Guiding and positioning equipment for knee joint puncture surgery

Abstract

The invention belongs to the technical field of medical auxiliary instruments, in particular to guiding and positioning equipment for knee joint puncture surgery, and provides the following scheme that the guiding and positioning equipment specifically comprises a base, a side supporting plate is arranged on the side face of the base, and a leg supporting plate of an arc-shaped structure is fixedly mounted at the top of the base; a horizontally-arranged translation support is fixedly installed at the top of the side supporting plate, a supporting arm is installed above the translation support, a telescopic movable seat is fixedly installed at the front end of the supporting arm, and a patella positioning mechanism of an arc-shaped structure is installed in the middle of the telescopic movable seat. The electric push rod is pushed to drive the surgical instrument to move, the nidus of the knee joint is injected or sucked, then the patella of the knee joint is extruded and displaced through the patella positioning mechanism, and the surgical instrument and the nidus are accurately positioned through the guide mechanism and the puncture guide mechanism; therefore, guiding and positioning operation of the knee joint puncture surgery is completed, and surgery efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary instruments, and particularly relates to a guiding and positioning device for knee joint puncture surgery. Background Art

[0002] The knee joint is the largest and most complex joint in the human body, consisting of structures such as the femur, tibia, patella, meniscus, ligaments, tendons, and synovium, mainly responsible for bearing weight, buffering pressure, and realizing leg flexion and extension activities. Common problems include sports injuries, osteoarthritis, synovitis, etc., which need to be prevented and improved through scientific exercise, weight control, and reasonable exercise methods.

[0003] Knee joint puncture is a medical operation that extracts or injects liquid into the knee joint through aseptic operation for the diagnosis or treatment of joint diseases. The core steps include positioning, disinfection, anesthesia, and puncture for fluid extraction / injection. Currently, most knee joint puncture surgeries require medical staff to manually adjust the patient's leg position and manually press the patella to move the patellar ligament to the side to expose the joint capsule cavity located below the patellar ligament, and perform the puncture action in the joint capsule cavity. This results in only one-handed operation during the knee joint puncture action and cannot accurately position different positions and angles of the patient's knee joint, affecting the efficiency of the puncture surgery.

[0004] In view of this, the present invention provides a guiding and positioning device for knee joint puncture surgery to solve the technical problems existing in the above-mentioned prior art. Summary of the Invention

[0005] Based on the technical problems existing in the background art, the present invention proposes a guiding and positioning device for knee joint puncture surgery.

[0006] A guiding and positioning device for knee joint puncture surgery proposed by the present invention includes a base. A side support plate is provided on the side of the base. A leg support plate with an arc structure is fixedly installed on the top of the base. A horizontally arranged translation bracket is fixedly installed on the top of the side support plate, and a support arm is installed above the translation bracket. A telescopic movable seat is fixedly installed at the front end of the support arm. A patella positioning mechanism with an arc structure is installed in the middle of the telescopic movable seat. A guiding mechanism is installed on the side of the telescopic movable seat, and a puncture guiding mechanism is slidably installed on the outer side of the guiding mechanism.

[0007] Preferably, in the present invention, the base includes a base bracket. A rectangular groove is provided on the side of the base bracket, and an assembly plate is inserted and installed inside the rectangular groove. The end of the assembly plate is fixedly connected to the side support plate. Two rectangular tubes are provided at the end of the base bracket, and rectangular rods are inserted and installed inside both of the two rectangular tubes. A footrest is installed between the ends of the two rectangular rods.

[0008] Preferably, in the present invention, the translation bracket includes a translation slide rail with a U-shaped structure and a translation seat installed at the bottom of the support arm. A plurality of locking holes are equidistantly distributed at the bottom of the translation slide rail, and a vertically movable locking bolt is installed in the middle of the translation seat. The bottom of the locking bolt is adapted to the locking hole.

[0009] Preferably, in the present invention, a plurality of rotatably connected arm rods are provided in the middle of the support arm, and a damping ring and a locking bolt are installed between every two arm rods.

[0010] Preferably, in the present invention, the telescopic movable seat includes a mounting block installed at the end of the support arm. A guiding slide rod is fixedly installed at the upper end of the mounting block, and a bidirectional threaded screw is rotatably installed at the lower end of the mounting block. Extension rods are slidably installed at both ends of the guiding slide rod, and the middle of the extension rod is screwed to the bidirectional threaded screw.

