Vertebral operation drag hook

Abstract

The invention discloses a spinal surgery drag hook which comprises a shifting mechanism, the shifting mechanism comprises a first threaded rod, a second threaded rod, a first moving block, a second moving block, a sliding rod, a moving rod and a fixing frame, clamping mechanisms are arranged at the four corners of the top end of the shifting mechanism, and each clamping mechanism comprises a rotary knob, a clamping rod, a roller and a rubber pad. A drag hook mechanism is arranged on the outer side of the supporting rod and comprises a drag hook sleeve, a limiting sleeve, a limiting button, a drag hook, a first fixing block, a moving rod and a spring. According to the surgical retractor, it is guaranteed that the shifting mechanism can be arranged at the bottom of an operating bed through the multiple sets of clamping mechanisms arranged at the top end of the shifting mechanism, so that the width of the retractor is controlled, the length of an operating area is controlled through the retractor, and the effect that the fine angle or distance can be adjusted in real time according to the actual situation of a patient is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of medical instrument research, in particular to a spinal surgery retractor. Background Art

[0002] Orthopedics, also known as orthopedic surgery, is a specialty or discipline in medicine that specializes in the anatomy, physiology, and pathology of the musculoskeletal system. It uses drugs, surgery, and physical methods to maintain and develop the normal form and function of this system, as well as to treat injuries and diseases of this system. Clinically, metal fasteners need to be implanted in the surgical site during orthopedic spine reinforcement surgery. During the operation, the metal fasteners need to be implanted in the bone while the tendons around the bone are pried open.

[0003] During the operation, the skin and subcutaneous tissue are cut along the direction of the incision, and the spinous process is exposed from the lower end to the upper end of the incision. The thoracic paravertebral muscles are pushed from under the periosteum to the tip of the transverse process close to the spinous process and vertebral lamina. In the lumbar spine, the outside of the articular process is exposed. At this time, the muscles and skin will block the patient's surgical area, and a retractor is needed to expose the patient's surgical area to facilitate the surgeon to perform the operation. The paravertebral muscles on the concave and convex side of the spine are retracted with a vertebral lamina retractor to expand the exposure range. After exposure, pedicle screws are inserted. Pedicle screws are suitable for a variety of surgical operations such as spinal fractures, lumbar spondylolisthesis and scoliosis.

[0004] When the surgical retractor in the prior art is used, the patient's muscles and skin are manually pulled, which will cause soreness in the assistant doctor's arms for a long time, making it impossible to effectively control the retractor, and it is impossible to adjust and lock the length and width according to the patient's actual surgical area, because the assistant doctor cannot accurately limit the force used to pull the retractor and also requires a high level of technical proficiency to operate the retractor. This results in the traditional retractor causing compressive or ischemic injuries to the muscles and nerves during the operation, and may also cause serious consequences such as tissue damage, bleeding, and secondary tendon injury. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a spinal surgery retractor to solve the technical problems that manual pulling of the patient's muscles and skin for a long time will cause soreness in the assistant physician's arms, making it impossible to effectively control the retractor, and it is impossible to adjust and lock the length and width according to the patient's actual surgical area, and the assistant physician cannot accurately limit the force used to pull the retractor and requires a high level of technical proficiency to operate the retractor.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spinal surgery retractor, comprising a displacement mechanism, wherein the displacement mechanism comprises a first threaded rod, a second threaded rod, a first moving block, a second moving block, a sliding rod, a moving rod and a fixing frame, wherein the first threaded rod is arranged inside the fixing frame, and a through hole matching with the first threaded rod is provided inside the fixing frame, the second threaded rod is arranged at the bottom end of the fixing frame, the first moving block is arranged outside the second threaded rod, the second moving block is arranged at the top end of the moving rod, the sliding rod is fixed inside the first moving block, the moving rod is arranged outside the first threaded rod, and a threaded cavity matching with the first threaded rod is provided inside the moving rod, and the fixing frame is fixed outside the first threaded rod;

[0007] The four corners of the top of the shifting mechanism are all provided with a clamping mechanism, and the clamping mechanism includes a knob, a clamping rod, a roller and a rubber pad. The knob is arranged inside the clamping rod, the clamping rod is fixed to the top of the shifting mechanism, the roller is arranged inside the clamping rod, and the rubber pad is fixed to one end of the knob;

