41 results about "Scalpel handle" patented technology

The utility model relates to a cervical conization knife, and belongs to the field of gynecological operation instruments. Comprising a knife handle and a detachable blade. And the front end 2 of the knife handle tilts and forms an angle with the longitudinal axis of the handheld end 1 of the knife handle. According to different angles between the longitudinal axis of the front end 2 of the scalpel handle and the longitudinal axis of the handheld end 1 of the scalpel handle, the scalpel is divided into three models of A, B and C which are respectively at angles of 27 degrees, 31 degrees and 37 degrees. The cross section of the blade body is arc-shaped, the radian is consistent with that of the cervix uteri, the arc length is 1 / 8 of the circumference of the cervix uteri, namely 1cm, the two sides of the blade are both blade faces 3, the front ends of the blade faces 3 converge to enable the blade tip 4 to be an arc-shaped triangle, the rear end 5 of the blade is a parallel blunt face, and the longitudinal axis of the blade is provided with scales 6. Compared with a traditional cold knife, the novel cervical cold knife can be applied to gynecology cervical cold knife conization, surgical operation is facilitated, a cut cone can be regular, cervical injury is reduced, and the shape and the function of the cervix are reserved to the maximum extent.

The ultrasonic scalpel handle comprises a handle body and a power connecting line, the handle body is provided with a mounting hole used for being connected with a scalpel, and the power connecting line comprises a conductive wire and a connecting base fixedly arranged at one end of the conductive wire. The other end of the electric lead is electrically connected with a circuit element located in the handle body, the connecting base is provided with a connecting structure used for being connected with an external power source, the connecting base can be inserted into the mounting hole in a matched mode, and the connecting base is inserted into the mounting hole in the front portion of the handle body during cleaning and disinfection. According to the handle, the mounting hole can be blocked, so that liquid is prevented from entering the inner cavity of the handle body from the mounting hole to damage internal circuit elements in the cleaning and disinfection process, the operation is convenient, and a waterproof end plug does not need to be additionally arranged; and the problems of independent storage, easy loss and the like caused by independent configuration of the waterproof end plug are avoided.

The invention discloses a dermatological scraping device, and relates to the field of medical instruments, the dermatological scraping device comprises a surgical knife handle and a scraping frame clamped on the surgical knife handle, a curled blade and a blade are slidably arranged on two sides of the scraping frame respectively, a spatula is slidably arranged at the end of the scraping frame, and the dermatological scraping device further comprises a sliding mechanism arranged on the scraping frame, the scraping frame is used for sliding adjustment of the curling blade, the blade and the spatula, the curling blade, the blade and the spatula are connected to the interior of the scraping frame in a limited and sliding mode through a plurality of limiting sliding blocks, so that the curling blade, the blade and the spatula can be stored in the scraping frame when not used, transportation and protection are facilitated, and when in use, the curling blade, the blade and the spatula can be stored in the scraping frame. The skin scraping device is simple in structure and convenient to use, can be pushed out in a sliding mode for use according to the skin scraping condition requirement of a patient, so that the situation that skin scraping and sampling are inconvenient is avoided, and the skin scraping and sampling convenience of the dermatology department is improved.

Title: power connection cable for ultrasonic scalpel handle; usage of the product of this design: the overall usage is ultrasonic scalpel handle for surgical procedures such as hemostatic separation of soft tissues and tissue coagulation; the local usage is that the connection cable on the handle connects to the power source; key points: the design is a partial design and doesn’t claim color protection; the protection is in the shape of the claimed parts; color is only for distinguishing protection scope; the content in yellow in each view is for protection, the content in grey is not for protection.

The utility model relates to the field of medical instruments, in particular to a surgical blade dismantling device. The surgical knife blade dismantling device comprises a box body and a cover body matched with the box body, an inserting notch for inserting a surgical knife is formed in the cover body, a knife retracting notch corresponding to the inserting notch is formed in the box body, and a knife dismantling mechanism is arranged in the cover body. According to the surgical knife blade dismantling device, through the cooperation of the box body, the cover body, the inserting notch, the knife retracting notch, the knife dismantling mechanism and the like, when the surgical knife blade dismantling device is used, a surgical knife is inserted from the inserting notch, a surgical knife handle is pressed downwards, the knife dismantling mechanism dismantles a surgical knife blade, the surgical knife blade is left in the box body, and the surgical knife handle retreats from the knife retracting notch; the scalpel blade is conveniently detached in a sealed environment, so that the pollution risk and the accidental injury risk are greatly reduced, and the potential safety hazard is reduced.