[0011] Preferably, in the present invention, the patella positioning mechanism includes a corrugated shaping tube rotatably installed in the telescopic movable seat. Locking nuts fixedly matched with the telescopic movable seat are screwed on the outer sides of both ends of the corrugated shaping tube. A plurality of connecting plates are fixedly installed in the middle of the corrugated shaping tube, and a collar is installed between adjacent two connecting plates through a damping ball hinge. A patella pressing assembly is fixedly installed in the middle of the collar.

[0012] Preferably, in the present invention, the patella pressing assembly includes a cylinder body. A pressing rod is slidably installed inside the cylinder body. A Y-shaped groove is provided in the middle of the pressing rod. An elastic member with a V-shaped structure is installed inside the Y-shaped groove. A plurality of annular grooves adapted to the edge of the elastic member are provided inside the cylinder body. An operating rod is installed at the end of the Y-shaped groove through a spring, and a flared mouth adapted to the end of the elastic member is provided at the front end position of the operating rod. An ellipsoidal pressing member is rotatably installed at the front end position of the pressing rod through a torsion spring.

[0013] Preferably, in the present invention, the guiding mechanism includes two guiding brackets rotatably connected to the telescopic movable seat. A leg binding strap is installed at the bottom of the guiding brackets. A guiding rod is fixedly installed between the ends of the two guiding brackets, and a positioning portion with an arc-shaped structure is provided in the middle of the guiding rod.

[0014] Preferably, in the present invention, the puncture guiding mechanism includes a puncture guiding component and a puncture pushing component. A damping portion slidably matched with the positioning portion is provided in the middle of the puncture guiding component. Positioning rings locked and fixed to the positioning portion are also screwed on both sides of the puncture guiding component. A guiding groove slidably matched with the puncture pushing component is provided at the top of the puncture guiding component, and a guiding electric push rod engaged and matched with the puncture pushing component is installed inside the guiding groove.

[0015] Preferably, in the present invention, the puncture propulsion assembly includes a puncture seat, a propulsion cavity is provided at the upper end of the puncture seat, a C-shaped groove for clamping and cooperating with the end of the guiding electric push rod is provided at the bottom of the puncture seat, a propulsion electric push rod is installed at the end of the puncture seat, and a connecting fastener with a U-shaped structure is provided at the end of the propulsion electric push rod.

