CN113143396B

CN113143396B - Ultrasonic bone knife for annular bone harvesting

Info

Publication number: CN113143396B
Application number: CN202110533993.9A
Authority: CN
Inventors: 朱黎黎; 李特; 冯维华; 何海涛
Original assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Current assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2023-08-18
Anticipated expiration: 2041-05-17
Also published as: CN113143396A

Abstract

The invention provides an ultrasonic bone knife for annular bone extraction, which comprises a handle; the left end of the handle is provided with a protective cover, and the protective cover is connected with the handle through a spigot structure; the touch-proof device is arranged on the outer side of the handle; the rotating device is arranged in the handle, the adjusting devices are arranged on the left side and the right side of the rotating device, and the two groups of adjusting devices are opposite in installation direction; the connecting device is arranged in the handle, and the fixing device is arranged outside the connecting device; the cutting device is arranged inside the fixing device; the limiting device is arranged on the front side and the rear side of the inside of the handle, so that the limiting device is more stable in use, the success rate of operation is increased, the protective cover prevents the cutter head from being damaged, the service life of the cutter head is prolonged, and the cutter head is prevented from being exposed to the outside for a long time when not in use and is easy to be infected by bacteria, so that the use safety of the invention is improved.

Description

Ultrasonic bone knife for annular bone harvesting

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to an ultrasonic bone knife for annular bone extraction.

Background

The ultrasonic bone knife is an innovative technology and has the characteristics and advantages which are incomparable with the traditional manual and electric orthopedic surgical instruments, the knife utilizes the high-intensity focused ultrasonic technology, electric energy is converted into mechanical energy through a transducer, and the water in the contacted tissue cells is vaporized through high-frequency ultrasonic oscillation, so that protein hydrogen bonds are broken, and bone tissues needing to be cut in the operation are thoroughly destroyed.

The application number is as follows: in the patent of CN201110195962.3, an ultrasonic bone knife head is disclosed, which comprises a blade and a knife tip, wherein an included angle is formed between the longitudinal central axis of the blade and the longitudinal central axis of the knife tip, the front end of the knife tip is provided with a knife edge, and the center of the knife edge is positioned on the longitudinal central axis of the knife tip.

Based on the above, the inventor finds that, at present, when the ultrasonic osteotome is used, the doctor is inconvenient to quickly and accurately adjust the angle of the tool bit, so that the doctor is inconvenient to use at different positions, on one hand, the labor intensity and the operation difficulty of the doctor are increased, on the other hand, the operation time is increased, and then the operation risk is increased, and the ultrasonic osteotome at present lacks a protection structure, so that the device is easy to damage the tool bit when falling down, and the tool bit is easy to be infected by bacteria when being exposed outside for a long time, the use safety of the device is reduced, and secondly, the present ultrasonic osteotome is long in waste time when changing the tool bit, the pain of a patient is increased, and the annular bone taking is inconvenient, so that the existing ultrasonic osteotome meets the use requirement of the current generation.

Disclosure of Invention

In order to solve the technical problems, the invention provides an ultrasonic bone knife for annular bone taking, which solves the problems that the angle of a knife head is inconvenient to adjust, a doctor is inconvenient to use at different positions, the knife head is easy to damage, the knife head is easy to be infected by bacteria, the time is wasted when the knife head is replaced, and the annular bone taking is inconvenient.

The invention discloses an ultrasonic bone knife for annular bone extraction, which is characterized by comprising the following specific technical means:

an ultrasonic osteotome for annular bone harvesting comprises a handle;

the left end of the handle is provided with a protective cover, the protective cover is connected with the handle through a spigot structure, and the interior of the protective cover is of a hollow structure;

the touch-proof device is arranged on the outer side of the handle;

the rotating device is arranged in the handle, the left side and the right side of the rotating device are provided with adjusting devices, and the installation directions of the two groups of adjusting devices are opposite;

the connecting device is arranged in the handle, and the fixing device is arranged outside the connecting device;

the cutting device is arranged inside the fixing device;

the limiting devices are provided with twelve groups in total, the twelve groups of limiting devices are arranged on the front side and the rear side of the inside of the handle, and the twelve groups of limiting devices are distributed in an annular equidistant mode.

