Knee joint meniscus anterior angle knife and use method

Abstract

The invention belongs to the technical field of scalpels, and particularly relates to a knee joint meniscus anterior angle knife and a using method. The knee joint meniscus anterior angle knife comprises a rotating base with a cavity in the middle; the knob is fixedly arranged at the front end of the rotary base; the telescopic rotating body is arranged in the rotating base in a sleeving manner; a cutting force feedback mechanism; one end of the compression spring abuts against the battery, and the other end of the compression spring abuts against the pressure sensor; a tool bit; an internal thread piece is arranged between the telescopic rotating body and the knob; an external thread matched with the internal thread piece is arranged on the telescopic rotating body; and the internal thread piece and the knob are fastened / separated through the fastening regulation and control assembly. In the using process, a doctor only needs to control the speed of the rotary knob to control the cutter outlet speed and the rotating angle of the rotary knob, the cutter outlet length and the cutting angle of the cutter head can be controlled, and the problems that in the prior art, due to a traditional straight cutter outlet mode, mistaken cutting and tipping are likely to happen, and the cutting angle is not accurately adjusted are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of surgical knives, and in particular relates to a knee joint meniscus anterior angle knife and a use method thereof. Background Art

[0002] Arthroscopic discoid meniscus reshaping is a commonly used surgery for the clinical treatment of patients with discoid meniscus injuries in the knee joint. It can preserve the structure and function of the meniscus to the maximum extent, thereby protecting the knee cartilage and delaying the development of osteoarthritis in patients. When performing arthroscopic discoid meniscus reshaping, the doctor needs to use an anterior angle knife to perform shaping and repair on the anterior angle of the meniscus. Specifically, during the operation, the doctor uses a scalpel to clean the synovium, meniscus, cartilage and other tissues in the joint or to remove osteophytes and articular surfaces in the joint to achieve the treatment purpose.

[0003] Existing anterior angle knives, such as patent publication numbers CN215739306U and CN213217460U, have fixed blades and steering angles, and a single cutting method. They cannot meet the cutting angle and cutting depth requirements of different patients at different positions, and cannot achieve real-time adjustment of the blade length and blade angle of the anterior angle knife, resulting in inaccurate cutting, miscutting or chipping of the blade, causing damage to articular cartilage and soft tissue. Furthermore, although patent publication number CN213641084U can adjust the angle of the knife by rotating the rear end grip handle as needed, after the angle is rotated, the inclination angle direction of the anterior angle knife cannot be fixed during the cutting process, causing changes in the cutting position and cutting force, resulting in miscutting or chipping of the blade, and the doctor cannot obtain force feedback information in time during the operation to control the amount of force applied in real time. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the anterior corner knife in the prior art that is prone to miscutting, chipping, and inaccurate adjustment of the cutting angle and blade length, and to provide a knee meniscus anterior corner knife and a method of use that can realize real-time adjustment of the cutting angle, blade length and cutting force by simply rotating the knob at the rear end of the anterior corner knife.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] As a first aspect, a knee joint meniscus anterior corner knife comprises:

[0007] A rotating base with a cavity in the middle;

[0008] A knob fixedly arranged at the front end of the rotating base

[0009] A telescopic rotating body is sleeved in the rotating base, and the front end of the telescopic rotating body extends out of the rotating base;

[0010] A cutter head connected to the telescopic rotating body through an adjustment assembly;

[0011] A cutting force feedback mechanism, the cutting force feedback mechanism comprising a pressure sensor installed at the rear end of the adjustment assembly, a battery installed on the rear wall of the rotating base, and an indicator light arranged at the end of the rotating base;

[0012] A compression spring, one end of which abuts against the battery, and the other end of which abuts against the pressure sensor;

[0013] Among them, an internal threaded part is arranged between the telescopic rotating body and the knob; an external thread matching with the internal threaded part is arranged on the telescopic rotating body; the internal threaded part and the knob are fastened / separated by a fastening and regulating component.

