An electrosurgical pen capable of simultaneous telescoping and blade replacement

Abstract

The present invention relates to the technical field of medical devices, and particularly relates to an electrosurgical pen capable of simultaneously telescoping and replacing the tip; it includes a pen body, a telescopic electrode, and a tip. The pen body is provided with an electrode installation part for installing the telescopic electrode. A retainer installation groove is formed on the electrode installation part. The electrode retainer is arranged in the retainer installation groove. The telescopic electrode is installed inside the pen body through the electrode retainer and extends out. The tip is arranged at the head of the telescopic electrode. The telescopic electrode of the electrosurgical pen can be extended and shortened according to the depth of the surgical site. The tip can also be replaced with other tips of different shapes and different length dimensions as needed. Both the telescopic electrode and the tip of the electrosurgical pen can be replaced. During the operation, the tip of the electrosurgical pen can be quickly replaced according to the actual operation requirements to complete different operation tasks, making the surgical process smoother and improving the surgical efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to an electrosurgical pen capable of simultaneously telescoping and replacing the blade tip. Background Art

[0002] An electrosurgical pen is a device commonly used in medical surgeries, usually composed of a blade tip, a handle, and a connecting wire. During medical surgeries, it is mainly used for cutting tissues, hemostasis and blood coagulation, tissue coagulation, etc. The electrosurgical pen uses the heat generated by high-frequency current to achieve cutting, hemostasis, and coagulation of tissues. When the blade tip of the electrosurgical pen touches the tissue, the high-frequency current is transmitted through the blade tip to the tissue, causing the water in the tissue to rapidly evaporate and the protein to denature and coagulate, thereby achieving the effects of hemostasis and coagulation. By adjusting the output power and working mode of the electrosurgical pen, the speed and depth of cutting and blood coagulation can be controlled to meet the requirements of different surgeries.

[0003] During actual surgeries, different-shaped and different-sized blade tips are often selected according to actual needs, such as operations on different tissues and different parts. And during deep surgeries, the extended length of the blade tip needs to be adjusted according to the depth of the surgical site. Therefore, when it is necessary to change the shape and function of the blade tip during actual surgeries, an electrosurgical pen that can only telescope cannot be quickly replaced. Usually, the entire electrosurgical pen needs to be replaced. And in the case where the extended length of the blade tip needs to be adjusted, a blade tip that can only be replaced by plugging and unplugging cannot be replaced with a telescopic blade tip. Each electrosurgical pen body is usually fixedly configured and cannot be interchanged between telescopic blade tips and plug-and-unplug blade tips, resulting in poor versatility and low surgical operation efficiency, which affects the final result of the surgery. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the background art and provide an electrosurgical pen capable of simultaneously telescoping and replacing the blade tip, which can quickly replace the blade tip of the electrosurgical pen according to actual operation requirements during the surgery to complete different operation tasks, making the surgical process smoother and improving the surgical efficiency.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions:

[0006] An electrosurgical pen capable of simultaneous telescoping and cutter head replacement, comprising a pen body, a telescopic electrode and a cutter head. An electrode mounting portion is provided on the pen body at the position where the telescopic electrode is installed. A retainer mounting groove is formed on the electrode mounting portion. An electrode retainer is disposed in the retainer mounting groove. The telescopic electrode is installed inside the pen body through the electrode retainer and extends out. The cutter head is disposed at the head of the telescopic electrode. The telescopic electrode of the electrosurgical pen can be extended and shortened according to the depth of the surgical site. The cutter head can also be replaced with other cutter heads of different shapes and different length dimensions as needed. Both the telescopic electrode and the cutter head of the electrosurgical pen are replaceable.

[0007] Preferably, a conductive tube is provided inside the pen body. The conductive tube has a hollow structure. The outer wall of the electrode of the telescopic electrode is in direct contact with the inner wall of the conductive tube. After the electrosurgical pen is powered on, the current reaches the conductive tube and can be transmitted to the telescopic electrode through the conductive tube. The conductive tube of the electrosurgical pen can receive the high-frequency current transmitted by the PCB board. The diameter of the telescopic electrode is thicker than that of the plug-in electrode. The telescopic electrode is inserted into the conductive tube after passing through the electrode retainer, and the outer wall of the telescopic electrode can be in direct contact with the inner wall of the conductive tube, making the conduction of the current smoother.