Further, the adjusting device includes:

the trigger device is arranged in the handle;

the driving device is arranged at the inner end of the triggering device;

and the elastic piece is arranged between the driving device and the handle.

Further, the fixing device includes:

the fixed block is fixedly connected with the second connecting shaft, the right end of the fixed block is of a hemispherical structure, and two guide grooves are formed in the fixed block;

the two moving blocks are arranged in total and are connected in the fixed block in a sliding way;

the two tension springs are arranged in total, and the two tension springs are arranged between the two moving blocks and the fixed block.

Further, the driving device includes:

the driving rod is fixedly connected with the limit post;

the two connecting pieces are arranged in total and are rotatably arranged in the driving rod;

the driving block is arranged in the driving rod, the outer side of the driving block is flush with the outer side of the driving rod, the driving block is rotationally connected with the two connecting pieces, and the driving block is meshed with the first gear;

the elastic piece is fixedly arranged at the bottom of the driving block through a screw, and the elastic piece is tightly attached to the driving rod.

Further, the touch preventing device includes:

the hollow tube is rotationally connected with the handle;

the balls are six in number, the six balls are arranged in the hollow tube, and springs are arranged on the inner sides of the six balls;

the through holes are arranged in total, and the two through holes are arranged on the hollow tube in a penetrating way.

Further, the cutting device includes:

the connecting rod is connected with the fixed block in a sliding way;

the cutter head is fixedly arranged on the left side of the connecting rod and is of an arc-shaped structure;

the two sliding blocks are arranged in total and are connected in the connecting rod in a sliding way;

the first springs are arranged in total, and the first springs are arranged between the two sliding blocks and the connecting rod.

Further, the connecting device includes:

the second connecting shaft is rotationally connected with the handle;

the gears III are provided with two in total, the two gears III are fixedly connected with the connecting shaft II, and the two gears III are meshed with the two gears II.

Further, the rotating device includes:

the first connecting shaft is rotationally connected with the handle;

the first gear is fixedly arranged at the center of the first connecting shaft;

the second gears are arranged in the two gears, the two gears are fixedly connected with the first connecting shaft, the two gears are positioned on the front side and the rear side of the first gear, and thirty fixing holes are formed in the outer side of the second gears in an annular mode.

Further, the limiting device includes:

the mounting seat is fixedly connected with the handle through a screw;

the limiting block is slidably arranged in the mounting seat, and the outer end of the limiting block is of a hemispherical structure;

and the second spring is arranged between the limiting block and the handle.

Further, the triggering device includes:

the limiting column is connected with the handle in a sliding manner;

the trigger head is arranged at the outer end of the limit column, is of a cylindrical structure and is arranged concentrically with the through hole.

The invention at least comprises the following beneficial effects:

1. the hollow tube is arranged, so that the invention avoids the situation that two trigger heads are touched by mistake when the hollow tube is used, ensures the normal use of the hollow tube, improves the operation precision, ensures that the hollow tube is fixedly connected with the handle after rotating, is convenient for doctors to use, ensures that the hollow tube is more stable when in use, increases the success rate of operation, protects the shield, avoids the damage of the cutter head on one hand, prolongs the service life of the cutter head, and avoids the cutter head to be exposed outside for a long time when not in use and to be easily infected by bacteria on the other hand, thereby improving the use safety of the hollow tube.

2. According to the invention, the two sliding blocks are arranged, so that the connection between the connecting rod and the fixed block is firmer, the shaking of the invention during use is avoided, the use stability of the invention is improved, the two sliding blocks are arranged, when a doctor presses the two sliding blocks, the two sliding blocks move downwards, so that the doctor can conveniently install and take down the cutter head, the cutter changing speed is improved, the operation time is reduced, the pain of a patient is reduced, the cutter head is of an arc-shaped structure, the annular bone taking use is convenient, the cutting position is smoother, and the later recovery of the patient is facilitated.

