Minimally invasive bone taking equipment

Abstract

The invention discloses minimally invasive bone taking equipment, and relates to the technical field of medical instruments, the minimally invasive bone taking equipment comprises a cutting tool, the cutting tool comprises a tubular tool body, the cutting end of the tool body is provided with a cutting edge, the cutting edge comprises a first cutting edge and a second cutting edge, the first cutting edge is zigzag, and the second cutting edge is zigzag; the orientation of the first cutting edge is parallel to the axial direction of the cutter body; the other end of the cutter body is a second end, and the second cutting edge inclines towards the inner side of the cutter body; the second end of the rotary collecting bin is connected with one end of the rotary collecting bin, and bone tissue obtained through cutting of the cutting tool can move into the rotary collecting bin through the interior of the tool body; and the power part is used for driving the rotary collecting bin and the cutting tool to rotate around the axis of the tool body. The strip-shaped bone blocks are obtained through the design of the second cutting edge on the cutting tool, the power component drives the cutting tool and the rotary collecting bin to rotate, and the purpose of obtaining the complete strip-shaped bone blocks in the minimally invasive autogenous bone transplantation surgery is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a minimally invasive bone harvesting device. Background Art

[0002] Autologous bone transplantation refers to obtaining bone tissue from the patient's own appropriate bone extraction site and then transplanting it to the patient's bone defect site. Autologous bone is considered the "gold standard" in bone transplantation. Compared with allogeneic bone and artificial bone, it has a lower risk of immune rejection and better biocompatibility. It has strong bone growth induction and osteogenesis properties and has always been the first choice for orthopedic surgeries such as bone nonunion, bone defects, bone tumors, spinal and joint fusion.

[0003] Reducing complications at the donor site is the focus of clinical attention in autologous bone transplantation at this stage. In traditional open autologous bone transplantation surgery, in order to obtain autologous bone transplant materials, the bone surface needs to be completely exposed, which leads to a high incidence of complications at the donor site. The invention patent CN108618825A proposes a minimally invasive bone tissue surgical device, which uses a drive control system to drive a small diameter sleeve and a cutter head to cut (or grind) bone tissue, and quickly and directionally transmits granular or muddy bone tissue to a rotating collection bin through a spiral conveying part connected to the cutter head, thereby realizing the function of collecting autologous bone. Compared with traditional open surgery, the device can achieve minimally invasive bone extraction and reduce complications at the donor site. However, due to its structural design, the device cannot achieve the acquisition of strip bone blocks in a minimally invasive environment. Minimally invasive autologous bone transplantation surgery is an effective method to reduce complications at the donor site, but how to obtain strip bone blocks in minimally invasive autologous bone transplantation surgery is an urgent problem to be solved in current clinical practice. Summary of the invention

[0004] The purpose of the present invention is to provide a minimally invasive bone harvesting device to solve the problems existing in the above-mentioned prior art and to achieve the acquisition of strip-shaped bone blocks in minimally invasive autologous bone transplantation surgery.

[0005] To achieve the above object, the present invention provides the following solutions: The present invention provides a minimally invasive bone removal device, comprising: A cutting tool, the cutting tool comprising a tubular tool body, a cutting end of the tool body being provided with a cutting edge, the cutting edge comprising a first cutting edge and a second cutting edge, the first cutting edge being serrated, and the first cutting edge being oriented parallel to the axial direction of the tool body; the other end of the tool body being the second end, the second cutting edge being inclined toward the inner side of the tool body, the second cutting edge being located within the axial projection range of the tool body, the first cutting edge being used for cutting bone tissue, the second cutting edge being used for separating bone tissue, and the first cutting edge and the second cutting edge being used in combination to obtain bone tissue; A rotating collection bin, wherein the second end is connected to one end of the rotating collection bin, and the bone tissue obtained by cutting the cutting tool can be moved into the rotating collection bin through the interior of the tool body, and the rotating collection bin is used to accommodate the bone tissue; A power component is used to drive the rotating collection bin and the cutting tool to rotate around the axis of the tool body, and through the rotation of the second cutting edge, a transmission force is generated on the bone tissue in the tool body to move toward the second end of the tool body, so that the bone tissue in the tool body moves from the tool body to the rotating collection bin.

