Radio frequency trocar with positioning ring

Abstract

The utility model provides a radio frequency trocar with a positioning ring, which solves the problems of radio frequency trocar puncture depth control and the like, and comprises a needle tube with a coating, the positioning ring is mounted on the needle tube, a needle tube seat is fixed at one end of the needle tube, a needle core seat is assembled in the needle tube seat, and the needle core seat is connected with a needle core which is assembled in the needle tube in a sliding manner. A locking assembly is arranged between the positioning ring and the needle tube, and a fixing assembly is arranged between the needle tube seat and the needle core seat. The puncture positioning device has the advantages of good puncture positioning effect, stable structure and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a radio frequency cannula needle with a positioning ring. BACKGROUND

[0002] The radio frequency therapeutic instrument generates a radio frequency current, and the current forms a loop between the working electrode tip placed at the affected part and the dispersion electrode placed at other parts through the body tissue. The radio frequency current passes through the tissue to generate a continuously changing electric field, and the electric field exerts force on the electrolyte ions in the tissue to make the ions move back and forth at a very fast speed. The friction and impact of the ion flow in the tissue generate a magnetic field / heat, which is manifested as a field effect / thermal effect in the tissue. In the prior art, the positioning of the puncture position and the insertion depth of the puncture needle are completely based on the experience of the doctor. Thus, position errors are more likely to occur, and not only is repeated puncture easy to occur, but the risk of infection is also increased.

[0003] In order to solve the problems in the prior art, people have made long-term exploration and proposed various solutions. For example, a radio frequency puncture cannula needle [202020962721.1] is disclosed in Chinese patent documents, which comprises a needle seat and a needle tube fitted on the needle seat. A hinge shaft is arranged on the needle seat, and the center line of the hinge shaft is perpendicular to the center line of the needle tube. A rotating roller is sleeved on the hinge shaft, and a contraction line connected to the end of the needle tube is fixed on the rotating roller. A rocker for easy rotation is connected to the rotating roller.

[0004] The above-mentioned scheme solves the puncture positioning problem to some extent, but the scheme still has many problems, such as the inability to accurately control the puncture depth. SUMMARY

[0005] The utility model aims at the above -mentioned problem, provides a kind of radio frequency cannula needle with positioning ring with reasonable design, and puncture depth control effect is good.

[0006] To achieve the above object, the utility model adopts the following technical scheme: a radio frequency cannula needle with positioning ring, including the needle tube with coating, and the needle tube is installed with positioning ring, and the needle tube one end is fixed with needle tube seat, and the needle tube seat is assembled with needle core seat, and the needle core seat is connected with needle core that is slidably assembled in the needle tube, and locking assembly is arranged between the positioning ring and the needle tube, and fixed assembly is arranged between the needle tube seat and the needle core seat.

[0007] In the radio frequency cannula needle with positioning ring, the locking assembly includes a clamping assembly arranged on the inner side of the positioning ring, and the positioning ring is provided with a limiting assembly opposite to the clamping assembly.

[0008] In the above-mentioned radiofrequency trocar with a positioning ring, the occlusal assembly includes a locking ring rotatably mounted on the inner side of the positioning ring and facing each other front and back, wherein one of the locking rings has locking bevels arranged in a centrally symmetrical manner, and the other locking ring has an elastic locking block that corresponds one-to-one to the locking bevel and presses against it.

[0009] In the above-mentioned radiofrequency trocar with a positioning ring, the limiting assembly includes a locking ring threadedly connected to the inner side of the front and rear ends of the positioning ring, and the locking direction of the locking ring relative to the positioning ring is opposite to the rotation direction of the locking ring.

[0010] In the above-mentioned radiofrequency trocar with a positioning ring, the fixing assembly includes a fixing groove arranged on the inner side of the needle tube seat and arranged in a centrally symmetrical manner. The needle core seat has a fixing bar that is slidably inserted in the fixing groove, and a locking assembly is provided between the fixing grooves.

[0011] In the above-mentioned radiofrequency trocar with a positioning ring, the locking assembly includes a locking block telescopically mounted on the fixing bar and extending radially, an elastic reset member is arranged between the locking block and the needle core seat, and a locking hole is opened on the needle tube seat that extends into the fixing groove and is for the locking block to be inserted.

[0012] In the above-mentioned radiofrequency trocar with a positioning ring, the needle tube and the needle core are made of stainless steel.

[0013] In the above-mentioned radiofrequency trocar with a positioning ring, the coating on the needle tube is made of polytetrafluoroethylene.

[0014] In the above-mentioned radiofrequency trocar with a positioning ring, the needle tube seat and the needle core seat are made of polycarbonate.