[0016] Compared with the prior art, the present invention provides a guiding and positioning device for knee joint puncture surgery, which has the following beneficial effects: The device can be quickly assembled according to the left or right leg of the patient and the difference between the inner and outer sides of the knee joint, so as to quickly adapt to the knee joint treatment of the patient. At the same time, when the patient undergoes knee joint puncture treatment, the curvature and height position of the knee joint can be maintained through the cooperation of the foot pedal and the guiding mechanism, so as to restrain the knee joint of the patient. Furthermore, the puncture gesture positioning of the patient's knee joint is more stable and accurate, saving the time for manually restraining the patient's knee joint. The patella positioning mechanism and the guiding mechanism are both installed between the two extension rods. The distance between the two extension rods is adjusted by the bidirectional threaded lead screw, so as to adjust the curvature of the patella positioning mechanism and the guiding mechanism. When the corrugated shaping tube bends, the patella extrusion assembly located at the lower end is driven to bend synchronously, quickly adapting to the bent knee joint of the patient. Furthermore, the patella of the patient is moved to the side by the patella extrusion assembly, so that the joint cavity of the knee joint faces the puncture guiding mechanism, fixing the puncture position of the joint cavity of the knee joint. When the guiding mechanism is located on the side of the patient's knee joint, when the leg binding belts at both ends are sleeved on both sides of the patient's knee joint, the arc-shaped positioning part surrounds the patient's knee joint, and the puncture guiding mechanism is pushed to move outside the positioning part. After determining the puncture angle and puncture position, the leg binding belts are tightened and fixed, and the puncture guiding mechanism and the positioning part are locked and fixed to determine the puncture angle and position, avoiding displacement between the patient's knee joint and the puncture guiding mechanism during the knee joint puncture surgery. After the position between the puncture guiding assembly and the positioning part is fixed, the puncture propulsion assembly is inserted into the guiding groove, and then the puncture propulsion assembly can be pushed along the set track towards the knee joint by the guiding electric push rod. When the puncture propulsion assembly moves under the action of the guiding electric push rod and the front end of the surgical instrument pierces into the lesion of the knee joint, the surgical instrument is driven to move by the propulsion electric push rod to perform injection or aspiration actions on the lesion of the knee joint. Furthermore, the patella of the knee joint is squeezed and displaced by the patella positioning mechanism, and the surgical instrument and the lesion position are accurately positioned by the guiding mechanism and the puncture guiding mechanism, thus completing the guiding and positioning operations of the knee joint puncture surgery and improving the surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a guiding and positioning device for knee joint puncture surgery proposed by the present invention; Figure 2Schematic diagram of the base structure of a guiding and positioning device for knee joint puncture surgery proposed by the present invention; Figure 3 Schematic diagram of the translation bracket structure of a guiding and positioning device for knee joint puncture surgery proposed by the present invention; Figure 4 Schematic diagram of the partial structure of a guiding and positioning device for knee joint puncture surgery proposed by the present invention; Figure 5 Schematic diagram of the telescopic movable seat structure of a guiding and positioning device for knee joint puncture surgery proposed by the present invention; Figure 6 Schematic diagram of the guiding mechanism structure of a guiding and positioning device for knee joint puncture surgery proposed by the present invention; Figure 7 Schematic diagram of the patella positioning mechanism structure of a guiding and positioning device for knee joint puncture surgery proposed by the present invention; Figure 8 Schematic diagram of the patella extrusion assembly structure of a guiding and positioning device for knee joint puncture surgery proposed by the present invention; Figure 9 Schematic diagram of the puncture guiding mechanism structure of a guiding and positioning device for knee joint puncture surgery proposed by the present invention.

[0018] In the figure: 1 base, 11 base bracket, 12 rectangular groove, 13 rectangular tube, 14 foot pedal, 2 leg support plate, 3 patella positioning mechanism, 31 corrugated shaping tube, 32 connecting plate, 33 collar, 34 cylinder body, 35 annular groove, 36 extrusion rod, 37 extrusion piece, 38 elastic piece, 39 operating rod, 4 puncture guiding mechanism, 41 puncture guiding assembly, 42 guiding groove, 43 guiding electric push rod, 44 C-shaped groove, 45 puncture seat, 46 propulsion cavity, 47 connecting fastener, 48 propulsion electric push rod, 5 guiding mechanism, 51 guiding bracket, 52 leg binding belt, 53 guiding rod, 54 positioning part, 6 telescopic movable seat, 61 mounting block, 62 bidirectional threaded lead screw, 63 guiding slide rod, 64 extension rod, 7 support arm, 8 translation bracket, 81 translation slide rail, 82 translation seat, 83 locking bolt, 84 locking hole, 9 side support plate, 10 assembly plate. Detailed implementation manners

[0019] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0020] Refer to Figures 1-9, A guiding and positioning device for knee joint puncture surgery, comprising a base 1. A side support plate 9 is arranged on the side of the base 1. A leg support plate 2 with an arc structure is fixedly installed on the top of the base 1. A horizontally arranged translation bracket 8 is fixedly installed on the top of the side support plate 9. A support arm 7 is installed above the translation bracket 8. A telescopic movable seat 6 is fixedly installed at the front end of the support arm 7. A patella positioning mechanism 3 with an arc structure is installed in the middle of the telescopic movable seat 6. A guiding mechanism 5 is installed on the side of the telescopic movable seat 6. A puncture guiding mechanism 4 is slidably installed on the outer side of the guiding mechanism 5.