[0006] Preferably, the power component comprises a housing, a drive motor and a control switch, the housing is a gun-type housing, the drive motor is fixedly arranged in the housing, a motor fixing frame is arranged in the housing, and the drive motor is fixedly connected to the motor fixing frame, the control switch is arranged on the outer wall of the housing, and the control switch is used to control the opening and closing and output power of the drive motor; The other end of the rotating collection bin is detachably connected to one end of the connecting piece, and the other end of the connecting piece is connected to the motor fixing frame via a thrust bearing. The connecting piece is arranged in the outer shell, and the connecting piece is rotatably matched with the outer shell via a plane ball bearing, and the plane ball bearing is closer to the cutting tool than the thrust bearing, and the output shaft of the driving motor is transmission-connected to the connecting piece.

[0007] Preferably, the rotating collection bin is reversely threadedly connected to the connecting piece.

[0008] Preferably, the cross section of the connection between the second cutting edge and the tool body is taken as a reference plane, the angle between the second cutting edge and the reference plane is A, and 0°≤A<90°.

[0009] Preferably, the number of the second cutting edges is several; when the number of the second cutting edges is at least two, all of the second cutting edges are distributed along the circumference of the tool body, and there is a gap between any two adjacent second cutting edges; the proportion of the circumference of the cutting end occupied by all of the second cutting edges in the circumference of the tool body is 5%-85%.

[0010] Preferably, a pressure sensor is sandwiched between the thrust bearing and the connecting member, an alarm module is provided on the housing, a controller is fixedly provided in the housing, and the pressure sensor and the alarm module are electrically connected to the controller respectively.

[0011] Preferably, the tube diameters of various parts of the tool body are consistent.

[0012] Preferably, the tool body is a tapered tube, and the diameter of the tool body gradually increases from the cutting end to the other end of the tool body; the taper of the tool body is 0°~45°.

[0013] Preferably, the length of the tool body is 20 mm-180 mm, the outer diameter of the cutting end of the tool body is 2 mm-20 mm, and the wall thickness of the tool body is 0.2 mm-2 mm.

[0014] Preferably, a connection between the second cutting edge and the tool body is closer to or farther from the second end than a tip of the first cutting edge.

[0015] Compared with the prior art, the present invention has achieved the following technical effects: The minimally invasive bone harvesting device of the present invention abandons the design of the cutting tool and spiral transmission of the existing minimally invasive bone tissue surgical equipment. It achieves the purpose of obtaining strip bone blocks through the design of the second cutting edge on the cutting tool and realizes power transmission through the transmission design of the connecting piece, thereby achieving the purpose of obtaining complete strip bone blocks in minimally invasive autologous bone transplantation surgery.

[0016] Furthermore, during use, the cutting tool is swung radially, so that the second cutting edge can be used to cut off the root of the taken strip-shaped bone block, thereby facilitating the root cutting operation when taking the strip-shaped bone block.

[0017] Furthermore, the second cutting edge of the minimally invasive bone removal device of the present invention can also play a role in loading materials during use. The angle design of the second cutting edge bending backward (i.e., the end of the tool body away from the cutting end) provides an upward force for material transmission, which can assist the strip bone blocks in the tool to be transmitted along the inner wall of the sleeve to the rear end to the rotating collection bin, making loading smoother and faster.

[0018] Furthermore, the second cutting edge of the minimally invasive bone harvesting device of the present invention can also support the strip bone blocks that have been obtained in the tool during use. In actual operation, when the conventional trephine structure transfers bone tissue, the bone tissue in the trephine often falls off, while the structural design of the second cutting edge bending inward and backward in the present invention can well support the strip bone blocks in the multi-dimensional cutting tool and prevent the cut strip bone blocks from falling off.

[0019] Furthermore, since the present invention abandons the design of the cutting tool and spiral transmission of the existing minimally invasive bone tissue surgical equipment, the minimally invasive bone harvesting device of the present invention can obtain a larger amount of bone through a smaller incision. The present invention can better retain the good osteogenic properties of autologous bone materials, reduce the mechanical movement of tool grinding and spiral channel transmission, and the heat generated will destroy the osteogenic active components in the autologous bone, and completely retain the internal bone tissue structure.