The radio frequency radio-wave knife comprises a knife handle, a knife head arranged on one side of the knife handle and a blade inserted into the knife head, the front face and the back face of the knife handle are both electrically connected with a control panel, and the control panel is used for sending electric signals to the knife handle to change the function. The front face and the back face of the cutter handle are fixedly connected with connecting blocks, the surfaces of the connecting blocks are movably connected with shielding plates through pin shafts, the sides, away from the connecting blocks, of the shielding plates extend to the outer side of the control panel, and the shielding plates can shield the control panel. The control panels are arranged on the front face and the back face of the scalpel handle, the movable shielding plates are arranged to shield the control panels, an effective anti-misoperation mechanism can be provided, a doctor can selectively expose or shield the control panels according to needs in the operation process, and therefore unnecessary misoperation is avoided, and the operation efficiency is improved. And the safety and the accuracy of the operation are improved.

The invention discloses an ultrasonic scalpel handle sterile connecting sleeve, and relates to the technical field of medical instruments, the ultrasonic scalpel handle sterile connecting sleeve comprises a fixing cylinder, a sealing member, a fixing member and a protective sleeve, the protective sleeve is used for sterile protection of the tail part of a scalpel handle part and a cable thereof; the bottom of the fixing cylinder is provided with an opening used for buckling the fixing cylinder on the tool bit part, and the opening enables the fixing cylinder to form a semi-open type inverted-U-shaped cover-shaped structure. The sealing piece comprises an air bag ring which surrounds the edge of the opening by a circle and is embedded in the fixing cylinder, and an inflation piece used for inflating the air bag ring. The fixing piece comprises a first pull rope used for hanging the front end of the tool bit part, a second pull rope used for hanging a handle of the tool bit part and a positioning piece used for abutting against the top face of the tool bit part. The fixing cylinder is buckled at the top of the handle of the scalpel head part, and a gap is filled through the air bag ring, so that the ultrasonic scalpel is adaptive to various ultrasonic scalpels, and the adaptability is higher; the fixing cylinder is tensioned and fixed on the tool bit handle through the two pull ropes, traditional binding is replaced, and operation is easy and convenient.

The utility model relates to the technical field of medical cutting tools, in particular to a medical hook knife which comprises a knife handle, a fixing mechanism is installed at the top of the knife handle, a ring body is installed on the surface of the fixing mechanism, a knife body main body is installed on the left side of the ring body, and a positioning mechanism is installed on the surface of the knife handle. The bottom of the surface of the knife handle is fixedly sleeved with an anti-skid handle, and the fixing mechanism comprises two short blocks. The pull block is pulled to drive the long rod to move, so that the upper end of the long rod is separated from an original clamping groove in the ring body, then the movable block moves, the second spring is stretched, the cutter body and the ring body are rotated, after adjustment is completed, the pull block is loosened, and the long rod is inserted into the clamping groove under the action of retraction of the second spring; therefore, the angle between the scalpel handle and the scalpel main body can be adjusted, the scalpel is suitable for various operation scenes, and flexibility and applicability are improved.

The utility model relates to the technical field of medical instruments, and discloses a medical pipe joint assembly and a medical scalpel handle thereof, the medical pipe joint assembly comprises a handle joint, a tool bit joint, an elastic lock pin and an operating piece, the handle joint is provided with a pipeline socket, a locking groove and an insertion channel, and the handle joint is provided with a clamping port; the clamping opening penetrates through the groove wall of the locking groove and communicates with the locking groove. The tool bit connector is provided with an insertion pipe channel, the insertion pipe channel is communicated with the insertion connection channel, one end of the periphery of the tool bit connector is connected with a clamping and locking block, the clamping and locking block is provided with a clamping and locking through groove, the clamping and locking block is inserted into the locking groove through the pipeline insertion opening and connected with the tool handle connector in a clamped mode, an opening of the clamping and locking through groove faces the clamping opening, and the elastic lock pin extends into the clamping opening and is connected to the clamping and locking through groove in a clamped mode. The operating piece is connected with the elastic lock pin and used for inserting the elastic lock pin into the clamping opening and the clamping through groove or pulling the elastic lock pin out of the clamping opening and the clamping through groove. According to the medical pipe joint assembly and the scalpel handle thereof, the elastic lock pin is easily separated from the clamping groove.