[0021] As a further scheme in the present invention, the base 1 includes a base bracket 11. A rectangular groove 12 is arranged on the side of the base bracket 11. An assembly plate 10 is inserted and installed inside the rectangular groove 12. The end of the assembly plate 10 is fixedly connected to the side support plate 9. Two rectangular tubes 13 are arranged at the end of the base bracket 11. Rectangular rods are inserted and installed inside both of the two rectangular tubes 13. A footrest 14 is installed between the ends of the two rectangular rods. In the present invention, the device is designed in a modular manner. Among them, the base 1 and the side support plate 9 are connected by the insertion and extraction method of the assembly plate 10. During use, the device can be quickly assembled according to the different left and right legs of the patient and the inside and outside sides of the knee joint, so as to quickly adapt to the knee joint treatment of the patient. At the same time, when the patient undergoes knee joint puncture treatment, the knee joint can also be constrained by the cooperation of the footrest 14 and the guiding mechanism 5 to maintain the bending degree and height position of the knee joint, making the positioning of the patient's knee joint puncture gesture more stable and accurate, and saving the time for manually constraining the patient's knee joint.

[0022] As a further scheme in the present invention, the translation bracket 8 includes a U-shaped translation slide rail 81 and a translation seat 82 installed at the bottom of the support arm 7. A plurality of equally spaced locking holes 84 are arranged at the bottom of the translation slide rail 81. A lock bolt 83 that can move up and down is installed in the middle of the translation seat 82. The bottom of the lock bolt 83 is adapted to the locking hole 84. In the present invention, when the lock bolt 83 is lifted, the translation seat 82 slides freely inside the translation slide rail 81. The support arm 7 slides left and right on the translation slide rail 81 through the translation seat 82 to determine the positions of the patella positioning mechanism 3, the guiding mechanism 5, and the puncture guiding mechanism 4 relative to the patient's knee joint. Then, the lock bolt 83 is pressed down to cooperate with the locking hole 84 to lock the positions of the patella positioning mechanism 3, the guiding mechanism 5, and the puncture guiding mechanism 4. The adjustment process is simple and convenient.

[0023] As a further solution in the present invention, a plurality of rotatably connected arm rods are provided in the middle of the support arm 7, and a damping ring and a locking bolt are installed between every two arm rods. In the present invention, between the arm rods in the middle of the support arm 7, through the setting of the damping ring, the support arm 7 can stay at any height, adjust the positions of the patella positioning mechanism 3, the guiding mechanism 5 and the puncture guiding mechanism 4 relative to the knee joint, and after the adjustment is completed, it is fixed by the locking bolt, so that the support arm 7 forms a stable support structure.

[0024] As a further solution in the present invention, the telescopic movable seat 6 includes a mounting block 61 installed at the end of the support arm 7, and a guiding slide rod 63 is fixedly installed at the upper end of the mounting block 61, and a bidirectional threaded lead screw 62 is rotatably installed at the lower end of the mounting block 61. Extension rods 64 are slidably installed at both ends of the guiding slide rod 63, and the middle of the extension rod 64 is screwed to the bidirectional threaded lead screw 62. In the present invention, the patella positioning mechanism 3 and the guiding mechanism 5 are both installed between the two extension rods 64. By adjusting the distance between the two extension rods 64 through the bidirectional threaded lead screw 62, the arc of the patella positioning mechanism 3 and the guiding mechanism 5 is adjusted, so as to cooperate with the bending movement of the patient's knee joint, and then accurately position the puncture angle of the knee joint, ensure accurate puncture, shorten the operation time, and improve the discomfort of the patient during the knee joint puncture operation.

[0025] As a further solution in the present invention, the patella positioning mechanism 3 includes a corrugated shaping tube 31 rotatably installed in the telescopic movable seat 6, and locking nuts fixedly matched with the telescopic movable seat 6 are screwed on the outer sides of both ends of the corrugated shaping tube 31. A plurality of connecting plates 32 are fixedly installed in the middle of the corrugated shaping tube 31, and a collar 33 is installed between adjacent two connecting plates 32 through a damping ball hinge. A patella pressing assembly is fixedly installed in the middle of the collar 33. In the present invention, a plurality of interconnected patella pressing assemblies are provided in the patella positioning mechanism 3. The two sides of the patella pressing assembly can be rotationally adjusted through the damping ball hinge, and the tops of the plurality of connecting plates 32 are connected through the corrugated shaping tube 31. When the corrugated shaping tube 31 bends, it drives the patella pressing assembly at the lower end to perform a bending action synchronously, quickly adapting to the bent knee joint of the patient, and then moving the patient's patella to the side through the patella pressing assembly, so that the joint cavity of the knee joint faces the puncture guiding mechanism 4, fixing the puncture position of the joint cavity of the knee joint, and helping the doctor quickly and accurately locate the joint cavity lesion, improving the surgical efficiency.