[0008] A support rod is provided at the top of the second movable block, and a hook mechanism is provided at the outer side of the support rod. The hook mechanism includes a hook sleeve, a limit sleeve, a limit button, a hook, a first fixed block, a movable rod and a spring. The hook sleeve is fixed at one end of the support rod, the limit sleeve is arranged at one end of the hook sleeve, the limit button is arranged inside the limit sleeve, the hook is movably connected with the hook sleeve, the first fixed block is fixed at one end of the hook, the movable rod is movably connected to the bottom end of the support rod, the spring is arranged inside the limit button, and a first rocker is provided at one end of the first threaded rod.

[0009] By adopting the above technical solution, when in use, the assistant physician manually pushes the shifting mechanism arranged at the bottom of the operating table, and the movement of the shifting mechanism drives the engaging mechanism arranged at the four corners of the top, so that the roller arranged inside the engaging mechanism can slide along the armrest arranged on the operating table, thereby driving the shifting mechanism to move its position, and thus the hook mechanism can move its position;

[0010] When it moves to a suitable position, the assistant physician can rotate the first crank handle to rotate the first threaded rod. When the first threaded rod rotates, the two groups of moving rods arranged on the outside thereof are driven to move, and the two groups of moving rods are moved in opposite directions through the threads on the outside of the threaded rod.

[0011] The support rod fixed at the top of the second moving block arranged at the top of the moving rod drives the fixed hook mechanism to unfold, and then the patient is instructed to lie prone on the operating table, and the patient's back is controlled to be exposed between the two groups of pillows on the operating table. Then, when the surgeon cuts the surgical site of the patient, the assistant surgeon can rotate the first crank handle to rotate the first threaded rod, and the rotation of the first threaded rod can move the moving rods on both sides inward.

[0012] Thereby, the retractor mechanism is driven to move inward. When it moves to a suitable position, the staff can stop turning the first crank handle, and then the assistant doctor manually presses the limit button provided at one end of the retractor mechanism. When the limit button is pressed, it moves toward the inside of the retractor sleeve due to its internal structure, so that the limit button is no longer engaged in the limit sleeve, so that the retractor can move up and down inside the retractor sleeve. When the assistant doctor repeats the above operation, the multiple groups of retractors inside the retractor sleeve can stop when they reach the auxiliary position suitable for the patient, and then the assistant doctor fits the patient's muscles and skin that obstruct the doctor's surgical field of view to one end of the retractor;

[0013] Then the assistant physician rotates the second crank handle, and rotates the rotating rod fixed at one end thereof through the second crank handle, and then drives the second threaded rod through the bevel gear set provided at one end of the rotating rod. When the second threaded rod rotates, the threads on its outer side and the first moving block meshing with the threads on its outer side move in the opposite direction, and when the first moving block moves, it drives the sliding rod fixed inside thereof to move, thereby connecting with the sliding rod through the limiting block provided inside the second moving block, thereby driving the second moving block to move longitudinally at the top end of the moving rod, and enabling the supporting rod fixed at the top end of the second moving block to move, thereby driving the retractor mechanism provided on the outer side and the retractor provided inside thereof to move longitudinally, thereby stretching the muscles and skin of the patient's surgical area that obstruct the field of vision through the movement of the retractor mechanism;

[0014] Through the above structure, there is no need to manually control the retractor for a long time, which will cause arm soreness to the assistant doctor, and the retractor can be effectively controlled. The length and width can be adjusted and locked according to the actual surgical area of ​​the patient. The shape of the retractor and the cavity opened inside it can increase the overall contact area with the patient's muscles and skin, thereby preventing secondary injuries caused by excessive support force on a small area.

[0015] Furthermore, a threaded hole matched with the second threaded rod is provided inside the first moving block, and two groups of bearings matched with the second threaded rod are provided inside the fixing frame.

[0016] By adopting the above technical solution, the threaded holes provided inside the second threaded rod and the first moving block can ensure that when the second threaded rod rotates, the first moving block can move accordingly according to the rotation direction.

[0017] Furthermore, the displacement mechanism and the engaging rod are fixed by welding, and a bearing matching with the roller is arranged inside the engaging rod.

