Telescopic high-frequency electric knife pen

Abstract

The invention provides a telescopic high-frequency electric knife pen. The telescopic high-frequency electric knife pen comprises an operating handle, an adjusting piece, a guide sleeve and a telescopic rod. The adjusting piece is rotatably installed in an opening in the tail end of the handle shell, the guide sleeve is fixedly installed in the handle shell, the telescopic rod is inserted into the guide sleeve in an axially moving mode, one end of the telescopic rod extends out of an opening in the head end of the handle shell, and the other end of the telescopic rod is in transmission connection with the adjusting piece through a spiral guide groove and a guide protrusion. When the adjusting piece rotates, the telescopic rod is driven to stretch out and draw back. During use, the tool bit is inserted into the sleeve, and when the extension length of the tool bit needs to be adjusted, the adjusting piece is directly rotated to drive the telescopic rod to stretch out and draw back, so that the extension length of the tool bit is adjusted. According to the electric knife pen, the length of the knife head mounted at one end of the telescopic rod can be flexibly adjusted, and the problem that the length of a knife head of a traditional electric knife pen cannot be adjusted is solved; meanwhile, the scalpel heads with different lengths do not need to be frequently replaced in the operation process, the complexity and time cost of the operation are reduced, and the working difficulty of doctors is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a telescopic high-frequency electric surgical pen. Background Art

[0002] High-frequency electrosurgical knife is a surgical instrument that uses high-frequency and high-voltage current generated at the tip to work. The current acts on the body to separate tissues, and the high temperature generated can stop bleeding.

[0003] High-frequency electrosurgery can cut and coagulate blood at the same time, so it is widely used in some operations that are difficult to enter and perform with mechanical scalpels, such as abdominal duct ligation, prostate urethral tumor resection, etc. In addition, due to its good hemostatic effect, high-frequency electrosurgery can also be used to operate on organs with exuding capillaries, such as the liver, spleen, thyroid gland and lungs, and can also be used in thoracotomy that requires a large amount of anticoagulants.

[0004] A prominent problem with traditional electrosurgical pens is that the length of the blade cannot be adjusted. The electrosurgical pen package is generally equipped with a short blade. If this short blade does not meet the actual operation needs during surgery, the separately packaged medium-long blade or long blade must be opened for replacement. However, this solution has certain limitations. The optional range of blade length is limited, which causes doctors to be often restricted by the surgical field of view and surgical site when performing surgical operations. In this case, it is difficult for doctors to achieve precise operations. Sometimes, due to the limitation of the blade length, doctors even need to replace electrosurgical pens with different electrode lengths during surgery. Such operations not only increase the complexity of the operation, but also make the entire operation process cumbersome, which undoubtedly increases the difficulty of the doctor's work and increases the time cost of the operation.

[0005] Therefore, it is necessary to provide an electric knife pen that can flexibly adjust the length of the blade head and has a wide range of blade head length adjustment. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects that the length of the blade of the electric knife pen in the prior art cannot be adjusted, and the optional length range of the separately packaged medium-long blade head or long blade head is limited. As a result, when doctors perform surgical operations, they are often subject to certain restrictions due to the surgical field of view and the surgical site. Sometimes, they even need to replace the electric knife pen with different electrode lengths during the operation, which increases the complexity of the operation and the time cost of the operation. Therefore, an electric knife pen with flexible adjustment of the blade head length and a wide range of blade head length adjustment is provided.