[0026] As a further solution in the present invention, the patella extrusion assembly includes a cylinder body 34, and an extrusion rod 36 is slidably installed inside the cylinder body 34. A Y-shaped groove is provided in the middle of the extrusion rod 36, and an elastic member 38 with a V-shaped structure is installed inside the Y-shaped groove. A plurality of annular grooves 35 adapted to the edge of the elastic member 38 are provided inside the cylinder body 34. An operating rod 39 is installed at the end of the Y-shaped groove through a spring, and a flared mouth adapted to the end of the elastic member 38 is provided at the front end position of the operating rod 39. An ellipsoidal extrusion member 37 is rotatably installed at the front end position of the extrusion rod 36 through a torsion spring. In the present invention, medical staff can drive the elastic member 38 to contract inward by pressing the operating rod 39 with their fingers, and then push the extrusion member 37 close to the knee joint position of the patient. After the fingers leave the operating rod 39, the elastic member 38 cooperates with the annular groove 35 for position locking. When the extrusion member 37 pushes the patella of the patient's knee, the extrusion member 37 is in an ellipsoidal structure, and the extrusion member 37 can perform a rotational movement when pressed. When the extrusion member 37 squeezes the side of the patella of the knee joint, the extrusion member 37 automatically rotates to squeeze into the gap between the patella and the joint capsule cavity, moves the patella and the patellar ligament to the other side, forms a V-shaped movement with the femur and tibia of the knee joint, opens the joint capsule cavity for puncture treatment, avoids patella reduction during the puncture treatment process, and improves the efficiency of the knee joint puncture surgery.

[0027] As a further solution in the present invention, the guiding mechanism 5 includes two guiding brackets 51 rotatably connected to the telescopic movable seat 6, and a leg binding belt 52 is installed at the bottom of the guiding bracket 51. A guiding rod 53 is fixedly installed between the ends of the two guiding brackets 51, and an arc-shaped positioning portion 54 is provided in the middle of the guiding rod 53. In the present invention, when the guiding mechanism 5 is located on the side of the patient's knee joint, when the leg binding belts 52 at both ends are sleeved on both sides of the patient's knee joint, the arc-shaped positioning portion 54 surrounds the patient's knee joint, and the puncture guiding mechanism 4 is pushed to move outside the positioning portion 54. After determining the puncture angle and puncture position, the leg binding belt 52 is tightened and fixed, and the puncture guiding mechanism 4 and the positioning portion 54 are locked and fixed to determine the puncture angle and position, avoiding displacement between the patient's knee joint and the puncture guiding mechanism 4 during the knee joint puncture surgery and improving the guiding and positioning accuracy of the puncture surgery.

[0028] As a further solution in the present invention, the puncture guiding mechanism 4 includes a puncture guiding component 41 and a puncture propulsion component. A damping part that slidably cooperates with the positioning part 54 is provided in the middle of the puncture guiding component 41. Positioning rings that are locked and fixed to the positioning part 54 are also screwed on both sides of the puncture guiding component 41. A guiding groove 42 that slidably cooperates with the puncture propulsion component is provided at the top of the puncture guiding component 41. And a guiding electric push rod 43 that is snap-fitted with the puncture propulsion component is installed inside the guiding groove 42. In the present invention, after the positions between the puncture guiding component 41 and the positioning part 54 are fixed, when the puncture propulsion component is inserted into the guiding groove 42, the puncture propulsion component can be pushed by the guiding electric push rod 43 to move towards the knee joint along a set track, so as to accurately guide and position the puncture position and angle, improving the efficiency and safety of the operation.