[0015] In the above-mentioned radiofrequency trocar with a positioning ring, the needle tube is divided into an insulating area and a conductive area. The insulating area is the area covered by the coating, and the conductive area is arranged at the end of the needle tube and has a puncture tip.

[0016] Compared with the existing technology, the advantages of the present invention are: the positioning ring is relatively fixed to the needle tube through the locking assembly, and the fixing assembly ensures that the position of the needle core is fixed, thereby accurately controlling the puncture depth of the needle tube; the fixing assembly can realize the rapid disassembly and assembly of the needle core seat and the needle tube seat, making it convenient to remove the needle core after the puncture is completed; the outer side of the needle tube is coated, which on the one hand provides insulation and on the other hand ensures the locking stability of the positioning ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Fig. 1 It is a structural diagram of the utility model;

[0018] Fig. 2 It is a partial cross-sectional view of the utility model;

[0019] Fig. 3 It is another partial cross-sectional view of the utility model;

[0020] In the figure, the needle tube 1, the positioning ring 2, the needle core seat 3, the needle core 4, the locking assembly 5, the locking ring 51, the locking slope 52, the elastic locking block 53, the locking ring 54, the fixing assembly 6, the fixing groove 61, the fixing strip 62, the locking block 63, the locking hole 64, the needle tube seat 7. DETAILED DESCRIPTION

[0021] The utility model will be made further detailed explanation in combination with the drawings and specific embodiment.

[0022] As Figs. 1-3 shown, a positioning ring radio frequency hub needle, including the needle tube 1 with coating, the needle tube 1 end head is provided with puncture structure. In order to realize axial location, the needle tube 1 is installed with positioning ring 2, and one end of needle tube 1 is fixed with needle tube seat 7, and needle tube seat 7 is assembled with needle core seat 3, and needle core seat 3 is connected with needle core 4 that is slidingly assembled in needle tube 1, and after needle core seat 3 is inserted with needle tube seat 7, needle core 4 protrudes relative to needle tube 1 to meet the puncture demand. The locking assembly 5 is arranged between the positioning ring 2 and the needle tube 1, which considers the circumferential and axial locking of the positioning ring 2, and the fixing assembly 6 is arranged between the needle tube seat 7 and the needle core seat 3, which ensures that the needle tube seat 7 and the needle core seat 3 can be quickly assembled or separated.

[0023] Specifically, unlike the existing thread connection mode, the locking assembly 5 in the embodiment includes a clamping assembly arranged on the inner side of the positioning ring 2, and the positioning ring 2 is provided with a limiting assembly opposite to the clamping assembly. The clamping assembly mainly provides radial locking force, and the limiting assembly ensures the stability of the clamping assembly.

[0024] Further, the clamping assembly includes locking rings 51 rotatably installed on the inner side of the positioning ring 2 and opposite to each other, one of the locking rings 51 has locking slopes 52 arranged in a central symmetry, and the other locking ring 51 has elastic locking blocks 53 corresponding to the locking slopes 52 and being pressed thereon. The locking rings 51 are rotated manually, and the elastic locking blocks 53 move radially under the guidance of the locking slopes 52 and are pressed against the needle tube 1.

[0025] Further, compared with the conventional limiting structure, the limiting assembly in the embodiment includes locking rings 54 threadedly connected to the inner side of the front and rear ends of the positioning ring 2, and the locking direction of the locking ring 54 relative to the positioning ring 2 is opposite to the rotation direction of the locking ring 51, which can avoid loosening of the clamping assembly during movement.

[0026] In addition, the fixing assembly 6 realizes the circumferential positioning of the needle core seat 3 and the needle tube seat 7, including fixing grooves 61 arranged on the inner side of the needle tube seat 7 and arranged in a central symmetry, the needle core seat 3 has fixing strips 62 slidingly inserted into the fixing grooves 61, and the fixing grooves 61 and the fixing grooves 61 are provided with a locking assembly to realize axial positioning.

[0027] Meanwhile, the locking assembly comprises a locking block 63 which is telescopically mounted on the fixing strip 62 and extends radially, and the locking block 63 is provided with an elastic reset member between the needle core seat 3, and the needle tube seat 7 is provided with a locking hole 64 which extends into the fixing groove 61 and is inserted by the locking block 63. When the needle core seat 3 and the needle tube seat 7 are inserted into each other, the locking hole 64 and the locking block 63 are automatically inserted and locked, and when it is necessary to unlock and separate, the locking block 63 can be pressed to achieve separation.

[0028] Obviously, the needle tube 1 and the needle core 4 are made of stainless steel, and the needle tube 1 can be repeatedly sterilized and used, and the stainless steel material ensures the structural strength and has a long service life.

