A radio frequency electric wave puncture needle

Abstract

The present invention discloses a radiofrequency wave puncture needle. When the knife shell is aligned with the skin incision and gently pressed downward, the skin resistance pushes the knife shell to compress the elastic movable mechanism, causing the knife body to extend out of the knife shell, and making the second ends of the first electrode body and the second electrode body come into contact to generate a first control instruction. The controller controls the radiofrequency wave generator to emit radiofrequency waves through the knife body to ablate skin cells; when the knife body completely cuts through the skin and enters the body, the thrust generated by the compression deformation of the elastic movable mechanism causes the knife shell to move away from the first electrode body and the second electrode body, so that the second ends of the first electrode body and the second electrode body are separated to generate a second control instruction, and the controller controls the radiofrequency wave generator to stop emitting radiofrequency waves. Therefore, the present invention only needs to press on the skin with a small force to perform skin puncture, which can not only achieve precise puncture, but also avoid damaging tissues and blood vessels.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a radiofrequency wave puncture needle. Background Art

[0002] In current minimally invasive surgeries, the most important tool is the puncture needle. The puncture needle is used to puncture the abdominal wall and establish a channel between the outside and the abdominal cavity, and then other surgical instruments can enter the patient's body through this channel for surgical operations. The structure of the trocar mainly includes a puncture sleeve and a puncture needle. When in use, the puncture needle is inserted into the puncture sleeve, and then the user holds the rear end and exerts force, and the tip of the front end of the puncture needle is used to squeeze open the skin tissue and enter the abdominal cavity.

[0003] The puncture needles currently available on the market can be divided into non-knife type and knife type. The non-knife type puncture needle has a plastic blade, which squeezes open the tissue instead of cutting it, and has relatively little damage to the tissue, but the blade is too blunt, and a relatively large force is required to successfully penetrate during puncture. The knife type puncture needle has a stainless steel blade, and it enters the abdominal cavity by cutting the tissue during puncture. Although the puncture is more labor-saving than the non-knife type, because the blade is too sharp, it is difficult to control the puncture force, and problems such as incisional hernia, fascia and organ damage may occur during puncture. Summary of the Invention

[0004] The purpose of the present invention is to provide a radiofrequency wave puncture needle to solve the problems that the existing non-knife type puncture needle is laborious during puncture, and the puncture force of the knife type puncture needle is difficult to control, and incisional hernia, fascia and organ damage may occur during puncture.

[0005] According to an embodiment of the present invention, there is provided a radiofrequency wave puncture needle, including a radiofrequency knife, an electrode mechanism and an elastic movable mechanism;

[0006] The radiofrequency knife includes a knife body and a hollow knife shell, and the knife body is located inside the knife shell; the elastic movable mechanism is connected to one end of the knife shell;

[0007] The electrode mechanism includes a base, and a first electrode body, a second electrode body and a third electrode body are arranged at intervals on the base; the first ends of the first electrode body and the second electrode body are respectively used for connecting to a controller, the first end of the third electrode body is connected to the knife body, and the second end of the third electrode body is used for connecting to a radiofrequency wave generator;

[0008] The knife housing can compress the elastic moving mechanism to make the knife body extend from the knife housing, and make the second ends of the first electrode body and the second electrode body contact each other, so that the controller obtains a first control instruction to control the radio frequency wave generator to emit radio frequency waves through the knife body; the elastic mechanism can push the knife housing to move away from the first electrode body and the second electrode body, so that the second ends of the first electrode body and the second electrode body are separated, so that the controller obtains a second control instruction to control the radio frequency wave generator to stop emitting radio frequency waves.

[0009] Specifically, the elastic moving mechanism includes a housing and an elastic component arranged in the housing;

[0010] The top end of the housing is connected to the base, one end of the knife housing extends into the housing from the bottom opening of the housing and is connected to the elastic component, a trigger part is arranged on the outer peripheral wall of the elastic component, the second ends of the first electrode body and the second electrode body extend into the housing, and the trigger part can move driven by the elastic component to make the second ends of the first electrode body and the second electrode body contact or separate.