[0029] As a further solution in the present invention, the puncture propulsion component includes a puncture seat 45. A propulsion cavity 46 is provided at the upper end of the puncture seat 45. A C-shaped groove 44 that is snap-fitted with the end of the guiding electric push rod 43 is provided at the bottom of the puncture seat 45. A propulsion electric push rod 48 is installed at the end of the puncture seat 45. And a connecting fastener 47 with a U-shaped structure is provided at the end of the propulsion electric push rod 48. In the present invention, the instruments for the puncture operation are loaded into the propulsion cavity 46. When the puncture propulsion component is under the action of the guiding electric push rod 43 and the front end of the surgical instrument pierces into the lesion of the knee joint, the surgical instrument is driven to move by the propulsion electric push rod 48 to perform injection or aspiration actions on the lesion of the knee joint. Furthermore, the patella of the knee joint is squeezed and displaced by the patella positioning mechanism 3, and the positions of the surgical instrument and the lesion are accurately positioned by the guiding mechanism 5 and the puncture guiding mechanism 4, so as to complete the guiding and positioning operations of the knee joint puncture operation and improve the operation efficiency.

[0030] During use, the device can be quickly assembled according to the differences between the patient's left and right legs and the inner and outer sides of the knee joint, so as to quickly adapt to the knee joint treatment of the patient. At the same time, when the patient undergoes knee joint puncture treatment, the curvature and height position of the knee joint can be maintained through the cooperation of the foot pedal 14 and the guiding mechanism 5 to restrain the patient's knee joint. Thus, the positioning of the patient's knee joint puncture gesture is more stable and accurate, saving the time for manually restraining the patient's knee joint. The patella positioning mechanism 3 and the guiding mechanism 5 are both installed between the two extension rods 64. The distance between the two extension rods 64 is adjusted through the bidirectional lead screw 62, and then the arc of the patella positioning mechanism 3 and the guiding mechanism 5 is adjusted. When the corrugated shaping tube 31 bends, it drives the patella extrusion assembly at the lower end to perform a synchronous bending action, quickly adapting to the bent knee joint of the patient. Then, the patella of the patient is moved to the side through the patella extrusion assembly, so that the joint cavity of the knee joint faces the puncture guiding mechanism 4, and the puncture position of the joint cavity of the knee joint is fixed. When the guiding mechanism 5 is located on the side of the patient's knee joint, when the leg binding belts 52 at both ends are sleeved on both sides of the patient's knee joint, the arc-shaped positioning part 54 surrounds the patient's knee joint, and the puncture guiding mechanism 4 is pushed to move outside the positioning part 54. After determining the puncture angle and puncture position, the leg binding belts 52 are tightened and fixed, and the puncture guiding mechanism 4 and the positioning part 54 are locked and fixed to determine the puncture angle and position, avoiding displacement between the patient's knee joint and the puncture guiding mechanism 4 during the knee joint puncture operation. After the position between the puncture guiding component 41 and the positioning part 54 is fixed, the puncture propulsion component is inserted into the guiding groove 42, and then the puncture propulsion component can be pushed along the set track towards the knee joint by the guiding electric push rod 43. When the puncture propulsion component moves under the action of the guiding electric push rod 43 and the front end of the surgical instrument pierces into the lesion of the knee joint, the surgical instrument is driven to move by the propulsion electric push rod 48 to perform injection or aspiration actions on the lesion of the knee joint.

[0031] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A guiding and positioning device for knee puncture surgery, comprising a base (1), a side support plate (9) is arranged on the side of the base (1), and a leg support plate (2) with an arc-shaped structure is fixedly installed on the top of the base (1), characterized in that, A horizontally arranged translation bracket (8) is fixedly installed at the top of the side support plate (9), and a support arm (7) is installed above the translation bracket (8). An expansion movable seat (6) is fixedly installed at the front end of the support arm (7). A patella positioning mechanism (3) with an arc-shaped structure is installed in the middle of the expansion movable seat (6). A guiding mechanism (5) is installed on the side of the expansion movable seat (6), and a puncture guiding mechanism (4) is slidably installed on the outer side of the guiding mechanism (5).

2. The guiding and positioning device for knee joint puncture surgery according to claim 1, wherein The base (1) includes a base bracket (11). A rectangular groove (12) is arranged on the side of the base bracket (11), and an assembly plate (10) is inserted and installed inside the rectangular groove (12). The end of the assembly plate (10) is fixedly connected to the side support plate (9). Two rectangular tubes (13) are arranged at the end of the base bracket (11), and rectangular rods are inserted and installed inside both of the two rectangular tubes (13). A footrest (14) is installed between the ends of the two rectangular rods.