3. The driving device is convenient to adjust the angle of the cutting device, the driving block is rotationally connected with the driving rod through the connecting piece, when a doctor presses the trigger head, the driving block drives the gear I to rotate, and the elastic piece is arranged between the driving rod and the handle, so that the trigger head moves outwards after being pressed, the doctor can conveniently adjust for a plurality of times, and the twelve groups of limiting devices are arranged in the handle, so that the driving block moves inwards when the driving device moves outwards, unidirectional angle adjustment is realized, the driving device is convenient for the doctor to use when cutting different parts, great convenience is provided for the doctor, and further the success rate of the operation is improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the structure of the protective cover of the present invention after being opened.

FIG. 3 is a schematic view of the handle and touch screen assembly of the present invention partially in section.

Fig. 4 is a schematic structural view of the internal components of the present invention.

Fig. 5 is a schematic view of a partial enlarged structure of the area a in fig. 4 according to the present invention.

Fig. 6 is a schematic view of the fixing device and the cutting device of the present invention partially cut away.

Fig. 7 is a partially enlarged schematic view of the area B of fig. 6 according to the present invention.

Fig. 8 is a partially enlarged schematic view of the structure of the present invention in the region C of fig. 5.

Fig. 9 is a schematic view of the adjusting device of the present invention in a central cut-away configuration.

Fig. 10 is a schematic view of the adjusting device of the present invention partially cut away.

Fig. 11 is a schematic view of the structure of the turning device and the connecting device of the present invention.

Fig. 12 is a schematic structural view of another embodiment of the present invention.

In the figure, the correspondence between the component names and the drawing numbers is:

1. a handle;

2. a touch prevention device; 201. a hollow tube; 202. a ball; 203. a through hole;

3. a protective cover;

4. a rotating device; 401. a first connecting shaft; 402. a first gear; 403. a second gear; 4031. a fixing hole;

5. an adjusting device; 501. a triggering device; 5011. a limit column; 5012. a trigger head; 502. a driving device; 5021. a driving rod; 5022. a connecting piece; 5023. a driving block; 5024. an elastic sheet; 503. an elastic member;

6. a connecting device; 601. a second connecting shaft; 602. a third gear;

7. a fixing device; 701. a fixed block; 702. a moving block; 703. a tension spring;

8. a cutting device; 801. a connecting rod; 802. a cutter head; 803. a sliding block; 804. a first spring;

9. a limiting device; 901. a mounting base; 902. a limiting block; 903. and a second spring.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.

In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Examples:

as shown in fig. 1 to 12:

the invention provides an ultrasonic bone knife for annular bone extraction, which comprises a handle 1;

the left end of the handle 1 is provided with a protective cover 3, the protective cover 3 is connected with the handle 1 through a spigot structure, and the interior of the protective cover 3 is of a hollow structure;

the touch-proof device 2 is arranged on the outer side of the handle 1;

the rotating device 4 is arranged in the handle 1, the adjusting devices 5 are arranged on the left side and the right side of the rotating device 4, and the installation directions of the two groups of adjusting devices 5 are opposite;

the connecting device 6 is arranged in the handle 1, and a fixing device 7 is arranged outside the connecting device 6;

a cutting device 8, the cutting device 8 being mounted inside the fixing device 7;

the limiting devices 9 are arranged in twelve groups, the twelve groups of limiting devices 9 are arranged on the front side and the rear side of the inside of the handle 1, and the twelve groups of limiting devices 9 are distributed in an annular equidistant mode.

As shown in fig. 3, the touch-proof device 2 includes:

a hollow tube 201, the hollow tube 201 is rotationally connected with the handle 1;

the balls 202, the balls 202 are six in total, the six balls 202 are installed inside the hollow tube 201, and springs are installed inside the six balls 202;

the two through holes 203 are arranged in total, the two through holes 203 are arranged on the hollow tube 201 in a penetrating way, and the hollow tube 201 is arranged, so that the problem that two trigger heads 5012 are touched by mistake in use is avoided, the normal use of the invention is ensured, the operation precision is improved, and the six balls 202 are arranged, so that the hollow tube 201 is fixedly connected with the handle 1 after rotation, and the use of doctors is facilitated.

