CN112617977B

CN112617977B - Rotary cutter

Info

Publication number: CN112617977B
Application number: CN202011633410.1A
Authority: CN
Inventors: 钟鸣; 刘男; 岳计强; 程达
Original assignee: Hangzhou Kangji Medical Instrument Co Ltd
Current assignee: Hangzhou Kangji Medical Instrument Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-08-30
Anticipated expiration: 2040-12-31
Also published as: CN112617977A

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a rotary cutter. The invention provides a rotary cutter aiming at solving the problem that the prior art can not realize the efficient and convenient operation of tumor full-isolation excision, which comprises an operating handle, wherein a rotary cutting driving device is arranged in the operating handle, the rotary cutting driving device is connected with a rotary cutting cutter rod positioned outside the operating handle through a main shaft assembly, a rotary cutter head is arranged at the outer end of the rotary cutting cutter rod, a limiting piece is fixed on the operating handle, the limiting piece extends to the rotary cutter head, a limiting part with the outer end axially exceeding the outer end of the rotary cutter head is arranged on the limiting piece, and the limiting part is positioned at one side of the rotary cutter head. The limiting piece for limiting the tumor position is arranged on the side face of the rotary cutter head, so that the side face is not required to extend into the clamping jaw for fixing during cutting, and compared with a punching type cutting method, the cutting efficiency is higher by utilizing the side face of the rotary cutter head for cutting.

Description

Rotary cutter

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a rotary cutter.

Background

In the tumor resection operation, taking hysteromyoma as an example, after tumor resection, because the tumor volume is large and can not be directly taken out from the working channel established by the puncture outfit, the rotary cutter is needed to firstly smash the resected tumor in the body of a patient and then take out the tumor through the working channel. To prevent secondary infection, this shredding process must be performed in an isolation bag that is completely isolated from other tissues in the patient.

The rotary cutter in the prior art mostly adopts an annular naked cutter head at the position for realizing cutting, and the tumor is cut and smashed through the rotary cutter head. However, the tumor is in a free state after being cut, and the tumor is cut only by a rotating cutter head, and the tumor or the tumor and the cutter head rotate synchronously, so that the tumor cannot be cut and smashed effectively. Therefore, in the prior art, the tumor is generally fixed or limited in two ways: 1. a clamping jaw extends from the side surface to clamp the tumor for fixation; 2. a clamping jaw extends into the middle through hole of the rotary cutter to clamp the tumor for fixation. However, in the first method, a new working channel needs to be established on the side surface, and an opening needs to be additionally arranged on the isolation bag, so that the wound surface of a patient is increased, and the isolation effect is reduced. The second method is a punching type cutting method, namely the practical operation effect is that a plurality of through holes are punched on the tumor, the whole tumor is broken by increasing the number of the through holes, and the efficiency is extremely low. Therefore, it is highly desirable to provide a rotary cutter to facilitate the efficient and convenient operation of tumor total-isolation resection.

For example, the chinese utility model patent discloses a uterus rotary cutter for gynecological surgery [ application number: 201921033166.8], the utility model discloses a include the shell, fixed cup joint has motor element in the shell, and one side fixedly connected with handle of shell bottom, the left side of handle is provided with control switch, and the bottom on handle right side is provided with the electricity joint that is linked together with motor element, the bottom of handle still is provided with the thread head, and the handle has the pressure atomizer through thread head threaded connection, motor element's left side is provided with the output pole, the last fixed cup joint of output pole has the rotary cutter.

The utility model discloses a patent has disinfection effectual, can effectively exterminate the bacterium, has avoided the art time because of the bacterial infection to the healthy advantage that causes the threat of patient, but the cutting position of its rotary cutter that provides still is an annular naked tool bit, so have above-mentioned unable tumour of realization keep apart completely and amputate the problem that the operation is high-efficient, conveniently goes on.

Disclosure of Invention

The invention aims to solve the problems and provides a rotary cutter which is convenient for tumor full-isolation resection operation.

