CN111760125A

CN111760125A - Puncture needle assembly for internal medicine

Info

Publication number: CN111760125A
Application number: CN202010687028.2A
Authority: CN
Inventors: 徐敏旺
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2020-10-13

Abstract

The invention discloses a puncture needle assembly for internal medicine, which relates to the field of medical instruments and comprises a puncture needle head and a hemostasis socket, wherein one end of the puncture needle head is connected with a puncture needle, and the other end of the puncture needle head is connected with the hemostasis socket through a catheter. According to the invention, the sealing block is arranged in the anti-backflow cavity formed in the hemostatic socket, and the sealing block is sealed and pressed against the joint of the anti-backflow cavity and the liquid injection channel under the elastic force action of the spring, so that the one-way liquid inlet effect is realized, and the blood is prevented from flowing backwards; after the injection is finished, the upper end of the screw is integrally formed with a turning head to be turned, so that the flow stopping pin vertically penetrates through the liquid injection channel, the liquid injection channel is sealed, and the anti-backflow effect is further ensured; the plug is sealed and plugged in the jack arranged at the outer port of the hemostatic socket, so that the hemostatic socket is prevented from being polluted.

Description

Puncture needle assembly for internal medicine

Technical Field

The invention relates to the field of medical instruments, in particular to a puncture needle assembly for internal medicine.

Background

In clinical treatment in internal medicine of hospitals, intravenous infusion is required, and in order to reduce pain caused by repeated venipuncture and fear of injection, an indwelling needle is generally used for injection. The puncture needle can make blood flow out of the puncture needle, and in order to avoid blood pollution, the puncture needle needs to be ensured to have good anti-backflow effect and avoid the pollution of an injection port.

Disclosure of Invention

The present invention is directed to a medical needle assembly that solves the problems set forth above in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a pjncture needle subassembly for internal medicine, includes puncture needle head and hemostasis socket, puncture needle head one end is connected with the pjncture needle, and the puncture needle head other end has the hemostasis socket through pipe connection, and the inside priming passageway that is linked together with the pipe of seting up of hemostasis socket.

Preferably, the hemostasis socket is close to one side inside the pipe and has been seted up and has been prevented the adverse current chamber, prevents that the one end that the adverse current intracavity portion kept away from the connecting tube is equipped with sealed piece, is connected with the spring between sealed piece and the another inside wall of the adverse current chamber of preventing, and sealed piece is sealed to be pressed and is prevented the adverse current chamber and annotate the junction of liquid passageway.

Preferably, the spring is a conical or parabolic coil spring, the top diameter of the spring is fixedly connected with the sealing block, the bottom diameter of the spring is fixedly connected with the other inner side wall of the anti-backflow cavity, the cross section of a spring wire of the spring is semicircular, the central angle corresponding to the circular arc of the cross section of the semicircular spring wire is 180-270 degrees, the cylindrical surface of the spring wire faces the sealing block, the pitch of the spring is sequentially reduced from the top diameter to the bottom diameter, the sealing block is a hemispherical sealing block, and small densely distributed pits are formed in the spherical surface of the sealing block or a single large pit is formed in the hemispherical top.

Preferably, a screw seat is integrally formed at the upper end of the middle part of the hemostatic socket, a vertically downward screw is screwed along the upper end of the screw seat, a flow stopping pin is integrally formed at the lower end of the screw, and a turning head is integrally formed at the upper end of the screw.

Preferably, the flow stopping pin vertically penetrates through the liquid injection channel, and the diameter of the flow stopping pin is larger than the inner diameter of the liquid injection channel.

Preferably, the outer port of the hemostatic socket is provided with a jack, and a sealing plug is hermetically inserted into the jack.

Preferably, one side of the sealing plug is connected with a connecting belt, one end of the connecting belt is connected with a lantern ring, and the lantern ring is clamped at the outer end part of the hemostatic socket.