[0011] Specifically, the elastic component includes a hollow first limiting part, a hollow second limiting part and a hollow elastic part; the first limiting part is connected to the second limiting part through the elastic part, and the first limiting part abuts against the base, the second limiting part abuts against the bottom wall of the housing, and the trigger part is arranged on the outer peripheral wall of the second limiting part;

[0012] One end of the knife housing extending into the housing is connected to the second limiting part; the knife body in the knife housing sequentially passes through the second limiting part, the elastic part and the first limiting part and then is connected to the second end of the third electrode body.

[0013] Specifically, the first limiting part is provided with a first anti-rotation part, the second limiting part is provided with a second anti-rotation part adapted to the first anti-rotation part, and the cooperation of the first anti-rotation part and the second anti-rotation part can prevent the first limiting part and the second limiting part from generating relative rotation in the circumferential direction.

[0014] Specifically, the first electrode body includes a first switch pin and a conductive elastic sheet connected to the first switch pin, the end of the first switch pin far from the conductive elastic sheet is the first end of the first electrode body, and the end of the conductive elastic sheet far from the first switch pin is the second end of the first electrode body;

[0015] The second electrode body includes a second switch pin and a conductor connected to the second switch pin. One end of the second switch pin away from the conductor is the first end of the second electrode body, and one end of the conductor away from the second switch pin is the second end of the second electrode body;

[0016] The conductive elastic sheet and the conductor are located inside the housing. The conductive elastic sheet is provided with a bending portion along the direction away from the conductor. The triggering portion is provided with a first recess adapted to the bending portion, and the bending portion is located above the first recess.

[0017] Specifically, a groove is provided at the bottom end of the third electrode body. The top end of the third electrode body is the first end of the third electrode body, and the inner wall of the groove is the second end of the third electrode body. The top end of the cutter body extends into the groove; a first through hole is provided in the side wall of the groove, and a clamping portion that can move along the side wall of the first through hole is inserted into the first through hole;

[0018] The base includes a locking portion provided with a second through hole and a cover body fastened to the locking portion. A clamping groove is provided on the inner wall of the second through hole. The bottom end of the third electrode body extends into the second through hole; an opening groove is provided at the outer edge of the cover body, and a protruding sliding buckle is provided at the outer circumference of the locking portion. When the sliding buckle slides circumferentially, the locking portion can drive the clamping groove to rotate circumferentially relative to the cover body together;

[0019] A third through hole is provided at the center of the cover body. The third through hole is a complete circular through hole composed of a first arc-shaped through hole and a second arc-shaped through hole. The radius of the first semi-arc-shaped through hole is greater than the curvature radius of the second arc-shaped through hole;

[0020] An outer diameter thickening portion is provided on the outer side wall of the third electrode body. The outer diameter thickening portion is provided with a notch corresponding to the second arc-shaped through hole. The size of the portion of the third electrode body corresponding to the notch is adapted to the size of the second arc-shaped through hole, and the size of the portion of the third electrode body corresponding to the outer diameter thickening portion is adapted to the size of the first arc-shaped through hole; when the third electrode body is assembled with the third through hole, the portion of the third electrode body corresponding to the outer diameter thickening portion is matched with the first arc-shaped through hole, and the portion of the third electrode body corresponding to the notch is matched with the second arc-shaped through hole to prevent the circumferential rotation and axial movement of the third electrode body relative to the cover body;

[0021] When the locking portion drives the clamping groove to rotate circumferentially relative to the cover body, the clamping groove can squeeze or loosen the clamping portion, so that the clamping portion moves on the inner wall of the first channel, thereby fixing or loosening the electric cutter body inserted into the groove.

[0022] Specifically, a stepped structure is provided on the side wall of the groove of the third electrode body, and a second recess adapted to the stepped structure is provided at the top end of the tool body. The cooperation between the stepped structure and the second recess can prevent the third electrode body and the tool body from rotating circumferentially.

[0023] Specifically, the tool body includes an electro-surgical rod and an electro-surgical head provided at the bottom of the electro-surgical rod, and the second recess is provided at the top end of the electro-surgical rod.

[0024] Specifically, the tool housing includes a rod sleeve, a connecting sleeve, and a sheath sleeve. One end of the connecting sleeve is connected to the rod sleeve, and the other end of the connecting sleeve is detachably connected to the sheath sleeve.

[0025] Specifically, an exhaust hole is provided on the connecting sleeve.