In order to achieve the purpose, the invention adopts the following technical scheme:

a rotary cutter comprises an operating handle, wherein a rotary cutting driving device is arranged in the operating handle, the rotary cutting driving device is connected with a rotary cutting cutter rod positioned outside the operating handle through a main shaft assembly, a rotary cutting cutter head is arranged at the outer end of the rotary cutting cutter rod, a limiting piece is fixed on the operating handle, the limiting piece extends to the rotary cutting cutter head and is provided with a limiting part, the outer end of the limiting piece axially exceeds the outer end of the rotary cutting cutter head, and the limiting part is positioned on one side of the rotary cutting cutter head.

In the above rotary cutter, the limiting member is a limiting sleeve, an inner end of the limiting sleeve is fixedly connected with an auxiliary shaft assembly fixed in the operating handle, the auxiliary shaft assembly is sleeved on the periphery of the main shaft assembly, and a bearing is arranged between the auxiliary shaft assembly and the main shaft assembly.

In the above rotary shaver, the rotary cutter bar is tubular, and the rotary cutter head includes a plurality of annular rotary cutter teeth formed at an end of the rotary cutter bar.

In the above rotary shaver, the limiting portion is arc-shaped, and the radian of the limiting portion is 45 to 75 degrees.

In the above rotary cutter, the operating handle is provided with a power main body inside, the main shaft assembly includes a main shaft, a gear which is in driving connection with the power main body is fixedly connected to the main shaft, the main shaft is in driving connection with the rotary cutter bar, the second bearing is connected outside the main shaft, a clutch assembly is further arranged between the main shaft and the rotary cutter bar, and the main shaft drives the rotary cutter bar to rotate through the clutch assembly.

In the above rotary cutter, the clutch assembly includes an annular joint located between the rotary cutter bar and the spindle, the annular joint is fixedly connected with the rotary cutter bar, the outer surface of the annular joint has a plurality of connecting slots recessed toward the inside of the annular joint, the spindle is fixedly connected with a spindle nut, the clutch plate is rotatably connected to the spindle nut, one end of the clutch plate is fixedly connected with a connecting plug pin, the other end of the clutch plate is connected with a return spring, the connecting plug pin penetrates through the spindle and extends into the connecting slots, one end of the return spring is pressed on the spindle or the spindle nut, and the connecting plug pin can move and be released out of the connecting slots by compressing the return spring; the spread groove is equipped with a plurality of, and follows annular joint circumference evenly distributed.

In the above rotary cutter, the power main body includes a motor package and a motor located in the motor package, the motor outputs motor power to the outside of the motor package through a power output structure connected to the motor package, the power output structure is hermetically connected to the motor package, a power supply structure and a proximity switch controlled by a proximity control element arranged outside the motor package to be switched on and off are further packaged in the motor package, and the motor, the proximity switch and the power supply structure are electrically connected to form a series loop.

In the above rotary shaver, the power supply structure includes a power supply connector, the power supply connector is inserted into the motor package and is hermetically connected to the motor package, and the power supply connector is directly connected to the series circuit or is connected to the series circuit through a storage battery; or the power supply structure comprises a wireless rechargeable battery packaged in a motor packaging body; the power main body is a cylindrical body, the power output structure is positioned at the upper end of the cylindrical body, and the power supply joint is positioned at the lower end of the cylindrical body; the outer end of the power output structure is provided with a power clutch structure; the power main body is further provided with a mounting structure detachably connected to the handheld medical instrument, and the power clutch structure is connected with a working part of the handheld medical instrument after the power main body is mounted on the handheld medical instrument.

In the above rotary cutter, the power output structure includes a coupling body, a sealing plate is arranged on the inner side of the upper end of the motor packaging body, the coupling body is cylindrical and penetrates through the sealing plate in a circumferential dynamic sealing manner, the power shaft of the motor is tightly inserted into the inner end of the coupling body, and the power clutch structure includes a concave-convex butt joint structure arranged at the outer end of the coupling body.

In the above rotary cutter, the motor is fixed in the motor package through the motor positioning structure, the motor positioning structure includes a positioning cylinder body which is tightly fitted around the periphery of the motor, the lower end of the positioning cylinder body is provided with a plurality of axially extending positioning grooves, the inner wall of the motor package is provided with a plurality of axially extending positioning raised lines, the positioning raised lines are inserted into the positioning grooves in a one-to-one correspondence manner, and the upper end of the motor abuts against the annular step on the inner wall of the motor package.

