One-key temperature control visual heat energy scalpel

The design of the one-button temperature-controlled visual thermal surgical scalpel solves the problems of high residual heat, inconvenient scalpel tip replacement, and the influence of adhering substances. It enables rapid storage and cleaning of the electrothermal scalpel tip, improving surgical safety and efficiency.

CN122123767APending Publication Date: 2026-06-02BEIJING HONGREN NINGRUI TECH DEV CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING HONGREN NINGRUI TECH DEV CO LTD
Filing Date
2026-03-27
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing thermal surgical scalpels have problems such as high residual heat, inconvenient blade replacement, deposits affecting heat conduction, and safety hazards. They need to be used alternately with other instruments, which affects surgical efficiency and safety.

Method used

The device features a one-button temperature-controlled, visual thermal surgical scalpel, equipped with an insulation pad, temperature adjustment button, one-button temperature control button, electric heating transducer, temperature display screen, and storage and cleaning components. This allows for quick storage and cleaning of the electric heating scalpel head, avoiding contact with residual heat and the influence of adhering substances.

Benefits of technology

It improves operational safety and convenience, ensures stable use of thermal surgical scalpels, reduces the risk of burns and the decrease in heat conduction efficiency, and enhances surgical efficiency and safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a one-button temperature-controlled visual thermal surgical scalpel, relating to the field of medical device technology. It includes a scalpel body with an insulating pad on its outer wall. A temperature adjustment button and a one-button temperature control button are installed at one end of the outer wall of the scalpel body near the insulating pad. An electrothermal transducer is located inside the scalpel body, converting electrical energy supplied by a power source into heat energy via leads and a plug. An electrothermal blade head is located at one end of the inner wall of the scalpel body near the electrothermal transducer. This invention uses a rotating block, transmission ring, and rotating cylinder to extend and retract the electrothermal blade head. When other instruments need to be replaced during surgery or after the surgery, the scalpel body shell provides comprehensive physical isolation from the residual heat of the electrothermal blade head, effectively preventing medical personnel from accidentally touching the hot blade head. This reduces the risk of burns caused by the high-temperature blade head and improves the operational safety and ease of use of the thermal surgical scalpel.
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Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a one-button temperature-controlled visual thermal surgical scalpel. Background Technology

[0002] One of the core operations of surgery is the anatomical separation and cutting of tissues, while simultaneously ensuring hemostasis and protecting surrounding normal tissues. The performance of surgical instruments directly determines the precision, safety, and postoperative recovery of the patient. Since the establishment of the surgical system, surgical instruments have undergone iterative development from purely mechanical cutting to energy-based devices. Among them, thermal instruments, with their core advantage of integrated cutting and coagulation, have become one of the most widely used surgical instruments in clinical practice. To solve the problem of synergistic cutting and hemostasis, thermal surgical instruments have gradually become the mainstream in clinical practice, including high-frequency electrosurgical units, ultrasonic scalpels, and electrothermal thermal scalpels.

[0003] Electrothermal surgical scalpels use a built-in heating element to precisely heat the blade directly, achieving tissue cutting and simultaneous coagulation with controllable thermal energy. Compared to high-frequency electrosurgical units, they do not require current to flow through the human body to form a circuit, reducing the risk of electrical stimulation. At the same time, they can significantly reduce the working temperature and decrease tissue carbonization.