[0007] To this end, the present invention provides a telescopic high-frequency electric knife pen, comprising: The operating handle comprises a shell and a control assembly mounted on the shell, wherein the shell has an accommodating space inside, and a head end opening and a tail end opening communicating with the accommodating space are respectively provided at the head end and the tail end; An adjusting member is rotatably mounted in the tail end opening, and a first limiting structure for limiting the axial movement of the adjusting member is arranged between the adjusting member and the housing; the adjusting member comprises a sleeve extending into the accommodating space, and a spiral guide groove is formed on the inner side wall of the sleeve; The guide sleeve is made of conductive material and is electrically connected to the control assembly; the guide sleeve is fixedly installed inside the accommodating space and has a guide channel extending along the axial direction of the shell; The telescopic rod is made of conductive material, can be axially movably inserted into the guide channel, and is in contact with the inner wall of the guide sleeve; one end of the telescopic rod extends out of the accommodating space from the head end opening, and is provided with a sleeve for installing a cutter head, and the other end passes through the guide sleeve, and a guide protrusion that slides with the spiral guide groove is provided on the outer wall; a second limiting structure for limiting the rotation of the telescopic rod is provided between the telescopic rod and the shell, and when the adjusting member rotates, the side wall of the spiral guide groove pushes the guide protrusion to move axially, thereby driving the telescopic movement of the telescopic rod.

[0008] Furthermore, the adjusting member also includes an adjusting knob which is arranged at one end of the sleeve away from the telescopic rod and located outside the accommodating space.

[0009] Furthermore, the first limiting structure includes: A first through hole is provided on the side wall of the rear end of the housing; an annular groove formed on the outer side wall of the adjusting member and corresponding to the position of the first through hole; The limiting pin passes through the side wall of the shell and enters into the first through hole, and further extends into the annular groove.

[0010] Furthermore, the second limiting structure includes a first limiting surface formed on the inner side wall of the guide sleeve and a second limiting surface formed on the outer side wall of the telescopic rod; The first limiting surface and the second limiting surface are in sliding contact with each other to limit the telescopic rod from rotating in a circumferential direction.

[0011] Furthermore, the guide sleeve is provided with an axial cutout extending along the axial direction thereof and penetrating through two end surfaces of the guide sleeve in the axial direction, and the axial cutout is communicated with the guide channel.

[0012] Furthermore, the sleeve is provided with a U-shaped opening, which includes an axial opening extending along the axial direction of the sleeve and a circumferential opening extending along the circumferential direction of the sleeve; one end of the axial opening passes through the free end of the sleeve, and the other end extends toward the other end of the sleeve and is connected to the circumferential opening.

[0013] Furthermore, the outer wall of the shell is recessed inward to form a mounting groove, and the control component is installed in the mounting groove.

[0014] Furthermore, a first wire channel communicating with the accommodating space and the mounting groove is formed in the shell; a first wire is passed through the first wire channel, and two ends of the first wire are respectively connected to the control component and the guide sleeve.

[0015] Furthermore, a second through hole is provided on the side wall at the rear end of the shell, and a second wire channel connecting the second through hole and the mounting groove is formed on the shell; a second wire is passed through the inside of the second wire channel, one end of the second wire is connected to the control component, and the other end is connected to the external circuit through the second through hole.

[0016] The technical solution provided by the present invention has the following advantages: The telescopic high-frequency electric knife pen of the present invention comprises an operating handle, an adjusting member, a guide sleeve and a telescopic rod; the operating handle comprises a shell and a control assembly mounted on the shell, the shell has an accommodating space inside, and the head end and the tail end are respectively provided with a head end opening and a tail end opening connected to the accommodating space; the adjusting member is rotatably mounted in the tail end opening, and a first limiting structure for limiting the axial movement of the adjusting member is arranged between the adjusting member and the shell; the adjusting member comprises a sleeve extending into the accommodating space, and a spiral guide groove is formed on the inner side wall of the sleeve; the guide sleeve is made of conductive material and is electrically connected to the control assembly; the guide sleeve is fixedly mounted on the accommodating space. Inside the space, there is a guide channel extending along the axial direction of the shell; the telescopic rod is made of conductive material, can be axially movably inserted in the guide channel, and is in contact with the inner wall of the guide sleeve; one end of the telescopic rod extends out of the accommodating space from the head end opening, and is provided with a sleeve for installing the cutter head, and the other end passes through the guide sleeve, and a guide protrusion that slides with the spiral guide groove is provided on the outer wall; a second limiting structure for limiting the rotation of the telescopic rod is provided between the telescopic rod and the shell, and when the adjusting member rotates, the side wall of the spiral guide groove pushes the guide protrusion to move axially, thereby driving the telescopic movement of the telescopic rod.