[0014] Furthermore, the blade extension length of the cutter head and the cutting angle of the cutter head are synchronously adjusted in direct proportion, that is, the longer the blade extension length of the cutter head relative to the telescopic rotating body, the greater the cutting angle of the cutter head on the anterior horn of the human meniscus.

[0015] Furthermore, a handle is sleeved on the outer side of the telescopic rotating body; an angle scale is provided at the end of the handle close to the knob, and a zero return boss is provided on the knob;

[0016] In a natural state, the telescopic rotating body is in a retracted state, the blade head is completely retracted into the handle, and the zero return boss on the knob is aligned with the 0 scale on the handle.

[0017] Furthermore, the tightening and adjusting component includes a tightening hole provided on the knob and a tightening screw matched with the tightening hole.

[0018] Furthermore, the telescopic rotating body comprises two semi-cylindrical assemblies, a plurality of connecting columns arranged between the two semi-cylindrical assemblies, and notches opened at the rear ends of the two semi-cylindrical assemblies;

[0019] The connecting column is arranged on the edge where the two semi-cylindrical assemblies are connected.

[0020] Furthermore, the adjustment component comprises:

[0021] a push plate mounted in the notch;

[0022] A first connecting rod and a second connecting rod connected end to end by connecting rollers; the tail end of the first connecting rod is hinged to the push plate, and the head end of the second connecting rod is connected to the cutter head through a roller;

[0023] An adjustment gap is provided between the two semi-cylindrical assemblies, i.e., a support gap of a plurality of the connecting columns;

[0024] An arc-shaped slide groove is arranged on the cutter head;

[0025] A cutter head connecting column is mounted on the telescopic rotating body, and the cutter head connecting column is slidably arranged in the arc-shaped sliding groove;

[0026] The first connecting rod and the second connecting rod are both arranged in the adjustment gap; the cutting surface of the cutter head is consistent with the extension surface of the adjustment gap, and the thickness of the cutter head is smaller than the width of the adjustment gap.

[0027] Furthermore, in a natural state, the telescopic rotating body is in a retracted state, and the cutter head connecting column, the first connecting rod, and the second connecting rod are all located on the same straight line;

[0028] When the telescopic rotating body is in an extended state, the cutting angle adjustment range of the cutter head is 130°≤a≤155°.

[0029] Furthermore, it also includes a limiting groove provided on any of the semi-cylindrical assemblies, and the connecting roller slides in the limiting groove;

[0030] The limiting groove is an arc-shaped groove, and the limiting groove is consistent with the movement trajectory of the end of the second connecting rod.

[0031] Furthermore, the indicator light displays different colors according to the pressure data fed back by the pressure sensor;

[0032] When the pressure data of the pressure sensor is less than 10N, the indicator light displays green;

[0033] When the pressure data of the pressure sensor is 10N-30N, the indicator light is yellow;

[0034] When the pressure data of the pressure sensor is greater than 30N, the indicator light displays red.

[0035] As a second aspect, a method for using a knee joint meniscus anterior angle knife is characterized by comprising the following steps:

[0036] Step 1: In a natural state, the blade head is completely retracted into the handle;

[0037] Step 2: Tighten the tightening and adjusting assembly to fix the knob to the internal threaded body;

[0038] Step 3: The doctor holds the tail end of the handle and reaches into the arthroscope;

[0039] Step 4: Rotate the knob clockwise according to the set cutting angle to extend the cutter head and the telescopic rotating body until they rotate to the corresponding rotation angle;

[0040] Step 5: Cutting and real-time rotation angle adjustment; that is, cutting is performed according to cutting requirements, and the cutting angle is adjusted before cutting, or cutting is stopped during cutting according to the real-time force feedback of the cutting force feedback mechanism, and the cutting angle is adjusted;

[0041] Step 6: Complete cutting and proceed with recycling operations.