Compared with the prior art, the invention has the advantages that:

1. the limiting piece for limiting the tumor position is arranged on the side face of the rotary cutter head, so that the side face does not need to extend into the clamping jaw to be fixed during cutting, and compared with a punching type cutting method, the rotary cutter head has higher cutting efficiency by utilizing the side face cutting.

2. The size of the limiting part is in a proper range, and the reliability of limiting the tumor and the cutting efficiency of the rotary cutter head are both considered.

3. The power main body controls the on-off of the motor by using the proximity switch, so that a mechanical button is not required to be arranged on the motor packaging body, the whole motor packaging body has better sealing performance, and high-temperature and high-pressure steam sterilization can be carried out.

4. The invention is provided with the reversing assembly capable of changing the relative movement direction between the button and the insert, so that the setting position of the button has larger selection space, and meanwhile, the reversing assembly has simple and small structure and stable transmission.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic structural view of a portion of the structure of the present invention;

FIG. 4 is a cross-sectional view of a portion of the structure of the present invention;

FIG. 5 is a cross-sectional view of the clutch assembly;

FIG. 6 is a schematic structural view of a power body;

FIG. 7 is a schematic structural view of the locking mechanism;

in the figure: the rotary cutting tool comprises a rotary cutting tool bar 1, a rotary cutting tool bit 2, a rotary cutting driving device 3, a limiting piece 4, a secondary shaft 5, a primary shaft nut 30, a primary shaft 31, a gear 32, a secondary bearing 33, a clutch assembly 34, an annular joint 35, a connecting groove 36, a clutch sheet 37, a connecting bolt 38, a return spring 39, a mounting seat 41, a limiting sleeve 42, a limiting part 43, a first bearing 45, a power supply structure a, a power supply joint b, a control element c, a control button d, a control body e, a power clutch structure f, a coupling body g, a sealing plate h, a primary shaft assembly i, a secondary shaft assembly j, a power main body 100, a motor package 101, a motor 102, a power output structure 103, an approach switch 104, a positioning cylinder 105, an assembly step 106, an expansion part 107, an elastic gasket 108, a mounting structure 109, an operating handle 200, a mounting channel 201, a locking mechanism 300, a button 301, an insert 302, a reversing assembly 303, a first reversing shaft 304, a second bearing, A second reversing shaft 305, a swing arm 306, a sliding block 307, an eccentric wheel 308, a guide inclined plane 309 and a deformation gap 310.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description.

Referring to fig. 1 and fig. 2, a rotary cutter includes an operating handle 200 and a power main body 100 installed on the operating handle 200, the operating handle 200 includes a rotary cutter outer shell 201, the power main body 100 is installed on the rotary cutter outer shell 201, a rotary cutter driving device 3 in driving connection with the power main body 100 is further installed in the rotary cutter outer shell 201, one end of a rotary cutter bar 1 is connected to the rotary cutter driving device 3, the other end of the rotary cutter bar extends to the outside of the rotary cutter outer shell 201, one end of the rotary cutter bar 1 extending to the outside of the rotary cutter outer shell 201 is provided with a rotary cutter head 2, a limiting member 4 is fixedly arranged on the periphery of the rotary cutter head 2, the limiting member 4 is located on one side of the rotary cutter head 2, and the outer end of the limiting member 4 exceeds the outer end of the rotary cutter head 2.

When the device is used, the power main body 100 drives the rotary cutting driving device 3 to drive the rotary cutting tool bar 1 to rotate, the rotary cutting tool bit 2 and the rotary cutting tool bar 1 synchronously rotate, the limiting piece 4 limits and positions the tumor, so that the tumor cannot synchronously rotate in the same direction under the driving of the rotary cutting tool bit 2, the tumor is cut on the side face of the rotary cutting tool bit 2, and the tumor is gradually cut and reduced in the process of round peeling like an apple until the tumor can be taken out through the working channel. Therefore, the limiting piece 4 for limiting the tumor position is arranged on the side surface of the rotary cutter head 2, so that the side surface is not required to extend into the clamping jaw for fixing during cutting, and compared with a punching type cutting method, the cutting efficiency is higher by utilizing the side surface of the rotary cutter head 2 for cutting.