[0017] When the telescopic high-frequency electric surgical pen of the present invention is used, the doctor first determines the length range of the blade head that may be needed during the operation based on experience, and then selects a blade head of appropriate length; the blade head is inserted into the sleeve, and then the adjusting piece is rotated to adjust the extension amount of the telescopic rod so that the blade head is extended to an appropriate length; during the operation, when the extension length of the blade head needs to be adjusted, the doctor can directly rotate the adjusting piece, thereby driving the telescopic rod to rotate, so as to adjust the extension length of the blade head.

[0018] In the telescopic high-frequency electric surgical pen of the present invention, when the adjusting member rotates, the sleeve rotates accordingly, and the guide protrusion is constrained by the spiral guide groove and can only slide along its trajectory. Under the push of the side wall of the spiral guide groove, the guide protrusion moves axially, thereby driving the telescopic rod to telescopically move in the guide channel of the guide sleeve, thereby converting the rotation of the sleeve into a linear telescopic movement of the telescopic rod. In this way, the length of the blade installed at one end of the telescopic rod can be flexibly adjusted, and the telescopic amount of the telescopic rod can be accurately controlled, thereby accurately controlling the protruding length of the blade, thereby solving the problem that the length of the blade of the traditional electric surgical pen cannot be adjusted; because the telescopic rod can be freely extended and retracted within a certain range, compared with the medium-long blade or long blade of limited length separately encapsulated in the traditional electric surgical pen, the present invention greatly expands the adjustment range of the blade length, so that the doctor can more accurately adjust the blade length according to the actual needs of the operation, and reduces the restrictions on the surgical field and surgical site due to inappropriate blade length; the adjustable blade length with a wide adjustment range enables the doctor to better adapt to different surgical conditions during the surgical operation, thereby improving the accuracy of the surgical operation. At the same time, there is no need to frequently replace electrosurgical pens with different electrode lengths during the operation, which simplifies the surgical operation, reduces the complexity and time cost of the operation, and eases the difficulty of the doctor's work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the prior art or the specific implementation manner of the present invention, the drawings used in the description of the prior art or the specific implementation manner are briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the overall structure of the telescopic high-frequency electric knife pen of the present invention.

[0021] Figure 2 yes Figure 1 Exploded diagram.

[0022] Figure 3 yes Figure 1 sectional view of .

[0023] Figure 4 It is a structural schematic diagram of the telescopic rod.

[0024] Figure 5 It is a structural schematic diagram of the guide sleeve.

[0025] Figure 6 It is a structural diagram of the operating handle.

[0026] Figure numerals: 01, cutter head; 1, operating handle; 100, accommodating space; 11, shell; 111, head end opening; 112, tail end opening; 113, first through hole; 114, mounting groove; 115, first wire channel; 116, second through hole; 117, second wire channel; 12, control component; 16, limit pin; 2, adjustment member; 21, sleeve; 211, spiral guide groove; 22, adjustment knob; 23, annular groove; 3, guide sleeve; 300, guide channel; 31, first limit surface; 32, axial incision; 4, telescopic rod; 400, sleeve; 41, guide protrusion; 42, second limit surface; 43, 7-shaped opening. DETAILED DESCRIPTION

[0027] In order to make those skilled in the art better understand the present solution, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the claims and description of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not limited to those steps or units clearly listed, but may also include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