As shown in fig. 9, the adjusting device 5 includes:

the trigger device 501, the trigger device 501 is installed inside the handle 1;

a driving device 502, wherein the driving device 502 is arranged at the inner end of the triggering device 501;

an elastic member 503, the elastic member 503 is installed between the driving device 502 and the handle 1, and the triggering device 501 includes:

the limit post 5011, the limit post 5011 is connected with the handle 1 in a sliding way;

trigger head 5012, trigger head 5012 installs the outer end at spacing post 5011, and trigger head 5012 is cylindrical structure to trigger head 5012 and the concentric setting of through-hole 203, drive arrangement 502 includes:

the driving rod 5021, wherein the driving rod 5021 is fixedly connected with the limit column 5011;

the two connecting pieces 5022 are arranged in total, and the two connecting pieces 5022 are rotatably arranged in the driving rod 5021;

the driving block 5023, the driving block 5023 is arranged inside the driving rod 5021, the outer side of the driving block 5023 is flush with the outer side of the driving rod 5021, the driving block 5023 is rotationally connected with the two connecting pieces 5022, and the driving block 5023 is meshed with the first gear 402;

the elastic piece 5024, the elastic piece 5024 passes through screw fixed mounting in the bottom of drive piece 5023, and closely laminate between elastic piece 5024 and the actuating lever 5021, the setting of drive arrangement 502, be convenient for adjust cutting device 8's angle, because of actuating lever 5021 is inside to be connected with the drive piece 5023 through connecting piece 5022 rotation, drive piece 5023 drives first 402 rotation of gear when doctor presses trigger head 5012, and install elastic component 503 between actuating lever 5021 and the handle 1, make trigger head 5012 press the back outwards remove, be convenient for the doctor and adjust many times, again because of handle 1 internally mounted has twelve sets of stop device 9, drive piece 5023 inwards remove when making drive arrangement 502 outwards remove, unidirectional angular adjustment has been realized, great facility has been provided for the doctor, and then the success rate of operation has been improved.

As shown in fig. 11, the turning device 4 includes:

the first connecting shaft 401 is rotationally connected with the handle 1;

a first gear 402, the first gear 402 being fixedly installed at the center of the first connecting shaft 401;

the second gears 403, the second gears 403 are provided with two, and the second gears 403 are fixedly connected with the first connecting shaft 401, and the second gears 403 are located at the front and rear sides of the first gears 402, and the outer sides of the second gears 403 are provided with thirty fixing holes 4031 in a ring shape, and the connecting device 6 comprises:

the second connecting shaft 601 is rotationally connected with the handle 1;

the third gear 602, the third gear 602 is equipped with two altogether, and two third gears 602 and connecting axle two 601 fixed connection to two third gears 602 and two second gears 403 meshing are connected, and stop device 9 includes:

the mounting seat 901 is fixedly connected with the handle 1 through a screw;

the limiting block 902, the limiting block 902 is slidably arranged in the mounting seat 901, and the outer end of the limiting block 902 is of a hemispherical structure;

the second spring 903 is arranged between the limiting block 902 and the handle 1, and the twelve groups of limiting devices 9 are arranged, so that the invention is more stable in use, the operation precision is improved, and the success rate of the operation is increased.

As shown in fig. 7, the fixing device 7 includes:

the fixed block 701, the fixed block 701 is fixedly connected with the second connecting shaft 601, the right end of the fixed block 701 is of a hemispherical structure, and two guide grooves are formed in the fixed block 701;

the moving blocks 702, the moving blocks 702 are provided with two in total, and the two moving blocks 702 are connected inside the fixed block 701 in a sliding way;

tension springs 703, tension springs 703 are provided two altogether, and two tension springs 703 are installed between two movable blocks 702 and fixed block 701, and cutting device 8 includes:

a tie bar 801, the tie bar 801 being slidably connected to the fixing block 701;

the tool bit 802, the tool bit 802 is fixedly arranged on the left side of the connecting rod 801, and the tool bit 802 is of an arc-shaped structure;

the two sliding blocks 803 are arranged in total, and the two sliding blocks 803 are connected inside the connecting rod 801 in a sliding way;

