Double-shoulder osteotome capable of realizing accurate positioning and controllable direction in operation

Abstract

The invention provides a double-shoulder osteotome capable of realizing accurate positioning and controllable direction in an operation, which comprises an osteotome body provided with a blade for cutting solid tissues; the positioning bracket is connected with the osteotome body and is used for indicating the position and posture of the double-shoulder osteotome; the cutting edge positioning module and the double-shoulder bone knife are designed in a split mode, and the cutting edge positioning module is used for calibrating the cutting edge; the connection between the positioning support and the osteotome body has a movable state that the positioning support rotates along the osteotome body and a locking state that the positioning support is locked at a certain rotation angle. According to the osteotome, through the accurate mechanical structure and the auxiliary system, accurate control over the position and direction of the osteotome in the operation process is achieved, and the accuracy and safety of the operation are improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a double-shoulder bone knife capable of achieving precise intraoperative positioning and direction control. Background Art

[0002] In traditional periacetabular osteotomy surgery, the positioning and direction control of the bicuspid osteotomy knife mainly rely on the doctor's experience and feel, which greatly limits the accuracy and repeatability of the surgery. Precise positioning and direction control are key factors in improving the success rate of the surgery and the patient's recovery effect.

[0003] Therefore, there is an urgent need to develop a double-shoulder bone knife that can achieve precise positioning and direction control during surgery. Summary of the invention

[0004] The problem solved by the present application is the urgent need to develop a double-shoulder bone knife that can achieve precise positioning and direction control during surgery.

[0005] In order to solve the above problems, the present application provides a double-shoulder bone knife that can achieve precise positioning and direction control during surgery, which includes:

[0006] The bone knife body has a blade for cutting solid tissue;

[0007] A positioning bracket, connected to the bone cutter body, for indicating the position and posture of the double-shoulder bone cutter;

[0008] A blade positioning module, which is designed separately from the double shoulder bone knife, is used to calibrate the blade;

[0009] The connection between the positioning bracket and the bone cutter body includes an active state in which the positioning bracket rotates along the bone cutter body, and a locked state in which the positioning bracket is locked at a certain rotation angle.

[0010] Furthermore, the blade positioning module comprises a display frame and a blade slot, the shape of the blade slot is adapted to the blade, and the display frame is used to indicate the position and posture of the blade positioning module when the blade is inserted into the blade slot.

[0011] Furthermore, the bone knife body includes a holding portion and a cutting portion, the holding portion is rotatably connected to the positioning bracket, and the cutting edge is arranged on the cutting portion; the holding portion and the cutting portion are detachably connected.

[0012] Furthermore, the cutting portion is in the shape of a long rod, and a ring-shaped slot and a quick-connect slot are sequentially arranged at the rear end toward the front; a quick-connect piece and a buffer piece are sequentially arranged at the front end toward the rear; the quick-connect piece and the quick-connect slot are adapted to be quickly connected; and the buffer piece and the ring-shaped slot are adapted to be buffered.

[0013] Furthermore, the annular groove is arranged at the tail end of the cutting part, and is an annular groove formed by being recessed inward along the outer surface of the cutting part, and the longitudinal section of the annular groove is a triangle; the buffer is an annular buckle of corresponding shape, and the buffer is independently arranged from the holding part.

[0014] Furthermore, a columnar opening is provided at the front end of the gripping portion, and the buffer is provided in a cylindrical space at the bottom of the columnar opening; the buffer is connected to the cylindrical space via a first spring and a second spring.

[0015] Furthermore, the first spring and the second spring respectively abut against the front end surface and the rear end surface of the buffer to limit the buffer; the other ends of the first spring and the second spring are fixed in the cylindrical space.

[0016] Furthermore, the spring coefficient of the second spring is greater than the spring coefficient of the first spring.

[0017] Furthermore, a rotatable component is embedded on the outer side of the gripping portion, and the rotatable component is fixedly connected to the positioning bracket.

[0018] Furthermore, the outer side of the gripping portion is recessed inwards to form a thin shaft; a roller is provided on the thin shaft, and a cylindrical through hole is provided in the rotatable member, and the through hole is sleeved on the roller, so that the rotatable member rotates around the thin shaft.