1. Name of this design: Home-use ultrasonic scalpel handle (desktop type, third generation). 2. Purpose of this design: For use in ultrasonic scalpel handles. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model discloses a scalpel handle feeding device for a scalpel assembly machine, which comprises a cabinet, and a vibration feeding assembly, a pushing assembly, a sliding material receiving assembly, a detection assembly and a transfer assembly which are arranged on the cabinet, the pushing assembly comprises a bracket and a material pushing rod which are oppositely arranged, and the material pushing rod is controlled by a material pushing air cylinder to stretch out and draw back; the sliding material receiving assembly comprises a material receiving seat and a transverse moving module, the material receiving seat is located below the feeding plate to receive the cutter handles, the material receiving seat moves to the position between the bracket and the material pushing rod through the transverse moving module, and the cutter handles in the material receiving seat are pushed into the bracket through the material pushing rod; the transferring module clamps the cutter handles in the bracket and transfers the cutter handles to the position above the detection group for visual detection, and qualified cutter handles are fed. According to the utility model, appearance detection is carried out while automatic feeding of the cutter handle is realized, and efficiency is improved while subsequent quality is guaranteed.

1. The name of the design product: the power connection line of the handle of the ultrasonic scalpel. 2. The use of the design product: the overall use is the handle of the ultrasonic scalpel for the hemostatic separation and coagulation of soft tissues; the local use is the connection line for connecting the power supply on the handle. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view. 5. Other circumstances that need to be explained: the design is a partial design, and the part other than the gray part in each view is the part to be protected.

The sheath installing mechanism for the scalpel assembling machine comprises a bracket, a pressing assembly located on one side of the bracket and a pushing-in assembly located on the other side of the bracket, a plurality of containing grooves are formed in the surface of the bracket at equal intervals, a scalpel handle is located at one end of each containing groove, and a scalpel sheath is located at the other end of each containing groove. The pressing assembly is located above the knife handle side of the containing groove, a lifting air cylinder is matched with a pressing block to press a knife handle, the pushing-in assembly is located on one side of a knife sheath, and a material pushing air cylinder is matched with a material pushing rod to push the knife sheath to the knife handle to achieve sheath installation. According to the automatic sheath loading device, automatic sheath loading is achieved through an automatic structure, and safety risks are reduced.

1. Name of the product in this design: Scalpel handle. 2. Application of this design: This design is used for the handle of a scalpel with adjustable angle and replaceable blade. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. If there is a magnified view from below, omit the bottom view; if there is a magnified view from above, omit the top view.

The invention relates to the technical field of intelligent recognition, in particular to an intelligent knife handle for a surgical robot, the tail of a knife handle seat is provided with a first connecting structure used for integrally mounting the knife handle at the execution end of the surgical robot, and the front of the knife handle seat is provided with a second connecting structure used for connecting a knife handle rod; the tail part of the cutter handle rod is detachably connected with the cutter handle seat through a second connecting structure; the front part of the cutter handle rod is provided with a mounting structure for connecting a cutter; the cutter is connected to the front end of the cutter handle rod through a mounting structure; an RFID identification device is mounted in one of the knife handle seat and the knife handle rod, and an RFID passive chip corresponding to basic information of a mounting base body of the knife handle seat or the knife handle rod is mounted in the other one of the knife handle seat and the knife handle rod; and the RFID identification device can communicate with the RFID passive chip and identify the RFID passive chip. The intelligent knife handle can achieve centralized knife management, accurate knife recording, tracking and life cycle management, can record the use frequency and the sterilization condition of the intelligent knife handle, and achieves data interaction with a corresponding control system.

The utility model relates to the technical field of medical instruments, and provides a die assembly for producing a scalpel handle. The die assembly for producing the scalpel handle comprises a device main body, a sliding block insert and a scalpel embedding part, wherein the device main body is provided with a mounting hole; the sliding block insert is detachably mounted in the mounting hole, the sliding block insert is provided with a knife handle head injection molding cavity and an insert mounting cavity, the knife handle head injection molding cavity and the insert mounting cavity are oppositely arranged, the sliding block insert is provided with a penetrating hole, and the penetrating hole is communicated with the knife handle head injection molding cavity and the insert mounting cavity; and the cutter embedding component is detachably mounted in the cutter embedding mounting cavity, and at least part of the cutter embedding component penetrates through the penetrating mounting hole and extends into the cutter handle head injection molding cavity. According to the mold assembly for producing the scalpel handle, through the detachable sliding block insert and the detachable cutter embedding part, when the cutter embedding part needs to be replaced, rapid disassembly and assembly can be achieved, and therefore the manufacturing cost of the scalpel handle is reduced, and the production efficiency is improved.