[0042] Specifically, the recycling operation in step six includes the following:

[0043] Loosen the set screw; use the elastic tension of the compression spring to quickly retract the cutter head into the handle;

[0044] The doctor pulls the handle out of the arthroscope.

[0045] The beneficial effects of the knee joint meniscus anterior angle knife and the use method of the present invention are:

[0046] The present invention installs an internal threaded part between the knob and the telescopic rotating body, and an external thread is arranged on the outer side of the telescopic rotating body to rotate with the internal thread on the internal threaded part. The internal threaded part and the knob are first fastened by a tightening and regulating component, so that the internal threaded part rotates with the knob. The telescopic rotating body can be telescoped by the doctor turning the knob, and the extension of the telescopic rotating body drives the rotation of the knife head to draw the knife out. When in use, the doctor only needs to control the speed of the rotating knob to control the knife drawing speed, and control the angle of the rotating knob to control the knife drawing length and the cutting angle of the knife head. This solves the problems of easy miscutting, chipping and inaccurate cutting angle adjustment caused by the traditional straight-out knife drawing method in the prior art. The knife drawing method of the present invention cleverly converts the linear motion of the knife head into the knob rotation angle, can accurately control the knife drawing speed, blade length and cutting angle of the knife head, and uses the elasticity of the compression spring itself to perform the knife retracting action, thereby achieving rapid knife retracting and saving operation time.

[0047] The present invention arranges the telescopic rotating body as two semi-cylindrical assemblies connected by a plurality of connecting columns, with an adjustment gap arranged in the middle, and arranges the first connecting rod and the second connecting rod that drive the cutter head to cut in the adjustment gap to avoid interference of the telescopic rotating body with the rotation of the connecting rod. At the same time, a guide assembly is arranged at the tail end of the second connecting rod to limit the movement of the second connecting rod. In order to ensure that the cutting angle of the cutter head does not deflect under the action of cutting resistance when cutting, the present invention utilizes the matching mode of internal and external threads to achieve the stability of the cutting angle of the cutter head through the self-locking function between the two.

[0048] Furthermore, the present invention is provided with an indicator light, the color of which is set according to the force applied to the blade, and the mechanical feedback of the front blade is achieved through the piezoelectric principle. The brightness and color of the LED light at the end are used to provide real-time prompts to the clinician, making it convenient for the clinician to control the amount of force applied during cutting and achieve precise cutting of the anterior horn of the meniscus. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] Figure 1 It is a cross-sectional view of the anterior angle knife of the knee joint meniscus in the first embodiment of the present invention when it is in an extended state.

[0051] Figure 2 It is a cross-sectional view of the anterior angle knife of the knee joint meniscus in the first embodiment of the present invention when it is in a contracted state.

[0052] Figure 3 yes Figure 2 Detail of the tail in the figure.

[0053] Figure 4 It is a partial structural schematic diagram of the telescopic rotating body of the first embodiment of the present invention.

[0054] Figure 5 It is a cross-sectional view of the telescopic rotating body of the first embodiment of the present invention.

[0055] Figure 6 It is a schematic diagram of the structure of the limit assembly of the first embodiment of the present invention.

[0056] Figure 7 It is a flowchart of the steps of the method of using the second embodiment of the present invention.

[0057] In the figure: 1. rotating base, 2. knob, 3. telescopic rotating body, 31. semi-cylindrical assembly, 32. connecting column, 33. notch, 34. external thread, 4. compression spring, 5. cutter head, 6. adjustment component, 61. push plate, 62. first connecting rod, 63. second connecting rod, 64. adjustment gap, 65. arc-shaped slide groove, 66. cutter head connecting column, 67. connecting roller, 7. handle, 8. zeroing boss, 9. limit groove, 10. cutting force feedback mechanism, 101. pressure sensor, 102. battery, 103. indicator light, 20. fastening and regulating component, 201. fixing hole, 202. fixing screw, 30. internal threaded part. DETAILED DESCRIPTION

