Arthroscopic joint gap enlarging device for treating meniscus tearing

Abstract

The invention discloses an arthroscopic joint gap enlarging device for treating meniscus tearing, which relates to the technical field of medical instruments and comprises a control part, a distraction part and an adjusting part, the distraction part enters through a minimally invasive channel, an arthroscope is used for assisting observation, the position of the rear frame provided with the middle shaft is located at an opening of the skin, the distraction part is opened through the control part, and when distraction is completed, the position of the middle shaft of the rear frame cannot damage the minimally invasive opening of the skin; in the distraction process, the telescopic assembly is controlled through the control part to adjust the distraction part on the inner side of the skin according to the weight of the patient, the depth of tissue and the size and position of the joint, so that the individual difference of different patients can be met without moving the relative position relation between the middle axis position of the rear frame and the skin.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an arthroscopic joint space enlarging device for treating meniscus tears. Background Art

[0002] The meniscus is a bone with an inner and outer half-moon shape on the tibial articular surface. The edge is thicker and closely connected to the joint capsule, while the center is thin and free. The meniscus is composed of fibrocartilage, with one inside and one outside, located in the joint space of the knee joint. The anterior part of the inner and outer menisci is connected to the transverse ligament of the knee. The structure of the meniscus is semi-circular, with a thicker periphery and a thin and sharp inner edge. The upper side is concave and adapted to the femoral condyle, and the lower side is flat and adapted to the tibial plateau. The meniscus is mainly attached to the tibia, but can move within a certain range with the femur. In addition, its morphological characteristics can compensate for the incompatibility between the tibial condyle and the femoral condyle, increase the stability of the joint, and prevent the surrounding soft tissue from being squeezed into the joint. The meniscus is tough and has a certain elasticity, which can buffer the impact of the two bone surfaces, absorb shock, spread synovial fluid, increase lubrication, reduce friction, and protect the joint.

[0003] The rotational shear force exerted on the meniscus between the femur and tibia, such as the sudden inward or external rotation of the thigh when the knee is flexed, such as acute knee sprain, will cause a meniscus tear; therefore, in the case of an anterior cruciate ligament tear or rupture, 60% of anterior cruciate ligament patients also have a tear of the posterior horn of the meniscus; improper exercise posture (knee valgus during squats), long-term improper cross-legged sitting posture, chronic strain of the knee joint caused by aging, and congenital developmental abnormalities of the meniscus can also cause meniscus injury; meniscus injury is divided into three levels in medical imaging: I° and II° are generally early degenerative changes caused by vascular shadows inside the meniscus or meniscus degeneration, which do not constitute meniscus injury and only require conservative treatment; III° represents a meniscus injury, that is, a tear, and arthroscopic surgery is recommended; after adulthood, only part of the meniscus has blood vessels to supply blood, and blood vessels are the main channel for nutrient supply. According to the blood supply and healing ability, the meniscus is divided into the red zone, red-white zone, and white zone; the red zone: 1-3 mm close to the joint capsule, has rich blood supply, and can heal on its own; the red-white zone: the middle area of ​​3-5 mm inside the joint, has some red zone capillary terminals derived from it, and the possibility of self-healing is lower; the white zone: inside the joint, has no blood vessels, and has no self-healing ability.

[0004] The surgeon needs to suture, repair, resect or replace the meniscus at the knee. 2-3 incisions of approximately 1 cm are made around the knee. Sterile saline is pumped into the knee joint through one incision to enlarge the incision and flush the blood in the area, clearly showing the internal structure of the knee joint. An arthroscope is inserted into another incision. The camera at the end of the arthroscope transmits the image inside the knee joint to the monitor in the operating room in real time.

[0005] In summary, the current treatment of meniscus has the following technical problems: the meniscus is located in the joint space, and the space in the joint space is limited. After the arthroscopy enters the joint space, other surgical instruments need to be introduced. During the current operation, an assistant pulls the thigh and calf to expand the joint space, but the operation time is long and the human control is unstable, which affects the surgical space and surgical field of the joint space. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention provides an arthroscopic joint space enlarging device for treating meniscus tears.

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0008] An arthroscopic joint space enlargement device for treating meniscus tears comprises a control part, a spreading part and an adjusting part, wherein the control part, the spreading part and the adjusting part are provided in two groups, a rear frame is provided between the control part and the spreading part in one group, and a central axis is rotatably connected between the two groups of rear frames;

[0009] The control part includes a bending component, the spreading part includes a telescopic component and a rotating component, and the adjusting part includes a regulating component for controlling the telescopic component and the rotating component; the regulating component is located on the proximal side of the middle axis on the rear frame.