[0008] Preferably, an electrode insulating layer is further provided on the electrode of the telescopic electrode extending outside the pen body. The electrode insulating layer directly extends away from the head of the telescopic electrode by a length of 2-10 mm. The electrode portion of the telescopic electrode extending outside the pen body is also coated with an electrode insulating layer, which can prevent the doctor from being scalded by the high-frequency current when accidentally touching the electrode during the operation, ensuring the safety of the medical staff's operation and improving the accuracy of the operation at the same time.

[0009] Preferably, the edge size of the knife tip of the scalpel is 0.05 - 0.1 mm. When the electrosurgical pen is not activated during clinical use, the knife tip will not cut the skin due to being too sharp. The design of the knife tip edge size allows the discharge of the knife tip to be more concentrated, so that electrocision and electrocoagulation of the operation can be achieved under low power conditions; a temperature sensor is also provided at the position of the telescopic electrode close to the knife tip, which can collect the temperature of the cut area in real time when the electrosurgical pen is cutting; the edge size design of the knife tip makes the knife tip sharp but not overly sharp. When medical staff accidentally touches the edge of the knife tip, the skin will not be scratched by the edge of the knife tip. At the same time, the edge design of the knife tip can make the discharge of the knife tip of the electrosurgical pen more concentrated, so as to achieve electrocision and electrocoagulation of the operation process with a lower current power. And the low power causes less damage to the patient, the patient's postoperative recovery time is faster, greatly reducing the pain of the patient after the operation. At the same time, a temperature sensor is also provided at the position of the electrode close to the knife tip, which can monitor the temperature of the wound throughout the operation process in real time, ensuring that the temperature during the operation process is controlled within the specified range, avoiding secondary damage to the patient caused by thermal damage or carbonization of biological tissue due to high temperature, and improving the safety and accuracy of the operation process.

[0010] Preferably, the electrode holder is designed as a ring-shaped rubber ring structure, made of silicone material with a relatively high coefficient of friction. A number of engaging teeth are provided on the inner wall of the electrode holder. The electrode holder and the telescopic electrode are installed by interference fit. The electrode holder can provide sufficient insertion and extraction force for the telescopic electrode while ensuring the stability of the knife tip and the telescopic electrode and being compatible with knife tips and telescopic electrodes of different diameters; the electrode holder is a ring-shaped rubber ring, fixedly installed in the holder installation groove of the electrode installation part. There are also engaging teeth inside the ring-shaped rubber ring to further improve the friction force of the electrode holder through mechanical engagement. At the same time, the electrode holder and the outer wall of the telescopic electrode are installed by interference fit, so that the telescopic electrode can be firmly installed in the electrode holder and will not fall off easily. At the same time, medical staff can easily pull out the telescopic electrode for replacement with a little force during use. The electrode holder does not affect electrode replacement while providing sufficient insertion and extraction force, improving the reliability of electrode replacement and increasing the efficiency of electrode replacement.

[0011] Preferably, it is characterized in that a PCB board is arranged inside the pen body. The PCB board is arranged above the conductive tube. A conductive installation groove is formed on the PCB board. The PCB board and the conductive tube are fixedly connected and conducted through a conductive connector. The current on the PCB board is transmitted to the conductive tube below through the conductive connector. Since the conductive tube and the telescopic electrode are of a separable structure, the extraction and replacement of the telescopic electrode will not affect the internal structure change of the electrosurgical pen. And the current on the conductive tube can be transmitted to the telescopic electrode, realizing that the electrosurgical pen can not only work normally for electrocision and electrocoagulation, but also realize the telescoping, plugging and unplugging replacement of the electrode without changing the internal structure.