[0004] In existing technologies, when performing surgical procedures using a thermal surgical scalpel, a one-button temperature control mechanism can quickly call preset temperature parameters to drive the scalpel head to generate appropriate working heat. During surgery, when operating on blood-supplied soft tissues, subcutaneous tissues, fascia, etc., tissue cutting and hemostasis can be completed simultaneously, effectively reducing intraoperative bleeding and maintaining a clear surgical field. However, this type of instrument is generally used intermittently in clinical practice. During surgery, it needs to be used alternately with other instruments such as ordinary cold knives. When changing instruments during surgery, the residual heat of the thermal surgical scalpel head after use cannot be quickly cooled down. If medical staff accidentally touch the scalpel head during surgery, it may pose a safety hazard. At the same time, after use, blood, soft tissue, protein coagulation, etc. are easily attached to the surface of the scalpel head. These attachments form a low thermal conductivity insulation layer on the surface of the scalpel head, which will hinder the effective conduction of heat energy from the scalpel head to the tissue, and may affect the performance of the thermal surgical scalpel. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a one-button temperature-controlled visual thermal surgical scalpel to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a one-button temperature-controlled visual thermal surgical scalpel, comprising a scalpel body, an insulating pad on the outer wall of the scalpel body, a temperature adjustment button and a one-button temperature control button installed at one end of the outer wall of the scalpel body near the insulating pad, an electrothermal transducer inside the scalpel body, the electrothermal transducer converting electrical energy supplied by a power supply device into heat energy through leads and a plug, an electrothermal cutting head on one end of the inner wall of the scalpel body near the electrothermal transducer, a temperature display screen embedded in the outer wall of the scalpel body, a storage assembly for driving the electrothermal cutting head to move inside the scalpel body, and a cleaning assembly for wiping the electrothermal cutting head at the end of the outer wall of the scalpel body.

[0007] Preferably, the storage assembly includes a rotating cylinder located on the inner wall of the blade body, a transmission ring is fixedly connected to one end of the rotating cylinder, a rotating block is engaged on one side of the transmission ring, and a slot matching the rotating block is opened on the outer wall of the blade body.

[0008] Preferably, the inner wall of the rotating cylinder is provided with a fixed cylinder, the fixed cylinder is connected to the inner wall of the cutter body, the outer circumference of the rotating cylinder is symmetrically provided with a spiral groove, and the outer circumference of the fixed cylinder is symmetrically provided with a limiting groove.

[0009] Preferably, one end of the electric heating blade is connected to a mounting base, and the outer circumference of the mounting base is symmetrically provided with sliders, which are respectively inserted into the spiral groove and the limiting groove.

[0010] Preferably, the cleaning component includes an annular block slidably connected to the outer wall of the blade body. Two sets of connecting seats are symmetrically fixedly connected to the end of the outer wall of the blade body, and a rotating shaft is connected to the center of each of the two sets of connecting seats by a torsion spring. The two ends of the two sets of rotating shafts extend to the outside of the connecting seats and are fixedly connected to a rotating seat.

[0011] Preferably, the inner wall of the annular block is rotatably connected to a connecting rod via a connector, and the end of the connecting rod away from the annular block is rotatably connected to the outer wall of the rotating shaft. A cavity is provided on the surface of the cutter body for the connecting rod to move.

[0012] Preferably, a connecting block is fixedly connected at the center of the inner wall of the annular block. One end of the connecting block is equipped with a return spring connected to the inner wall of the blade body. The end of the connecting block away from the return spring is provided with a locking block. The top of the locking block is equipped with a compression spring connected to the inner wall of the blade body. The surface of the connecting block is provided with a locking groove that matches the locking block.

[0013] Preferably, a cleaning cotton is installed on the side surface of the rotating seat away from the rotating shaft, and a fixing block is connected to the side surface of the cleaning cotton via a fixing rod. A movable block is slidably connected to the outer wall of the fixing rod between the fixing block and the cleaning cotton. The fixing block and the movable block are matched with the circular groove.

[0014] In summary, the present invention has the following main beneficial effects: 1. This invention utilizes a linkage transmission system consisting of a rotating block, a transmission ring, and a rotating cylinder. This system, along with the limiting groove of the fixed cylinder and the slider on the outer periphery of the electrothermal scalpel mounting base, forms a limiting engagement. Guided by the spiral groove on the rotating cylinder, the extension and retraction of the electrothermal scalpel head can be smoothly and efficiently accomplished. When other instruments need to be replaced during surgery or after the procedure, simply rotating the rotating block in the opposite direction quickly retracts the electrothermal scalpel head into the internal storage cavity of the scalpel body. The scalpel body shell provides comprehensive physical isolation from the residual heat of the electrothermal scalpel head, effectively preventing medical personnel from accidentally touching it. This reduces the risk of burns caused by the high-temperature scalpel head and significantly improves the operational safety and ease of use of the thermal surgical scalpel. 2. During the process of storing and resetting the electrothermal scalpel head using the storage component, the cleaning cotton is kept in continuous contact with the surface of the electrothermal scalpel head for wiping. This automatically completes the cleaning of the surface of the electrothermal scalpel head while it is being stored, effectively removing contaminants such as blood, soft tissue debris, and protein coagulation formed at high temperatures from the working surface of the electrothermal scalpel head. This reduces problems such as poor cutting during surgery and decreased hemostasis caused by the presence of contaminants, and to a certain extent ensures the heat transfer efficiency and working stability of the electrothermal scalpel head, enabling the thermal surgical scalpel to be used stably for a long time. Attached Figure Description