[0058] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0059] Embodiment 1

[0060] like Figure 1-Figure 6 The specific embodiment of a knee meniscus anterior angle knife of the present invention shown in the figure comprises a rotating base 1 with a cavity in the middle, a knob 2 fixedly arranged at the front end of the rotating base 1, a telescopic rotating body 3 sleeved in the rotating base 1, an internal threaded part 30 arranged between the telescopic rotating body 3 and the knob 2, a cutting force feedback mechanism 10, a cutter head 5 connected to the telescopic rotating body 3 through an adjustment component 6, and a compression spring 4, wherein the telescopic rotating body 3 is provided with an external thread 34 cooperating with the internal threaded part 30, and the internal threaded part 30 and the knob 2 are fastened / separated by a fastening and regulating component 20, and the blade extension length of the cutter head 5 and the cutting angle of the cutter head 5 are synchronously adjusted in a positive proportional relationship, and the longer the blade extension length of the cutter head 5, the larger the corresponding cutting angle of the cutter head 5 relative to the extension axis of the telescopic rotating body 3.

[0061] The cutting force feedback mechanism 10 in this embodiment includes a pressure sensor 101 installed at the rear end of the adjusting component 6, a battery 102 installed on the rear wall of the rotating base 1, and an indicator light 103 arranged at the end of the rotating base 1. During installation, one end of the compression spring 4 abuts against the battery 102, and the other end thereof abuts against the pressure sensor 101. Here, the compression spring 4 provides a retraction force for the adjusting component 6 on the one hand, and on the other hand, the compression spring 4 also has a wire function, connecting the battery 102 and supplying power to the pressure sensor 101.

[0062] First, the internal threaded part 30 is fastened to the knob 2 by tightening the regulating component 20, so that the internal threaded part 30 rotates with the knob 2. When in use, it is only necessary to rotate the knob 2. According to the rotation angle of the knob 2, it is possible to achieve precise control of the knife length and the cutting inclination angle. Specifically, in the first embodiment, an external thread 34 is provided on the outer side of the telescopic rotating body 3 to rotate with the internal thread on the internal threaded part 30. The telescopic action of the telescopic rotating body 3 is achieved by the doctor turning the knob 2. The extension of the telescopic rotating body 3 drives the knife head 5 to rotate and produce the knife. When in use, the doctor only needs to control the rotation. The speed of the knob 2 can control the knife-out speed, and controlling the angle of the rotating knob 2 can control the knife-out length and the cutting angle of the knife head 5, which solves the problems of easy miscutting, broken blades and inaccurate cutting angle adjustment caused by the traditional straight-out knife-out method in the prior art. The knife-out method of the present invention utilizes the ingenious conversion of rotation angle and linear movement to accurately control the knife-out speed, blade length and cutting angle of the knife head 5, and utilizes the elasticity of the compression spring 4 itself and the independent design of the internal threaded part 30 and the knob 2 to perform the knife-retracting action, so that the knife-retracting speed is faster and the operation time is saved.

[0063] In this embodiment, a handle 7 is provided on the outer side of the telescopic rotating body 3. On the one hand, the handle 7 is used for the doctor to grasp and facilitate the picking up of the tool. On the other hand, when the telescopic rotating body 3 is in a fully contracted state, the blade head 5 is completely retracted into the handle 7. During the process of entering and exiting the arthroscopy, the blade head 5 is in a cylindrical handle 7, so it will not damage the surrounding tissues.