[0026] In an embodiment of the present invention, a radio frequency wave puncture needle is provided. When the tool housing is gently pressed downward while being aligned with the skin incision, the skin resistance pushes the tool housing to compress the elastic movable mechanism, so that the tool body extends out of the tool housing, and the second ends of the first electrode body and the second electrode body come into contact to generate a first control command. The controller obtains the first control command and controls the radio frequency wave generator to emit radio frequency waves through the tool body to ablate skin cells and achieve puncture cutting. When the tool body completely cuts through the skin and enters the body, the thrust generated by the compression deformation of the elastic movable mechanism causes the tool housing to move away from the first electrode body and the second electrode body, so that the second ends of the first electrode body and the second electrode body are separated to generate a second control command. The controller obtains the second control command and controls the radio frequency wave generator to stop emitting radio frequency waves. Therefore, the present invention only needs to apply a small force to press on the skin to perform skin puncture, and automatically stops working after completely cutting through the skin, which can not only achieve accurate puncture, but also avoid damaging tissues and blood vessels, and avoid problems such as fascia damage, hernia through the foramen, and organ damage. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is an overall structure diagram of a radio frequency wave puncture needle provided by an embodiment of the present invention;

[0029] Figure 2 It is Figure 1 a sectional view taken along line A-A of

[0030] Figure 3 is Figure 2 a partially enlarged view of;

[0031] Figure 4 is Figure 3 a perspective view of;

[0032] Figure 5 is the structural diagram of the tool body;

[0033] Figure 6 is Figure 5 a partially enlarged view of;

[0034] Figure 7 is the structural diagram of the tool body and the third electrode;

[0035] Figure 8 is the structural diagram of the tool sheath sleeve;

[0036] Figure 9 is Figure 2 a perspective view of;

[0037] Figure 10 is the structural diagram of the electrode mechanism;

[0038] Figure 11 is Figure 10 a top view of;

[0039] Figure 12 is Figure 11 an exploded view of;

[0040] Figure 13 is the structural diagram of the third electrode;

[0041] Figure 14 is Figure 13 a sectional view of;

[0042] Figure 15 is the structural diagram of the cover body;

[0043] Figure 16 is the assembly diagram of the cover body and the third electrode;

[0044] Figure 17 is the circuit schematic diagram of the present invention.

[0045] Among them, 1 - electrode mechanism, 11 - locking part, 111 - card slot, 112 - sliding buckle, 113 - second through hole, 12 - clamping part, 13 - first switch pin, 14 - second switch pin, 15 - third electrode body, 151 - stepped structure, 152 - groove, 153 - first through hole, 154 - notch, 155 - outer diameter thickening part, 16 - conductive elastic sheet, 161 - bending part, 17 - conductor, 18 - cover body, 181 - opening slot, 182 - first arc-shaped through hole, 183 - second arc-shaped through hole, 2 - elastic movable mechanism, 21 - outer shell, 22 - second anti-rotation part, 23 - first limit part, 24 - elastic part, 25 - second limit part, 26 - first anti-rotation part, 27 - trigger part, 271 - first depression, 3 - radiofrequency knife, 31 - electrocautery rod, 311 - second depression, 32 - rod sleeve, 321 - exhaust hole, 33 - connecting sleeve, 34 - sheath sleeve, 35 - electrocautery head, 4 - controller, 5 - radiofrequency wave generator, 6 - air switch. Detailed implementation manners

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] According to an embodiment of the present invention, as Figure 1 and Figure 2 shown, a radiofrequency wave puncture needle is provided, which includes a radiofrequency knife 3, an electrode mechanism 1 and an elastic movable mechanism 2; the radiofrequency knife 3 includes a knife body and a hollow knife shell, and the knife body is located inside the knife shell; the elastic movable mechanism 2 is connected to one end of the knife shell; the electrode mechanism 1 includes a base, and a first electrode body, a second electrode body and a third electrode body 15 which are arranged at intervals are penetrated through the base; the first ends of the first electrode body and the second electrode body are respectively used for connecting to the controller 4, the first end of the third electrode body 15 is connected to the knife body, and the second end of the third electrode body 15 is used for connecting to the radiofrequency wave generator; the knife shell can compress the elastic movable mechanism 2 to make the knife body extend out of the knife shell, and make the second ends of the first electrode body and the second electrode body contact each other, so that the controller 4 obtains a first control instruction to control the radiofrequency wave generator 5 to emit radiofrequency waves through the knife body; the elastic mechanism can push the knife shell to move in a direction away from the first electrode body and the second electrode body, so that the second ends of the first electrode body and the second electrode body are separated from each other, so that the controller 4 obtains a second control instruction to control the radiofrequency wave generator 5 to stop emitting radiofrequency waves.