[0019] Furthermore, a pressing piece is provided near the thin shaft portion of the gripping portion, and the pressing piece is an inverted U-shaped structure, one end of which extends out of the gripping portion for pressing; and the other end extends from one side of the thin shaft to abut against the cylindrical through hole.

[0020] Furthermore, a plurality of slots are provided on the inner wall of the cylindrical through hole near one end of the pressing member, and the slots are adapted in shape to one end of the pressing member to lock the rotatable member.

[0021] Furthermore, the blade is crescent-shaped, high on both sides and low in the middle, and the heat treatment hardness of the blade is 52-56HRC.

[0022] Furthermore, the width of the blade is in the range of 1.5 cm to 3 cm.

[0023] Furthermore, the blade and the rear end axis of the cutting portion present an arc transition angle of 30 degrees inward.

[0024] In the present application, precise control of the position and direction of the osteotome during surgery is achieved through precise mechanical structure and auxiliary system, thereby improving the accuracy and safety of the surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a schematic diagram of the structure of the double shoulder bone knife of this application;

[0026] Figure 2 This is a cross-sectional schematic diagram of the double shoulder bone knife of the present application;

[0027] Figure 3 This is a cross-sectional schematic diagram of the double-shoulder bone knife gripping portion of the present application;

[0028] Figure 4 A schematic diagram of the detachable connection of the double shoulder bone knife of the present application;

[0029] Figure 5 This is the internal structure diagram of the rotatable part of the double-shoulder bone cutter of this application;

[0030] Figure 6 This is a structural diagram of the rotatable part of the double-shoulder bone knife in this application.

[0031] Explanation of the reference numerals: 1-bone knife body; 10-gripping part; 11-rotatable part; 12-thin shaft; 13-roller; 14-pressing part; 15-cylindrical through hole; 16-slot; 17-quick-connecting part; 18-buffering part; 20-cutting part; 21-annular slot; 22-quick-connecting slot; 23-first spring; 24-second spring; 25-third spring; 3-positioning bracket. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0033] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0034] In traditional periacetabular osteotomy surgery, the positioning and direction control of the bicuspid osteotomy knife mainly rely on the doctor's experience and feel, which greatly limits the accuracy and repeatability of the surgery. Precise positioning and direction control are key factors in improving the success rate of the surgery and the patient's recovery effect.

[0035] Conventional double-shoulder bone knives generally achieve precise positioning by setting up a fixed positioning frame (an external positioning device can determine the exact position of the double-shoulder bone knife through the positioning frame), but the positioning range of this fixed positioning frame is limited. If the external positioning device is within the range, positioning can be achieved. If it is not within the range, positioning cannot be achieved.

[0036] In addition, for the double-shoulder bone knife, during its specific use, it is necessary to adapt in different directions according to the left and right acetabulum of the hip joint. For example, if osteotomy is performed on the left acetabulum, the fixed positioning frame may face the right side, and conversely, if surgery is performed on the right acetabulum, the positioning frame may face the left side; however, for the peripheral positioning device, due to the needs of the operation, it may be set on a fixed side (such as the left or right side), which may result in the double-shoulder bone knife being unable to be positioned during the operation, or the direction of the double-shoulder bone knife being limited (in order to be able to be positioned, the positioning frame of the double-shoulder bone knife must face a specific position, and the direction of the bone knife is also restricted at this time).

[0037] During the operation, if there is a lack of precise control of the bone knife, slight errors during the operation may lead to unsatisfactory surgical results and even cause complications: such as sciatic fracture or posterior column fracture, causing great pain to the patient.

[0038] Therefore, developing a double-shoulder bone knife that can achieve precise intraoperative positioning and direction control not only meets clinical needs, but also conforms to the current trend of medical technology development and has significant growth potential and application value.

[0039] In response to the above problems, the present application provides a new double-shoulder bone knife that can rotate a positioning frame to achieve precise positioning with controllable direction to avoid affecting the positioning accuracy.

[0040] In the present application, the direction perpendicular to the axis and pointing to the axis is "inside", and the direction perpendicular to the axis and away from the axis is "outside"; the direction along the axis and pointing to the blade on the probe is "front", and the direction along the axis and away from the blade is "back".