[0012] Preferably, the conductive connector is of a hoop clamping or crimping clamping structure, including a square clamping end and a circular clamping end. The square clamping end is clamped and fixed with the conductive installation groove, and the square clamping end can also be fixed on the PCB board through a rivet structure. The circular clamping end is clamped and fixed with the outer wall of the conductive tube. The current on the PCB board is transmitted to the conductive tube through the conductive connector and finally transmitted to the telescopic electrode and the tool head. The conductive tube not only has a conductive function, but also can provide a guiding function for the telescopic electrode when the telescopic electrode is inserted into the pen body, so that the electrode will not deviate. The conductive connector uses a hoop clamping structure. The square clamping end above the conductive connector is fixedly connected with the PCB board, and the circular clamping end below is a circular hoop design. Since the conductive connector is made of an elastic conductive material, the elastic force provided by the hoop can clamp and fix the conductive tube. At the same time, the conductive connector can also connect the PCB board and the conductive tube, enabling the current to be transmitted smoothly.

[0013] Preferably, a pluggable and replaceable plug-in tool head can also be installed on the electrode installation part of the pen body. The plug-in tool head includes a plug-in connector and a plug-in electrode. The plug-in electrode is fixedly installed on the plug-in connector. The plug-in connector is installed on the electrode installation part through the electrode fixator. In addition to installing a replaceable telescopic electrode, the electrosurgical pen can also install a tool head that does not need to be telescopic and needs to be fixed during use. The plug-in electrode on the plug-in tool head is fixedly installed on the plug-in connector, and a tool head for surgery is also installed at the head of the plug-in electrode. The electrosurgical pen can replace both the telescopic electrode and the fixed plug-in electrode at the same time, or replace the tool head, without the need to replace the entire surgical instrument like a traditional electrosurgical pen, and can quickly adapt to a complex surgical environment, making the surgical process smoother and improving the surgical efficiency.

[0014] Preferably, a pen body stop portion for preventing the plug-in cutter head from rotating is further provided on the electrode mounting portion. The pen body stop portion is a keyway stop or a stop plane stop structure, and a connector stop portion corresponding to the structure of the pen body stop portion is further provided on the plug-in connector; during the operation, a cutter head that does not rotate is required. The plug-in connector is provided with a connector stop portion, and the inner hexagonal plane is used as the stop plane to prevent the plug-in cutter head from rotating after being installed on the pen body of the electrosurgical pen, making the electrosurgical pen more reliable during the operation and the operation process more accurate and efficient.

[0015] Preferably, the cross-sectional diameter of the plug-in electrode is smaller than the cross-sectional diameter of the telescopic electrode. An elastic pressing piece facing one end of the electrode mounting portion is further provided on the square clamping end of the conductive clamping connector. The part where the elastic pressing piece is connected to the square clamping end is a straight-edge connecting end, and the end far from the square clamping end is an arc pressing piece end. The arc pressing piece end can be bent and deformed under the pressure of the pen body housing and contact the plug-in electrode, so that the current of the PCB board can reach the plug-in electrode through the elastic pressing piece; the plug-in electrode is fixedly installed in the plug-in connector and inserted into the pen body. The telescopic electrode is directly inserted into the pen body. Therefore, the diameter size of the plug-in electrode is smaller than that of the telescopic electrode, resulting in that the plug-in electrode cannot directly contact the conductive tube, so the current on the conductive tube cannot be transmitted to the plug-in electrode; however, an elastic pressing piece extending outward is provided at one end of the conductive clamping connector facing the electrode. The elastic pressing piece is made of beryllium copper, a conductive material with good elastic performance. When the plug-in electrode is inserted into the pen body, the arc pressing piece end of one end of the elastic pressing piece will contact and deform under the extrusion of the plug-in electrode, so that the arc pressing piece end always firmly contacts the plug-in electrode. The current on the PCB board can be transmitted to the plug-in electrode through the elastic pressing piece on the conductive clamping connector, enabling the plug-in electrode to work normally; and because the arc pressing piece end of the elastic pressing piece has strong elastic performance, when the thicker telescopic electrode is inserted, the elastic pressing piece will only deform more and will not interfere with the installation of the telescopic electrode, improving the versatility of the pen body of the electrosurgical pen and making the adaptability of the electrosurgical pen better.

[0016] In summary, the beneficial effects of the present invention are as follows:

[0017] 1. For the electrosurgical pen capable of simultaneously telescoping and replacing the cutter head according to the present invention, the pen body of the electrosurgical pen can simultaneously replace the telescopic electrode and the plug-in and fixed electrode, and can also choose to replace the cutter head type. The operation is convenient, and the electrode and cutter head of the electrosurgical pen can be quickly replaced. There is no need to replace the entire surgical instrument like a traditional electrosurgical pen, and it can be quickly adapted to a complex surgical environment, making the surgical process more streamlined and improving the surgical efficiency.