[0015] Figure 1 This is a first-view perspective three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a second-view perspective three-dimensional schematic diagram of the overall structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of the overall structure of the present invention in use. Figure 4 This is a three-dimensional schematic diagram of the overall structure of the electrothermal blade and storage assembly of the present invention; Figure 5 This is a three-dimensional disassembly diagram of the electrothermal blade and storage assembly structure of the present invention; Figure 6 This is a three-dimensional schematic diagram of the overall structure of the cleaning component of the present invention; Figure 7 This is a first-view perspective three-dimensional schematic diagram of a portion of the cleaning component structure of the present invention; Figure 8 This is a second-view perspective perspective view of a portion of the cleaning component structure of the present invention; Figure 9 This is a three-dimensional exploded view of the rotating base and cleaning cotton of the present invention; Figure 10 This is a three-dimensional disassembly diagram of the rotating seat structure of the present invention.

[0016] In the diagram: 1. Blade body; 11. Insulation pad; 2. Heating blade head; 21. Mounting base; 31. Rotating drum; 311. Spiral groove; 32. Transmission ring; 33. Rotating block; 34. Fixed cylinder; 341. Limiting groove; 41. Annular block; 42. Connecting block; 43. Locking block; 44. Rotating seat; 441. Spring limiting rod; 45. Connecting rod; 451. Rotating shaft; 46. Cleaning cotton; 47. Fixed block; 48. Movable block. Detailed Implementation

[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0018] A one-button temperature-controlled, visualized thermal surgical scalpel, such as Figure 1 - Figure 10 As shown, the outer wall of the blade body 1 is equipped with a heat insulation pad 11, which is composed of fibrous aggregated tissue, porous structure material, and composite plastic, and can play a role in heat insulation and protection. A temperature adjustment button and a one-button temperature control button are installed on one end of the outer wall of the blade body 1 near the heat insulation pad 11. The temperature adjustment button can raise or lower the temperature of the electrothermal blade head 2, while the one-button temperature control button can directly set the temperature of the electrothermal blade head 2 to 260℃, eliminating the need for step-by-step adjustments via the temperature adjustment button, thus facilitating operation by medical personnel. An electrothermal transducer is installed inside the blade body 1, and the transducer converts the electrical energy supplied by the power supply equipment into heat energy through leads and a plug, achieving thermal coagulation and hemostasis while the electrothermal blade head 2 cuts small blood vessels or tissues. A temperature... The temperature sensor forms a closed-loop temperature system with the power supply device via leads and plugs, which can precisely control the temperature of the electrothermal head 2. The electrothermal head 2 is located on the inner wall of the blade body 1 at one end of the electrothermal transducer. The surface of the electrothermal head 2 is coated with a hemophobic and anti-adhesion layer, which is composed of high molecular materials such as polyvinyl fluoride and Teflon. While electrothermally stopping hemostasis during surgery, the electrothermal head 2 reduces adhesion of tissue and blood. A temperature display screen is embedded in the outer wall of the blade body 1, which can display the current temperature of the electrothermal head 2. Medical staff can directly observe the current temperature of the electrothermal head 2 during surgery. The blade body 1 has a storage component that drives the movement of the electrothermal head 2 inside, and a cleaning component that wipes the electrothermal head 2 at the end of the outer wall of the blade body 1.