[0010] Further, the rotating assembly includes a plurality of middle frames, the middle frames are arranged in sequence, and a rotating shaft is rotatably connected in the middle of the middle frames; the telescopic assembly includes a side frame, and a connecting plate is fixedly connected between the side frame and the rotating shaft on the distal side;

[0011] The side frame is slidably connected to the middle frame on the proximal side, a step groove is provided on the middle frame, a step block is fixedly connected to the side of the side frame away from the rotating shaft, the step block is slidably connected in the step groove, and a tension spring is fixedly connected between the step block and the middle frame.

[0012] Furthermore, the side frame at the farthest end is provided with a front frame at the far end side, and the front frame is rotatably connected to the rotating shaft of the side frame at the farthest end;

[0013] The front frame is fixedly connected to the push frame at the distal end;

[0014] The middle frame at the nearest end is provided with a rear frame at the near end side, the rear frame is fixedly connected with a connecting plate and a rotating shaft, and the middle frame at the nearest end is rotatably connected to the rotating shaft.

[0015] Further, the regulating component includes a pull wire and a rotating drum, a conical groove is opened on the proximal side of the middle frame, and a wire groove is opened on the distal side of the middle frame; a wire groove is opened on the side frame, and a conical groove is opened on the proximal side of the front frame; the conical groove is located on both sides of the rotating shaft of the corresponding component, and the wire groove is located on both sides of the rotating shaft of the corresponding component, and the wire groove corresponds to the conical groove;

[0016] A pull wire is fixedly connected in the conical groove of the front frame, and the pull wire is slidably connected to the wire groove and the conical groove; the pull wire is slidably connected to the rear frame and passes through the rear frame at the position of the regulating component;

[0017] The pull wire is fixedly connected to the rotating drum, and the pull wire is wound on the rotating drum, and the upper and lower groups of the pull wire are wound on the rotating drum in opposite directions; the rotating drum is rotatably connected to the rear frame, and the rear frame is rotatably connected to an inner rod at the axis position of the rotating drum, and a screw is fixedly connected to the inner rod, and an internal thread is provided in the middle of the rotating drum, and the internal thread is threadedly connected to the screw; an external thread is provided on the outer side of the rotating drum, and a threaded plate is threadedly connected to the external thread, and sliding frames are slidably connected to both sides of the threaded plate, and the sliding frame is fixedly connected to the rear frame.

[0018] Furthermore, the control part also includes a control rod, and the bending assembly includes a plurality of rotating frames, the far end of the rotating frame is fixedly connected with a T-block, the T-block is slidably connected with a C-block, the C-block is fixedly connected with a rotating seat, the rotating seat is fixedly connected with a side shaft, and the side shaft is rotatably connected to the rotating frame on the far end; the far end of the control rod is fixedly connected with a rotating seat and a side shaft, and the rotating frame at the nearest end is rotatably connected to the side shaft of the control rod; the farthest end side shaft is rotatably connected to the rear frame.

[0019] Furthermore, a ring handle is fixedly connected to the rotating drum, and a rotating handle is fixedly connected to one end of the screw rod close to the ring handle.

[0020] Furthermore, a control ring is fixedly connected to the proximal end of the control rod.

[0021] Furthermore, the rear frame on one side is slidably connected with an insertion rod, and the rear frame on the other side is provided with a plurality of insertion holes around the central axis, and the insertion rod is slidably connected in one of the insertion holes.

[0022] Furthermore, the rotating shaft connected to the middle frame is parallel to the central axis of the rear frame, and the tapered grooves of the two groups of opening parts are inclined in opposite directions. The two groups of opening parts can be bent toward the middle to increase the contact surface with the bones.

[0023] Furthermore, the rotating shaft connected to the middle frame is perpendicular to the central axis of the rear frame, and the conical grooves of the two sets of support parts have the same inclination direction. Through the telescopic component cooperating with the rotating component, the support part can bend horizontally to cooperate with the arc-shaped meniscus structure.