[0020] Furthermore, the rotating collection bin in the present invention rotates coaxially with the cutting tool during operation, and the material collected by the cutting tool can be stored in the rotating collection bin, thereby avoiding the defect of single collection by traditional tools, achieving multiple collections, and improving the efficiency of bone removal.

[0021] Furthermore, a detachable connection using a reverse threaded connection is adopted between the rotating collection bin and the connecting piece, which is convenient for both rotation and detachment, and satisfies both the detachable connection requirements and the fastening connection requirements of the rotating collection bin.

[0022] Furthermore, the plane ball bearing is closer to the cutting tool than the thrust bearing. The combination of the front-placed plane ball bearing and the rear-placed thrust bearing reduces the axial and radial reaction forces caused by cutting while achieving synchronous rotation of the rotating collection bin and the cutting tool, ensuring the axial and radial runout of the rotating collection bin and the cutting tool, improving the axial and radial accuracy, and strengthening the offset of the cutting swing force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a cutting tool in a minimally invasive bone removal device according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of a cutting tool in a minimally invasive bone removal device according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of a minimally invasive bone harvesting device according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of a minimally invasive bone harvesting device according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of a minimally invasive bone harvesting device according to Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the structure of a cutting tool in a minimally invasive bone removal device according to Embodiment 2 of the present invention; in: 100. Cutting tools; 200. Minimally invasive bone harvesting equipment; 1. Tool body; 2. First cutting edge; 3. Second cutting edge; 5. Rotating collection bin; 6. Shell; 7. Connectors; 8. Thrust bearing; 9. Plane ball bearing. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a minimally invasive bone harvesting device to solve the problems existing in the above-mentioned prior art and to achieve the acquisition of strip bone / block bone in minimally invasive autologous bone transplantation surgery.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1 like Figures 1 to 5 As shown, this embodiment provides a minimally invasive bone removal device 200, comprising: A cutting tool 100, the cutting tool 100 comprises a tubular tool body 1, a cutting end of the tool body 1 is provided with a cutting edge, the cutting edge comprises a first cutting edge 2 and a second cutting edge 3, the first cutting edge 2 is serrated, and the direction of the first cutting edge 2 is parallel to the axial direction of the tool body 1; the other end of the tool body 1 is the second end, the second cutting edge 3 is inclined toward the inner side of the tool body 1, the second cutting edge 3 partially blocks the internal channel of the tool body 1, the second cutting edge 3 is located within the axial projection range of the tool body 1, the first cutting edge 2 is used to cut bone tissue, the second cutting edge 3 is used to separate bone tissue, and the first cutting edge 2 and the second cutting edge 3 are used in combination to obtain bone tissue; The second end of the rotating collection chamber 5 is connected to one end of the rotating collection chamber 5, and the bone tissue obtained by cutting by the cutting tool 100 can be moved into the rotating collection chamber 5 through the interior of the tool body 1, and the rotating collection chamber 5 is used to accommodate the bone tissue; The power component is used to drive the rotating collection bin 5 and the cutting tool 100 to rotate around the axis of the tool body 1, and through the rotation of the second cutting edge 3, a transmission force is generated on the bone tissue in the tool body 1 to move toward the second end of the tool body 1, so that the bone tissue in the tool body 1 moves from the tool body 1 to the rotating collection bin 5.

[0029] It should be noted that, in this embodiment, the second cutting edge 3 is also inclined toward the second end of the tool body 1. In actual applications, the second cutting edge 3 can also be inclined toward the inner side of the tool body 1 and away from the second end; but in this embodiment, the second cutting edge 3 is inclined toward the inner side and the second end of the tool body 1, which has a better bone removal efficiency when removing bones.

[0030] In this embodiment, the connection between the second cutting edge 3 and the tool body 1 is closer to the second end of the tool body 1 than the tip of the first cutting edge 2 .

[0031] The minimally invasive bone harvesting device 200 of this embodiment abandons the design of the cutting tool and spiral transmission of the existing minimally invasive bone tissue surgical equipment, and obtains strip-shaped bone blocks through the design of the second cutting edge 3 on the cutting tool 100. The cutting tool 100 and the rotating collection bin 5 are driven by a power component to rotate, thereby achieving the purpose of obtaining complete strip-shaped bone blocks in minimally invasive autologous bone transplantation surgery.