[0029] Obviously, the coating on the needle tube 1 is made of polytetrafluoroethylene to play an insulating role, and the polytetrafluoroethylene needle tube 1 will not produce additional resistance during the puncture process.

[0030] Preferably, the needle tube seat 7 and the needle core seat 3 are made of polycarbonate, which can withstand radiation and heat sterilization, and its transparent property facilitates the judgment of the state of the internal needle tube 1 and the needle core 4.

[0031] Obviously, the needle tube 1 is divided into an insulating area and a conductive area, the insulating area is the area covered by the coating, and the conductive area is provided at the end of the needle tube 1 and leaves a puncture sharp head. After puncture, the needle core 4 is withdrawn, the needle tube 1 is retained, and the radiofrequency ablation electrode is inserted into the sleeve, and then connected with the electrode connecting wire and the radiofrequency therapeutic instrument to start stimulation and damage.

[0032] In summary, the principle of the embodiment is that the needle core 4 is slidably inserted into the needle tube 1, and the end thereof is fixed by the fixing assembly 6 between the needle tube seat 7 and the needle core seat 3, wherein the outside of the needle tube 1 is provided with the positioning ring 2 which can adjust the axial direction by the locking assembly 5, so as to accurately control the puncture depth of the needle tube 1.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0034] Although the terms such as needle tube 1, positioning ring 2, needle core seat 3, needle core 4, locking assembly 5, locking ring 51, locking inclined surface 52, elastic locking block 53, locking ring 54, fixing assembly 6, fixing groove 61, fixing strip 62, locking block 63, locking hole 64, needle tube seat 7 are used more frequently herein, but the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the present application; any interpretation of them as any additional limitation is contrary to the spirit of the present application.

Claims

1. A radiofrequency trocar with a positioning ring, comprising a coated needle tube (1), a positioning ring (2) mounted on the needle tube (1), a needle tube seat (7) fixed to one end of the needle tube (1), a needle core seat (3) assembled in the needle tube seat (7), and a needle core seat (4) connected to the needle core seat (3) slidably assembled in the needle tube (1), characterized in that: A locking assembly (5) is provided between the positioning ring (2) and the needle tube (1), and a fixing assembly (6) is provided between the needle tube seat (7) and the needle core seat (3).

2. The radiofrequency trocar with a positioning ring according to claim 1, characterized in that: The locking assembly (5) comprises an engaging assembly arranged inside the positioning ring (2), and the positioning ring (2) is internally provided with a limiting assembly opposite to the engaging assembly.

3. The radiofrequency trocar with a positioning ring according to claim 2, characterized in that: The engaging assembly comprises a locking ring (51) rotatably mounted on the inner side of the positioning ring (2) and facing each other front and back, wherein one locking ring (51) has locking inclined surfaces (52) arranged in a central symmetrical manner, and the other locking ring (51) has an elastic locking block (53) corresponding to the locking inclined surfaces (52) and pressing against them.

4. The radiofrequency trocar with a positioning ring according to claim 3, characterized in that: The limiting assembly comprises a locking ring (54) threadedly connected to the inner sides of the front and rear ends of the positioning ring (2); the locking direction of the locking ring (54) relative to the positioning ring (2) is opposite to the rotation direction of the locking ring (51).

5. The radiofrequency trocar with a positioning ring according to claim 1, characterized in that: The fixing assembly (6) includes a fixing groove (61) arranged on the inner side of the needle tube seat (7) and arranged in a central symmetrical manner. The needle core seat (3) has a fixing strip (62) slidably inserted into the fixing groove (61). A locking assembly is provided between the fixing grooves (61).

6. The radiofrequency trocar with a positioning ring according to claim 5, characterized in that: The locking assembly comprises a locking block (63) which is telescopically mounted on the fixing strip (62) and extends radially, an elastic reset member is provided between the locking block (63) and the needle core seat (3), and a locking hole (64) is provided on the needle tube seat (7) which extends into the fixing groove (61) and is provided for the locking block (63) to be inserted.

7. The radiofrequency trocar with a positioning ring according to claim 1, characterized in that: The needle tube (1) and the needle core (4) are made of stainless steel.

8. The radiofrequency trocar with a positioning ring according to claim 1, characterized in that: The coating on the needle tube (1) is made of polytetrafluoroethylene.

9. The radiofrequency trocar with a positioning ring according to claim 1, characterized in that: The needle tube seat (7) and the needle core seat (3) are made of polycarbonate.

10. The radiofrequency trocar with a positioning ring according to claim 1, characterized in that: The needle tube (1) is divided into an insulating area and a conductive area. The insulating area is an area covered by a coating, and the conductive area is arranged at the end of the needle tube (1) and has a puncture tip.

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