[0024] Beneficial effects of the present invention:

[0025] An arthroscopic joint space enlargement device for treating meniscus tears, wherein the expansion part is inserted through a minimally invasive channel, and an arthroscopy is used for auxiliary observation, and the rear frame with a central axis is positioned at the opening of the skin, and the expansion part is opened by a control part. When the expansion is completed, the central axis position of the rear frame will not cause damage to the minimally invasive opening of the skin; during the expansion process, the expansion part on the inner side of the skin is adjusted by the control part to control the telescopic component according to the patient's fatness, tissue depth, and joint size and position, so that the relative position relationship between the central axis position of the rear frame and the skin is not moved, and the individual differences of different patients can also be met;

[0026] The pull wires on both sides of the expansion part are controlled by the rotating drum of the regulating component, so that the screw and the rotating drum rotate simultaneously, so that the pull wire on one side is tightened and the pull wire on the other side is loosened. With the cooperation of the conical groove and the rotating shaft, the expansion part is deflected. When the length of the expansion part needs to be changed, the rotating drum is kept from rotating by rotating the screw, so that the entire rotating drum is moved away from or close to the rear frame. The two pull wires are tightened and loosened at the same time by the rotating drum, and then the telescopic component changes the overall length of the expansion part in cooperation with the tension spring.

[0027] When the changes of the rotating component and the control part are in the same plane, due to the force of the femur and tibia on both sides of the joint seam, the relaxed tension wire acts on the proximal position of the distraction part and the bone, so that the distraction part and the joint surface are in surface contact, achieving a stable distraction effect;

[0028] When the rotation component and the control part are not in the same plane, the curved expansion part is close to the arc of the bones on both sides of the joint seam, so that the expansion part fits the femur and tibia on both sides of the joint seam, and the bending degree of the expansion parts of the two groups is adjusted separately to adapt to the corresponding arc edge structure of the bones;

[0029] After the expansion is completed, the control part is bent away from the minimally invasive opening of the skin by means of a bending component, so that the control part does not interfere with the operator's operation of other instruments;

[0030] After the expansion part is expanded to a suitable position, the insertion rod of the rear frame on one side is inserted into the insertion hole of the rear frame on the other side to complete the fixation of the instrument structure and maintain the expansion effect of the expansion part.

[0031] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of the overall structure of the arthroscopic joint space enlargement device for treating meniscus tears according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the structural connection between the rotating assembly and the telescopic assembly according to an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of the structure of the middle frame and the cable puller according to an embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the expansion portion according to an embodiment of the present invention;

[0037] Figure 5 It is a structural schematic diagram of the middle frame according to an embodiment of the present invention;

[0038] Figure 6 It is a structural schematic diagram of the side frame according to an embodiment of the present invention;

[0039] Figure 7 It is a schematic structural diagram of the middle frame, the rear frame and the adjustment part according to an embodiment of the present invention;

[0040] Figure 8 It is a structural schematic diagram of the pull wire, rear frame section and adjustment part according to the embodiment of the present invention;

[0041] Fig. 9 It is a schematic diagram of the structure of the pull wire and the rotating drum according to an embodiment of the present invention;

[0042] Fig.10 It is a schematic diagram of the structure of the rotating drum, the screw rod and the threaded plate according to an embodiment of the present invention;

[0043] Fig.11 It is a schematic diagram of the structure of the drum cross section and the screw rod according to an embodiment of the present invention;

[0044] Fig.12 It is a schematic diagram of the structure of the bending assembly according to an embodiment of the present invention;

[0045] Fig.13 This is a schematic diagram of the structure of the C-type block according to an embodiment of the present invention;

[0046] Fig.14 This is a schematic diagram of the working structure of the arthroscopic joint space enlarging device for treating meniscus tears according to an embodiment of the present invention;

[0047] Fig.15 It is a schematic structural diagram of the rear frame and the insertion rod according to an embodiment of the present invention;

[0048] Fig.16 It is a structural schematic diagram of the plug rod and the plug hole according to an embodiment of the present invention;

[0049] Fig.17 A schematic diagram of another connection relationship between the rotating shaft and the central shaft according to an embodiment of the present invention;

[0050] Fig.18 It is a schematic structural diagram of the adjustment part and the rear frame according to an embodiment of the present invention;

[0051] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0052] 1-control rod, 101-control ring, 102-swivel seat, 103-side shaft, 110-swivel frame, 111-T-block, 120-C-block, 210-front frame, 211-push frame, 212-cone groove, 213-pull wire, 220-middle frame, 221-wire groove, 222-step groove, 230-side frame, 231-swivel shaft, 232-connecting plate, 233-step block, 234-tension spring, 240-rear frame, 241-middle shaft, 250-insertion rod, 251-jack, 3-rotating cylinder, 301-ring handle, 302-external thread, 303-internal thread, 310-inner rod, 311-screw, 312-swivel handle, 320-threaded plate, 321-sliding frame. DETAILED DESCRIPTION

[0053] 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.