[0032] It should be noted that the rotating collection bin 5 rotates with the cutting tool 100 during operation, and the material collected by the cutting tool 100 can be stored in the rotating collection bin 5, which can avoid the defect that the traditional tool needs to stop cutting and collect aggregates once the material storage inside the tool is full. The capacity of the rotating collection bin 5 is large, and the aggregates in the rotating collection bin 5 can be taken out after multiple collections, thereby improving the efficiency of bone removal.

[0033] In the optional scheme of this embodiment, it is more preferred that the diameter of one end of the rotating collecting chamber 5 close to the cutting tool 100 is larger than the diameter of the second end of the cutting tool 100, and a safety limit step is formed at the end of the rotating collecting chamber 5 close to the cutting tool 100. The safety limit step formed at the connection between the tool body 1 and the rotating collecting chamber 5 allows the tool to enter the patient's bone tissue, but limits the entry of large-caliber components such as the rotating collecting chamber 5, thereby ensuring the safety of the operation.

[0034] In the optional scheme of this embodiment, it is more preferred that the power component includes a housing 6, a drive motor and a control switch, the housing 6 is a gun-type housing, the drive motor is fixed in the housing 6, a motor fixing frame is provided in the housing 6, and the drive motor is fixedly connected to the motor fixing frame, and the control switch is provided on the outer wall of the housing 6, and the control switch is used to control the opening and closing and output power of the drive motor; The other end of the rotating collection bin 5 is reversely threadedly connected to one end of the connecting piece 7, and the other end of the connecting piece 7 is connected to the motor fixing frame through a thrust bearing 8. The connecting piece 7 is arranged in the outer shell 6, and the connecting piece 7 is rotatably matched with the outer shell 6 through a plane ball bearing 9, and the plane ball bearing 9 is closer to the cutting tool 100 than the thrust bearing 8. The output shaft of the driving motor is transmission-connected to the connecting piece 7, so that the driving motor can drive the connecting piece 7, the rotating collection bin 5 and the cutting tool 100 to rotate.

[0035] In this embodiment, the rotating collection bin 5 and the connecting member 7 are connected by a detachable reverse thread connection, which is convenient for both rotation and detachment, and satisfies both the detachable connection requirement and the fastening connection requirement of the rotating collection bin 5.

[0036] The plane ball bearing 9 is made closer to the cutting tool 100 than the thrust bearing 8, that is, the combination of the front plane ball bearing 9 and the rear thrust bearing 8 can realize the synchronous rotation of the rotating collecting bin 5 and the cutting tool 100, reduce the axial and radial reaction forces caused by cutting, ensure the axial and radial runout of the rotating collecting bin 5 and the cutting tool 100, improve the axial and radial accuracy, and strengthen the offset of the cutting swing force.

[0037] Since the second cutting edge 3 in this embodiment is inclined toward the inner side of the tool body 1 and the end of the tool body 1 away from the cutting end, the rotating second cutting edge 3 can play the following three roles during the operation of the cutting tool 100: (1) Material feeding function: the angle of the second cutting edge 3 bending inward and backward (i.e., the end of the tool body 1 away from the cutting end) provides an upward force for the material (cut aggregate) to be transferred, that is, it provides a force for the material to move in the tool body 1 toward the end of the tool body 1 away from the cutting end, which can assist the bone strip in the tool to be transferred along the inner wall of the sleeve to the rear end to the rotating collection bin 5, making material feeding smoother and faster; (2) Root cutting, that is, cutting off the connection between the strip bone block in the tool and the surrounding bone tissue. Conventional trephine structures can drill out strip bone blocks, but how to completely remove the strip bone block from under the bone tissue is a technical difficulty, and the second cutting edge 3 that cuts inward can solve this problem well. After a sufficient amount of strip bone is obtained by the vertically cutting first cutting edge 2 and enters the sleeve, the tool is swung so that the second cutting edge 3 that cuts inward at the front end of the tool cuts the root of the strip bone block horizontally, cutting off the connection between the root of the strip bone block and the surrounding bone tissue, thereby obtaining a complete strip of autologous bone; (3) Supporting function: the second cutting edge 3 can support the bone strip that has been obtained in the tool. In actual operation, when the conventional trephine structure transfers bone tissue, the bone tissue in the trephine often falls off. However, the structural design of the second cutting edge 3 bending inward and backward in the present invention can well support the bone strip in the multi-dimensional cutting tool 100 and prevent the cut bone strip from falling off.