[0030] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0031] This embodiment provides a telescopic high-frequency electric knife pen, such as Figure 1-6 As shown, it includes: an operating handle 1, an adjusting member 2, a guide sleeve 3 and a telescopic rod 4; the operating handle 1 includes a shell 11 and a control assembly 12 installed on the shell 11, the shell 11 has an accommodating space 100 inside, and the head end and the tail end are respectively provided with a head end opening 111 and a tail end opening 112 connected to the accommodating space 100; the adjusting member 2 is rotatably installed in the tail end opening 112, and a first limiting structure for limiting the axial movement of the adjusting member 2 is provided between the shell 11; the adjusting member 2 includes a sleeve 21 extending into the accommodating space 100, and a spiral guide groove 211 is formed on the inner side wall of the sleeve 21; the guide sleeve 3 is made of conductive material and is electrically connected to the control assembly; the guide sleeve 3 is fixedly installed in the accommodating space 1 00, there is a guide channel 300 extending along the axial direction of the shell 11; the telescopic rod 4 is made of conductive material, can be axially movably inserted in the guide channel 300, and is in contact with the inner wall of the guide sleeve 3; one end of the telescopic rod 4 extends out of the accommodating space 100 from the head end opening 111, and is provided with a sleeve 400 for installing the cutter head 01, and the other end passes through the guide sleeve 3, and a guide protrusion 41 that slides with the spiral guide groove 211 is provided on the outer wall; a second limiting structure for limiting the rotation of the telescopic rod 4 is provided between the telescopic rod 4 and the shell 11, and when the adjusting member 2 rotates, the side wall of the spiral guide groove 211 pushes the guide protrusion 41 to move axially, thereby driving the telescopic movement of the telescopic rod 4.

[0032] In this embodiment, the control component 12 may include a control circuit board and operation buttons. The control circuit board may be a printed circuit board. The operation buttons may include an electrocoagulation function switch and an electrocuting function switch. Both the control circuit board and the operation buttons may be used to utilize mature products already on the market, or may be improved based on mature products already on the market (e.g., the FD100L model electrosurgical pen of Mosbi Medical (Wuhan) Co., Ltd.). The control circuit board is used to control various functions of the electrosurgical pen, such as adjusting the output power, controlling the working mode, etc. The operation buttons provide a convenient operation method for doctors. Doctors can use the operation buttons to start or stop the operation of the high-frequency electrosurgical pen, as well as set and adjust other related functions. For example, doctors can select different cutting modes or coagulation modes through the operation buttons to meet the needs of different surgical operations. The sleeve 400 is used to install the blade head 01. Specifically, the blade head 01 can be any existing universal electric knife blade head (such as a needle-shaped blade head, a knife-shaped blade head, a spherical blade head, a square blade head, a triangular cone blade head, a B-shaped blade head, a ring blade head, etc.). In this way, the mature products already on the market can be directly used without redesigning and developing new blade heads, thereby reducing costs. Alternatively, the blade head 01 can also be individually customized according to the sleeve 400, which is not limited in this application. For blade heads 01 of different lengths, the length adjustment range finally achieved is also different. Doctors can choose a blade head 01 of appropriate length based on clinical experience. When in use, the doctor first determines the length range of the blade head 01 that may be needed during the operation based on experience, and then selects a blade head 01 of appropriate length; inserts the blade head 01 into the sleeve 400, and then rotates the adjustment member 2 to adjust the extension amount of the telescopic rod 4 so that the blade head 01 extends to an appropriate length; during the operation, when it is necessary to adjust the extension length of the blade head 01, the doctor can directly rotate the adjustment member 2, thereby driving the telescopic rod 4 to rotate, so as to adjust the extension length of the blade head 01.