The invention has the technical effects and advantages that:

1. according to the invention, the sealing block is arranged in the anti-backflow cavity formed in the hemostatic socket, and the sealing block is sealed and pressed against the joint of the anti-backflow cavity and the liquid injection channel under the elastic force action of the spring, so that the one-way liquid inlet effect is realized, and the blood is prevented from flowing backwards;

2. after the injection is finished, the upper end of the screw is integrally formed with the turning head to be turned, so that the flow stopping pin vertically penetrates through the liquid injection channel to seal the liquid injection channel, and the anti-backflow effect is further ensured;

3. the invention prevents pollution by plugging the sealing plug into the jack arranged at the outer port of the hemostatic socket in a sealing way.

4. The invention can effectively reduce the resistance of the sealing block in the injection process and increase the anti-reflux effect after the injection through the design of the conical or parabolic spiral spring and the semicircular spring wire, and the spring with the increased pitch and the sealing block with the pits are beneficial to pressing the sealing block into the anti-reflux cavity by liquid in the injection process.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a front cross-sectional view of the structure of the present invention.

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

In the figure: 1. a puncture needle head; 101. puncturing needle; 2. a conduit; 3. a hemostatic socket; 4. an anti-reflux cavity; 5. a sealing block; 6. a spring; 7. a screw seat; 8. a screw; 9. a flow stopping pin; 10. turning the head; 11. a jack; 12. a sealing plug; 13. and a connecting belt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a puncture needle assembly for internal medicine as shown in figures 1-3, which comprises a puncture needle head 1 and a hemostasis socket 3, and is combined with figures 2 and 3, wherein one end of the puncture needle head 1 is connected with a puncture needle 101, the other end of the puncture needle head 1 is connected with the hemostasis socket 3 through a catheter 2, a liquid injection channel communicated with the catheter 2 is arranged inside the hemostasis socket 3, a backflow prevention cavity 4 is arranged inside one side of the hemostasis socket 3, which is close to the catheter 2, a sealing block 5 is arranged at one end, which is far away from the catheter 2, inside the backflow prevention cavity 4, a spring 6 is connected between the sealing block 5 and the other inner side wall of the backflow prevention cavity 4, and under the elastic force of the spring 6, the sealing block 5 is sealed and pressed against the joint of the backflow prevention cavity 4 and the liquid injection channel, so that the effect of. The spring 6 is a conical or parabolic spiral spring, the top diameter of the spring 6 is fixedly connected with the sealing block 5, the bottom diameter of the spring 6 is fixedly connected with the other inner side wall of the anti-backflow cavity 4, the section of a spring wire of the spring 6 is semicircular, the central angle corresponding to the circular arc of the section of the semicircular spring wire is 180-270 degrees, namely, the spring wire faces one side of the guide pipe 2 and is a plane or a groove, the cylindrical surface of the spring wire faces the sealing block 4, the pitch of the spring 6 is sequentially reduced from the top diameter to the bottom diameter, the sealing block 4 is a hemispherical sealing block, and densely distributed small pits are arranged on the spherical surface of the sealing block or a single large pit is arranged at the hemispherical top.

As shown in a combined graph 2 and a combined graph 3, a screw seat 7 is integrally formed at the upper end of the middle of the hemostatic socket 3, a vertically downward screw 8 is screwed along the upper end of the screw seat 7, a flow stopping pin 9 is integrally formed at the lower end of the screw 8, a turning head 10 is turned through the upper end of the screw 8, the flow stopping pin 9 vertically penetrates through the liquid injection channel, the liquid injection channel is sealed, the anti-backflow effect is further guaranteed, the diameter of the flow stopping pin 9 is larger than the inner diameter of the liquid injection channel, and the sealing effect of the flow stopping pin 9 on the liquid injection channel is guaranteed.

With reference to fig. 1 and 3, the outer port of the hemostatic socket 3 is provided with a jack 11 for insertion of a syringe, the plug 11 is provided with a sealing plug 12 in sealing insertion, after the injection is completed, the outer port of the hemostatic socket 3 is sealed to prevent contamination, one side of the sealing plug 12 is connected with a connecting band 13, one end of the connecting band 13 is connected with a lantern ring, and the lantern ring is clamped at the outer end of the hemostatic socket 3 to prevent the sealing plug 12 from dropping and losing.