[0038] For the above three functions of the second cutting edge 3, the setting parameters of the inclination angle of the second cutting edge 3 are the key. Reasonable inclination angle setting can realize material transmission and control the transmission speed, control the amount of bone removal, and prevent bone tissue from clogging or falling in the tool. Based on a large amount of experimental data of the applicant, the cross section of the connection between the second cutting edge 3 and the tool body 1 is taken as the reference plane, and the angle between the second cutting edge 3 cutting inward and the reference plane (i.e. Figure 2 The suitable range of the A angle in the figure is A, and 0°≤A<90°.

[0039] It is worth noting that in actual applications, the number of second cutting edges 3 can be adaptively adjusted as needed, such as being set to two, three or even more; when the number of second cutting edges 3 is at least two, all second cutting edges 3 are distributed along the circumference of the tool body, and there is a gap between any two adjacent second cutting edges 3; and no matter how many total number of second cutting edges 3 is, the proportion of all second cutting edges 3 in the circumference of the cutting end of the tool body 1 is 5%-85%.

[0040] In this embodiment, the tool body 1 is a tapered tube, and the diameter of the tool body 1 gradually increases from the cutting end to the other end of the tool body 1; in this embodiment, the taper of the tool body 1 is 0°~45°. The purpose of making the tool body 1 a tapered tube in this embodiment is to improve the smoothness of the transmission of the strip bone block in the tool body 1 during bone removal and avoid the blockage of the strip bone block in the tool body 1. In actual applications, technicians can adaptively adjust the change of the diameter of the tool body 1 according to actual needs, for example, the diameter of each part of the tool body 1 can be made consistent, that is, the tool body adopts a straight tube.

[0041] In the optional scheme of this embodiment, it is more preferred that the length of the tool body 1 is 20mm-180mm, the outer diameter of the cutting end of the tool body 1 is 2mm-20mm, and the wall thickness of the tool body 1 is 0.2mm-2mm.

[0042] The outer diameter of the cutting end of the tool body 1 is 2mm-20mm for comprehensive consideration of achieving a minimal incision and obtaining a complete strip of bone. Under this outer diameter, bone removal can be achieved with a minimal incision, and a complete strip of bone that meets the requirements of bone grafting can also be obtained. The length of the tool body 1 is set to 20mm-180mm, considering that this length range can meet the bone removal requirements of different donor sites.

[0043] In the optional scheme of this embodiment, it is more preferred that a pressure sensor is sandwiched between the thrust bearing 8 and the connecting piece 7, an alarm module is provided on the outer shell 6, a controller is fixedly provided in the outer shell 6, and the pressure sensor, the drive motor and the alarm module are electrically connected to the controller respectively; the pressure sensor is used to detect and identify the pressure transmitted from the tool body 1 to the thrust bearing 8.

[0044] The purpose of setting up a pressure sensor is to: Human bones are divided into cortical bones and cancellous bones, and the hardness of cortical bones is generally greater than that of cancellous bones. In the specific bone extraction operation, the operator needs to apply force to the minimally invasive bone extraction device so that the minimally invasive bone extraction device cuts the bone tissue. The front end of the cutting end of the tool body 1 will be subjected to the reaction force of the part to be cut, and the force is transmitted to the pressure sensor; when the cutting end of the tool body 1 cuts the cortical bone, because the cortical bone is harder, the operator needs to apply a greater force to the device to cut the bone tissue. When the force detected by the pressure sensor is greater than the set value, the controller will control the alarm module to send an alarm signal and automatically shut down the drive motor to cut off the power output to prevent the tool from penetrating the cortical bone and causing unnecessary damage; the alarm module can specifically use a buzzer.