[0048] Among them, the controller 4 can be a processing device such as a notebook or a server, which is not limited in this embodiment. For the convenience of medical staff to turn the controller 4 on and off, the controller 4 is connected to an air switch 6 arranged on the ground. When the medical staff steps on the air switch 6, the controller 4 is powered on to work; when the medical staff releases the air switch 6, the controller 4 is powered off and turned off.

[0049] In this embodiment, before puncture, the first ends of the first electrode body and the second electrode body of the controller 4 are connected, and the radio frequency wave generator 5 is connected to the second end of the third electrode body 15. Then the medical staff steps on the air switch 6, and the controller 4 is powered on to work. When the knife shell is gently pressed downward against the skin incision, the skin resistance pushes the knife shell to compress the elastic activity mechanism 2, so that the knife body extends out of the knife shell, and the second ends of the first electrode body and the second electrode body come into contact to generate a first control instruction. The controller 4 obtains the first control instruction and controls the radio frequency wave generator 5 to emit radio frequency waves through the knife body to ablate skin cells and achieve puncture cutting; when the knife body completely cuts through the skin and enters the body, the thrust generated by the compression deformation of the elastic activity mechanism 2 causes the knife shell to move away from the first electrode body and the second electrode body, so that the second ends of the first electrode body and the second electrode body are separated to generate a second control instruction. The controller 4 obtains the second control instruction and controls the radio frequency wave generator 5 to stop emitting radio frequency waves. The medical staff can release the air switch 6, and the controller 4 is powered off and turned off. Therefore, the present invention only needs to apply a small force to press on the skin to perform skin puncture, and after completely cutting through the skin, it automatically stops working, which can not only achieve accurate puncture, but also avoid damaging tissues and blood vessels, and avoid problems such as fascia damage, foramen hernia and organ damage.

[0050] In the above embodiment, as Figure 3 shown, the elastic activity mechanism 2 includes a housing 21 and an elastic component arranged in the housing 21; the top end of the housing 21 is connected to the base, one end of the knife shell extends into the housing 21 from the bottom opening of the housing 21 and is connected to the elastic component, and a trigger part 27 is arranged on the outer peripheral wall of the elastic component. The second ends of the first electrode body and the second electrode body extend into the housing, and the trigger part 27 can move under the drive of the elastic component to make the second ends of the first electrode body and the second electrode body contact or separate.

[0051] The connection between the top end of the housing 21 and the base can be a detachable connection, such as existing detachable connection methods such as snap connection. In this way, the elastic activity mechanism 2 can be separately disassembled and maintained, and can be reused, saving resources and reducing costs.

[0052] Specifically, as Figure 2 、 Figure 3 and Figure 4As shown, the elastic component includes a hollow first limiting portion 23, a hollow second limiting portion 25, and a hollow elastic member 24; the first limiting portion 23 is connected to the second limiting portion 25 through the elastic member 24, and the first limiting portion 23 abuts against the base, and the second limiting portion 25 abuts against the bottom wall of the housing 21; the triggering portion 27 is arranged on the outer peripheral wall of the second limiting portion 25; one end of the cutter housing extending into the housing 21 is connected to the second limiting portion 25; the cutter body in the cutter housing sequentially passes through the second limiting portion 25, the elastic member 24, and the first limiting portion 23 and then is connected to the second end of the third electrode body 15.

[0053] Wherein, the elastic member 24 can be a spring. The first limiting portion 23 and the second limiting portion 25 are provided with cavities for accommodating the elastic member 24 inside to prevent the elastic member 24 from shaking during the stretching and contracting process.