[0064] In order to facilitate the doctor to accurately control the blade extension length and tilt angle of the blade head 5, an angle scale is provided at the end of the handle 7 near the knob 2, and a zeroing boss 8 is provided on the knob 2. When the telescopic rotating body 3 is in a fully retracted state, the blade head 5 is completely retracted into the handle 7, and the zeroing boss 8 on the knob 2 is aligned with the 0 scale on the handle 7 to ensure the consistency of the initial rotation position of the knob 2. The tightening and regulating component 20 in this embodiment includes a fixing hole 201 provided on the knob 2 and a fixing screw 202 matched with the fixing hole 201. When the fixing screw 202 is screwed into the fixing hole 201, the knob 2 and the internal threaded member 30 are fixed, and the rotating knob 2 allows the telescopic rotating body 3 to move on the internal threaded member 30. When the blade 5 is extended to the set length, the self-locking function of the internal thread and the external thread 34 on the internal threaded part 30 is used to maintain the extended length and cutting angle of the blade. During the cutting process, the doctor does not need to control the knob 2 all the time, which will not distract the doctor's attention. When the cutting is completed, it is only necessary to loosen the set screw 202, and under the tension of the compression spring 4, the blade 5 can be quickly retracted into the handle 7.

[0065] like Figure 5 As shown, the telescopic rotating body 3 in the first embodiment includes two semi-cylindrical assemblies 31, a plurality of connecting columns 32 arranged between the two semi-cylindrical assemblies 31, and a notch 33 opened at the rear ends of the two semi-cylindrical assemblies 31, and the connecting columns 32 are arranged on the edge where the two semi-cylindrical assemblies 31 are connected.

[0066] It is further explained that if Figures 1 to 4 As shown, the adjustment assembly 6 in this embodiment includes a push plate 61 installed in the notch 33, a first connecting rod 62 and a second connecting rod 63 connected end to end by connecting rollers 67, an adjustment gap 64, an arc-shaped slide groove 65, a cutter head 5 and a connecting column 32, wherein the tail end of the first connecting rod 62 is connected to the push plate 61 for rotation, the head end of the second connecting rod 63 is connected to the cutter head 5 by a roller, the adjustment gap 64 is set between the two semi-cylindrical assemblies 31, that is, the support gap of a plurality of connecting columns 32, the arc-shaped slide groove 65 is set on the cutter head 5, the cutter head connecting column 66 is installed on the telescopic rotating body 3, and the cutter head connecting column 66 is slidably set in the arc-shaped slide groove 65. During installation, the first connecting rod 62 and the second connecting rod 63 are both set in the adjustment gap 64, the cutting surface of the cutter head 5 is consistent with the extension surface of the adjustment gap 64, and the thickness of the cutter head 5 is smaller than the width of the adjustment gap 64.

[0067] like Figure 6 As shown, the knee joint meniscus anterior angle knife in this embodiment also includes a limiting groove 9 provided on any half-cylindrical assembly 31, and the connecting roller 67 slides in the limiting groove 9. The limiting groove 9 is an arc groove, and the limiting groove 9 is consistent with the motion trajectory of the end of the second connecting rod 63. In this embodiment, the connecting roller 67 connecting the first connecting rod 62 and the second connecting rod 63 is limited to slide in the limiting groove 9 to prevent the first connecting rod 62 and the second connecting rod 63 from rotating excessively, that is, to prevent the cutter head 5 from rotating excessively.

[0068] When the telescopic rotating body 3 is in a fully retracted state, the cutter head connecting column 66, the first connecting rod 62, and the second connecting rod 63 are all located on the same straight line. When the telescopic rotating body 3 is in a fully extended state, the cutting angle adjustment range of the cutter head 5 is 130°≤a≤155°, see Figure 2 When the knob 2 is turned to extend the cutter head 5, the compression spring 4 provided at the tail of the telescopic rotating body 3 is stretched, so that the telescopic rotating body 3 maintains a tightly fitted state and the force is evenly distributed. After the set screw 202 is screwed into the set hole 201 on the knob 2, the telescopic rotating body 3 and the knob 2 are fixed to each other, that is, the internal threaded member 30 rotates with the knob 2, and the telescopic rotating body 3 and the internal threaded member 30 are self-locked in position through the internal and external threads. At this time, even if the telescopic rotating body 3 is subjected to external force, there will be no axial shaking, ensuring the stability of the extended position of the telescopic rotating body 3. The cutter head 5, the first connecting rod 62, and the second connecting rod 63 all slide in the adjustment gap 64, and under the limiting effect of the limiting groove 9 on the first connecting rod 62, it is ensured that the cutter head 5 and the connecting rod will not shake radially, thereby making the knee joint meniscus anterior angle cutter of this embodiment have higher reliability and stability than the prior art.