[0045] Embodiment 2 like Figure 6 As shown, this embodiment provides a minimally invasive bone harvesting device 200. The minimally invasive bone harvesting device 200 of this embodiment is basically the same as the minimally invasive bone harvesting device 200 of the first embodiment in structure and principle, and the only difference is that: In the tool body 1 of the present embodiment, the connection between the second cutting edge 3 and the tool body 1 is farther away from the second end than the tip of the first cutting edge 2, and the distance between the connection between the second cutting edge 3 and the tool body 1 and the tip of the first cutting edge 2 is less than or equal to two-thirds of the diameter of the cutting end of the tool body 1. When removing bones, the second cutting edge 3 is used as the main cutting edge to increase the transmission speed of the cut aggregate in the tool body 1; the tool body 1 of the present embodiment adopts a straight tube.

[0046] In the description of the present invention, it should be noted that, in addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A minimally invasive bone harvesting device, characterized in that: include: A cutting tool, the cutting tool comprising a tubular tool body, a cutting end of the tool body being provided with a cutting edge, the cutting edge comprising a first cutting edge and a second cutting edge, the first cutting edge being serrated, and the first cutting edge being oriented parallel to the axial direction of the tool body; the other end of the tool body being the second end, the second cutting edge being inclined toward the inner side of the tool body, the second cutting edge being located within the axial projection range of the tool body, the first cutting edge being used for cutting bone tissue, the second cutting edge being used for separating bone tissue, and the first cutting edge and the second cutting edge being used in combination to obtain bone tissue; A rotating collection bin, wherein the second end is connected to one end of the rotating collection bin, and the bone tissue obtained by cutting the cutting tool can be moved into the rotating collection bin through the interior of the tool body, and the rotating collection bin is used to accommodate the bone tissue; A power component is used to drive the rotating collection bin and the cutting tool to rotate around the axis of the tool body, and through the rotation of the second cutting edge, a transmission force is generated on the bone tissue in the tool body to move toward the second end of the tool body, so that the bone tissue in the tool body moves from the tool body to the rotating collection bin.

2. The minimally invasive bone harvesting device according to claim 1, characterized in that: The power component includes a housing, a drive motor and a control switch. The housing is a gun-type housing. The drive motor is fixedly arranged in the housing. A motor fixing frame is arranged in the housing, and the drive motor is fixedly connected to the motor fixing frame. The control switch is arranged on the outer wall of the housing. The control switch is used to control the opening and closing and output power of the drive motor. The other end of the rotating collection bin is detachably connected to one end of the connecting piece, and the other end of the connecting piece is connected to the motor fixing frame via a thrust bearing. The connecting piece is arranged in the outer shell, and the connecting piece is rotatably matched with the outer shell via a plane ball bearing, and the plane ball bearing is closer to the cutting tool than the thrust bearing, and the output shaft of the driving motor is transmission-connected to the connecting piece.

3. The minimally invasive bone harvesting device according to claim 2, characterized in that: The rotating collection bin is reversely threadedly connected to the connecting piece.

4. The minimally invasive bone harvesting device according to claim 1, characterized in that: Taking the cross section of the connection between the second cutting edge and the tool body as a reference plane, the angle between the second cutting edge and the reference plane is A, and 0°≤A<90°.

5. The minimally invasive bone harvesting device according to claim 1, characterized in that: The number of the second cutting edges is several; when the number of the second cutting edges is at least two, all of the second cutting edges are distributed along the circumference of the tool body, and there is a gap between any two adjacent second cutting edges; the proportion of the circumference of the cutting end occupied by all of the second cutting edges in the circumference of the tool body is 5%-85%.

6. The minimally invasive bone harvesting device according to claim 2, characterized in that: A pressure sensor is sandwiched between the thrust bearing and the connecting member, an alarm module is arranged on the housing, a controller is fixedly arranged in the housing, and the pressure sensor and the alarm module are electrically connected to the controller respectively.

7. The minimally invasive bone harvesting device according to claim 1, characterized in that: The tool body is a tapered tube, and the diameter of the tool body gradually increases from the cutting end to the other end of the tool body; the taper of the tool body is 0°~45°.

8. The minimally invasive bone harvesting device according to claim 1, characterized in that: The length of the tool body is 20mm-180mm, the outer diameter of the cutting end of the tool body is 2mm-20mm, and the wall thickness of the tool body is 0.2mm-2mm.

9. The minimally invasive bone harvesting device according to claim 1, characterized in that: The connection between the second cutting edge and the tool body is closer to or farther from the second end than the tip of the first cutting edge.

Images