When the invention is used, the injector is inserted into the jack 11 arranged on the hemostatic socket 3 for injection, the liquid medicine flows through the catheter 2, the puncture needle head 1 and the puncture needle 101 along the liquid injection channel inside the hemostatic socket 3 and enters the vein, wherein the anti-backflow cavity 4 arranged inside the hemostatic socket 3 is internally provided with the sealing block 5, and the sealing block 5 is sealed and pressed on the connection part of the anti-backflow cavity 4 and the liquid injection channel under the elastic action of the spring 6, thereby playing the role of one-way liquid inlet and preventing the blood from flowing backwards; after the injection is finished, the upper end of the screw 8 is integrally formed with the turning head 10 to be turned, so that the flow stopping pin 9 vertically penetrates through the liquid injection channel to seal the liquid injection channel, and the anti-reflux effect is further ensured; and finally, the sealing plug 12 is sealed and plugged in the jack 11 arranged at the outer port of the hemostatic socket 3 to prevent pollution.

The applicant finds in practice that the technical scheme also has the following technical problems that the common spiral spring and the sealing block have large resistance to liquid during injection and have poor anti-backflow effect; in order to solve the technical problem, a conical or parabolic spring with an improved spring wire and an improved sealing block are arranged, and the specific working process of the improvement is as follows: in the injection process, the injection liquid more easily compresses the sealing block into the anti-backflow cavity through the concave pits on the surface of the sealing block, the section of the spring wire is semicircular, the resistance to the injection liquid is small, the pitch of the spring is sequentially reduced from the top diameter to the bottom diameter, so that the front section of the spring is more easily compressed, after the injection is finished, when the blood flows back, one side of the spring wire, which faces the catheter 2, is a plane or a groove, and the liquid more easily generates pressure on the spring, so that the sealing block is more easily closed; through the arrangement, the anti-reflux opening device achieves better opening and anti-reflux effects.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a pjncture needle subassembly for internal medicine, includes puncture needle head (1) and hemostasis socket (3), its characterized in that: one end of the puncture needle head (1) is connected with a puncture needle (101), the other end of the puncture needle head (1) is connected with a hemostasis socket (3) through a catheter (2), a liquid injection channel communicated with the catheter (2) is arranged inside the hemostasis socket (3), one side of the hemostasis socket (3) close to the catheter (2) is internally provided with an anti-backflow cavity (4), one end of the anti-backflow cavity (4) far away from the connecting catheter (2) is provided with a sealing block (5), a spring (6) is connected between the sealing block (5) and the other inner side wall of the anti-backflow cavity (4), the sealing block (5) is sealed and pressed at the joint of the anti-backflow cavity (4) and the liquid injection channel, the spring (6) is a conical or parabolic coil spring, the top diameter of the spring (6) is fixedly connected with the sealing block (5), the bottom diameter of the spring (6) is fixedly connected with the other inner side wall of the anti-backflow cavity (, the section of a spring wire of the spring (6) is semicircular, the central angle corresponding to the circular arc of the section of the semicircular spring wire is 180-270 degrees, the cylindrical surface of the spring wire faces the sealing block (5), the pitch of the spring (6) is sequentially reduced from the top diameter to the bottom diameter, the sealing block (5) is hemispherical, and densely distributed small pits are formed in the spherical surface of the sealing block (5) or a single large pit is formed in the top of the hemisphere.

2. A medical needle assembly as set forth in claim 1, wherein: the hemostatic plug is characterized in that a screw seat (7) is integrally formed at the upper end of the middle of the hemostatic plug (3), a vertically downward screw (8) is screwed along the upper end of the screw seat (7), a flow stopping pin (9) is integrally formed at the lower end of the screw (8), and a turning head (10) is integrally formed at the upper end of the screw (8).

3. A medical needle assembly as set forth in claim 2, wherein: the flow stopping pin (9) vertically penetrates through the liquid injection channel, and the diameter of the flow stopping pin (9) is larger than the inner diameter of the liquid injection channel.

4. A medical needle assembly as set forth in claim 1, wherein: the outer port of the hemostatic socket (3) is provided with a jack (11), and a sealing plug (12) is hermetically inserted in the jack (11).

5. A medical needle assembly as set forth in claim 4, wherein: one side of the sealing plug (12) is connected with a connecting belt (13), one end of the connecting belt (13) is connected with a lantern ring, and the lantern ring is clamped at the outer end part of the hemostatic socket (3).