[0041] The embodiment of the present application provides a double-shoulder bone knife that can achieve precise positioning and direction control during surgery. The structure of the double-shoulder bone knife is as follows: Figure 1-Figure 5 As shown, the double-shoulder bone knife capable of achieving precise intraoperative positioning and direction control comprises:

[0042] The bone cutter body 1 has a blade for cutting solid tissue;

[0043] A positioning bracket 3, connected to the bone cutter body 1, for indicating the position and posture of the double-shoulder bone cutter;

[0044] A blade positioning module (not shown) is designed separately from the double shoulder bone knife to calibrate the blade;

[0045] The connection between the positioning bracket 3 and the bone cutter body 1 has an active state in which the positioning bracket 3 rotates along the bone cutter body 1, and a locked state in which the positioning bracket 3 is locked at a certain rotation angle.

[0046] In the present application, the positioning frame is set to be rotatable, so that the orientation of the positioning frame can be adjusted as needed in actual use, thereby achieving precise positioning and direction control during surgery.

[0047] In the present application, precise control of the position and direction of the osteotome during surgery is achieved through precise mechanical structure and auxiliary system, thereby improving the accuracy and safety of the surgery.

[0048] Furthermore, the blade positioning module comprises a display frame and a blade slot, the shape of the blade slot is adapted to the blade, and the display frame is used to indicate the position and posture of the blade positioning module when the blade is inserted into the blade slot.

[0049] In the present application, the blade slot is adapted to the unique posture of the blade, so that the blade can only be inserted into the blade slot in a unique posture; the blade slot and the display frame have a fixed relative position; when the blade is inserted into the blade slot, the corresponding coordinates of the blade slot can be determined by the display frame, and the corresponding posture and coordinates of the blade are also determined; at this time, the positioning bracket on the bone knife body is also identified at the same time, so as to determine the relative position of the positioning bracket and the blade posture. This relative position can determine the posture position of the blade in real time during the subsequent use of the bone knife.

[0050] In the present application, the blade positioning module is used to locate and correct the position and direction of the bone knife blade.

[0051] Furthermore, the bone knife body 1 includes a holding portion 10 and a cutting portion 20, the holding portion 10 is rotatably connected to the positioning bracket 3, and the cutting edge is arranged on the cutting portion 20; the holding portion 10 and the cutting portion 20 are detachably connected.

[0052] In the present application, the gripping part is used for holding, and the cutting part is used for cutting bone tissue. The gripping part 10 and the cutting part 20 are detachably connected, that is, the gripping part and the cutting part can be detached, so as to replace different cutting parts.

[0053] In this application, the connection between the gripping part and the cutting part is a unique posture connection, that is, the cutting part can only be connected to the gripping part in a preset posture. In this way, the posture of the gripping part-cutting part is uniquely determined after the connection (if it is not uniquely determined, it means that the relative angle between the cutting part and the gripping part cannot be determined, and accurate measurement during the operation cannot be performed), avoiding the situation where the cutting part is rotated before connection.

[0054] Furthermore, the cutting portion 20 is in the shape of a long rod, and a circular slot 21 and a quick-connect slot 22 are sequentially arranged at the rear end toward the front; a quick-connect piece 17 and a buffer piece 18 are sequentially arranged at the front end toward the rear of the holding portion 10; the quick-connect piece 17 and the quick-connect slot 22 are adapted to be quickly connected; and the buffer piece 18 and the circular slot 21 are adapted to be buffered.

[0055] In this application, combined Figure 4 As shown, an annular slot 21 and a quick-connect slot 22 are sequentially arranged along the direction from the rear end to the front end of the cutting portion; wherein the annular slot 22 is adapted to the buffer member 18 and they are elastically connected to each other.

[0056] In the present application, after the cutting part is inserted into the holding part, the quick connector 17 is engaged with the quick connector slot, thereby locking the cutting part to achieve a fixed connection. The specific engaging structure is not limited in the present application and will not be described in detail.

[0057] In the present application, the buffer member and the annular groove are adapted to buffer the insertion action of the cutting part to avoid failure to insert according to the preset size. The buffer member and the annular groove are elastically matched to avoid the situation where the buffer cannot be buffered.

