the opening of the cylinder 1 of this embodiment is provided with a limiting boss 12 protruding inward, the side surface of the connecting groove 21 is provided with a limiting rib 22 protruding outward, and the limiting boss 12 is engaged with the limiting rib 22. The limiting boss 12 and the limiting convex rib 22 can prevent the push rod 2 from sliding out integrally.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.

Claims

1. A medical injector, characterized in that it comprises:

the communicating port is connected to the barrel, the inside of the communicating port is communicated with the bottom of the inner cavity, a surrounding connecting wall is formed on the outer side of the communicating port, and threads are formed on the inner side of the connecting wall;

2. The medical injector according to claim 1, wherein the material of the tapered end is a flexible material, wherein the tapered end deforms under the push of the push rod and conforms to the tapered bottom surface.

3. The medical injector of claim 2, wherein the material of the tapered end is rubber.

4. The medical injector according to claim 1, wherein the push rod is provided with a threaded post, and the tapered end portion is formed with a threaded groove at an inner side thereof, wherein the threaded groove at the inner side of the tapered end portion is threadedly coupled with the threaded post of the push rod, so that the tapered end portion is integrally coupled with the push rod.

5. The medical injector according to claim 1, wherein a convex sealing rib is formed on a peripheral side of the tapered end portion, and wherein the sealing rib is deformed in compression and is brought into abutment with an inner wall surface of the inner chamber.

6. The medical injector according to claim 1, wherein an axial extension of the connecting wall is smaller than an axial extension of the communication port, wherein the communication port is exposed at an end of the connecting wall.

7. A medical injector according to claim 1, characterized in that the communication opening tapers in a direction away from the barrel.

8. The medical injector according to claim 1, wherein a connecting groove is formed on the side of the push rod away from the tapered end, and an annular sealing member is embedded in the connecting groove and deformed under pressure and attached to the connecting groove and the inner wall of the inner cavity.

9. The medical injector as claimed in claim 8, wherein the opening of the barrel is provided with a limit boss protruding inwards, the side surface of the connection groove is provided with a limit rib protruding outwards, and the limit boss is engaged with the limit rib.