[0069] like Figure 3 As shown, the cutting force feedback mechanism 10 in the anterior angle knife of the knee meniscus in this embodiment includes a pressure sensor 101 installed between the push plate 61 and the compression spring 4, a battery 102 installed inside the rotating base 1, and an indicator light 103 arranged at the end of the rotating base 1. Specifically, the indicator light 103 displays different colors according to the pressure data fed back by the pressure sensor 101. When the pressure data of the pressure sensor 101 is less than 10N, the indicator light 103 displays green, and the magnitude of the force is within the force range for cutting soft tissue. When the pressure data of the pressure sensor 101 is 10-30N, the indicator light 103 displays yellow, and the magnitude of the force is within the force range for cutting fascia, ligament, and cartilage. When the pressure data of the pressure sensor 101 is greater than 30N, the indicator light 103 displays red, and the magnitude of the force is within the force range for cutting hard bone.

[0070] In this embodiment, a notch 33 is provided at the tail of the semi-cylindrical assembly 31, which can be used to install the push plate 61, and a pressure sensor 101 is installed between the push plate 61 and the compression spring 4, and a battery 102 is arranged between the compression spring 4 and the indicator light 103. The battery 102 in this embodiment adopts a button battery 102, which is used to power the pressure sensor 101 and the indicator light 103. Different colors of the indicator light 103 are used to indicate the magnitude of different force values, and a three-level feedback control is adopted, specifically, green is displayed when it is less than 10N, yellow is displayed when it is 10-30N, and red is displayed when it is greater than 30N. In this embodiment, the indicator light 103 provides refined force feedback to the cutter head 5, allowing the doctor to timely judge the force magnitude of the cutter head 5 and the type of human tissue being cut, thereby realizing refined operation.

[0071] Embodiment 2

[0072] like Figure 7 As shown, the second embodiment is based on the method for using the above-mentioned knee joint meniscus anterior angle knife, and includes the following steps:

[0073] Step 1: In a natural state, the blade head 5 is completely retracted into the handle 7;

[0074] Step 2: Screw and tighten the regulating assembly 20 to fix the knob 2 and the internal thread body 30;

[0075] Step 3: The doctor holds the rear end of the handle 7 and inserts it into the arthroscope;

[0076] Step 4: Rotate the knob 2 clockwise according to the set cutting angle to rotate and extend the cutter head 5 and the telescopic rotating body 3 until they rotate to the corresponding rotation angle;

[0077] Step 5: Cutting and real-time rotation angle adjustment; that is, cutting according to cutting requirements, adjusting the cutting angle before cutting, or stopping cutting during cutting according to the real-time force feedback of the cutting force feedback mechanism, and adjusting the cutting angle. ;

[0078] Step 6: Complete cutting and proceed with recycling operations.

[0079] Specifically, in the natural state, the set screw 202 is loosened to completely retract the blade head 5 into the handle 7, and in step 2, the set screw 202 is screwed to fix the knob 2 and the internal thread body 30. The recovery operation in step 6 includes the following contents: first, the set screw 202 is loosened, and the blade head 5 is completely retracted into the handle 7 by the elastic tension of the compression spring 4, and then the doctor holds the handle 7 and pulls it out of the arthroscope.

[0080] It should be understood that, in the early stage of use, it is necessary to construct a mapping relationship between the rotation angle of knob 2 and the cutting angle of blade head 5. For example, when knob 2 is rotated 5 degrees, the corresponding cutting angle of blade head 5 increases or decreases by 1 degree. During use, the doctor can refer to the mapping relationship between the rotation angle of knob 2 and the cutting angle of blade head 5 to achieve the accuracy of adjusting the cutting angle of blade head 5. That is, the cutting angle of blade head 5 is first matched according to the extended length of the blade of blade head 5, and then the extended length of the blade and the rotation angle of knob 2 are mapped, so as to prepare for the doctor to accurately adjust the rotation angle of knob 2.