the first springs 804 are arranged in total, the first springs 804 are arranged between the two sliding blocks 803 and the connecting rod 801, the two sliding blocks 803 are arranged, so that the connecting rod 801 and the fixed block 701 are more firmly connected, the shaking of the device is avoided when the device is used, the use stability of the device is improved, the two moving blocks 702 are arranged, when a doctor presses the two moving blocks 702, the two sliding blocks 803 move downwards, so that the doctor can conveniently install and remove the cutter head 802, the cutter changing speed is improved, the operation time is reduced, the pain of a patient is reduced, the cutter head 802 is of an arc-shaped structure, the annular bone taking is convenient, the cutting part is smoother, and the later recovery of the patient is facilitated.

In another embodiment, referring to fig. 12, a soft pad can be fixedly installed on the outer side of the hollow tube 201, anti-slip patterns are arranged on the outer side of the soft pad, and two round holes with the same size as the through holes 203 are formed in the soft pad in a penetrating manner, so that the friction force between the device and the hands of a doctor is increased, slipping of the doctor during use is avoided, and the operation precision is improved.

Specific use and action of the embodiment:

when the cutter head is used, firstly, a doctor opens the protective cover 3, on one hand, the protective cover 3 avoids the damage of the cutter head 802, the service life of the cutter head 802 is prolonged, on the other hand, the cutter head 802 is prevented from being exposed to the outside for a long time when not in use and is easy to be infected by bacteria, the use safety of the cutter is improved, then, the doctor adjusts the angle of the cutting device 8 by pressing the two trigger heads 5012 according to the cutting requirement, the driving rod 5021 is connected with the driving block 5023 through the connecting piece 5022 in a rotating way, when the doctor presses the trigger heads 5012, the driving block 5023 drives the gear I402 to rotate, and the elastic piece 503 is arranged between the driving rod 5021 and the handle 1, so that the trigger heads 5012 are outwards moved after being pressed, the doctor can conveniently adjust for a plurality of times, and because twelve groups of limiting devices 9 are arranged in the handle 1, the driving block 5023 is inwards moved when the driving device 502 is outwards, the unidirectional angle adjustment is realized, the two trigger heads 5012 are positioned in the hollow tube 201, the doctor is prevented from touching the two trigger heads 5012 when in use, the cutter heads are guaranteed to be in use, the error time is reduced, the doctor is guaranteed to press the cutter head is required to be replaced by the doctor, and the doctor is convenient to replace the cutter head 702, and the doctor is convenient to replace the cutter head is required to be replaced by the doctor, and the doctor is convenient to move the cutter 702, and the doctor is convenient to replace when the cutter is needed to move, and the doctor is needed to move, and the cutter is needed to move when the cutter is needed to be replaced.

The present invention is not described in detail in the present application, and is well known to those skilled in the art.

The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. An ultrasonic osteotome for annular bone harvesting, which is characterized in that: comprises a handle (1);

the left end of the handle (1) is provided with a protective cover (3), the protective cover (3) is connected with the handle (1) through a spigot structure, and the interior of the protective cover (3) is of a hollow structure;

the touch-proof device (2) is arranged on the outer side of the handle (1);

the rotating device (4) is arranged in the handle (1), the adjusting devices (5) are arranged on the left side and the right side of the rotating device (4), and the installation directions of the two groups of adjusting devices (5) are opposite;

the connecting device (6), the connecting device (6) is arranged in the handle (1), and the fixing device (7) is arranged outside the connecting device (6);