Specifically, the limiting member 4 is formed and axially protrudes from an end portion of the limiting sleeve 42, the limiting sleeve 42 is fixedly disposed, the rotary cutting tool bar 1 is rotatably disposed in the limiting sleeve 42 in a penetrating manner, an auxiliary shaft 44 connected to the rotary cutting driving device 3 through a first bearing 45 is disposed at one end of the limiting sleeve 42 away from the limiting member 4, and the mounting seat 41 is detachably connected to the auxiliary shaft 44. The first bearing 45 allows the auxiliary shaft 44 to be supported by the rotary cutting driving device 3 in the radial direction, but cannot be driven to rotate by the rotary cutting driving device 3. Meanwhile, the auxiliary shaft 44 can be fixedly connected to the outer housing of the rotary cutter, which facilitates the installation and fixation of the mounting seat 41 and the limiting sleeve 42.

Preferably, one end of the limiting member 4 away from the limiting sleeve 42 extends to the front end of the rotary shaver head 2, and the width of the limiting member 4 gradually decreases from the end close to the limiting sleeve 42 to the end away from the limiting sleeve 42. The limiting piece 4 is arc-shaped, and the radian of the limiting piece 4 is 45-75 degrees. That is, the limiting member 4 protrudes to the outside of the end of the rotary cutter head 2 away from the rotary cutter holder 1, and the radian of the limiting member 4, which is flush with the rotary cutter head 2 and protrudes to the outside of the end of the rotary cutter head 2 away from the rotary cutter holder 1, is 45-75 degrees, preferably about 60 degrees, which can cover about 60 degrees, that is, one sixth of the area of the rotary cutter head 2. The size of the limiting piece 4 is in a proper range, and the reliability of limiting the tumor and the cutting efficiency of the rotary cutter head 2 are both considered.

As shown in fig. 3, the rotary cutter bar 1 is tubular, so that the rotary cutter bar 1 is driven to rotate stably. The rotary cutter head 2 comprises a plurality of rotary cutter tooth edges 21 which are formed at the end part of the rotary cutter bar 1 and are arranged in a ring shape, thus ensuring the continuous cutting of the tumor without interruption, and improving the cutting efficiency.

As shown in fig. 4, the rotary-cut driving device 3 includes a main shaft 31, a gear 32 in driving connection with the power main body 100 and fixedly connected to the main shaft 31, the main shaft 31 and the rotary-cut tool bar 1 being in driving connection, and a second bearing 33 fixedly connected to the rotary-cut device outer housing 201, wherein the second bearing 33 is sleeved on the main shaft 31. The second bearing 33 can provide radial support for the spindle 31 mounted to the outer peeler housing 200 while ensuring smooth rotation of the spindle 31.

When in use, the power body 100 drives the main shaft 31 through the driving gear 32, thereby driving the rotary cutter bar 1 to rotate.

As shown in fig. 4 and 5, a clutch assembly 34 is further disposed between the main shaft 31 and the rotary cutter bar 1, and the main shaft 31 drives the rotary cutter bar 1 to rotate through the clutch assembly 34. The clutch assembly 34 includes an annular joint 35 located between the rotary cutter bar 1 and the spindle 31, the annular joint 35 is fixedly connected to the rotary cutter bar 1, the outer surface of the annular joint 35 has a plurality of connecting grooves 36 recessed into the annular joint 35, the spindle 31 is fixedly connected to the spindle nut 30, the clutch plate 37 is rotatably connected to the spindle nut 30, one end of the clutch plate 37 is fixedly connected to a connecting bolt 38, the other end of the clutch plate is connected to a return spring 39, the connecting bolt 38 penetrates through the spindle 31 and extends into the connecting groove 36, one end of the return spring 39 is pressed on the spindle 31 or the spindle nut 30, and the return spring 39 is compressed to enable the connecting bolt 38 to move and be disengaged from the connecting grooves 36. Pressing one end of the clutch plate 37 compresses the return spring 39, and the clutch plate 37 rotates around the hinge point to release the connecting pin 38 out of the connecting groove 36, so that the spindle 31 and the rotary cutter holder 1 are disengaged from each other. When the external force of the clutch plate 37 is removed, the clutch plate 37 is rotated and reset under the action of the elastic force of the reset spring 39, and the connecting latch 38 is reinserted into the connecting groove 36, at this time, the spindle 31 is connected with the rotary cutter bar 1.

