CN217285974U - Rotary cutter - Google Patents

Abstract

The utility model belongs to the technical field of medical instrument, especially, relate to a rotary cutter. The utility model discloses, to the problem that can't realize among the prior art that tumour full isolation excision operation is high-efficient, conveniently go on, provide a rotary cutter, including operating handle, be equipped with rotary-cut drive arrangement in operating handle, rotary-cut drive arrangement passes through main shaft assembly and links to each other with the rotary-cut cutter arbor that is located outside operating handle, is equipped with the rotary-cut tool bit in rotary-cut cutter arbor outer end, the last spacing piece that is fixed with of operating handle, the spacing piece extends to rotary-cut tool bit department and has the outer end axial on the spacing piece and surpasss the spacing portion outside the rotary-cut tool bit outer end, and spacing position is in rotary-cut tool bit one side. The utility model discloses be equipped with the locating part that is used for restricting tumour position to the side of rotary-cut tool bit, it is fixed to need not the side to stretch into the clamping jaw when the cutting like this, utilizes rotary-cut tool bit side cutting to compare in the formula of punching cutting method simultaneously, has higher cutting efficiency.

Description

Rotary cutter

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate 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 excision.

For example, the chinese utility model patent discloses a uterine 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.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above problem, provide a rotary cutter that the excision operation was carried out is kept apart to tumour entirely conveniently.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the utility model provides a rotary cutter, includes operating handle, is equipped with rotary-cut drive arrangement in operating handle, rotary-cut drive arrangement passes through main shaft assembly and links to each other with the rotary-cut cutter arbor that is located outside operating handle, is equipped with the rotary-cut cutter head in rotary-cut cutter arbor outer end, operating handle is last to be fixed with a spacing piece, the locating part extends to rotary-cut cutter head department and has the spacing portion that the outer end axial surpassed outside the rotary-cut cutter head outer end on the locating part, and spacing portion is located rotary-cut cutter head one side, the width of spacing portion is reduced to the one end of keeping away from spacing sheathed tube by the one end that is close to spacing sheathed tube gradually.

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 grooves 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 grooves, 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 grooves 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 the 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 to be turned on and off by a proximity control element externally disposed outside the motor package 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 circuit.

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 comprises a positioning cylinder sleeved on the periphery of the motor in a tight fit manner, a plurality of axially extending positioning grooves are formed in the lower end of the positioning cylinder, a plurality of axially extending positioning convex strips are arranged on the inner wall of the motor package, the positioning convex strips 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 utility model has the advantages of:

1. the utility model discloses be equipped with the locating part that is used for restricting tumour position to the side of rotary-cut tool bit, it is fixed to need not the side to stretch into the clamping jaw when the cutting like this, utilizes the cutting of rotary-cut tool bit side to compare in punching formula cutting method simultaneously, has higher cutting efficiency.

2. The utility model discloses a locating part size has compromise the efficiency to the spacing reliability of tumour and the cutting of rotary-cut tool bit in suitable within range.

3. The utility model discloses a power main part utilizes opening and close of proximity switch control motor, need not to set up mechanical button on the motor packaging body like this for the motor packaging body wholly has better seal, can carry out high temperature high pressure steam sterilization.

4. The utility model discloses be equipped with the switching-over subassembly that can change relative motion direction between button and the inserts for the button sets up the position and has bigger selection space, and switching-over subassembly simple structure is small and exquisite simultaneously, and the transmission is stable.

Drawings

FIG. 1 is a schematic 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 part of the structure of the present invention;

FIG. 4 is a 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 the 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 present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

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.

The utility model discloses, during the use, thereby power main part 100 drive rotary-cut drive arrangement 3 drives rotary-cut cutter arbor 1 and rotates, rotary-cut tool bit 2 rotates with rotary-cut cutter arbor 1 is synchronous, and locating part 4 carries out spacing location to the tumour for the tumour can not take place synchronous equidirectional rotation under rotary-cut tool bit 2's drive, and 2 side cutting tumours of rotary-cut tool bit, the tumour is surrounded the process of peeling like the apple and is cut progressively and diminish, can be taken out until through working channel. The event the utility model discloses be equipped with locating part 4 that is used for restricting tumour position in 2 sides of rotary-cut tool bit, it is fixed to need not the side to stretch into the clamping jaw when the cutting like this, utilizes 2 side cuts of rotary-cut tool bit to compare in the formula of punching cutting method simultaneously, has higher cutting efficiency.

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 utility model discloses a locating part 4 size has compromise the efficiency to the spacing reliability of tumour and the cutting of rotary-cut tool bit 2 in suitable scope.