[0018] 2. For an electrosurgical pen capable of simultaneous telescoping and cutter head replacement according to the present invention, an electrode holder is installed on the electrode mounting portion of the pen body of the electrosurgical pen. The electrode holder is made of a rubber ring with a relatively high coefficient of friction, and bite teeth for further increasing the friction force are also provided inside the rubber ring. After the telescoping electrode and the plug-and-play electrode are installed on the electrode holder, they will not fall off easily. The electrode holder can provide sufficient insertion and extraction force without affecting electrode replacement, improving the reliability of electrode replacement and increasing the efficiency of electrode replacement at the same time;

[0019] 3. For an electrosurgical pen capable of simultaneous telescoping and cutter head replacement according to the present invention, a conductive tube is provided inside the pen body. The conductive tube is fixedly connected to the PCB board through a conductive connector, and the telescoping electrode is in direct contact with the inner wall of the conductive tube, enabling the high-frequency current on the PCB board to be transmitted to the telescoping electrode. Since the conductive tube and the telescoping electrode are of a separable structure, the extraction and replacement of the telescoping electrode will not affect the internal structure change of the electrosurgical pen, realizing that the electrosurgical pen can work normally and the electrode can be telescoped and replaced by plugging and unplugging without changing the internal structure;

[0020] 4. For an electrosurgical pen capable of simultaneous telescoping and cutter head replacement according to the present invention, an elastic pressing piece extending outward is provided at one end of the conductive connector facing the electrode. The diameter of the plug-and-play electrode is smaller than that of the telescoping electrode and cannot be in direct contact with the conductive tube. Therefore, the arc pressing end of the elastic pressing piece will contact and deform under the extrusion of the plug-and-play electrode, making the arc pressing end always firmly contact the plug-and-play electrode, enabling the plug-and-play electrode to work normally. And after the telescoping electrode is inserted, the elastic pressing piece will only deform more and will not interfere with the installation of the telescoping electrode, improving the versatility of the pen body of the electrosurgical pen and making the adaptability of the electrosurgical pen better;

[0021] 5. For an electrosurgical pen capable of simultaneous telescoping and cutter head replacement according to the present invention, a pen body stop portion is further provided on the electrode mounting portion of the pen body, which can cooperate with the connector stop portion on the plug-and-play cutter head, so that the cutter head will not rotate during use, can be better applied to some special surgical situations, making the electrosurgical pen more reliable during the surgical process and the surgical process more accurate and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the internal structure of the electrosurgical pen of the present invention;

[0023] Figure 2 is a schematic diagram of the overall structure of the electrosurgical pen of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the electrode mounting portion of the present invention;

[0025] Figure 4 is a schematic diagram of the connection structure between the telescoping electrode and the conductive tube of the present invention;

[0026] Figure 5 is a schematic diagram of the telescopic electrode structure of the present invention;

[0027] Figure 6 is a schematic diagram of the electrode holder structure of the present invention;

[0028] Figure 7 is a schematic diagram of the conductive connector structure of the present invention;

[0029] Figure 8 is a schematic diagram of the downward pressure contact end conductive connector structure of the present invention;

[0030] Figure 9 is a schematic diagram of the connection structure of the conductive connector of the present invention;

[0031] Figure 10 is a schematic diagram of the internal structure of the pluggable knife head electrocautery pen of the present invention;

[0032] Figure 11 is a schematic diagram of the installation structure of the pluggable knife head of the present invention.

[0033] Markings in the figure: 1 - pen body, 11 - electrode installation part, 12 - holder installation groove, 13 - pen body stop part, 14 - conductive tube, 15 - PCB board, 16 - conductive installation groove, 2 - telescopic electrode, 21 - electrode insulation layer, 22 - temperature measurement sensor, 3 - knife head, 31 - cutting edge, 4 - electrode holder, 41 - engaging teeth, 5 - conductive connector, 51 - square connector end, 52 - annular connector end, 53 - elastic pressing piece, 531 - straight edge connection end, 532 - arc pressing piece end, 54 - downward pressure contact end, 6 - pluggable knife head, 61 - pluggable connector, 62 - pluggable electrode, 63 - connector stop part. Detailed implementation manners

[0034] The following specific embodiments are only explanations of the present invention and are not limitations thereof. Those skilled in the art can make modifications without creative contributions to this embodiment after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0035] The present invention will be described in detail below with reference to the accompanying drawings by way of examples.