[0018] By adopting the above technical solution, the stability between the displacement mechanism and the engaging rod is ensured by welding, thereby preventing subsequent shaking which may affect the subsequent work effect.

[0019] Furthermore, a groove matching with the moving rod is provided inside the support rod, and the moving rod and the first fixed block are limited by a rotating rod.

[0020] By adopting the above technical solution, the grooves provided inside the support rod ensure that the moving rod can slide stably, thereby preventing the moving rod from being offset or dislocated while sliding.

[0021] Furthermore, a cavity is provided inside the draw hook, and a clamping cavity cooperating with the limit button is provided inside the limit sleeve.

[0022] By adopting the above technical solution, the cavity inside the retractor can increase the overall contact area for blocking and advancing the patient's muscles and skin during surgery, thereby avoiding secondary injuries to the patient due to the small contact area during use.

[0023] Furthermore, a limiting block is arranged inside the second moving block, and a cavity cooperating with the sliding rod is opened inside the limiting block.

[0024] By adopting the above technical solution, the limiting block is used to ensure that the slide bar can be engaged and limited, thereby avoiding dislocation during use, thereby affecting the movement of the hook.

[0025] Furthermore, a rotating rod is provided at the bottom end of the fixing frame, and the rotating rod is fixed to the second threaded rod via a bevel gear set.

[0026] By adopting the above technical solution, through the cooperation of the rotating rod and the bevel gear set, the second threaded rod can be rotated synchronously through the rotation of the rotating rod.

[0027] Furthermore, a plurality of groups of second fixing blocks matched with the rotating rod are arranged at the bottom end of the fixing frame, and a second rocking handle is arranged at one end of the rotating rod.

[0028] By adopting the above technical solution, multiple groups of second fixing blocks are arranged at the bottom end of the fixing frame to ensure that the rotating rod will not shake or dislocate while rotating.

[0029] Furthermore, a limiting plate is arranged inside the second moving block, and a sliding cavity cooperating with the limiting plate is opened inside the moving rod.

[0030] By adopting the above technical solution, two groups of limit plates arranged inside the second moving block clamp the two groups of sliding cavities inside the moving rod, so as to ensure that the pull hook will not tilt due to the force during the sliding process.

[0031] In summary, the present invention mainly has the following beneficial effects: the present invention ensures that the shifting mechanism can be arranged at the bottom of the operating bed by means of multiple sets of engaging mechanisms arranged at the top of the shifting mechanism, and moves along the fixed armrest of the operating bed through the rollers arranged inside the engaging mechanism, thereby driving the shifting mechanism to move its position, and can also drive the rubber pad arranged at one end of the knob to fit the operating bed armrest through the internal thread by rotating the knob, and fix the shifting mechanism through the extrusion of the rubber pad and the surgical aid, and then rotate the first threaded rod through the first crank handle, and the threaded rod is rotated by the rotation of the first threaded rod The two groups of moving rods arranged on the outside perform synchronous opposite movements, so that the support rod arranged on the top thereof drives the hook mechanism fixed on the outside thereof to move to the left and right sides, so as to realize the control of the width of the hook, and then the second threaded rod can be rotated by rotating the second crank handle, thereby driving the two groups of first moving blocks so that the second moving blocks can perform opposite movements on the moving rod, so that the four groups of hooks arranged inside the hook mechanism will move in opposite longitudinal directions, thereby realizing the control of the length of the surgical area by the hook, and can achieve the effect of stably and effectively controlling the hook for a long time, and can also perform real-time subtle angle or distance adjustment according to the actual situation of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an overall schematic diagram of the present invention;

[0033] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0034] Figure 3 For the present invention Figure 2 A magnified image of point A;

[0035] Figure 4 It is a partial structural schematic diagram of the present invention;

[0036] Figure 5 For the present invention Figure 4 The enlarged view of point B;

[0037] Figure 6 It is a schematic diagram of the local structure of the present invention;

[0038] Figure 7 It is a disassembly schematic diagram of the present invention;

[0039] Figure 8 For the present invention Figure 7 Enlarged view of point C;

[0040] Fig. 9 For the present invention Figure 7 The enlarged view of point D;

[0041] Fig.10 It is a schematic diagram of the hook mechanism of the present invention;

[0042] Fig.11 For the present invention Fig.10 The enlarged view of point E;

[0043] Fig.12 It is a schematic diagram of the assembly of the present invention.