The utility model discloses a bending machine includes positioning mechanism, bending mechanism, and positioning mechanism includes the positioning groove for placing scalpel handle, the compacting block of compacting scalpel handle in the positioning groove, the compacting drive unit of drive compacting block moves up and down, and bending mechanism includes first bending axle, second bending axle and bending drive unit, first bending axle is located the side of positioning groove, bending drive unit is used for driving second bending axle rotation makes first bending axle and second bending axle respectively be located scalpel head both sides'scalpel head of misregistration bending, and the shortest distance between first bending axle and second bending axle can be adjusted relatively. When bending, can through the position of first bending axle or second bending axle is adjusted, makes the shortest distance of both change, thereby makes scalpel head bending different position, and through adjusting the rotation angle of second bending axle relative to first bending axle angle adjustment bending.

The utility model provides a posterior tooth surgical knife handle, which relates to oral cavity medical instruments and comprises a handle, the handle comprises a holding part and a bending part arranged at the end part of the holding part, a mounting part is formed at one end, far away from the holding part, of the bending part, and a clamping piece for fixing a blade is arranged on the mounting part; the holding part and the mounting part are arranged to be in a bending relation through the bending part, when the surgical knife is used, a doctor can be helped to conduct operations such as cutting and tissue separation better, the accuracy and safety of the operation are improved, meanwhile, the bending part can serve as a fulcrum to provide stable support and a proper angle for the blade, and the surgical knife is convenient to use. Therefore, a doctor can control the direction and the force of the blade more accurately.

The utility model relates to a positioning device for laser marking of an ultrasonic scalpel handle, which is provided with a working platform, an adjusting bottom plate is arranged on the working platform, a marking platform is arranged on the adjusting bottom plate, the adjusting bottom plate is connected to the working platform in a sliding manner, and the marking platform is connected to the adjusting bottom plate in a sliding manner; the marking platform is provided with a limiting rotating shaft and a limiting pressing block, the marking platform is provided with a leaning and pressing assembly, the leaning and pressing assembly comprises an adjusting groove, an adjusting handle, a transmission gear, a transmission rack, a limiting sliding groove, a limiting sliding block, an adjusting rotating rod, a rotating seat and a leaning and pressing plate, the adjusting handle comprises a rotating part and a rotating rod part, and the rotating part is provided with a transmission tooth part; one end of the rotating rod part and the rotating part are integrally formed, the other end of the rotating rod part extends out of the adjusting groove, locking sliding grooves are formed in the upper end face and the lower end face of the adjusting groove, a plurality of locking magnetic blocks are arranged in the locking sliding grooves, connecting magnetic blocks are arranged at the upper end and the lower end of the rotating rod part, and the diameter of the transmission gear is larger than that of the rotating part. The device is ingenious in structure, convenient and practical.

The cleaning box comprises a box body with a containing cavity, a supporting base and a waterproof plug, the supporting base and the waterproof plug are fixedly arranged on the box body and located in the containing cavity, when the ultrasonic scalpel handle is cleaned, the ultrasonic scalpel handle is placed in the containing cavity of the box body, the plug body is inserted into an installation hole in a matched mode, and the waterproof plug is inserted into the installation hole in a matched mode. And the ultrasonic scalpel handle is inserted into the clamping space in a manner that the opening part of the mounting hole faces downwards, so that the ultrasonic scalpel handle is fixed in the box body. In the process that the whole cleaning box is placed into cleaning equipment and is cleaned through spraying water and cleaning liquid, the mounting hole is blocked, and the liquid is prevented from entering an inner cavity of the ultrasonic scalpel handle. Meanwhile, the ultrasonic scalpel handle to be cleaned can be borne through the box body at the same time, the ultrasonic scalpel handle can be effectively protected, the ultrasonic scalpel handle can be integrally carried or automatically carried through a mechanical device, and the risk that the ultrasonic scalpel handle directly falls on the ground and is damaged is avoided or reduced.