Preferably, the connecting grooves 36 are provided in several numbers and are evenly distributed along the circumferential direction of the annular joint 35. This facilitates insertion of the connector pin 38 into the connector slot 36 during installation.

Referring to fig. 2 and 6, the power main body 100 includes a motor package 101 and a motor 102 located in the motor package 101, one end of a power output structure 103 is connected to the motor 102, and the other end extends out of the motor package 101, the power output structure 103 is connected to the motor package 101 in a sealing manner, and the sealing between the power output structure 103 and the motor package 101 can be achieved by using a rotary sealing structure commonly used in the art, for example, the rotary sealing structure can be composed of a slip ring made of filled polytetrafluoroethylene and a rubber O-ring providing elastic force. The motor packaging body 101 further comprises a proximity switch 104 capable of controlling the motor 102 to be turned on and off, the proximity switch 104 is in a conducting or cut-off state along with the fact that a control piece c externally arranged outside the motor packaging body 101 is close to or far away from the proximity switch 104, and the control piece c is movably arranged on the handheld medical instrument. The proximity switch 104 may be selected from the class of proximity switches commonly used in the art, but preferably the proximity switch 104 is a hall switch. The control piece c comprises a control button d and a control body e fixed at the inner end of the control button d. Wherein the control body e is a magnet; the control button d axially movably penetrates through the operating handle 200 in a limiting manner, and a return spring is arranged between the control button d and the operating handle 200. The return spring can ensure that the control button d performs rebound reset after the external force is removed. The motor 102 is connected with a power supply structure a, the motor 102, the proximity switch 104 and the power supply structure a are electrically connected to form a series circuit, the power supply structure a comprises a power supply connector b penetrating through the motor packaging body 101, the power supply connector b penetrates through the motor packaging body 101 and is hermetically connected with the motor packaging body 101, and the power supply connector b is directly connected with the series circuit or is connected with the series circuit through a storage battery; or the power supply structure a comprises a wireless rechargeable battery packaged in the motor package 101.

When the rotary cutting tool is used, the control button d arranged on the handheld medical instrument is pressed, the control body e at the end part of the control button d approaches and triggers the proximity switch 104 to enable the proximity switch 104 to start the motor 102, and the motor 102 outputs driving force through the power output structure 103 to drive the rotary cutter on the handheld medical instrument to perform rotary cutting. Therefore, the invention controls the opening and closing of the motor 102 by using the proximity switch 104, so that a mechanical button is not required to be arranged on the motor packaging body 101, the whole motor packaging body 101 has better sealing performance, and high-temperature and high-pressure steam sterilization can be carried out.

As shown in fig. 3, the power main body 100 is a cylindrical body, the power output structure 103 is located at the upper end of the cylindrical body, and the power supply connector b is located at the lower end of the cylindrical body; namely, the power output structure 103 and the power supply connector b are respectively arranged at two ends, so that the structure arrangement is convenient. The power clutch structure f is arranged at the outer end of the power output structure 103 and can control whether the power of the power output structure 103 can be input into the handheld medical instrument or not; the power main body 100 is further provided with a mounting structure 109 detachably connected to the handheld medical instrument, and the power clutch structure f is connected with a working part of the handheld medical instrument after the power main body 100 is mounted on the handheld medical instrument.

Specifically speaking, power take off structure 103 includes shaft coupling body g, motor packaging body 101 upper end inboard is equipped with shrouding h, shaft coupling body g is the tube-shape and wears to locate shrouding h with circumference dynamic seal, motor 102's power axle tight fit is inserted in shaft coupling body g the inner, power clutch structure f is including the unsmooth butt joint structure who locates shaft coupling body g outer end, through the unsmooth structure whether butt joint control separation and reunion relatively. The sealing plate h is used to ensure the sealing between the coupling body g and the power body 100.

As shown in fig. 3, the motor 102 is fixed in the motor package 101 by a motor positioning structure. Wherein, motor location structure includes that the tight fit ground overlaps in motor 102 outlying location barrel 105, location barrel 105 lower extreme is opened there are a plurality of axially extended constant head tanks 110, motor packaging body 101 inner wall is equipped with a plurality of axially extended location sand grips, the location sand grip one-to-one is inserted in constant head tank 110, motor 102 upper end supports and leans on in motor packaging body 101 inner wall's annular step 111. The positioning slot 110 and the positioning protrusion strip cooperate with each other to limit and fix the motor 102.