[0081] It should be further explained that the length of the blade of the cutter head 5 and the cutting angle are in direct proportion, and the mapping equation is related to the length of the first connecting rod 62 and the length of the second connecting rod 63. The mapping equations are different for different lengths of the first connecting rod 62 and the second connecting rod 63, which will not be described in detail here. The rotation angle is in direct proportion to the length of the blade of the cutter head 5. Those skilled in the art can deduce the mapping relationship between the rotation angle of the knob 2 and the cutting angle of the cutter head 5 based on actual parameters, which will not be described in detail here.

[0082] The specific method of using this embodiment is as follows: in the natural state, that is, in the fully retracted state, tighten the set screw 202 to fix the internal threaded part 30 and the knob 2. The doctor holds the tail of the front angle knife and inserts it into the arthroscope until it is inserted into the appropriate position. The knob 2 is rotated clockwise to screw the telescopic rotating body 3 out of the handle 7. The telescopic rotating body 3 pushes the first connecting rod 62 to move forward, and pushes the second connecting rod 63 to rotate relative to the telescopic rotating body 3 through the connecting roller 67. At this time, the connecting roller 67 slides in the limiting groove 9, and the head end of the second connecting rod 63 is connected to the cutter head 5 through the roller, that is, the rotation of the second connecting rod 63 drives the cutter head 5 to move forward in the sliding groove 17, completing the action of the cutter head 5 rotating and cutting. When the knife is out, pay attention to the color change of the LED indicator 103. When the knife head 5 collides with different tissues of the human body, pressure is applied to the pressure sensor 101 through the first connecting rod 62 and the second connecting rod 63. The pressure sensor 101 converts the pressure into an electrical signal and transmits it to the LED indicator 103 through the signal line, thereby completing the mechanical feedback of the front angle knife.

[0083] According to the different colors displayed by the brightness of the LED indicator 103, the force applied to the cutter head 5 is sensed. At the same time, according to the morphology of the tissue to be cut, the knob 2 is rotated to adjust the blade length and blade inclination angle of the cutter head 5, thereby realizing a variety of cutting methods. After the cutting is completed, the set screw 202 is loosened, so that the internal threaded member 30 and the knob 2 are separated, and the compression spring 4 automatically retracts, driving the telescopic rotating body 3 to drive the first connecting rod 62, the second connecting rod 63, and the cutter head 5 in turn, realizing a rapid knife retracting action.

[0084] It should be further explained here that, as another embodiment, the knife retracting action can also be achieved by reversely rotating the knob 2. The blade extension length and blade angle (i.e., the inclination angle of the blade 5) of the knife head 5 of the present invention are jointly controlled, which simplifies the doctor's operation steps, facilitates the doctor's surgical operation, and reduces the operation time.

[0085] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A knee joint meniscus anterior angle knife, characterized in that: include: A rotating base with a cavity in the middle; A knob fixedly arranged at the front end of the rotating base; A telescopic rotating body is sleeved in the rotating base, and the front end of the telescopic rotating body extends out of the rotating base; A cutter head connected to the telescopic rotating body through an adjustment assembly; A cutting force feedback mechanism, the cutting force feedback mechanism comprising a pressure sensor installed at the rear end of the adjustment assembly, a battery installed on the rear wall of the rotating base, and an indicator light arranged at the end of the rotating base; A compression spring, one end of which abuts against the battery, and the other end of which abuts against the pressure sensor; Among them, an internal threaded part is arranged between the telescopic rotating body and the knob; an external thread matching with the internal threaded part is arranged on the telescopic rotating body; the internal threaded part and the knob are fastened / separated by a fastening and regulating component.