[0054] Example 1

[0055] like Figure 1-13 Shown

[0056] The arthroscopic joint space enlargement device for treating meniscus tears of the present invention comprises a control part, a spreading part and an adjusting part, wherein the control part, the spreading part and the adjusting part are provided in two groups, a rear frame (240) is provided between the control part and the spreading part in one group, and a central axis (241) is rotatably connected between the two groups of the rear frames (240); the control part comprises a bending assembly, the spreading part comprises a telescopic assembly and a rotating assembly, and the adjusting part comprises a regulating assembly for controlling the telescopic assembly and the rotating assembly; the regulating assembly is located on the proximal side of the central axis (241) on the rear frame (240);

[0057] The rotating assembly comprises a plurality of middle frames (220), the middle frames (220) are arranged in sequence, and a rotating shaft (231) is rotatably connected in the middle of the middle frames (220); the telescopic assembly comprises a side frame (230), and a connecting plate (232) is fixedly connected between the side frame (230) and the rotating shaft (231) on the distal side; the side frame (230) is slidably connected to the middle frame (220) on the proximal side, a step groove (222) is provided on the middle frame (220), a step block (233) is fixedly connected on the side of the side frame (230) away from the rotating shaft (231), the step block (233) is slidably connected in the step groove (222), and a tension spring (234) is fixedly connected between the step block (233) and the middle frame (220);

[0058] The side frame (230) at the farthest end is provided with a front frame (210) at the far end side, and the front frame (210) is rotatably connected to the rotating shaft (231) of the side frame (230) at the farthest end; the front frame (210) is fixedly connected to the push frame (211) at the far end side; the middle frame (220) at the nearest end is provided with a rear frame (240) at the near end side, and the rear frame (240) is fixedly connected to a connecting plate (232) and a rotating shaft (231), and the middle frame (220) at the nearest end is rotatably connected to the rotating shaft (231);

[0059] The regulating component comprises a pull wire (213) and a rotating drum (3); a conical groove (212) is formed on the proximal side of the middle frame (220), and a wire groove (221) is formed on the distal side of the middle frame (220); a wire groove (221) is formed on the side frame (230), and a conical groove (212) is formed on the proximal side of the front frame (210); the conical groove (212) is located on both sides of the corresponding component surrounding the rotating shaft (231), the wire groove (221) is located on both sides of the corresponding component surrounding the rotating shaft (231), and the wire groove (221) and the conical groove (212) are connected to each other. 212); a pull wire (213) is fixedly connected in the conical groove (212) of the front frame (210), and the pull wire (213) is slidably connected to the wire groove (221) and the conical groove (212); the pull wire (213) is slidably connected in the rear frame (240) and passes through the rear frame (240) at the position of the regulating component; the pull wire (213) is fixedly connected to the rotating drum (3), and the pull wire (213) is wound on the rotating drum (3), and the upper and lower groups of the pull wire (213) are wound on the rotating drum (3) in opposite directions; The rotating drum (3) is rotatably connected to the rear frame (240); the rear frame (240) is rotatably connected to an inner rod (310) at the axis position of the rotating drum (3); a screw rod (311) is fixedly connected to the inner rod (310); an internal thread (303) is provided in the middle of the rotating drum (3); the internal thread (303) is threadedly connected to the screw rod (311); an external thread (302) is provided on the outer side of the rotating drum (3); a threaded plate (320) is threadedly connected to the external thread (302); and both sides of the threaded plate (320) are slidably connected to the rotating drum (3). A sliding frame (321) is connected, and the sliding frame (321) is fixedly connected to the rear frame (240); the pull wires on both sides of the expansion part are controlled by the rotating drum of the regulating component, so that the screw rod and the rotating drum rotate simultaneously, so that the pull wire on one side is tightened and the pull wire on the other side is loosened, and the expansion part is deflected under the cooperation of the conical groove and the rotating shaft. When the length of the expansion part needs to be changed, the rotating drum is kept from rotating by rotating the screw rod, so that the rotating drum as a whole is moved away from or close to the rear frame, and the two pull wires are simultaneously controlled to be tightened and loosened by the rotating drum, and then the telescopic component changes the overall length of the expansion part in cooperation with the tension spring;