[0033] In the telescopic high-frequency electric knife pen of this embodiment, when the adjusting member 2 rotates, the sleeve 21 rotates accordingly, and the guide protrusion 41 is constrained by the spiral guide groove 211 and can only slide along its trajectory. Under the push of the side wall of the spiral guide groove 211, the guide protrusion 41 moves axially, thereby driving the telescopic rod 4 to telescopically move in the guide channel 300 of the guide sleeve 3, thereby converting the rotation of the sleeve 21 into a linear telescopic movement of the telescopic rod 4. In this way, the length of the cutter head 01 installed at one end of the telescopic rod 4 can be flexibly adjusted, and the telescopic amount of the telescopic rod 4 can be accurately controlled, thereby accurately controlling the cutter head 0 1. The extended length solves the problem that the length of the blade of the traditional electrosurgical pen cannot be adjusted; because the telescopic rod 4 can be freely extended and retracted within a certain range, compared with the medium-length blade or long blade of limited length separately packaged in the traditional electrosurgical pen, this embodiment greatly expands the adjustment range of the blade length, so that the doctor can adjust the blade length more accurately according to the actual needs of the operation, reducing the restrictions on the surgical field and surgical site due to inappropriate blade length; the adjustable blade length with a wide adjustment range enables the doctor to better adapt to different surgical situations during the operation, and improves the accuracy of the surgical operation. At the same time, there is no need to frequently change the electrosurgical pen with different electrode lengths during the operation, which simplifies the surgical operation, reduces the complexity and time cost of the operation, and reduces the difficulty of the doctor's work.

[0034] In the telescopic high-frequency electric surgical pen of this embodiment, further, the adjusting member 2 also includes an adjusting knob 22 which is arranged at one end of the sleeve 21 away from the telescopic rod 4 and located outside the accommodating space 100 .

[0035] In this embodiment, an adjustment knob 22 is provided at one end of the sleeve 21 away from the telescopic rod 4 and outside the accommodating space 100. The doctor can directly hold and turn the adjustment knob 22 by hand, thereby driving the sleeve 21 to rotate, thereby adjusting the extension length of the blade head 01. The operation is convenient and labor-saving, thereby improving the efficiency of surgical operations.

[0036] The telescopic high-frequency electric knife pen of this embodiment is as follows Figure 2-5 The first limiting structure includes a first through hole 113, an annular groove 23 and a limiting pin 16; the first through hole 113 is opened on the side wall of the rear end of the shell 11; the annular groove 23 is formed on the outer side wall of the adjusting member 2 and corresponds to the position of the first through hole 113; the limiting pin 16 passes through the side wall of the shell 11 into the first through hole 113 and further extends into the annular groove 23.

[0037] In this embodiment, the limiting pin 16 can slide in the annular groove 23 to limit the movement of the adjusting member 2 in the axial direction so that the adjusting member 2 can only rotate around the axis.

[0038] The telescopic high-frequency electric knife pen of this embodiment is as follows Figure 4 and Figure 5 The second limiting structure includes a first limiting surface 31 formed on the inner wall of the guide sleeve 3 and a second limiting surface 42 formed on the outer wall of the telescopic rod 4; the first limiting surface 31 and the second limiting surface 42 are slidably abutted to limit the circumferential rotation of the telescopic rod 4.

[0039] In this embodiment, the first limiting surface 31 can be one or more planes formed on the inner wall of the guide sleeve 3, and the second limiting surface 42 can be one or more planes correspondingly formed on the outer wall of the telescopic rod 4. When the telescopic rod 4 moves axially in the guide sleeve 3, the abutment relationship between the first limiting surface 31 and the second limiting surface 42 limits the circumferential rotation of the telescopic rod 4.

[0040] The telescopic high-frequency electric knife pen of this embodiment is as follows Figure 5 As shown, the guide sleeve 3 is provided with an axial cutout 32 extending along the axial direction thereof and penetrating through two end surfaces of the guide sleeve 3 in the axial direction, and the axial cutout 32 is communicated with the guide channel 300 .

[0041] In this embodiment, the guide sleeve 3 is elastic and can be elastically deformed, and the axial cutout 32 helps to increase the elasticity and adaptability of the guide sleeve 3 to achieve a close fit with the telescopic rod 4 .

[0042] The telescopic high-frequency electric knife pen of this embodiment is as follows Figure 4 As shown, the sleeve 400 is provided with a 7-shaped opening 43, and the 7-shaped opening 43 includes an axial opening extending along the axial direction of the sleeve 400 and a circumferential opening extending along the circumferential direction of the sleeve 400; one end of the axial opening passes through the free end of the sleeve 400, and the other end extends toward the other end of the sleeve 400 and is connected to the circumferential opening.