[0019] See Figure 4 and Figure 5 It is known that the storage component includes a rotating cylinder 31 located on the inner wall of the blade body 1. A transmission ring 32 is fixedly connected to one end of the rotating cylinder 31. A rotating block 33 is engaged on one side of the transmission ring 32. A slot matching the rotating block 33 is opened on the outer wall of the blade body 1. By rotating the rotating block 33, the transmission ring 32 can be driven to rotate under the transmission of the rotating block 33, thereby synchronously driving the rotating cylinder 31 to rotate. The inner wall of the rotating cylinder 31 is provided with a fixed cylinder 34, which is connected to the inner wall of the cutter body 1. The outer circumference of the rotating cylinder 31 is symmetrically provided with a spiral groove 311, and the outer circumference of the fixed cylinder 34 is symmetrically provided with a limit groove 341. The electric heating blade 2 is connected to a mounting base 21 at one end. The mounting base 21 has a slider symmetrically arranged on its outer periphery, and the slider is inserted into the spiral groove 311 and the limiting groove 341 respectively. When the rotating drum 31 rotates, the mounting base 21 can be moved by the action of the spiral groove 311 and the slider. The limiting groove 341 limits the slider, so that the mounting base 21 can move in parallel, which facilitates the extension and retraction of the electric heating blade 2.

[0020] See Figure 6 - Figure 10 It is known that the cleaning component includes an annular block 41 that is slidably connected to the outer wall of the blade body 1. Two sets of connecting seats are symmetrically fixedly connected to the end of the outer wall of the blade body 1, and a rotating shaft 451 is connected to the center of each of the two sets of connecting seats through a torsion spring. The two ends of the two sets of rotating shafts 451 extend to the outside of the connecting seats and are fixedly connected to a rotating seat 44. When the rotating shaft 451 rotates, it can synchronously drive the rotating seat 44 to rotate. A connecting rod 45 is rotatably connected to the inner wall of the annular block 41 via a connector. The end of the connecting rod 45 away from the annular block 41 is rotatably connected to the outer wall of the rotating shaft 451. A cavity is provided on the surface of the blade body 1 for the connecting rod 45 to move. The connecting rod 45 is connected to the outer surface of the rotating shaft 451 away from the annular block 41. When the annular block 41 drives the connecting rod 45 to move, it can drive the rotating shaft 451 to rotate. Then, the rotating shaft 451, in conjunction with the rotating seat 44, can drive the cleaning cotton 46 to rotate, so that the two sets of cleaning cotton 46 are in an open state, which facilitates the extension of the electric heating blade head 2 from the inside of the blade body 1. A connecting block 42 is fixedly connected to the center of the inner wall of the annular block 41. One end of the connecting block 42 is equipped with a return spring connected to the inner wall of the blade body 1. The end of the connecting block 42 away from the return spring is provided with a locking block 43. The annular block 41 can be reset by the elastic action of the return spring. The top of the locking block 43 is equipped with a compression spring connected to the inner wall of the blade body 1. The surface of the connecting block 42 is provided with a slot that matches the locking block 43. When the locking block 43 is inserted into the inner wall of the slot on the surface of the connecting block 42, the position of the annular block 41 can be fixed. When an external force is applied to the locking block 43 and the compression spring is squeezed, the locking block 43 can be separated from the slot, thereby releasing the locking of the annular block 41. A circular groove is formed on one side surface of the rotating seat 44, and two sets of spring limiting rods 441 are symmetrically arranged on the inner wall of the groove. A cleaning cotton 46 is installed on the side surface of the rotating seat 44 away from the rotating shaft 451. The surface of the cleaning cotton 46 is coated with alcohol. A fixing block 47 is connected to one side surface of the cleaning cotton 46 via a fixing rod, and a movable block 48 is slidably connected between the fixing block 47 and the cleaning cotton 46 on the outer wall of the fixing rod. The fixing block 47 and the movable block 48 match the circular groove. When it is necessary to install the cleaning cotton 46 onto the rotating seat 44, the fixing block 47 and the movable block 48 on the fixing rod are connected. When the spring limiting rod 441 is engaged with the inner wall of the circular groove, it can limit the position of the cleaning cotton 46. When the cleaning cotton 46 needs to be disassembled after use, the cleaning cotton 46 is brought into contact with the support surface and pressure is applied to the cleaning cotton 46. At this time, the fixed block 47 and the movable block 48 on the fixed rod continue to move towards the end of the circular groove. When the spring limiting rod 441 moves between the movable block 48 and the cleaning cotton 46, the cleaning cotton 46 is pressed down to separate it from the rotating seat 44, thus facilitating the disassembly of the cleaning cotton 46.