[0036] Example 1

[0037] According to Figures 1 to 3As shown in the figure, an electrosurgical pen that can be telescoped and the tip can be replaced includes a pen body 1, a telescopic electrode 2, and a tip 3. The pen body 1 is provided with an electrode mounting portion 11 at the position where the telescopic electrode 2 is installed. A holder mounting groove 12 is opened on the electrode mounting portion 11. The electrode holder 4 is arranged in the holder mounting groove 12. The telescopic electrode 2 is installed inside the pen body 1 through the electrode holder 4 and extends out. The tip 3 is arranged at the head of the telescopic electrode 2. The telescopic electrode 2 of the electrosurgical pen can be extended and shortened according to the depth of the surgical site. The tip 3 can also be replaced with other tips of different shapes and different length dimensions. Both the telescopic electrode 2 and the tip 3 of the electrosurgical pen can be replaced.

[0038] According to Figure 1 As shown in the figure, a conductive tube 14 is arranged inside the pen body 1. The conductive tube 14 is of a hollow structure. The outer wall of the electrode of the telescopic electrode 2 is in direct contact with the inner wall of the conductive tube 14. After the electrosurgical pen is powered on, the current reaches the conductive tube 14 and can be transmitted to the telescopic electrode 2 through the conductive tube 14. The conductive tube 14 of the electrosurgical pen can receive the high-frequency current transmitted by the PCB board 15. The diameter of the telescopic electrode 2 is thicker than that of the plug-in electrode 62. After passing through the electrode holder 4, the telescopic electrode 2 is inserted into the conductive tube 14, and the outer wall of the telescopic electrode 2 can be in direct contact with the inner wall of the conductive tube 14, making the conduction of the current smoother.

[0039] According to Figure 1 、 Figure 5 As shown in the figure, an electrode insulation layer 21 is also arranged on the electrode of the telescopic electrode 2 extending outside the pen body 1. The electrode insulation layer 21 directly extends 2 - 10 mm from the head of the telescopic electrode 2. The electrode part of the telescopic electrode 2 extending outside the pen body 1 is also coated with the electrode insulation layer 21, which can prevent the doctor from being scalded by the high-frequency current when accidentally touching the electrode during the operation, ensuring the safety of the medical staff's operation and improving the accuracy of the operation at the same time.

[0040] According to Figure 5As shown, the edge dimension of the blade 31 of the knife head 3 is 0.05 - 0.1 mm. When the electrosurgical pen is not activated during clinical use, the knife head 3 will not cut the skin due to being too sharp. The design of the size of the blade 31 of the knife head 3 can make the discharge of the knife head 3 more concentrated, so that electrocision and electrocoagulation of the operation can be achieved under low-power conditions; a temperature sensor 22 is also provided at the position of the telescopic electrode 2 close to the knife head 3, which can collect the temperature of the cutting area in real time when the electrosurgical pen is cutting; the design of the size of the blade 31 of the knife head 3 makes the knife head 3 sharp but not overly sharp. When medical staff accidentally touches the blade 31, the skin will not be scratched by the blade 31. At the same time, the design of the blade 31 of the knife head 3 can make the discharge of the knife head 3 of the electrosurgical pen more concentrated, so as to achieve electrocision and electrocoagulation of the operation process with a relatively low current power. And the low power causes less damage to the patient, and the patient's postoperative recovery time is faster, greatly reducing the pain of the patient after the operation. At the same time, a temperature sensor 22 is also provided at the position of the electrode close to the knife head 3, which can monitor the temperature of the wound in real time throughout the operation process, ensure that the temperature during the operation process is controlled within the specified range, avoid secondary damage to the patient caused by thermal damage of tissues due to high temperature or carbonization of biological tissues, and improve the safety and accuracy of the operation process.