[0058] Furthermore, the annular groove 21 is arranged at the rear end of the cutting portion 20, and is an annular groove formed by being recessed inward along the outer surface of the cutting portion 20, and the longitudinal section of the annular groove 21 is a triangle; the buffer 18 is an annular buckle of corresponding shape, and the buffer 18 is independently arranged from the holding portion 10.

[0059] In the present application, a circular groove with a triangular longitudinal section is provided, and the buffer is also a corresponding triangular buckle, so that when the cutting part is inserted, it is easy to pull out; when it is pulled out, it is easy to insert, thereby avoiding affecting the detachable connection of the cutting part.

[0060] In the present application, a cross section refers to a plane figure obtained by cutting a geometric body or a physical object with a plane perpendicular to a specific direction (usually the axis of the object).

[0061] In this application, a longitudinal section refers to a plane figure obtained by cutting an object with a plane along a direction parallel to the axis of the object. Compared with a cross section, a longitudinal section shows more of the shape and changes of an object in the axis direction.

[0062] In short, the cross section is the cross section of an object in the horizontal direction, and the longitudinal section is the cross section of an object in the vertical direction.

[0063] Furthermore, a columnar opening is provided at the front end of the gripping portion 10 , and the buffer 18 is provided in a cylindrical space at the bottom of the columnar opening; the buffer 18 is connected to the cylindrical space via a first spring 23 and a second spring 24 .

[0064] Furthermore, the first spring 23 and the second spring 24 respectively abut against the front end surface and the rear end surface of the buffer 18 to limit the buffer 18; the other ends of the first spring 23 and the second spring 24 are fixed in the cylindrical space.

[0065] Furthermore, the spring coefficient of the second spring 24 is greater than the spring coefficient of the first spring 23 .

[0066] In the present application, two springs are provided to achieve the buffering effect of the buffer member 18. The spring coefficient of the second spring is set to be larger, so that after the buffer member 18 moves backward, it is easier to rebound back to the preset position.

[0067] Preferably, a trigger is also provided, which is connected to the bottom surface of the cylindrical space at the bottom of the columnar opening through the third spring 25 (i.e., it is similar to the second spring 24). And a gap is set between the trigger and the cutting part in the installed state (there is a small gap in the middle). In this way, the trigger will not be triggered during normal installation; but when the cutting part is too deep and cannot be fixed (it may also be that the size of the cutting part changes), the trigger will be triggered, thereby reminding the user to replace or reinstall.

[0068] In this way, by providing the triggering member, the accuracy of the cutting portion and the holding portion after installation is ensured.

[0069] In the present application, the triggering member may be an electrical component such as a travel switch, or may be other components, which is not specifically limited in the present application.

[0070] Furthermore, a rotatable component 11 is embedded on the outer side of the gripping portion 10 , and the rotatable component 11 is fixedly connected to the positioning bracket 3 .

[0071] The rotatable member is connected to the outside of the gripping portion 10 and can rotate around the axis of the gripping portion; the rotatable member is fixedly connected to the positioning bracket, thereby driving the positioning bracket to rotate synchronously when rotating.

[0072] Furthermore, the outer side of the gripping portion 10 is recessed inward to form a thin shaft 12 ; a roller 13 is provided on the thin shaft 12 ; a cylindrical through hole 15 is provided in the rotatable member 11 , and the through hole is sleeved on the roller 13 , so that the rotatable member 11 rotates around the thin shaft 12 .

[0073] Among them, the full name of the roller is rolling bearing, which is used to support the rotating shaft and parts on the shaft, and to maintain the normal working position and rotation accuracy of the shaft.

[0074] In the present application, the inner side of the roller is a thin shaft, and the outer side is a rotatable member, so that the rotatable member can flexibly rotate around the thin shaft.

[0075] In the present application, the diameter of the thin shaft is smaller than the diameter of the gripping portion, thereby forming an inward recess to accommodate the roller and part of the rotatable member.

[0076] Furthermore, a pressing piece 14 is provided at the gripping portion 10 near the thin shaft 12 . The pressing piece 14 is an inverted U-shaped structure, one end of which extends out of the gripping portion 10 for pressing; and the other end extends from one side of the thin shaft 12 to abut against the cylindrical through hole 15 .