As shown in fig. 2 and fig. 3, the lower end of the motor package 101 has an enlarged part 107, and an assembly step 106 is formed between the upper end of the enlarged part 107 and the motor package 101; the power feeding structure a is provided in the enlarged portion 107. After the assembly is completed, the expansion part 107 is pressed on the handheld medical device, so that a certain positioning effect is achieved.

Preferably, an elastic washer 108 is further included, which is disposed between the enlarged portion 107 and the handheld medical device. This may reduce the impact forces that may be generated between the bulge 107 and the handheld medical device when the bulge is mounted to the handheld medical device.

As shown in fig. 2 and 7, the operating handle 200 is further provided with a locking mechanism 300, the surface of the motor package 101 is provided with a mounting structure 109 recessed towards the inside of the motor package 101, and one end of the locking mechanism 300 can be inserted into or separated from the mounting structure 109. The locking mechanism 300 comprises a button 301 movably linked to the operating handle 200 and an insert 302 capable of being inserted into or separated from the mounting structure 109, the button 301 and the insert 302 are connected through a reversing assembly 303, and when the button 301 is moved, the reversing assembly 303 drives the insert 302 to move along a direction perpendicular to the moving direction of the button 301. The invention is provided with the reversing component 303 which can change the relative movement direction between the button 301 and the insert 302, so that the setting position of the button 301 has larger selection space, and meanwhile, the reversing component 303 has simple and small structure and stable transmission.

Preferably, the end of the insert 302 adjacent to the power body 100 is provided with a guide bevel 309. The guide ramp 309 provides a guide for facilitating insertion of the insert 302 into the mounting structure 109 when the power body 100 is mounted to the operating handle 200.

As shown in fig. 7, the reversing assembly 303 includes a first reversing shaft 304 and a second reversing shaft 305, which are arranged in parallel, the first reversing shaft 304 and the second reversing shaft 305 are fixedly connected through a swing arm 306, an end of the first reversing shaft 304, which is away from the swing arm 306, extends into the button 301, an end of the second reversing shaft 305, which is away from the swing arm 306, is sleeved with a sliding block 307, the insert 302 is fixedly connected to the sliding block 307, an eccentric 308 is further arranged between the second reversing shaft 305 and the sliding block 307, the second reversing shaft 305 is fixedly connected with the eccentric 308, and the eccentric 308 is pressed on an inner surface of the sliding block 307 by rotating the second reversing shaft 305.

In use, when the button 301 is pressed, the button 301 applies a pressure to the first reversing shaft 304 to move the first reversing shaft 304 backward, the first reversing shaft 304 drives the second reversing shaft 305 through the swing arm 306, so that the second reversing shaft 305 drives the eccentric wheel 308 to rotate, the eccentric wheel 308 rotates and presses the inner surface of the sliding block 307, so that the sliding block 307 moves leftward, and the insert 302 is removed from the mounting structure 109. Instead, the insert 302 is embedded in the mounting structure 109.

Preferably, one end of the insert 302 is fixedly connected to the sliding block 307, and the other end of the insert extends to below the sliding block 307, and a deformation gap 310 is provided between the insert 302 and the sliding block 307, and the insert 302 is made of a plastic material capable of deforming. After the pressure is applied, the insert 302 can deform to bend into the deformation gap 310, and after the pressure is removed, the insert 302 can rebound to reset. This facilitates the installation of the power body 100 and also enhances the locking force on the power body 100 after the insert 302 is inserted into the mounting structure 109.