[0060] Example 2

[0061] like Figure 12-14 Shown

[0062] The control part also includes a control rod (1), and the bending assembly includes a plurality of rotating racks (110). The rotating rack (110) is fixedly connected to a T-shaped block (111) at the distal end, and a C-shaped block (120) is slidably connected to the T-shaped block (111). The C-shaped block (120) is fixedly connected to a rotating seat (102), and a side shaft (103) is fixedly connected to the rotating seat (102). The side shaft (103) is rotatably connected to the rotating rack (110) at the distal end; the rotating rack (110) is fixedly connected to the rotating seat (102) and the side shaft (103) at the most proximal end, and the rotating rack (110) is rotatably connected to the side shaft (103) of the control rod (1); the side shaft (103) at the most distal end is rotatably connected to the rear rack (240); after the opening is completed, the control part is bent to a side away from the minimally invasive opening of the skin through the bending assembly, so that the control part does not interfere with the operator's operation of other instruments;

[0063] The rotating drum (3) is fixedly connected with a ring handle (301), and the screw rod (311) is fixedly connected with a rotating handle (312) at one end close to the ring handle (301);

[0064] The proximal end of the control rod (1) is fixedly connected with a control ring (101);

[0065] Example 3

[0066] like Figure 15-16 Shown

[0067] The rear frame (240) on one side is slidably connected with an insertion rod (250), and the rear frame (240) on the other side is provided with a plurality of insertion holes (251) around the central axis (241), and the insertion rod (250) is slidably connected in one of the insertion holes (251); after the expansion part is expanded to a suitable position, the insertion rod of the rear frame on one side is inserted into the insertion hole of the rear frame on the other side to complete the fixing of the device structure and maintain the expansion effect of the expansion part;

[0068] Example 4

[0069] like Figure 1 , 14 Shown

[0070] The axis of the rotating shaft (231) connected to the middle frame (220) is parallel to the axis of the middle axis (241) connected to the rear frame (240), and the conical grooves (212) of the two groups of spreading parts are inclined in opposite directions, so that the two groups of spreading parts can be bent in the middle to increase the contact surface with the bone; when the rotation component and the control part change in the same plane, due to the force of the femur and tibia on both sides of the joint seam, the relaxed tension wire acts on the proximal position of the spreading part and the bone, so that the spreading part and the joint surface are in surface contact, thereby achieving a stable spreading effect;

[0071] Example 5

[0072] like Fig.17 , 18 Shown

[0073] The rotating shaft (231) connected to the middle frame (220) is perpendicular to the axis of the middle axis (241) connected to the rear frame (240), and the expansion part can be bent horizontally by cooperating with the rotating component through the telescopic component to match the arc-shaped meniscus structure; when the changes of the rotating component and the control part are not in the same plane, the curved expansion part is close to the arc of the bones on both sides of the joint seam, so that the expansion part fits the femur and tibia on both sides of the joint seam, and the bending degree of the expansion parts of the two groups is adjusted separately to adapt to the corresponding arc-shaped edge structure of the bones.

[0074] In summary, the present invention is an arthroscopic joint space enlarging device for treating meniscus tears, in which the expansion part is inserted through a minimally invasive channel, and arthroscopy is used to assist in observation, and the rear frame with a central axis is positioned at the opening of the skin, and the expansion part is opened by a control part. When the expansion is completed, the central axis position of the rear frame will not cause damage to the minimally invasive opening of the skin; during the expansion process, the expansion part on the inner side of the skin is adjusted by the control part to control the telescopic component according to the patient's weight, tissue depth, and size and position of the joint, so that the relative position relationship between the central axis position of the rear frame and the skin is not moved, which can also meet the individual differences of different patients.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", 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 invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An arthroscopic joint space enlargement device for treating meniscus tears, characterized in that: It includes a control part, an opening part and an adjusting part, wherein the control part, the opening part and the adjusting part are provided in two groups, a rear frame is provided between the control part and the opening part in one group, and a central axis is rotatably connected between the two groups of rear frames; The control part includes a bending component, the spreading part includes a telescopic component and a rotating component, and the adjusting part includes a regulating component for controlling the telescopic component and the rotating component; the regulating component is located on the proximal side of the middle axis on the rear frame.