1. The name of the design product: the handle of ultrasonic knife. 2. The use of the design product: for the handle of ultrasonic knife. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view.

The utility model discloses an improved high-frequency electrocoagulation scalpel, which relates to the field of medical appliances and comprises a scalpel handle, a scalpel head part arranged at the lower end of the scalpel handle and a conductive wire positioned in the scalpel handle. Wherein a detachable transparent insulating module is arranged on the working surface of the knife head part, is made of a biocompatible high polymer material, and is connected with the knife head part through a rotary buckling mechanism, so that mechanical fixation and electrical isolation are realized. The high-frequency electrocoagulation scalpel has the functions of accurate and synchronous infusion of liquid medicine, visual channel monitoring and modular maintenance, and through structural optimization and innovation of a control system, the operation efficiency and safety in an operation are substantially improved.

The invention discloses a scalpel for cutting connective tissue transplantation bodies on the palatal side of the upper jaw in a layered mode, and belongs to the technical field of oral cavity medical instruments. The scalpel comprises a scalpel handle, a connecting rod and a layered cutting head end arranged at the far end of the connecting rod. The layered cutting head end comprises a pair of parallel blades, a pair of depth limiting baffles and a tissue separation block arranged between the parallel blades. Through the width adjusting mechanism and the depth adjusting mechanism, the width and the cutting depth of the transplanting body can be accurately set. In the cutting process, the tissue separation block can separate keratinized gingiva on the surface layer from deep tissue in situ, so that a pure connective tissue transplant is obtained at a time, and meanwhile, surface epithelium and deep fat gland tissue of a donor region are completely reserved. Accurate, minimally invasive and integrated connective tissue cutting is achieved, surgical operation is simplified, the technical threshold is lowered, the pain of a patient is relieved, and the transplantation success rate is increased.

The utility model provides an ultrasonic scalpel handle capable of being repeatedly used, and aims to integrate a transducer into the ultrasonic scalpel handle and uniformly supply power to the ultrasonic scalpel handle, so that a mammary gland puncture ultrasonic scalpel is more convenient to install and use. The ultrasonic surgical knife handle comprises a knife handle upper shell, a knife handle lower shell, a driving structure, a transducer power supply structure, a PCBA board, keys, a light guide column, an insertion block and the like. The driving structure is used for achieving automatic cutting of the ultrasonic cutter bar after the ultrasonic operation cutter and the ultrasonic operation cutter handle are assembled. The energy converter power supply structure comprises an energy converter adopting a wireless contact type power supply design and is used for realizing energy connection between the ultrasonic surgical knife handle and the energy converter.

The utility model discloses a disposable blade assembly of a safety scalpel. The disposable blade assembly is provided with a blade, a blade seat and a blade protection sleeve. The blade seat is connected with a first elastic arm, and a first protruding point is arranged on the first elastic arm in a protruding mode. A first limiting part corresponding to the first convex point is arranged on the blade protection sleeve, and first locking is formed by limiting the first convex point through the first limiting part; the blade protection sleeve is connected with a second elastic arm, and a second convex point is convexly arranged on the blade protection sleeve towards the blade seat; a second limiting part corresponding to the second convex point is arranged on the blade seat, and second locking is formed by limiting the second convex point through the second limiting part; the second elastic arm is positioned above the first elastic arm; during unlocking, the second elastic arm is pressed to deform, and meanwhile, the first elastic arm is acted to deform together; and when the two elastic arms deform, the first locking and the second locking are released. During use, unlocking at two positions can be achieved through one-time pressing, after use, the knife handle can be prevented from being inserted into the blade base again to be combined with the blade base, and the risk of repeated use is avoided.

The application discloses a multifunctional plasma scalpel and belongs to the technical field of surgical medical instruments. The scalpel comprises a scalpel head, a scalpel rod main body, a scalpel handle, a gas source pipe, a gas cylinder, a liquid injection pipe and a suction pipe. The scalpel head comprises, from outside to inside, a rubber pipe, a stainless steel pipe and a ceramic insulation head which are sequentially nested, and an ablation electrode, a jet assembly and a suction port which are arranged on the ceramic insulation head. A function button is arranged on the scalpel handle to switch the working mode of the scalpel. The ablation electrode is annular semicircular and is composed of segmented electrodes to cut target tissues. The jet assembly comprises, sequentially nested, a metal electrode, a quartz glass pipe and a metal electrode, and a hole at one end of the jet assembly serves as a jet hole. Working gas in the gas cylinder enters the jet assembly through the gas source pipe, and jetting is performed on target tissues to achieve rapid blood coagulation or fine cutting. The cut tissues are sucked into the suction port and then discharged through the suction pipe connected with the scalpel handle. The multifunctional scalpel can realize convenient switching of multiple functions, effectively shorten the operation time and accelerate the recovery of patients.