[0021] The working principle of this invention is as follows: When using the thermal surgical scalpel, medical personnel hold it on the heat insulation pad 11 of the scalpel body 1. During use, the working temperature of the heating head 2 is first adjusted and controlled using the temperature adjustment button, or the temperature of the heating head 2 is adjusted to the preset working temperature using the one-button temperature control button. Then, the annular block 41 is pushed, and the annular block 41 drives the rotating shaft 451 to rotate through the connecting rod 45. Under the action of the rotating shaft 451, the rotating seat 44 rotates synchronously, and the cleaning cotton 46 rotates accordingly. The seat 44 rotates synchronously. When the locking block 43 engages with the slot on the surface of the connecting block 42, it achieves the limiting and fixing of the annular block 41, thereby completing the angular positioning of the rotating seat 44. Then, the rotating block 33 is moved, and the rotating block 33 drives the rotating drum 31 to rotate through the transmission ring 32. Since the mounting seat 21 on the electric heating knife head 2 is symmetrically provided with a slider on its outer circumference, the limiting groove 341 forms a limiting fit with the slider. When the rotating drum 31 rotates, with the help of the guiding fit of the spiral groove 311, the electric heating knife head 2 can be extended from the inner cavity of the knife body 1 for use as a thermal surgical scalpel. After changing instruments during the operation or after use, turn off the temperature adjustment button to stop the heating and heat preservation of the electrothermal knife head 2. Then, apply a radial force to the locking block 43 to cause the locking block 43 to move. When the locking block 43 separates from the slot on the connecting block 42, the reset spring can drive the annular block 41 to reset. At the same time, the rotating seat 44 and the rotating shaft 451 rotate synchronously to reset under the elastic reset action of the torsion spring. At this time, the cleaning cotton 46 forms a close fit with the side wall of the electrothermal knife head 2. The rotating block 33 rotates in the opposite direction, and under the action of the transmission ring 32 and the rotating cylinder 31, it drives the electrothermal blade head 2 to reset and be stored inside the storage cavity of the blade body 1. This prevents medical staff from accidentally touching the electrothermal blade head 2 which is carrying residual heat, thus improving the safety of using the thermal surgical scalpel. At the same time, the electrothermal blade head 2 keeps in close contact with the cleaning cotton 46 during storage. The cleaning cotton 46 wipes and cleans the surface of the electrothermal blade head 2, thereby preventing blood, soft tissue, protein coagulation and other deposits from adhering to the surface of the electrothermal blade head 2, which would hinder the effective conduction of heat energy from the electrothermal blade head 2. This facilitates the normal use of the thermal surgical scalpel. After the heating blade 2 is fully retracted into the receiving cavity of the blade body 1, the cleaning cotton 46 is brought into contact with the supporting surface, and then an axial downward pressing force is applied to the blade body 1. At this time, the spring limiting rod 441 on the rotating seat 44 is compressed and slides between the cleaning cotton 46 and the movable block 48. Since the outer peripheral surfaces of the fixed block 47 and the movable block 48 are both inclined and symmetrically arranged, keeping the cleaning cotton 46 fixed at this time allows the limiting engagement between the cleaning cotton 46 and the rotating seat 44 to be released. The cleaning cotton 46 is then disassembled and replaced. The new cleaning cotton 46 is then aligned and fitted with the circular groove of the rotating seat 44. The fixing block 47 is then inserted into the inner cavity of the circular groove. During the insertion process, the spring limiting rod 441 is compressed. When the spring limiting rod 441 slides between the fixing block 47 and the movable block 48, the cleaning cotton 46 can be limited and fixed by the spring limiting rod 441, which provides convenience for subsequent use. The contents not described in detail in this instruction are existing technologies known to those skilled in the art.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A one-button temperature-controlled visual thermal surgical scalpel, comprising a scalpel body (1), characterized in that: The outer wall of the blade body (1) is provided with an insulation pad (11). A temperature adjustment button and a one-button temperature control button are installed on one end of the outer wall of the blade body (1) at the insulation pad (11). An electric heating transducer is provided inside the blade body (1). The electric heating transducer converts the electrical energy supplied by the power supply equipment into heat energy through leads and plugs. An electric heating blade head (2) is provided on one end of the inner wall of the blade body (1) at the electric heating transducer. A temperature display screen is embedded on the outer wall of the blade body (1). A storage component for driving the electric heating blade head (2) to move is provided inside the blade body (1). A cleaning component for wiping the electric heating blade head (2) is provided at the end of the outer wall of the blade body (1).