[0054] In this embodiment, when the cutter housing is gently pressed downward while being aligned with the skin incision, the skin resistance pushes the cutter housing, so that the cutter housing pushes the second limiting portion 25 to move towards the first limiting portion 23, and the second limiting portion 25 compresses the first spring, so that a relative movement is generated between the cutter housing and the cutter body, and the cutter body can extend out of the cutter housing.

[0055] In the above embodiment, as Figure 3 and Figure 4 shown, the first limiting portion 23 is provided with a first anti-rotation portion 26, and the second limiting portion 25 is provided with a second anti-rotation portion 22 adapted to the first anti-rotation portion 26. The cooperation between the first anti-rotation portion 26 and the second anti-rotation portion 22 can prevent the first limiting portion 23 and the second limiting portion 25 from generating relative rotation in the circumferential direction.

[0056] Wherein, the first anti-rotation portion 26 can be a slot structure arranged on the outer periphery of the first limiting portion 23, and the second anti-rotation portion 22 can be a tongue arranged on the second anti-rotation portion 22. The tongue is at least partially inserted into the slot structure, so that the first limiting portion 23 and the second limiting portion 25 can be prevented from generating relative rotation in the circumferential direction.

[0057] In the above embodiment, the first electrode body includes a first switch pin 13 and a conductive elastic sheet 16 connected to the first switch pin 13. One end of the first switch pin 13 away from the conductive elastic sheet 16 is the first end of the first electrode body, and one end of the conductive elastic sheet 16 away from the first switch pin 13 is the second end of the first electrode body; the second electrode body includes a second switch pin 14 and a conductor 17 connected to the second switch pin 14. One end of the second switch pin 14 away from the conductor 17 is the first end of the second electrode body, and one end of the conductor 17 away from the second switch pin 14 is the second end of the second electrode body; the conductive elastic sheet 16 and the conductor 17 are located inside the housing 21. The conductive elastic sheet 16 is provided with a bending portion 161 along the direction away from the conductor 17. The trigger portion 27 is provided with a first recess 271 adapted to the bending portion 161, and the bending portion 161 is located above the first recess 271.

[0058] In this embodiment, when the knife housing is aligned with the skin incision and gently pressed downward, the skin resistance pushes the knife housing, so that the knife housing pushes the second limiting portion 25 to compress the elastic member 24 and then move toward the first limiting portion 23, and also drives the trigger portion 27 to move toward the direction close to the conductive elastic sheet 16, so that the bending portion 161 enters into the first recess 271 of the trigger portion 27. In the process that the trigger portion 27 continues to move toward the first limiting portion 23 along with the second limiting portion 25, the trigger portion 27 pushes the conductive elastic sheet 16 to approach the conductor 17 until the conductive elastic sheet 16 contacts the conductor 17 to generate a first control signal, and at the same time, the knife body extends out of the knife housing. The bending portion 161 and the first recess 271 can increase the contact area between the conductive elastic sheet 16 and the trigger portion 27 to enhance the stability of the trigger portion 27 pushing the bending portion 161.

[0059] In the above embodiment, as Figures 10 to 16As shown, a groove 152 is provided at the bottom end of the third electrode body 15. The top end of the third electrode body 15 is the first end of the third electrode body 15, and the inner wall of the groove 152 is the second end of the third electrode body 15. The top end of the cutter body extends into the groove 152. A first through hole 153 is formed in the side wall of the groove 152, and a clamping portion 12 that can move along the side wall of the first through hole 153 is inserted into the first through hole 153. The base includes a locking portion 11 provided with a second through hole 113 and a cover body 18 that is fastened to the locking portion 11. A clamping groove 111 is provided on the inner wall of the second through hole 113, and the bottom end of the third electrode body 15 extends into the second through hole 113. An opening groove 181 is provided on the outer edge of the cover body 18, and a protruding sliding buckle 11 is provided on the outer circumference of the locking portion 11. When the sliding buckle 11 slides circumferentially, the locking portion 11 can drive the clamping groove 111 to rotate circumferentially relative to the cover body 18. A third through hole is provided at the center of the cover body 18. The third through hole is a complete circular through hole composed of a first arc-shaped through hole 182 and a second arc-shaped through hole 183. The radius of the first semi-arc-shaped through hole is greater than the curvature radius of the second arc-shaped through hole 183. An outer diameter thickening portion 155 is provided on the outer side wall of the third electrode body 15. A notch 154 is provided on the outer diameter thickening portion 155 corresponding to the second arc-shaped through hole 183. The size of the portion of the third electrode body 15 corresponding to the notch 154 is adapted to the size of the second arc-shaped through hole 183, and the size of the portion of the third electrode body 15 corresponding to the outer diameter thickening portion 155 is adapted to the size of the first arc-shaped through hole 182. When the third electrode body 15 is assembled with the third through hole, the portion of the third electrode body 15 corresponding to the outer diameter thickening portion cooperates with the first arc-shaped through hole 182, and the portion of the third electrode body 15 corresponding to the notch 154 cooperates with the second arc-shaped through hole 183 to prevent the circumferential rotation and axial movement of the third electrode body 15 relative to the cover body 18. When the locking portion 11 drives the clamping groove 111 to rotate circumferentially relative to the cover body 18, the clamping groove 111 can squeeze or release the clamping portion 12, so that the clamping portion 12 moves on the inner wall of the first channel, thereby fixing or releasing the electric knife body inserted into the groove 152.