[0041] According to Figure 1 、 Figure 6 As shown, the electrode holder 4 is designed as a ring-shaped rubber ring structure and is made of silicone material with a relatively high coefficient of friction. A number of engaging teeth 41 are provided on the inner wall of the electrode holder 4. The electrode holder 4 and the telescopic electrode 2 are installed with an interference fit. The electrode holder 4 can provide sufficient insertion and extraction force for the telescopic electrode 2 while ensuring the stability of the knife head and the telescopic electrode and being compatible with knife heads and telescopic electrodes of different diameters; the electrode holder 4 is a ring-shaped rubber ring and is fixedly installed in the holder installation groove 12 of the electrode installation part 11. An engaging tooth 41 is also provided inside the ring-shaped rubber ring to further improve the friction force of the electrode holder 4 through mechanical engagement. At the same time, the electrode holder 4 and the outer wall of the telescopic electrode 2 are installed with an interference fit, so that the telescopic electrode 2 can be stably installed in the electrode holder 4 and will not fall off easily. At the same time, medical staff can easily pull out the telescopic electrode 2 for replacement with a little force during use. The electrode holder 4 does not affect electrode replacement while providing sufficient insertion and extraction force, improving the reliability of electrode replacement and increasing the efficiency of electrode replacement.

[0042] According to Figure 4As shown, a PCB board 15 is disposed inside the pen body 1. The PCB board 15 is disposed above the conductive tube 14. A conductive mounting groove 16 is formed on the PCB board 15. The PCB board 15 and the conductive tube 14 are fixedly connected and conducted through a conductive connector 5. The current on the PCB board 15 is transmitted to the conductive tube 14 below through the conductive connector 5. Since the conductive tube 14 and the telescopic electrode 2 are of a separated structure, the pulling out and replacement of the telescopic electrode 2 will not affect the change of the internal structure of the electrocautery pen. And the current on the conductive tube 14 can be transmitted to the telescopic electrode 2, realizing that the electrocautery pen can not only work normally for electrosection and electrocoagulation, but also realize the telescoping, plugging and unplugging replacement of the electrode without changing the internal structure.

[0043] According to Figure 7 、 Figure 8 As shown, the conductive connector 5 is of a hoop clamping or crimping clamping structure, including a square clamping end 51 and a circular clamping end 52. The square clamping end 51 is clamped and fixed with the conductive mounting groove 16. The square clamping end 51 can also be fixed on the PCB board 15 through a rivet structure. The circular clamping end 52 is clamped and fixed with the outer wall of the conductive tube 14. The circular clamping end 52 can also be replaced by a pressing contact end 54 of a pressing contact type. The pressing contact end 54 contacts the conductive tube 14 through its elastic pressing piece structure. The current on the PCB board 15 is transmitted to the conductive tube 14 through the conductive connector 5 and finally transmitted to the telescopic electrode 2 and the cutter head 3. The conductive tube 14 not only has a conductive function, but also can provide a guiding function for the telescopic electrode 2 when the telescopic electrode 2 is inserted into the pen body 1, so that the electrode will not deviate. The conductive connector 5 uses a hoop clamping structure. The square clamping end 51 above the conductive connector 5 is fixedly connected with the PCB board 15. The circular clamping end 52 below is a circular hoop design. Since the conductive connector 5 is made of an elastic conductive material, the elastic force provided by the hoop can clamp and fix the conductive tube 14. At the same time, the conductive connector 5 can also connect the PCB board 15 and the conductive tube 14, enabling the current to be transmitted smoothly.

[0044] Embodiment 2

[0045] The difference from the above Embodiment 1 is that according to Figure 10As shown, a pluggable and replaceable cutter head 6 can also be installed on the electrode mounting portion 11 of the pen body 1. The pluggable cutter head 6 includes a pluggable connector 61 and a pluggable electrode 62. The pluggable electrode 62 is fixedly installed on the pluggable connector 61, and the pluggable connector 61 is installed on the electrode mounting portion 11 through an electrode holder 4. In addition to being able to install a replaceable telescopic electrode 2, the electrosurgical pen can also install a pluggable cutter head that does not need to be telescopic and needs to be fixed during use. The pluggable electrode 62 on the pluggable cutter head 6 is fixedly installed on the pluggable connector 61, and a cutter head 3 for surgery is also installed at the head of the pluggable electrode 62. The electrosurgical pen can replace the telescopic electrode and the fixed pluggable electrode 62 at the same time, or replace the cutter head 3. There is no need to replace the entire surgical instrument like a traditional electrosurgical pen, which can quickly adapt to a complex surgical environment, make the surgical process smoother, and improve surgical efficiency.