[0043] In this embodiment, the sleeve 400 is elastic and can be elastically deformed, and the 7-shaped opening 43 helps to increase the elasticity and adaptability of the sleeve 400, so that the blade head 01 can be clamped to prevent the blade head 01 from being displaced during the operation.

[0044] The telescopic high-frequency electric knife pen of this embodiment is as follows Figure 2 , Figure 6 As shown, the outer wall of the housing 11 is recessed inward to form a mounting groove 114 , and the control component 12 is installed in the mounting groove 114 .

[0045] In this embodiment, the control circuit board and the operating buttons can be manufactured and assembled as a whole and installed in an insulating shell. The operating buttons (such as the electrocoagulation function switch and the electrocuting function switch) partially protrude from the insulating shell through the through holes (not shown) on the surface of the insulating shell. Then, the insulating shell can be fixed in the mounting groove 114 using screws.

[0046] The telescopic high-frequency electric knife pen of this embodiment is as follows Figure 2 , Figure 3 , Figure 6 As shown, a first wire channel 115 communicating with the accommodating space 100 and the mounting groove 114 is formed in the housing 11 , a first wire is passed through the first wire channel 115 , and two ends of the first wire are respectively connected to the control component 12 and the guide sleeve 3 .

[0047] In this embodiment, a first wire channel 115 is formed in the housing to connect the accommodating space 100 and the mounting groove 114. The first wire channel 115 can be used to arrange a first wire (not shown in the figure) connecting the control component 12 and the guide sleeve 3. The first wire channel 115 provides a fixed and safe wiring path for the first wire, avoids the first wire from being arranged in a disorderly manner inside the electrosurgical pen, reduces the risk of failure caused by wire entanglement or friction, ensures the stability and reliability of electrical signal transmission, and helps to improve the overall performance of the electrosurgical pen.

[0048] The telescopic high-frequency electric surgical pen of this embodiment further comprises a second through hole 116 provided on the side wall at the rear end of the shell 11, and a second wire channel 117 connecting the second through hole 116 and the mounting groove 114 is formed on the shell 11; a second wire is passed through the inside of the second wire channel 117, and one end of the second wire is connected to the control component 12, and the other end is connected to the external circuit via the second through hole 16.

[0049] In this embodiment, one end of the second wire (not shown in the figure) can be connected to the control component 12 through the second wire channel 117, and the other end can be connected to the external circuit of the electrosurgical pen through the second through hole 116, so as to realize the transmission of electrical signals. The second through hole 116 and the second wire channel 117 provide convenience for connecting the external circuit with the internal circuit of the electrosurgical pen, and standardize the direction of the wire, ensure the neatness of the internal circuit of the electrosurgical pen, and improve the electrical safety and reliability of the electrosurgical pen.

[0050] The telescopic high-frequency electrosurgical pen of this embodiment works as follows: the doctor first determines the length range of the blade head 01 that may be required during the operation based on experience, and then selects the blade head 01 of appropriate length; Insert the cutter head 01 into the sleeve 400, and then turn the adjustment knob 22 to adjust the extension amount of the telescopic rod 4 so that the cutter head 01 extends to a suitable length; During the operation, when the extension length of the blade head 01 needs to be adjusted, the doctor can directly hold and turn the adjustment knob 22 by hand, thereby driving the sleeve 21 to rotate, thereby adjusting the extension length of the blade head 01.

[0051] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of this innovative technical solution.