[0060] In this embodiment, when using the radio frequency wave puncture needle, the top end of the knife body is inserted into the groove 152, and then the sliding buckle 112 of the locking part 11 is rotated to drive the clamping groove 111 to rotate circumferentially relative to the cover body 18 within the area defined by the opening groove 181 of the cover body 18. The clamping groove 111 squeezes the clamping part 12 to move along the inner wall of the second channel towards the groove 152, thereby fixing the knife body between the side wall of the groove 152 and the clamping part 12; when the knife body needs to be replaced, the locking part 11 is rotated to drive the clamping groove 111 to rotate circumferentially. The inner wall of the clamping groove 111 no longer squeezes the clamping part 12, increasing the movable space between the clamping part 12 and the groove 152, and the knife body is released and can be disengaged from the groove 152, thus realizing the detachable connection between the knife body and the third electrode 15. It is convenient to replace the knife body. Wherein, the clamping part 12 can be a ball, the side wall of the first through hole 153 is an arc structure, and the radius of curvature of the arc of the side wall of the first through hole 153 is greater than the radius of curvature of the ball, so as to ensure that the ball can move within the first through hole 153 and will not escape from the first through hole 153.

[0061] In the above embodiment, as Figure 5 , Figure 6 , Figure 7 shown, a stepped structure 151 is provided on the side wall of the groove 152 of the third electrode body 15, and a second recess 311 adapted to the stepped structure 151 is provided on the top end of the knife body. The cooperation between the stepped structure 151 and the second recess 311 can prevent the third electrode body 15 and the knife body from generating circumferential rotation.

[0062] Among them, the cooperation between the stepped structure 151 and the second recess 311 can prevent the third electrode body 15 and the knife body from generating circumferential rotation, and can limit the relative rotation between the third electrode body 15 and the knife body, realizing good circumferential rotation positioning.

[0063] In the above embodiment, as Figure 5 shown, the knife body includes an electric knife rod 31 and an electric knife head 35 provided at the bottom of the electric knife rod 31, and the second recess 311 is provided at the top end of the electric knife rod 31. Wherein, the electric knife head 35 can be a metal circular electric knife head 35, and both the electric knife rod 31 and the electric knife head 35 can be made of stainless steel, or can be made of tungsten metal or other metals that are harmless to the human body and have good electrical conductivity.

[0064] In the above embodiment, as Figure 8 and Figure 9 shown, the knife shell includes a knife rod sleeve 32, a connecting sleeve 33 and a knife sheath sleeve 34. One end of the connecting sleeve 33 is connected to the knife rod sleeve 32, and the other end of the connecting sleeve 33 is detachably connected to the knife sheath sleeve 34. Wherein, a bayonet is provided on the peripheral wall of the connecting sleeve 33, and an elastic claw is provided on the knife sheath sleeve 34. By using the cooperation between the bayonet and the elastic claw, the detachable connection between the connecting sleeve 33 and the knife sheath sleeve 34 is realized.

[0065] In the above embodiments, as Figure 9 shown, the connecting sleeve 33 is provided with an exhaust hole 321, and the exhaust hole 321 can discharge the smoke generated when ablating cells.