2. A knee joint meniscus anterior angle knife according to claim 1, characterized in that: The blade extension length of the cutter head and the cutting angle of the cutter head are synchronously adjusted in direct proportion, that is, the longer the blade extension length of the cutter head relative to the telescopic rotating body, the greater the cutting angle of the cutter head on the anterior horn of the human meniscus.

3. The knee joint meniscus anterior angle knife according to claim 1, characterized in that: A handle is sleeved on the outer side of the telescopic rotating body; an angle scale is provided on the end of the handle close to the knob, and a zero return boss is provided on the knob; In a natural state, the telescopic rotating body is in a retracted state, the blade head is completely retracted into the handle, and the zero return boss on the knob is aligned with the 0 scale on the handle.

4. The knee joint meniscus anterior angle knife according to claim 3, characterized in that: The tightening and adjusting assembly comprises a tightening hole provided on the knob and a tightening screw matched with the tightening hole.

5. The knee joint meniscus anterior angle knife according to claim 4, characterized in that: The telescopic rotating body comprises two semi-cylindrical assemblies, a plurality of connecting columns arranged between the two semi-cylindrical assemblies, and notches opened at the rear ends of the two semi-cylindrical assemblies; The connecting column is arranged on the edge where the two semi-cylindrical assemblies are connected.

6. A knee joint meniscus anterior angle knife according to claim 5, characterized in that: The adjustment component comprises: a push plate mounted in the notch; A first connecting rod and a second connecting rod connected end to end by connecting rollers; the tail end of the first connecting rod is hinged to the push plate, and the head end of the second connecting rod is connected to the cutter head through a roller; An adjustment gap is provided between the two semi-cylindrical assemblies, i.e., a support gap of a plurality of the connecting columns; An arc-shaped slide groove is arranged on the cutter head; A cutter head connecting column is mounted on the telescopic rotating body, and the cutter head connecting column is slidably arranged in the arc-shaped sliding groove; The first connecting rod and the second connecting rod are both arranged in the adjustment gap; the cutting surface of the cutter head is consistent with the extension surface of the adjustment gap, and the thickness of the cutter head is smaller than the width of the adjustment gap.

7. The knee joint meniscus anterior angle knife according to claim 6, characterized in that: In a natural state, the telescopic rotating body is in a retracted state, and the cutter head connecting column, the first connecting rod, and the second connecting rod are all located on the same straight line; When the telescopic rotating body is in an extended state, the cutting angle adjustment range of the cutter head is 130°≤a≤155°.

8. The knee joint meniscus anterior angle knife according to claim 6, characterized in that: It also includes a limiting groove provided on any of the semi-cylindrical assemblies, and the connecting roller slides in the limiting groove; The limiting groove is an arc-shaped groove, and the limiting groove is consistent with the movement trajectory of the end of the second connecting rod.

9. The knee joint meniscus anterior angle knife according to claim 1, characterized in that: The indicator light displays different colors according to the pressure data fed back by the pressure sensor; When the pressure data of the pressure sensor is less than 10N, the indicator light displays green; When the pressure data of the pressure sensor is 10N-30N, the indicator light is yellow; When the pressure data of the pressure sensor is greater than 30N, the indicator light displays red.

10. A method for using a knee joint meniscus anterior angle knife according to any one of claims 4 to 9, characterized in that: The following steps are involved: Step 1: In a natural state, the blade head is completely retracted into the handle; Step 2: Tighten the tightening and adjusting assembly to fix the knob to the internal threaded body; Step 3: The doctor holds the tail end of the handle and inserts it into the arthroscope; Step 4: Rotate the knob clockwise according to the set cutting angle to extend the cutter head and the telescopic rotating body until they rotate to the corresponding rotation angle; Step 5: Cutting and real-time rotation angle adjustment; that is, cutting is performed according to cutting requirements, and the cutting angle is adjusted before cutting, or cutting is stopped during cutting according to the real-time force feedback of the cutting force feedback mechanism, and the cutting angle is adjusted; Step 6: Complete cutting and proceed with recycling operations.

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