[0044] In the figure: 1. shift mechanism; 101. first threaded rod; 102. second threaded rod; 103. first moving block; 104. second moving block; 105. slide rod; 106. moving rod; 107. fixed frame; 2. engaging mechanism; 201. knob; 202. engaging rod; 203. roller; 204. rubber pad; 3. first crank handle; 4. support rod; 5. hook mechanism; 501. hook sleeve; 502. limit sleeve; 503. limit button; 504. hook; 505. first fixed block; 506. moving rod; 507. spring; 6. limit block; 7. groove; 8. bevel gear set; 9. second fixed block; 10. rotating rod; 11. slide block; 12. second crank handle. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] The following describes an embodiment of the present invention based on its overall structure.

[0047] like Figure 1-Figure 12As shown, the spinal surgery retractor of the present invention includes a displacement mechanism 1, which includes a first threaded rod 101, a second threaded rod 102, a first moving block 103, a second moving block 104, a slide bar 105, a moving rod 106 and a fixing frame 107. The first threaded rod 101 is arranged inside the fixing frame 107, and a through hole matching the first threaded rod 101 is opened inside the fixing frame 107. The second threaded rod 102 is arranged at the bottom end of the fixing frame 107, the first moving block 103 is arranged outside the second threaded rod 102, the second moving block 104 is arranged at the top of the moving rod 106, and the slide bar 105 is fixed on the first moving rod 101. Inside the block 103, the moving rod 106 is arranged outside the first threaded rod 101, and a threaded cavity matching the first threaded rod 101 is opened inside the moving rod 106, and the fixing frame 107 is fixed outside the first threaded rod 101. When in use, the shifting mechanism 1 arranged at the bottom of the operating table is manually pushed by the assistant physician, and the clamping mechanism 2 arranged at the four corners of the top is driven by the movement of the shifting mechanism 1, so that the roller 203 arranged inside the clamping mechanism 2 can slide along the handrail arranged on the operating table, thereby driving the shifting mechanism 1 to move its position, so that the hook mechanism 5 can move its position;

[0048] Exemplarily, the four corners of the top of the shifting mechanism 1 are all provided with a locking mechanism 2, the locking mechanism 2 includes a knob 201, a locking rod 202, a roller 203 and a rubber pad 204, the knob 201 is arranged inside the locking rod 202, the locking rod 202 is fixed at the top of the shifting mechanism 1, the roller 203 is arranged inside the locking rod 202, and the rubber pad 204 is fixed at one end of the knob 201, wherein when it is moved to a suitable position, the assistant physician can rotate the first crank handle 3, and the rotation of the first crank handle 3 can rotate the first threaded rod 101, when the first threaded rod 101 rotates, it will drive the two groups of moving rods 506 arranged on the outside thereof to move, and the two groups of moving rods 506 are moved in opposite directions through the threads on the outside of the threaded rod 101;

[0049] Exemplarily, a support rod 4 is provided at the top of the second moving block 104, and a hook mechanism 5 is provided on the outer side of the support rod 4. The hook mechanism 5 includes a hook sleeve 501, a limit sleeve 502, a limit button 503, a hook 504, a first fixed block 505, a moving rod 506 and a spring 507. The hook sleeve 501 is fixed at one end of the support rod 4, the limit sleeve 502 is arranged at one end of the hook sleeve 501, the limit button 503 is arranged inside the limit sleeve 502, the hook 504 is movably connected with the hook sleeve 501, the first fixed block 505 is fixed at one end of the hook 504, the moving rod 506 is movably connected to the bottom end of the support rod 4, the spring 507 is arranged inside the limit button 503, and a first crank handle 3 is provided at one end of the first threaded rod 101, wherein the support rod 4 fixed at the top of the second moving block 104 arranged at the top of the moving rod 506 is driven to be fixed. The hook mechanism 5 is unfolded, and then the patient is instructed to lie prone on the operating table, and the patient's back is controlled to be exposed between the two groups of pillows on the operating table. Then, when the surgeon cuts the patient's surgical site, the assistant physician can rotate the first crank handle 3 to rotate the first threaded rod 101, and the rotation of the first threaded rod 101 causes the moving rods 506 on both sides to move inward, so that the support rod 4 fixed at the top of the second moving block 104 set at the top of the moving rod 506 drives the fixed hook mechanism 5 to be unfolded, and then the patient is instructed to lie prone on the operating table, and the patient's back is controlled to be exposed between the two groups of pillows on the operating table. Then, when the surgeon cuts the patient's surgical site, the assistant physician can rotate the first crank handle 3 to rotate the first threaded rod 101, and the rotation of the first threaded rod 101 causes the moving rods 506 on both sides to move inward.