3. The guiding and positioning device for knee joint puncture surgery according to claim 1, characterized in that, The translation bracket (8) includes a U-shaped translation slide rail (81) and a translation seat (82) installed at the bottom of the support arm (7). A plurality of locking holes (84) are arranged at equal intervals at the bottom of the translation slide rail (81), and a vertically movable locking bolt (83) is installed in the middle of the translation seat (82). The bottom of the locking bolt (83) is adapted to the locking hole (84).

4. A guiding and positioning device for knee joint puncture surgery according to claim 3, characterized in that, A plurality of rotatably connected arm rods are arranged in the middle of the support arm (7), and a damping ring and a locking bolt are installed between every two arm rods.

5. The guiding and positioning device for knee joint puncture surgery according to claim 1, wherein The expansion movable seat (6) includes a mounting block (61) installed at the end of the support arm (7). A guiding slide rod (63) is fixedly installed at the upper end of the mounting block (61). A bidirectional threaded screw (62) is rotatably installed at the lower end of the mounting block (61). Extension rods (64) are slidably installed at both ends of the guiding slide rod (63), and the middle of the extension rod (64) is screwed to the bidirectional threaded screw (62).

6. The guiding and positioning device for knee joint puncture surgery according to claim 5, wherein, The patella positioning mechanism (3) includes a corrugated shaping tube (31) rotatably installed in the expansion movable seat (6). Locking nuts fixedly matched with the expansion movable seat (6) are screwed on the outer sides of both ends of the corrugated shaping tube (31). A plurality of connecting plates (32) are fixedly installed in the middle of the corrugated shaping tube (31), and a collar (33) is installed between adjacent two connecting plates (32) through a damping ball hinge. A patella pressing assembly is fixedly installed in the middle of the collar (33).

7. The guiding and positioning device for knee joint puncture surgery according to claim 6, characterized in that, The patella pressing assembly includes a cylinder body (34), and a pressing rod (36) is slidably installed inside the cylinder body (34). A Y-shaped groove is provided in the middle of the pressing rod (36). An elastic member (38) with a V-shaped structure is installed inside the Y-shaped groove. A plurality of annular grooves (35) adapted to the edge of the elastic member (38) are provided inside the cylinder body (34). The end of the Y-shaped groove is provided with an operating rod (39) through a spring, and a flared mouth adapted to the end of the elastic member (38) is provided at the front end position of the operating rod (39). An ellipsoidal pressing member (37) is rotatably installed at the front end position of the pressing rod (36) through a torsion spring.

8. A guiding and positioning device for knee joint puncture surgery according to claim 5, characterized in that, The guiding mechanism (5) includes two guiding brackets (51) rotatably connected to the telescopic movable seat (6). A leg binding strap (52) is installed at the bottom of the guiding bracket (51). A guiding rod (53) is fixedly installed between the ends of the two guiding brackets (51), and an arc-shaped positioning portion (54) is provided in the middle of the guiding rod (53).

9. The guiding and positioning device for knee joint puncture surgery according to claim 8, characterized in that, The puncture guiding mechanism (4) includes a puncture guiding assembly (41) and a puncture propulsion assembly. A damping portion slidably engaged with the positioning portion (54) is provided in the middle of the puncture guiding assembly (41). Positioning rings locked and fixed to the positioning portion (54) are also screwed on both sides of the puncture guiding assembly (41). A guiding groove (42) slidably engaged with the puncture propulsion assembly is provided at the top of the puncture guiding assembly (41), and a guiding electric push rod (43) engaged and cooperated with the puncture propulsion assembly is installed inside the guiding groove (42).

10. The guiding and positioning device for knee joint puncture surgery according to claim 9, wherein, The puncture propulsion assembly includes a puncture seat (45). A propulsion cavity (46) is provided at the upper end of the puncture seat (45). A C-shaped groove (44) engaged and cooperated with the end of the guiding electric push rod (43) is provided at the bottom of the puncture seat (45). A propulsion electric push rod (48) is installed at the end of the puncture seat (45), and a U-shaped connecting fastener (47) is provided at the end of the propulsion electric push rod (48).

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