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, so as to drive the rotary cutting tool 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, at which time the spindle 31 and the rotary cutter bar 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 circumference 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 reset 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 loop, 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 loop or is connected with the series loop through a storage battery; or the power supply structure a comprises a wireless rechargeable battery packaged in the motor package 101.

The utility model discloses, during the use, press the control button d of installing on hand-held type medical instrument, the control body e of control button d tip is close and triggers proximity switch 104 and makes proximity switch 104 starter motor 102, and motor 102 passes through power take off structure 103 output drive power, and the rotary cutter on the drive hand-held type medical instrument carries out the rotary-cut. So the utility model discloses utilize opening and close of proximity switch 104 control motor 102, need not to set up mechanical button on motor packaging body 101 like this for motor packaging body 101 is whole to have better seal, can carry out high temperature high pressure steam sterilization.

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 which is 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 through 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 has 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 grip, the location sand grip is inserted in constant head tank 110 one-to-one, motor 102 upper end supports and leans on annular step 111 in motor packaging body 101 inner wall. The positioning slot 110 and the positioning protrusion strip are matched 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 portion 107, and an assembly step 106 is formed between the upper end of the enlarged portion 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 utility model discloses be equipped with the switching-over subassembly 303 that can change relative motion direction between button 301 and the inserts 302 for button 301 sets up the position and has bigger selection space, and switching-over subassembly 303 simple structure is small and exquisite simultaneously, and the transmission is stable.

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 far away from the swing arm 306, extends into the button 301, an end of the second reversing shaft 305, which is far 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 can be 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 302 extends to below the sliding block 307, and a deformation gap 310 is formed between the insert and the sliding block 307, and the insert 302 is made of a deformable plastic material. 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 utility model discloses a theory of operation is: 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 bulge 107 is pressed on the operating handle 200, the start button mounted on the operating handle 200 is pressed, the proximity switch 104 is triggered to start the motor 102 by the proximity switch 104, the motor 102 drives the gear 32 through the power output structure 103, the gear 32 drives the main shaft 31 to synchronously rotate, the main shaft 31 drives the rotary-cut cutter rod 1 to rotate through the clutch assembly 34, the limiting part 43 on the limiting assembly 4 limits and positions the tumor at the moment, so that the tumor cannot synchronously rotate in the same direction under the driving of the rotary-cut cutter head 2, the tumor is cut on the side surface of the rotary-cut cutter head 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. 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. The event the utility model discloses be equipped with spacing subassembly 4 that is used for restricting the tumour position in rotary-cut tool bit 2 sides, it is fixed to need not the side to stretch into the clamping jaw like this when the cutting, utilizes the cutting of rotary-cut tool bit 2 sides to compare in the formula of punching cutting method simultaneously, has higher cutting efficiency.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying 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 commutation assembly 303, first commutation shaft 304, second commutation shaft 305, swing arm 306, slide block 307, eccentric 308, guide ramp 309, deformation gap 310, etc., but 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 in a manner that is inconsistent with the spirit of the invention.

Claims (9)

1. A rotary cutter comprising an operating handle (200), a rotary cutting driving device (3) being provided in the operating handle (200), 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); the width of the limiting part (43) is gradually reduced from one end close to the limiting sleeve (42) to one end far away from the limiting sleeve (42); the limiting part (4) is a limiting sleeve (42), the inner end of the limiting sleeve (42) is fixedly connected with an auxiliary shaft assembly (j) fixed in the operating handle (200), the auxiliary shaft assembly (j) is sleeved on the periphery of the main shaft assembly (i), and a bearing is arranged between the auxiliary shaft assembly (j) and the main shaft assembly (i).

2. A rotational atherectomy device 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.

3. 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.

4. A rotational atherectomy device according to claim 1, wherein: the power main body (100) is arranged in the operating handle (200), 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 onto the main shaft (31), the main shaft (31) is in driving connection with the rotary cutting tool bar (1), a second bearing (33) is connected outside the main shaft (31), a clutch assembly (34) is further arranged between the main shaft (31) and the rotary cutting tool bar (1), and the main shaft (31) drives the rotary cutting tool bar (1) to rotate through the clutch assembly (34).

5. A rotary shaver according to claim 4, wherein: the clutch component (34) comprises an annular joint (35) positioned between the rotary cutting cutter rod (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 grooves (36) are provided with a plurality of connecting grooves which are evenly distributed along the circumferential direction of the annular joint (35).

6. A rotational atherectomy device according to claim 4, wherein: the power main body (100) comprises a motor packaging body (101) and a motor (102) located in the motor packaging body (101), the motor (102) outputs motor power to 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.

7. A rotary shaver according to claim 6, 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 joint (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.

8. A rotational atherectomy device according to claim 7, 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.

9. A rotary shaver according to claim 6, 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 is supported and is leaned on annular step (111) in motor packaging body (101) inner wall.

Images