[0050] Exemplarily, a threaded hole matched with the second threaded rod 102 is provided inside the first moving block 103, and two groups of bearings matched with the second threaded rod 102 are provided inside the fixing frame 107, which drive the hook mechanism 5 to move inward. When it moves to a suitable position, the staff can stop rotating the first crank handle 3, and then the assistant doctor manually presses the limit button 503 provided at one end of the hook mechanism 5. When the limit button 503 is pressed, it will move toward the inside of the hook sleeve 501 due to its internal position, so that the limit button 502 is no longer engaged in the limit sleeve 502, so that the hook 504 can move up and down inside the hook sleeve 501. When the assistant doctor repeats the above operation, the multiple groups of hooks 504 inside the hook sleeve 501 can stop when they reach an auxiliary position suitable for the patient, and then the assistant doctor fits the patient's muscles and skin that hinder the doctor's surgical field of view to one end of the hook 504;

[0051] Exemplarily, the shift mechanism 1 and the engaging rod 202 are fixed by welding, and a bearing matching with the roller 203 is arranged inside the engaging rod 202. The shift mechanism 1 and the engaging rod 202 are fixed by welding, wherein the welding between the shift mechanism 1 and the engaging rod 202 ensures its stability, thereby preventing subsequent shaking, thereby affecting the overall operation effect of the hook;

[0052] Exemplarily, a bearing matching with the roller 203 is arranged inside the engaging rod 202, a groove 7 matching with the moving rod 506 is arranged inside the supporting rod 4, the moving rod 506 and the first fixing block 505 are limited by a rotating rod, a cavity is arranged inside the retractor 504, a locking cavity matching with the limiting button 503 is arranged inside the limiting sleeve 502, and a rotating rod 10 is arranged at the bottom end of the fixing frame 107, wherein the assistant physician then rotates the second crank handle 12, and rotates the rotating rod 10 fixed at one end thereof through the second crank handle 12, and then drives the second threaded rod 102 through the bevel gear set 8 arranged at one end of the rotating rod 10, when the second threaded rod 102 rotates;

[0053] Exemplarily, the rotating rod 10 and the second threaded rod 102 are fixed by a bevel gear set 8, and a plurality of second fixed blocks 9 matched with the rotating rod 10 are arranged at the bottom end of the fixing frame 107, and a second crank handle 12 is arranged at one end of the rotating rod 10, wherein, because the outer thread and the first moving block 103 meshing with the outer thread move in opposite directions, and when the first moving block 103 moves, it will drive the sliding rod 105 fixed inside to move, so that the limiting block 6 arranged inside the second moving block 104 is connected with the sliding rod 105, so that the second moving block 104 can be driven to move longitudinally at the top of the moving rod 106, and the supporting rod 4 fixed at the top of the second moving block 104 can be moved, so as to drive the hook mechanism 5 arranged on the outside and the hook 501 arranged inside to move longitudinally, so that the muscles and skin of the patient's surgical area that obstruct the field of vision are stretched open by the movement of the hook mechanism 5;

[0054] Exemplarily, a slider 11 is provided at one end of the sliding rod 105, sliding cavities cooperating with the slider 11 are provided at both ends of the fixing frame 107, a limiting plate is provided inside the second movable block 104, and a sliding cavity cooperating with the limiting plate is provided inside the movable rod 106, thereby achieving the effect of eliminating the need for manual long-term control of the retractor to cause arm soreness to the assistant physician, and the retractor can be effectively controlled, and the length and width can be adjusted and locked according to the actual surgical area of ​​the patient, and the shape of the retractor 504 and the cavity provided therein can be used to increase the overall area in contact with the patient's muscles and skin, thereby preventing secondary injuries caused by excessive support force on a small area.