Claims

1. A telescopic high-frequency electric knife pen, characterized in that: include: An operating handle (1) comprises a housing (11) and a control assembly (12) mounted on the housing (11); the housing (11) has an interior containing space (100); a front end opening (111) and a rear end opening (112) communicating with the containing space (100) are provided at the front end and the rear end respectively; An adjusting member (2) is rotatably mounted in the tail end opening (112), and a first limiting structure for limiting axial movement of the adjusting member (2) is provided between the adjusting member and the housing (11); the adjusting member (2) comprises a sleeve (21) extending into the accommodating space (100), and a spiral guide groove (211) is formed on an inner side wall of the sleeve (21); The guide sleeve (3) is made of a conductive material and is electrically connected to the control component; the guide sleeve (3) is fixedly installed inside the accommodating space (100) and has a guide channel (300) extending along the axial direction of the housing (11); The telescopic rod (4) is made of conductive material, is axially movably inserted into the guide channel (300), and is in contact with the inner wall of the guide sleeve (3); one end of the telescopic rod (4) extends out of the accommodating space (100) from the head end opening (111), and is provided with a sleeve (400) for mounting a cutter head (01); the other end passes through the guide sleeve (3), and an outer wall is provided with a guide protrusion (41) that slidably cooperates with the spiral guide groove (211); a second limiting structure for limiting the rotation of the telescopic rod (4) is provided between the telescopic rod (4) and the housing (11); when the adjusting member (2) rotates, the side wall of the spiral guide groove (211) pushes the guide protrusion (41) to move axially, thereby driving the telescopic rod (4) to telescope.

2. The telescopic high-frequency electric surgical pen according to claim 1, characterized in that: The adjusting member (2) further comprises an adjusting knob (22) which is arranged at an end of the sleeve (21) away from the telescopic rod (4) and located outside the accommodating space (100).

3. The telescopic high-frequency electric surgical pen according to claim 1, characterized in that: The first limiting structure comprises: A first through hole (113) is formed on a side wall of a rear end of the housing (11); an annular groove (23) formed on the outer side wall of the adjusting member (2) and corresponding to the position of the first through hole (113); The limiting pin (16) passes through the side wall of the housing (11) and enters into the first through hole (113), and further extends into the annular groove (23).

4. The telescopic high-frequency electric surgical pen according to claim 1, characterized in that: The second limiting structure comprises a first limiting surface (31) formed on the inner wall of the guide sleeve (3) and a second limiting surface (42) formed on the outer wall of the telescopic rod (4); The first limiting surface (31) and the second limiting surface (42) are in sliding contact with each other to limit the circumferential rotation of the telescopic rod (4).

5. The telescopic high-frequency electric surgical pen according to claim 1, characterized in that: The guide sleeve (3) is provided with an axial cutout (32) extending along its axial direction and penetrating through two end surfaces of the guide sleeve (3) in the axial direction, and the axial cutout (32) is communicated with the guide channel (300).

6. The telescopic high-frequency electric surgical pen according to claim 1, characterized in that: The sleeve (400) is provided with a 7-shaped opening (43), the 7-shaped opening (43) comprising an axial opening extending in the axial direction of the sleeve (400) and a circumferential opening extending in the circumferential direction of the sleeve (400); one end of the axial opening passes through the free end of the sleeve (400), and the other end extends toward the other end of the sleeve (400) and is connected to the circumferential opening.

7. The telescopic high-frequency electric surgical pen according to claim 1, characterized in that: The outer wall of the housing (11) is recessed inwardly to form a mounting groove (114), and the control component (12) is mounted in the mounting groove (114).

8. The telescopic high-frequency electric surgical pen according to claim 1, characterized in that: A first wire channel (115) communicating with the accommodating space (100) and the mounting groove (114) is formed in the housing (11); a first wire is passed through the first wire channel (115), and two ends of the first wire are respectively connected to the control component (12) and the guide sleeve (3).

9. The telescopic high-frequency electric surgical pen according to claim 1, characterized in that: A second through hole (116) is provided on the side wall of the rear end of the housing (11), and a second wire channel (117) is formed on the housing (11) and communicates with the second through hole (116) and the mounting groove (114); a second wire is passed through the interior of the second wire channel (117), one end of the second wire is connected to the control component (12), and the other end is connected to an external circuit via the second through hole (16).

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