[0066] An embodiment of the present invention provides a radio frequency wave puncture needle. When the knife shell is gently pressed downward against the skin incision, the skin resistance pushes the knife shell to compress the elastic movable mechanism 2, so that the knife body extends out of the knife shell, and the second ends of the first electrode body and the second electrode body come into contact to generate a first control instruction. The controller 4 obtains the first control instruction and controls the radio frequency wave generator 5 to emit radio frequency waves through the knife body to ablate skin cells and achieve puncture cutting. When the knife body completely cuts through the skin and enters the body, the thrust generated by the compression deformation of the elastic movable mechanism 2 causes the knife shell to move away from the first electrode body and the second electrode body, so that the second ends of the first electrode body and the second electrode body are separated to generate a second control instruction. The controller 4 obtains the second control instruction and controls the radio frequency wave generator 5 to stop emitting radio frequency waves. Therefore, the present invention only needs to apply a small force to press on the skin to perform skin puncture, and automatically stops working after completely cutting through the skin, which can not only achieve accurate puncture, but also avoid damaging tissues and blood vessels, and avoid problems such as fascia damage, foramen hernia and organ damage.

[0067] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0068] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A radio frequency electric wave puncture needle, characterized in that, It includes a radiofrequency knife (3), an electrode mechanism (1), and an elastic movable mechanism (2); The radiofrequency knife (3) includes a knife body and a hollow knife shell, and the knife body is located inside the knife shell; the elastic movable mechanism (2) is connected to one end of the knife shell; The electrode mechanism (1) includes a base, and a first electrode body, a second electrode body, and a third electrode body (15) which are arranged at intervals and penetrate through the base; the first ends of the first electrode body and the second electrode body are respectively used for connecting to a controller (4), the first end of the third electrode body (15) is connected to the knife body, and the second end of the third electrode body (15) is used for connecting to a radiofrequency wave generator; The knife shell can compress the elastic movable mechanism (2) to make the knife body extend out of the knife shell, and make the second ends of the first electrode body and the second electrode body contact each other, so that the controller (4) obtains a first control instruction to control the radiofrequency wave generator (5) to emit radiofrequency waves through the knife body; the elastic movable mechanism can push the knife shell to move away from the first electrode body and the second electrode body, so that the second ends of the first electrode body and the second electrode body are separated from each other, so that the controller (4) obtains a second control instruction to control the radiofrequency wave generator (5) to stop emitting radiofrequency waves; The controller (4) is connected to an air switch (6) arranged on the ground; A groove (152) is provided at the bottom end of the third electrode body (15), the top end of the third electrode body (15) is the first end of the third electrode body (15), the inner wall of the groove (152) is the second end of the third electrode body (15), and the top end of the knife body extends into the groove (152); a first through hole (153) is provided on the side wall of the groove (152), and a clamping part (12) that can move along the side wall of the first through hole (153) is arranged in the first through hole (153); The base includes a locking part (11) provided with a second through hole (113) and a cover body (18) buckled with the locking part (11), a clamping groove (111) is provided on the inner wall of the second through hole (113), and the bottom end of the third electrode body (15) extends into the second through hole (113); an opening groove (181) is provided on the outer edge of the cover body (18), and a protruding sliding buckle (112) is provided on the outer periphery of the locking part (11). When the sliding buckle (112) slides circumferentially, the locking part (11) can drive the clamping groove (111) to rotate circumferentially relative to the cover body (18); A third through hole is provided at the center of the cover body (18), and the third through hole is a complete circular through hole composed of a first circular arc through hole (182) and a second circular arc through hole (183), and the radius of the first circular arc through hole is greater than the curvature radius of the second circular arc through hole (183); An outer diameter thickening portion (155) is provided on the outer side wall of the third electrode body (15). A notch (154) is provided on the outer diameter thickening portion (155) corresponding to the second arc-shaped through hole (183). The size of the portion of the third electrode body (15) corresponding to the notch (154) is adapted to the size of the second arc-shaped through hole (183), and the size of the portion of the third electrode body (15) corresponding to the outer diameter thickening portion is adapted to the size of the first arc-shaped through hole (182); when the third electrode body (15) is assembled with the third through hole, the portion of the third electrode body (15) corresponding to the outer diameter thickening portion (155) cooperates with the first arc-shaped through hole (182), and the portion of the third electrode body (15) corresponding to the notch (154) cooperates with the second arc-shaped through hole (183) to prevent circumferential rotation and axial movement of the third electrode body (15) relative to the cover body (18). When the locking portion (11) drives the card slot (111) to rotate circumferentially relative to the cover body (18) together, the card slot (111) can squeeze or loosen the clamping portion (12), so that the clamping portion (12) moves on the inner wall of the first channel, thereby fixing or loosening the tool body inserted into the groove (152).