This utility model discloses an ultrasonic scalpel handle, including a handle body and a power connection cable. The handle body has a mounting hole for connecting the scalpel. The power connection cable includes a conductive wire and a connector fixed at one end of the conductive wire. The other end of the conductive wire is electrically connected to a circuit element located in the handle body. The connector has a connection structure for connecting to an external power source. The connector can be inserted into the mounting hole. During cleaning and disinfection, inserting the connector into the mounting hole at the front of the handle body can seal the mounting hole, thereby preventing liquid from entering the inner cavity of the handle body from the mounting hole during cleaning and disinfection and causing damage to its internal circuit elements. This is not only convenient to operate, but also eliminates the need for a separate waterproof end plug, avoiding the problems of needing to store the waterproof end plug separately and being easily lost.

The utility model discloses a transducer shell for ultrasonic scalpel, including front shell, middle shell and back shell, middle shell is connected between the front shell and back shell, wherein the front shell and back shell are both made of hard plastic material, the middle shell is made of flexible plastic material or silica gel material, the back shell is made of flexible plastic material or silica gel material, and the back shell is made of flexible plastic material or silica gel material. The hardness of the front shell and the hardness of the rear shell are both larger than the hardness of the middle shell. Therefore, an elastic component does not need to be arranged when the transducer is installed, the overall structure of the transducer shell is simpler, the production and assembly processes are more convenient and fast, the overall weight of the transducer shell can be greatly reduced, and the production cost is reduced. The overall weight of the transducer assembly and the weight of the ultrasonic scalpel handle provided with the transducer assembly are correspondingly reduced, the hand operation burden of an operation operator is relieved, and implementation of a fine operation and a long-time complex operation is facilitated.

This invention relates to a multi-frequency coupled vibration ultrasonic scalpel, comprising: a scalpel handle; at least two piezoelectric ceramic groups, each having a corresponding resonant frequency of the same order when excited; at least one insulating block located between two adjacent piezoelectric ceramic groups; a connecting rod connected to the scalpel handle, with the piezoelectric ceramic groups and the insulating block passing through the connecting rod and pressed against each other; exciting at least one piezoelectric ceramic group to vibrate at at least two resonant frequencies, or exciting at least two piezoelectric ceramic groups to vibrate at at least one resonant frequency, so that the scalpel handle vibrates at a frequency resulting from the coupling of at least two resonant frequencies generated by the piezoelectric ceramic groups. This invention has multiple resonant frequencies and can be driven simultaneously by alternating current corresponding to each frequency, thereby generating multi-frequency coupled vibration at the scalpel tip to improve the cutting and coagulation effects on tissues.

The utility model relates to a scalpel for ophthalmologic operations, in particular to a scalpel capable of rapidly replacing a scalpel head for ophthalmologic operations. The disposable scalpel aims to solve the problem that as a scalpel head and a scalpel handle of an existing disposable scalpel for the ophthalmology department are integrally formed, the scalpel head and the scalpel handle need to be completely discarded after being used every time, and large waste is caused. The tool comprises a tool bit, a tool handle and a locking sliding block, a positioning protrusion and a locking boss are sequentially arranged on the upper surface of the rear portion of the tool bit from front to back, an inserting opening is formed in the front end of the tool handle, a positioning hole and a locking hole are sequentially formed in the upper surface of the front end of the tool handle from front to back, the rear end of the tool bit is inserted into the inserting opening, the locking boss is inserted into the locking hole, and the locking sliding block is arranged on the upper surface of the tool handle. The locking sliding block can linearly reciprocate in the length direction of the upper surface of the cutter handle, an inserting opening is formed in the front end of the locking sliding block, and after the locking sliding block moves to the front end of the upper surface of the cutter handle, the locking boss is inserted into the inserting opening. The utility model belongs to the field of medical instruments.