-a cutting device (8), said cutting device (8) being mounted inside the fixing device (7);

the limiting devices (9) are arranged in twelve groups, the twelve groups of limiting devices (9) are arranged on the front side and the rear side of the inside of the handle (1), and the twelve groups of limiting devices (9) are distributed in an annular equidistant mode;

the rotating device (4) comprises:

the first connecting shaft (401), the first connecting shaft (401) is rotatably connected with the handle (1);

a first gear (402), wherein the first gear (402) is fixedly arranged at the center of the first connecting shaft (401);

the two gears (403) are arranged in total, the two gears (403) are fixedly connected with the first connecting shaft (401), the two gears (403) are positioned on the front side and the rear side of the first gear (402), and thirty fixing holes (4031) are formed in the outer side of the two gears (403) in a ring shape;

the adjusting device (5) comprises:

the trigger device (501), the trigger device (501) is installed in the interior of the handle (1);

a driving device (502), wherein the driving device (502) is arranged at the inner end of the triggering device (501);

an elastic member (503), the elastic member (503) is installed between the driving device (502) and the handle (1);

the triggering device (501) comprises:

the limiting column (5011), the limiting column (5011) is connected with the handle (1) in a sliding way;

the trigger head (5012) is arranged at the outer end of the limit column (5011), the trigger head (5012) is of a cylindrical structure, and the trigger head (5012) and the through hole (203) are concentrically arranged;

the driving device (502) includes:

the driving rod (5021), the driving rod (5021) is fixedly connected with the limit column (5011);

the two connecting pieces (5022) are arranged in the connecting pieces (5022), and the two connecting pieces (5022) are rotatably arranged in the driving rod (5021);

the driving block (5023), the driving block (5023) is installed inside the driving rod (5021), the outer side of the driving block (5023) is flush with the outer side of the driving rod (5021), the driving block (5023) is rotationally connected with the two connecting pieces (5022), and the driving block (5023) is meshed and connected with the first gear (402);

the elastic piece (5024), the elastic piece (5024) passes through the bottom of screw fixed mounting at drive piece (5023), and closely laminating between elastic piece (5024) and the actuating lever (5021).

2. The ultrasonic osteotome for annular bone harvesting of claim 1, wherein: the touch-proof device (2) comprises:

the hollow tube (201), the hollow tube (201) is connected with the handle (1) in a rotating way;

the balls (202) are arranged in total, the balls (202) are arranged in six, the six balls (202) are arranged in the hollow tube (201), and springs are arranged on the inner sides of the six balls (202);

the two through holes (203) are arranged in total, and the two through holes (203) are arranged on the hollow tube (201) in a penetrating way.

3. The ultrasonic osteotome for annular bone harvesting of claim 1, wherein: the connection device (6) comprises:

the second connecting shaft (601), the second connecting shaft (601) is rotationally connected with the handle (1);

the three gears (602) are arranged in total, the two three gears (602) are fixedly connected with the second connecting shaft (601), and the two three gears (602) are in meshed connection with the two second gears (403).

4. The ultrasonic osteotome for annular bone harvesting of claim 1, wherein: the fixing device (7) comprises:

the fixed block (701), the fixed block (701) is fixedly connected with the second connecting shaft (601), the right end of the fixed block (701) is of a hemispherical structure, and two guide grooves are formed in the fixed block (701);

the two moving blocks (702) are arranged in the moving block (702), and the two moving blocks (702) are connected inside the fixed block (701) in a sliding way;

the two tension springs (703) are arranged in total, and the two tension springs (703) are arranged between the two moving blocks (702) and the fixed block (701).

5. The ultrasonic osteotome for annular bone harvesting of claim 1, wherein: the cutting device (8) comprises:

the connecting rod (801), the connecting rod (801) is connected with the fixed block (701) in a sliding way;

the tool bit (802), the tool bit (802) is fixedly arranged on the left side of the connecting rod (801), and the tool bit (802) is of an arc-shaped structure;

the two sliding blocks (803) are arranged in total, and the two sliding blocks (803) are connected inside the connecting rod (801) in a sliding way;

the springs I (804) are arranged in total, and the springs I (804) are arranged between the two sliding blocks (803) and the connecting rod (801).

6. The ultrasonic osteotome for annular bone harvesting of claim 1, wherein: the limiting device (9) comprises:

the mounting seat (901), the mounting seat (901) is fixedly connected with the handle (1) through a screw;

the limiting block (902), the limiting block (902) is slidably arranged in the mounting seat (901), and the outer end of the limiting block (902) is of a hemispherical structure;

the second spring (903), the second spring (903) is installed between stopper (902) and handle (1).