2. The radio frequency electric wave puncture needle according to claim 1, wherein The elastic movable mechanism (2) includes a housing (21) and an elastic component provided in the housing (21). The top end of the housing (21) is connected to the base. One end of the tool housing extends into the housing (21) through the bottom opening of the housing (21) and is connected to the elastic component. A trigger portion (27) is provided on the outer peripheral wall of the elastic component. The second ends of the first electrode body and the second electrode body extend into the housing. The trigger portion (27) can move under the drive of the elastic component, so that the second ends of the first electrode body and the second electrode body are in contact or separated.

3. The radio frequency electric wave puncture needle according to claim 2, wherein The elastic component includes a hollow first limiting portion (23), a hollow second limiting portion (25) and a hollow elastic member (24); the first limiting portion (23) is connected to the second limiting portion (25) through the elastic member (24), and the first limiting portion (23) abuts against the base, and the second limiting portion (25) abuts against the bottom wall of the housing (21). The trigger portion (27) is provided on the outer peripheral wall of the second limiting portion (25). One end of the tool housing extending into the housing (21) is connected to the second limiting portion (25); the tool body in the tool housing sequentially passes through the second limiting portion (25), the elastic member (24) and the first limiting portion (23) and then is connected to the second end of the third electrode body (15).

4. The radio frequency electric wave puncture needle according to claim 3, characterized in that, A first anti-rotation portion (26) is provided on the first limiting portion (23), and a second anti-rotation portion (22) adapted to the first anti-rotation portion (26) is provided on the second limiting portion (25). The cooperation between the first anti-rotation portion (26) and the second anti-rotation portion (22) can prevent relative circumferential rotation between the first limiting portion (23) and the second limiting portion (25).

5. The radio frequency electric wave puncture needle according to claim 2, wherein The first electrode body includes a first switch pin (13) and a conductive elastic sheet (16) connected to the first switch pin (13). One end of the first switch pin (13) away from the conductive elastic sheet (16) is the first end of the first electrode body, and one end of the conductive elastic sheet (16) away from the first switch pin (13) is the second end of the first electrode body; The second electrode body includes a second switch pin (14) and a conductor (17) connected to the second switch pin (14). One end of the second switch pin (14) away from the conductor (17) is the first end of the second electrode body, and one end of the conductor (17) away from the second switch pin (14) is the second end of the second electrode body; The conductive elastic sheet (16) and the conductor (17) are located inside the housing (21). The conductive elastic sheet (16) is provided with a bending portion (161) along the direction away from the conductor (17). The trigger portion (27) is provided with a first recess (271) adapted to the bending portion (161), and the bending portion (161) is located above the first recess (271).

6. The radio frequency electric wave puncture needle according to claim 5, wherein, The side wall of the groove (152) of the third electrode body (15) is provided with a stepped structure (151). The top end of the tool body is provided with a second recess (311) adapted to the stepped structure (151). The cooperation between the stepped structure (151) and the second recess (311) can prevent the third electrode body (15) and the tool body from generating circumferential rotation.

7. The radio frequency wave puncture needle according to claim 6, wherein, The tool body includes an electric knife rod (31) and an electric knife head (35) provided at the bottom of the electric knife rod (31). The second recess (311) is provided at the top end of the electric knife rod (31).

8. The radio frequency wave puncture needle according to claim 1, characterized in that, The knife housing includes a knife rod sleeve (32), a connecting sleeve (33) and a knife sheath sleeve (34). One end of the connecting sleeve (33) is connected to the knife rod sleeve (32), and the other end of the connecting sleeve (33) is detachably connected to the knife sheath sleeve (34).

9. The radio frequency electric wave puncture needle according to claim 8, characterized in that, The connecting sleeve (33) is provided with an exhaust hole (321).

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