[0046] According to Figure 3 、 Figure 11 As shown, a pen body stop portion 13 for preventing the pluggable cutter head 6 from rotating is also provided on the electrode mounting portion 11. The pen body stop portion 13 is a keyway stop or a stop plane stop structure, and a connector stop portion 63 corresponding to the structure of the pen body stop portion 13 is also provided on the pluggable connector 61. During the surgical process, a non-rotating cutter head is required. A connector stop portion 63 is provided on the pluggable connector 61, and the inner hexagonal plane is used as the stop plane to prevent the pluggable cutter head 6 from rotating after being installed on the pen body 1 of the electrosurgical pen, making the electrosurgical pen more reliable during the surgical process and the surgical process more accurate and efficient.

[0047] According to Figure 10 、 Figure 11As shown, the cross-sectional diameter of the plug-and-play electrode 62 is smaller than that of the telescopic electrode 2. An elastic pressing piece 53 extending towards one end of the electrode mounting portion 11 is further provided on the square clamping end 51 of the conductive clamping connector 5. The portion where the elastic pressing piece 53 is connected to the square clamping end 51 is a straight-edge connection end 531, and the end far from the square clamping end 51 is an arc pressing piece end 532. The arc pressing piece end 532 can undergo bending deformation under the pressure of the pen body 1 housing and contact the plug-and-play electrode 62, enabling the current of the PCB board 15 to reach the plug-and-play electrode 62 through the elastic pressing piece 53; the plug-and-play electrode 62 is fixedly installed in the plug-and-play connector 61 and then inserted into the pen body 1. The telescopic electrode 2 is directly inserted into the pen body 1. Therefore, the diameter dimension of the plug-and-play electrode 62 is smaller than that of the telescopic electrode 2, resulting in the plug-and-play electrode 62 not being able to directly contact the conductive tube 14. Thus, the current on the conductive tube 14 cannot be transmitted to the plug-and-play electrode 62; however, an elastic pressing piece 53 extending outwards is provided at one end of the conductive clamping connector 5 towards the electrode. The elastic pressing piece 53 is made of beryllium copper, a conductive material with good elastic performance. After the plug-and-play electrode 62 is inserted into the pen body 1, the arc pressing piece end 532 at one end of the elastic pressing piece 53 will contact and deform under the extrusion of the plug-and-play electrode 62, making the arc pressing piece end 532 always firmly contact the plug-and-play electrode 62. The current on the PCB board 15 can be transmitted to the plug-and-play electrode 62 through the elastic pressing piece 53 on the conductive clamping connector 5, enabling the plug-and-play electrode 62 to work properly; and because the arc pressing piece end 532 of the elastic pressing piece 53 has strong elastic performance, when the thicker telescopic electrode 2 is inserted, the elastic pressing piece 53 will only undergo greater deformation and will not interfere with the installation of the telescopic electrode 2, improving the versatility of the electrosurgical pen body 1 and making the adaptability of the electrosurgical pen better.