The working principle of the invention is as follows: when the device is used, the power main body 100 slides into the operating handle 200 until the insert 302 is embedded into the mounting structure 109 to complete mounting, the expansion part 107 is pressed on the operating handle 200 at this time, the start button mounted on the operating handle 200 is pressed, the proximity switch 104 is triggered to enable the proximity switch 104 to start the motor 102, the motor 102 drives the gear 32 through the power output structure 103, the gear 32 drives the main shaft 31 to make synchronous rotating motion, the main shaft 31 drives the rotary cutter bar 1 to rotate through the clutch component 34, at this time, the limiting part 43 on the limiting component 4 carries out limiting positioning on the tumor, so that the tumor cannot rotate synchronously in the same direction under the driving of the rotary cutter head 2, the tumor is cut on the side surface of the rotary cutter head 2, and the tumor is gradually cut and reduced in the process of peeling like an apple until the tumor can be taken out through the working channel. When the power main body 100 needs to be disassembled for sterilization after the operation is completed, the button 301 is pressed, the button 301 applies a pressure to the first reversing shaft 304 to enable the first reversing shaft 304 to move backwards, the first reversing shaft 304 drives the second reversing shaft 305 through the swing arm 306, the second reversing shaft 305 drives the eccentric wheel 308 to rotate, the eccentric wheel 308 rotates and presses the inner surface of the sliding block 307, the sliding block 307 moves leftwards, the insert 302 is separated from the mounting structure 109, and at the moment, the power main body 100 is taken out. Therefore, the limiting component 4 for limiting the tumor position is arranged on the side surface of the rotary cutter head 2, so that the side surface is not required to extend into the clamping jaw for fixing during cutting, and the cutting efficiency is higher by utilizing the side surface of the rotary cutter head 2 for cutting compared with a punching type cutting method.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the rotary cutting tool holder 1, the rotary cutting head 2, the rotary cutting driving device 3, the limit component 4, the auxiliary shaft 5, the main shaft nut 30, the main shaft 31, the gear 32, the second bearing 33, the clutch component 34, the annular joint 35, the connecting groove 36, the clutch piece 37, the connecting bolt 38, the return spring 39, the mounting seat 41, the limit sleeve 42, the limit part 43, the first bearing 45, the power supply structure a, the power supply joint b, the control member c, the control button d, the control body e, the power clutch structure f, the coupling body g, the sealing plate h, the main shaft component i, the auxiliary shaft component j, the power body 100, the motor package 101, the motor 102, the power output structure 103, the proximity switch 104, the positioning cylinder 105, the assembly step 106, the expansion part 107, the elastic washer 108, the mounting structure 109, the operating handle insert 200, the mounting channel 201, the locking mechanism 300, the button 301, the button 302, The terms of the reversing assembly 303, the first reversing shaft 304, the second reversing shaft 305, the swing arm 306, the sliding block 307, the eccentric 308, the guide ramp 309, the deformation gap 310, etc., do not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A rotary cutter comprises an operating handle (200), a rotary cutting driving device (3) is arranged in the operating handle (200), and the rotary cutter is characterized in that: the rotary cutting driving device (3) is connected with a rotary cutting tool bar (1) positioned outside an operating handle (200) through a main shaft assembly (i), a rotary cutting tool bit (2) is arranged at the outer end of the rotary cutting tool bar (1), a limiting piece (4) is fixed on the operating handle (200), the limiting piece (4) extends to the rotary cutting tool bit (2), a limiting part (43) with an outer end axially exceeding the outer end of the rotary cutting tool bit (2) is arranged on the limiting piece (4), and the limiting part (43) is positioned on one side of the rotary cutting tool bit (2);

a power main body (100) is arranged in the operating handle (200), and the power main body (100) comprises a motor packaging body (101) and a motor (102) positioned in the motor packaging body (101);

still be equipped with locking mechanism (300) on operating handle (200), motor packaging body (101) surface has to motor packaging body (101) inside sunken mounting structure (109), the one end of locking mechanism (300) can imbed or break away from mounting structure (109), locking mechanism (300) are including activity chain button (301) on operating handle (200) and inserts (302) that can imbed or break away from mounting structure (109), be connected through switching-over subassembly (303) between button (301) and inserts (302), during activity button (301), switching-over subassembly (303) drive inserts (302) along the direction removal mutually perpendicular with button (301) direction of activity.

2. A rotational atherectomy device according to claim 1, wherein: the limiting part (4) is a limiting sleeve (42), the inner end of the limiting sleeve (42) is fixedly connected with a secondary shaft assembly (j) fixed in the operating handle (200), the secondary shaft assembly (j) is sleeved on the periphery of the main shaft assembly (i), and a bearing is arranged between the secondary shaft assembly (j) and the main shaft assembly (i).

3. A rotary shaver according to claim 1, wherein: the rotary cutting tool bar (1) is tubular, and the rotary cutting tool head (2) comprises a plurality of rotary cutting tooth blades (21) which are formed at the end part of the rotary cutting tool bar (1) and are arranged annularly.