2. The arthroscopic joint space enlargement device for treating meniscus tears according to claim 1, characterized in that: The rotating assembly includes a plurality of middle frames, which are arranged in sequence, and a rotating shaft is rotatably connected in the middle of the middle frames; the telescopic assembly includes a side frame, and a connecting plate is fixedly connected between the side frame and the rotating shaft at the distal end; The side frame is slidably connected to the middle frame on the proximal side, a step groove is provided on the middle frame, a step block is fixedly connected to the side of the side frame away from the rotating shaft, the step block is slidably connected in the step groove, and a tension spring is fixedly connected between the step block and the middle frame.

3. The arthroscopic joint space enlargement device for treating meniscus tear according to claim 2, characterized in that: The farthest side frame is provided with a front frame at the far end side, and the front frame is rotatably connected to the rotating shaft of the farthest side frame; The front frame is fixedly connected to the push frame at the distal end; The middle frame at the nearest end is provided with a rear frame at the near end side, the rear frame is fixedly connected with a connecting plate and a rotating shaft, and the middle frame at the nearest end is rotatably connected to the rotating shaft.

4. The arthroscopic joint space enlargement device for treating meniscus tear according to claim 3, characterized in that: The regulating component includes a pull wire and a rotating drum, a conical groove is opened on the proximal side of the middle frame, and a wire groove is opened on the distal side of the middle frame; a wire groove is opened on the side frame, and a conical groove is opened on the proximal side of the front frame; the conical groove is located on both sides of the corresponding component surrounding the rotating shaft, and the wire groove is located on both sides of the corresponding component surrounding the rotating shaft, and the wire groove corresponds to the conical groove; A pull wire is fixedly connected in the conical groove of the front frame, and the pull wire is slidably connected to the wire groove and the conical groove; the pull wire is slidably connected to the rear frame and passes through the rear frame at the position of the regulating component; The pull wire is fixedly connected to the rotating drum, and the pull wire is wound on the rotating drum, and the upper and lower groups of the pull wire are wound on the rotating drum in opposite directions; the rotating drum is rotatably connected to the rear frame, and the rear frame is rotatably connected to an inner rod at the axis position of the rotating drum, and a screw is fixedly connected to the inner rod, and an internal thread is provided in the middle of the rotating drum, and the internal thread is threadedly connected to the screw; an external thread is provided on the outer side of the rotating drum, and a threaded plate is threadedly connected to the external thread, and sliding frames are slidably connected to both sides of the threaded plate, and the sliding frame is fixedly connected to the rear frame.

5. The arthroscopic joint space enlargement device for treating meniscus tear according to claim 1, characterized in that: The control part also includes a control rod, and the bending assembly includes a plurality of rotating racks, wherein a T-block is fixedly connected to the far end of the rotating rack, a C-block is slidably connected to the T-block, a rotating seat is fixedly connected to the C-block, a side shaft is fixedly connected to the rotating seat, and the side shaft is rotatably connected to the rotating rack on the far end side; the far end of the control rod is fixedly connected to the rotating seat and the side shaft, and the rotating rack at the nearest end is rotatably connected to the side shaft of the control rod; the farthest end side shaft is rotatably connected to the rear frame.

6. The arthroscopic joint space enlargement device for treating meniscus tear according to claim 4, characterized in that: The rotating drum is fixedly connected with a ring handle, and the screw rod is fixedly connected with a rotating handle at one end close to the ring handle.

7. The arthroscopic joint space enlargement device for treating meniscus tear according to claim 5, characterized in that: The proximal end of the control rod is fixedly connected with a control ring.

8. The arthroscopic joint space enlargement device for treating meniscus tear according to claim 1, characterized in that: The rear frame on one side is slidably connected with an insertion rod, and the rear frame on the other side is provided with a plurality of insertion holes around the central axis, and the insertion rod is slidably connected in one of the insertion holes.

9. The arthroscopic joint space enlargement device for treating meniscus tear according to claim 4, characterized in that: The rotating shaft connected to the middle frame is parallel to the axis of the central shaft connected to the rear frame, and the tapered grooves of the two groups of opening parts are inclined in opposite directions.

10. The arthroscopic joint space enlargement device for treating meniscus tear according to claim 4, characterized in that: The rotating shaft connected to the middle frame is perpendicular to the axis of the central shaft connected to the rear frame, and the tapered grooves of the two groups of opening parts have the same inclination direction.

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