[0077] In the present application, it can be seen from the cross section that the pressing member is an inverted U-shaped structure with one long and one short side; the short end extends from one side of the thin shaft 12 to abut against the cylindrical through hole of the rotatable member to fix the rotatable member; the long end extends out of the gripping portion to facilitate external force pressing.

[0078] In this way, by pressing the long end, the short end will move synchronously toward the axis center, and no longer abut against the cylindrical through hole 15, so the rotatable part can rotate freely; by releasing the long end, the short end will move synchronously away from the axis center, and abut against the cylindrical through hole 15, so the rotatable part is fixed.

[0079] Preferably, a return spring is provided at the long end of the pressing member 14 , one end of the return spring abuts against the pressing member 14 , and the other end abuts against the gripping portion, so that the long end is extended outward in the absence of external force.

[0080] Furthermore, a plurality of slots 16 are provided on the inner wall of the cylindrical through hole 15 near one end of the pressing member 14 , and the slots 16 are adapted in shape to one end of the pressing member 14 to lock the rotatable member 11 .

[0081] In this way, the short end of the pressing piece is inserted into the slot to lock the rotatable piece; when pressed, the short end of the pressing piece exits the slot and the rotatable piece can rotate freely.

[0082] Preferably, the plurality of slots 16 are evenly distributed along the circumferential direction, so as to facilitate rotation and snap-fitting, thereby improving the uniformity and accuracy of fixing of the rotatable part.

[0083] Furthermore, the blade is crescent-shaped, high on both sides and low in the middle, and the heat treatment hardness of the blade is 52-56HRC.

[0084] Furthermore, the width of the blade is in the range of 1.5 cm to 3 cm.

[0085] Furthermore, the blade and the rear end axis of the cutting portion 20 present an inwardly arc-shaped transition angle of 30 degrees.

[0086] In the present application, precise control of the position and direction of the osteotome during surgery is achieved through precise mechanical structure and auxiliary system, thereby improving the accuracy and safety of the surgery.

[0087] In this application, the bone knife body is made of 5Cr15MoV material; the blade is crescent-shaped, high on both sides and low in the middle, and the blade has different widths ranging from 1.5cm to 3.0cm according to needs. The distal blade and the handle are at an angle of 30 degrees inwardly, and the edges of the bone knife are chamfered; the heat treatment hardness of the bone knife body is 52-56HRC,

[0088] In the present application, the grip portion has an anti-slip effect, is designed to have a good grip, and is ergonomic. The end of the handle is reinforced to be suitable for strong knocking and can withstand long-term repeated knocking.

[0089] In the present application, the grip itself has laser engraved direction indicators (arrow in the middle, dotted lines on both sides, and can also be marked with lines of different colors), which can prevent the rotation and locking structure from failing during surgery, and can promptly detect and adjust the direction of the bone knife blade, thereby playing a double protection role.

[0090] In this application, an adjustable direction control mechanism is installed on the double-shoulder bone knife: by pressing the pressing piece, the positioning frame can rotate clockwise or counterclockwise, which is convenient for the surgeon to operate the osteotomy. After releasing the pressing piece, the positioning frame and the bone knife body are locked, and the directions of the two can no longer be rotated. This device allows the doctor to adjust the direction of the bone knife according to the surgical situation and the disease during the operation. After the adjustment, the blade needs to be repositioned and verified.

[0091] In the present application, the double-shoulder bone knife includes a rotating shaft (thin shaft) and a locking mechanism to ensure that the bone knife can be fixed after being adjusted to an ideal angle.

[0092] In one embodiment, a plurality of positioning balls are disposed on the positioning frame / display frame. The positioning balls are arranged in irregular shapes and are suitable for positioning the position of the optical probe.

[0093] Specifically, the surface of the positioning ball is coated with a coating; in this way, a better recognition effect can be achieved.

[0094] Specifically, several positioning balls are arranged in irregular shapes, that is, the figure with the positioning balls as the top is an irregular figure; through the irregular arrangement, it can be avoided that the figure composed of the positioning balls is similar to or overlaps with the original figure after being moved or folded in space, thereby interfering with positioning.

[0095] Furthermore, the double-shoulder osteotome device can be connected to the robot's mechanical arm. The screen of the trolley can clearly display the precise position of the pelvis and osteotome during the operation in real time, and the surgeon can operate and adjust according to the displayed position. The computer will also give the corresponding osteotomy planning path and suggestions in real time.