2. The one-button temperature-controlled visual thermal surgical scalpel according to claim 1, characterized in that: The storage assembly includes a rotating cylinder (31) located on the inner wall of the blade body (1). A transmission ring (32) is fixedly connected to one end of the rotating cylinder (31). A rotating block (33) is engaged on one side of the transmission ring (32). A slot matching the rotating block (33) is opened on the outer wall of the blade body (1).

3. The one-button temperature-controlled visual thermal surgical scalpel according to claim 2, characterized in that: The inner wall of the rotating cylinder (31) is provided with a fixed cylinder (34), which is connected to the inner wall of the cutter body (1). The outer circumference of the rotating cylinder (31) is symmetrically provided with a spiral groove (311), and the outer circumference of the fixed cylinder (34) is symmetrically provided with a limiting groove (341).

4. The one-button temperature-controlled visual thermal surgical scalpel according to claim 1, characterized in that: The electric heating blade (2) is connected to a mounting base (21) at one end. The mounting base (21) is symmetrically provided with sliders on its outer periphery, and the sliders are respectively inserted into the spiral groove (311) and the limiting groove (341).

5. The one-button temperature-controlled visual thermal surgical scalpel according to claim 1, characterized in that: The cleaning component includes an annular block (41) slidably connected to the outer wall of the blade body (1). Two sets of connecting seats are symmetrically fixedly connected to the end of the outer wall of the blade body (1), and a rotating shaft (451) is connected to the center of each of the two sets of connecting seats by a torsion spring. The two ends of the two sets of rotating shafts (451) extend to the outside of the connecting seats and are fixedly connected to a rotating seat (44).

6. The one-button temperature-controlled visual thermal surgical scalpel according to claim 5, characterized in that: The inner wall of the annular block (41) is rotatably connected to a connecting rod (45) via a connector. The end of the connecting rod (45) away from the annular block (41) is rotatably connected to the outer wall of the rotating shaft (451). A cavity is provided on the surface of the blade body (1) for the connecting rod (45) to move.

7. The one-button temperature-controlled visual thermal surgical scalpel according to claim 6, characterized in that: A connecting block (42) is fixedly connected to the center of the inner wall of the annular block (41). One end of the connecting block (42) is equipped with a reset spring connected to the inner wall of the blade body (1). The end of the connecting block (42) away from the reset spring is provided with a locking block (43). The top of the locking block (43) is equipped with a compression spring connected to the inner wall of the blade body (1). The surface of the connecting block (42) is provided with a locking groove that matches the locking block (43).

8. The one-button temperature-controlled visual thermal surgical scalpel according to claim 5, characterized in that: A circular groove is provided on one side surface of the rotating seat (44), and two sets of spring limiting rods (441) are symmetrically provided on the inner wall of the circular groove. A cleaning cotton (46) is installed on the side surface of the rotating seat (44) away from the rotating shaft (451). A fixing block (47) is connected to one side surface of the cleaning cotton (46) through a fixing rod, and a movable block (48) is slidably connected between the fixing block (47) and the cleaning cotton (46) on the outer wall of the fixing rod. The fixing block (47) and the movable block (48) are matched with the circular groove.