Claims

1. An electrosurgical pen capable of simultaneous telescoping and cutter head replacement, characterized in that, It includes a pen body (1), a telescopic electrode (2) and a cutter head (3). An electrode mounting part (11) is provided at the position of the pen body (1) where the telescopic electrode (2) is installed. A retainer mounting groove (12) is formed on the electrode mounting part (11). An electrode retainer (4) is arranged in the retainer mounting groove (12). The telescopic electrode (2) is installed inside the pen body (1) through the electrode retainer (4) and extends out. The cutter head (3) is arranged at the head of the telescopic electrode (2). The telescopic electrode (2) of the electrosurgical pen can be extended and shortened according to the depth of the surgical site. The cutter head (3) can also be replaced with other heads of different shapes and different length dimensions as needed. Both the telescopic electrode (2) and the cutter head (3) of the electrosurgical pen are replaceable; A conductive tube (14) is arranged inside the pen body (1). The conductive tube (14) is of a hollow structure. The outer wall of the electrode of the telescopic electrode (2) is in direct contact with the inner wall of the conductive tube (14). After the electrosurgical pen is powered on, the current reaches the conductive tube (14) and can be transmitted to the telescopic electrode (2) through the conductive tube (14); A PCB board (15) is arranged inside the pen body (1). The PCB board (15) is arranged above the conductive tube (14). A conductive mounting groove (16) is formed on the PCB board (15). The PCB board (15) and the conductive tube (14) are fixedly connected and conducted through a conductive connector (5); The conductive connector (5) is of a hoop clamping or crimping clamping structure, including a square clamping end (51) and a circular clamping end (52). The square clamping end (51) is clamped and fixed with the conductive mounting groove (16). The square clamping end (51) is fixed on the PCB board (15) through a rivet structure. The circular clamping end (52) is clamped and fixed with the outer wall of the conductive tube (14). The circular clamping end (52) can be replaced with a pressing contact end (54) of a pressing contact type. The pressing contact end (54) contacts the conductive tube (14) through its elastic pressing sheet structure. The current on the PCB board (15) is transmitted to the conductive tube (14) through the conductive connector (5) and finally transmitted to the telescopic electrode (2) and the cutter head (3); A pluggable and replaceable cutter head (6) can also be installed on the electrode mounting part (11) of the pen body (1). The pluggable cutter head (6) includes a pluggable connector (61) and a pluggable electrode (62). The pluggable electrode (62) is fixedly installed on the pluggable connector (61). The pluggable connector (61) is installed on the electrode mounting part (11) through the electrode retainer (4); The cross-sectional diameter of the plug-in electrode (62) is smaller than that of the telescopic electrode (2). An elastic pressing piece (53) extending towards one end of the electrode mounting part (11) is further provided on the square clamping end (51) of the conductive connector (5). The part where the elastic pressing piece (53) is connected to the square clamping end (51) is a straight-edge connection end (531), and the end far from the square clamping end (51) is an arc pressing piece end (532). The arc pressing piece end (532) can be bent and deformed under the pressure of the housing of the pen body (1) to contact the plug-in electrode (62), so that the current of the PCB board (15) can reach the plug-in electrode (62) through the elastic pressing piece (53).

2. The electric scalpel pen capable of simultaneously telescoping and replacing the cutter head according to claim 1, wherein An electrode insulating layer (21) is further provided on the electrode of the telescopic electrode (2) extending outside the pen body (1). The electrode insulating layer (21) directly extends away from the head of the telescopic electrode (2) with a length of 2 - 10 mm.

3. The electrocautery pen capable of simultaneously telescoping and replacing the cutter head according to claim 1, wherein The edge dimension of the cutting edge (31) of the cutting head (3) is 0.05 - 0.1 mm. When the electrocautery pen is not activated during clinical use, the cutting head (3) will not cut the skin due to being too sharp. The design of the size of the cutting edge (31) of the cutting head (3) can make the discharge of the cutting head (3) more concentrated, so that electrocision and electrocoagulation of the operation can be achieved under low power conditions. A temperature measurement sensor (22) is further provided at a position where the telescopic electrode (2) is close to the cutting head (3). When the electrocautery pen is cutting, the temperature of the cut area can be collected in real time.

4. A surgical electrotome capable of simultaneously telescoping and replacing the cutting head according to claim 1, wherein, The electrode holder (4) is designed as a ring-shaped rubber ring structure and is made of a silicone material with a relatively high coefficient of friction. A number of engaging teeth (41) are provided on the inner wall of the electrode holder (4). The electrode holder (4) is installed with an interference fit with the telescopic electrode (2). The electrode holder (4) can provide sufficient insertion and extraction force for the telescopic electrode (2) while ensuring the stability of the cutting head and the telescopic electrode and being compatible with cutting heads and telescopic electrodes of different diameters.

5. A power scalpel pen capable of simultaneously telescoping and replacing the blade head according to claim 1, characterized in that, A pen body stop part (13) for preventing the plug-in cutting head (6) from rotating is further provided on the electrode mounting part (11). The pen body stop part (13) is a keyway stop or a stop plane stop structure. A connector stop part (63) corresponding to the structure of the pen body stop part (13) is further provided on the plug-in connector (61).

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