[0096] In the present application, additional positioning equipment is used to capture the position information of the first reference array (grip portion) and the second reference array (blade).

[0097] In this application, a computer-aided system connected to the positioning equipment is used to construct a three-dimensional model of a bone knife and a three-dimensional spatial position of a blade positioning module in a virtual scene, and to calibrate the posture of the three-dimensional model of the bone knife in the virtual scene according to the posture information obtained by the positioning equipment.

[0098] In the description of the present application, it should be understood that the terms "high temperature" and "low temperature" are relative temperatures, not absolute temperatures. They are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have an absolute temperature. Therefore, they should not be understood as limitations on the present application.

[0099] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0100] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0101] In this application, unless otherwise clearly specified and limited, the terms "disposed", "connected", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0102] In the present application, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first and second features are in direct contact with each other, or the first and second features are in indirect contact with each other through an intermediate medium.

[0103] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other.

[0104] It should be noted that in the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some embodiments, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0105] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A double-shoulder bone knife that can achieve precise positioning and direction control during surgery, characterized in that: include: The bone knife body has a blade for cutting solid tissue; A positioning bracket, connected to the bone cutter body, for indicating the position and posture of the double-shoulder bone cutter; A blade positioning module, which is designed separately from the double shoulder bone knife, is used to calibrate the blade; The connection between the positioning bracket and the bone cutter body includes an active state in which the positioning bracket rotates along the bone cutter body, and a locked state in which the positioning bracket is locked at a certain rotation angle.

2. The double-shoulder bone knife capable of achieving precise positioning and direction control during surgery according to claim 1, characterized in that: The blade positioning module comprises a display frame and a blade slot. The shape of the blade slot is adapted to the blade. The display frame is used to indicate the position and posture of the blade positioning module when the blade is inserted into the blade slot.

3. The double-shoulder bone knife capable of achieving precise positioning and direction control during surgery according to claim 1, characterized in that: The bone knife body comprises a holding part and a cutting part, wherein the holding part is rotatably connected to the positioning bracket, and the cutting edge is arranged on the cutting part; the holding part and the cutting part are detachably connected.

4. The double-shoulder bone knife capable of achieving precise positioning and direction control during surgery according to claim 3, characterized in that: The cutting part is in the shape of a long rod, and a circular slot and a quick-connect slot are sequentially arranged at the rear end in the forward direction; a quick-connect piece and a buffer piece are sequentially arranged at the front end of the holding part in the backward direction; the quick-connect piece and the quick-connect slot are adapted to be quickly connected; and the buffer piece and the circular slot are adapted to be buffered.

5. The double-shoulder bone knife capable of achieving precise positioning and direction control during surgery according to claim 3, characterized in that: A rotatable component is embedded on the outside of the gripping portion, and the rotatable component is fixedly connected to the positioning bracket.

6. The double-shoulder bone knife capable of achieving precise positioning and direction control during surgery according to claim 5, characterized in that: The outer side of the gripping portion is recessed inwards to form a thin shaft; a roller is arranged on the thin shaft, and a cylindrical through hole is arranged in the rotatable member, and the through hole is sleeved on the roller, so that the rotatable member rotates around the thin shaft.

7. The double-shoulder bone knife capable of achieving precise positioning and direction control during surgery according to claim 6, characterized in that: The gripping portion is provided with a pressing piece near the thin shaft portion. The pressing piece is an inverted U-shaped structure, one end of which extends out of the gripping portion for pressing; and the other end extends from one side of the thin shaft to abut against the cylindrical through hole.

8. The double-shoulder bone knife capable of achieving precise positioning and direction control during surgery according to claim 7, characterized in that: A plurality of slots are arranged on the inner wall of the cylindrical through hole near one end of the pressing member, and the slots are adapted in shape to one end of the pressing member so as to lock the rotatable member.

9. The double-shoulder bone knife capable of achieving precise positioning and direction control during surgery according to any one of claims 1 to 8, characterized in that: The blade is crescent-shaped, high on both sides and low in the middle, and the heat treatment hardness of the blade is 52-56HRC.

10. The double shoulder bones capable of achieving precise positioning and direction control during surgery according to any one of claims 1 to 8.

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