4. A rotational atherectomy device according to claim 1, wherein: the limiting part (43) is arc-shaped, and the radian of the limiting part (43) is 45-75 degrees.

5. A rotary shaver according to claim 1, wherein: the main shaft assembly (i) comprises a main shaft (31), a gear (32) in driving connection with the power main body (100) is fixedly connected to the main shaft (31), the main shaft (31) is in driving connection with the rotary cutting cutter rod (1), a second bearing (33) is connected to the outside of the main shaft (31), a clutch assembly (34) is further arranged between the main shaft (31) and the rotary cutting cutter rod (1), and the main shaft (31) drives the rotary cutting cutter rod (1) to rotate through the clutch assembly (34).

6. A rotational atherectomy device according to claim 5, wherein: the clutch component (34) comprises an annular joint (35) positioned between the rotary cutting tool bar (1) and the main shaft (31), the annular joint (35) is fixedly connected with the rotary cutter bar (1), the outer surface of the annular joint (35) is provided with a plurality of connecting grooves (36) which are sunken towards the inside of the annular joint (35), the spindle (31) is fixedly connected with the spindle nut (30), the clutch disc (37) is rotatably connected on the spindle nut (30), one end of the clutch plate (37) is fixedly connected with a connecting bolt (38), the other end is connected with a return spring (39), the connecting plug pin (38) penetrates through the main shaft (31) and extends into the connecting groove (36), one end of the return spring (39) is pressed on the main shaft (31) or the main shaft nut (30), and the connecting bolt (38) can move and be separated out of the connecting groove (36) by compressing the return spring (39); the connecting groove (36) is provided with a plurality of connecting grooves which are uniformly distributed along the circumferential direction of the annular joint (35).

7. A rotational atherectomy device according to claim 5, wherein: the motor (102) outputs motor power to the outside of the motor packaging body (101) through a power output structure (103) connected with the motor (102), the power output structure (103) is connected with the motor packaging body (101) in a sealing mode, a power supply structure (a) and a proximity switch (104) controlled to be switched on and switched off by a proximity control piece (c) arranged outside the motor packaging body (101) are further packaged in the motor packaging body (101), and the motor (102), the proximity switch (104) and the power supply structure (a) are electrically connected to form a series loop.

8. A rotational atherectomy device according to claim 7, wherein: the power supply structure (a) comprises a power supply connector (b), the power supply connector (b) is arranged in the motor packaging body (101) in a penetrating mode and is connected with the motor packaging body (101) in a sealing mode, and the power supply connector (b) is directly connected to the series circuit or is connected with the series circuit through a storage battery; or the power supply structure (a) comprises a wireless rechargeable battery packaged in a motor package body (101); the power main body (100) is a cylindrical body, the power output structure (103) is positioned at the upper end of the cylindrical body, and the power supply connector (b) is positioned at the lower end of the cylindrical body; the outer end of the power output structure (103) is provided with a power clutch structure (f); the power main body (100) is further provided with a mounting structure (109) detachably connected to the handheld medical instrument, and the power clutch structure (f) is connected with a working part of the handheld medical instrument after the power main body (100) is mounted on the handheld medical instrument.

9. A rotary shaver according to claim 8, wherein: power take off structure (103) is including shaft coupling body (g), motor packaging body (101) upper end inboard is equipped with shrouding (h), shaft coupling body (g) are tube-shape and circumference and wear to locate shrouding (h) movive seal ground, the power shaft tight fit of motor (102) is inserted in shaft coupling body (g) inner, power separation and reunion structure (f) is including the unsmooth butt joint structure who locates shaft coupling body (g) outer end.

10. A rotational atherectomy device according to claim 7, wherein: motor (102) are fixed in motor packaging body (101) through motor location structure, motor location structure includes that the tight fit ground overlaps in motor (102) outlying location barrel (105), location barrel (105) lower extreme is opened has a plurality of axial extensions's constant head tank (110), motor packaging body (101) inner wall is equipped with a plurality of axial extensions's location sand grip, the location sand grip is inserted in constant head tank (110) one-to-one, motor (102) upper end supports annular step (111) that leans on in motor packaging body (101) inner wall.