[0055] The working principle of the present invention is as follows: when in use, the assistant doctor manually pushes the shift mechanism 1 disposed at the bottom of the operating table, and the movement of the shift mechanism 1 drives the engaging mechanism 2 disposed at the four corners of the top, so that the roller 203 disposed inside the engaging mechanism 2 can slide along the armrest disposed on the operating table, thereby driving the shift mechanism 1 to move its position, and thus enabling the hook mechanism 5 to move its position;

[0056] When it moves to a suitable position, the assistant doctor can rotate the first crank handle 3, and the rotation of the first crank handle 3 causes the first threaded rod 101 to rotate. When the first threaded rod 101 rotates, the two groups of moving rods 506 arranged on the outside thereof are driven to move, and the two groups of moving rods 506 are moved in opposite directions through the threads on the outside of the threaded rod 101.

[0057] The support rod 4 fixed at the top of the second moving block 104 arranged at the top of the moving rod 506 drives the fixed hook mechanism 5 to unfold, and then the patient is instructed to lie prone on the operating table, and the patient's back is controlled to be exposed between the two sets of pillows on the operating table. Then, when the surgeon cuts the surgical site of the patient, the assistant surgeon can rotate the first crank handle 3 to rotate the first threaded rod 101, and the rotation of the first threaded rod 101 can move the moving rods 506 on both sides inward.

[0058] Thereby, the hook mechanism 5 is driven to move inward. When it moves to a suitable position, the staff can stop rotating the first crank handle 3, and then the assistant doctor manually presses the limit button 503 provided at one end of the hook mechanism 5. When the limit button 503 is pressed, it moves toward the inside of the hook sleeve 501 due to its internal structure, so that the limit button 502 is no longer engaged in the limit sleeve 502, so that the hook 504 can move up and down inside the hook sleeve 501. When the assistant doctor repeats the above operation, the multiple groups of hooks 504 inside the hook sleeve 501 can stop when they reach a suitable auxiliary position for the patient. Then the assistant doctor fits the patient's muscles and skin that obstruct the doctor's surgical field of view to one end of the hook 504.

[0059] Then the assistant doctor rotates the second crank handle 12, and rotates the rotating rod 10 fixed at one end thereof through the second crank handle 12, and then drives the second threaded rod 102 through the bevel gear set 8 provided at one end of the rotating rod 10. When the second threaded rod 102 rotates, the threads on its outer side and the first moving block 103 meshing with the threads on its outer side move in the opposite direction, and when the first moving block 103 moves, it drives the sliding rod 105 fixed inside thereof to move, thereby connecting with the sliding rod 105 through the limit block 6 provided inside the second moving block 104, so as to drive the second moving block 104 to move longitudinally at the top end of the moving rod 106, and enable the supporting rod 4 fixed at the top end of the second moving block 104 to move, thereby driving the hook mechanism 5 provided on the outer side and the hook sleeve 501 provided inside thereof to move longitudinally, so as to open the muscles and skin of the patient's surgical area that obstruct the field of vision through the movement of the hook mechanism 5;

[0060] Through the above structure, there is no need to manually control the retractor for a long time to avoid sore arms of the assistant physician, and the retractor can be effectively controlled. The length and width can be adjusted and locked according to the actual surgical area of ​​the patient, and the shape of the retractor 504 and the cavity opened inside it can increase the overall contact area with the patient's muscles and skin, thereby preventing secondary injuries caused by excessive support force on a small area.

[0061] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A spinal surgery retractor, comprising a displacement mechanism (1), characterized in that: The displacement mechanism (1) comprises a first threaded rod (101), a second threaded rod (102), a first moving block (103), a second moving block (104), a sliding rod (105), a moving rod (106) and a fixing frame (107). The first threaded rod (101) is arranged inside the fixing frame (107), and a through hole matching the first threaded rod (101) is provided inside the fixing frame (107). The second threaded rod (102) is arranged at the bottom of the fixing frame (107). end, the first moving block (103) is arranged on the outside of the second threaded rod (102), the second moving block (104) is arranged on the top of the moving rod (106), the sliding rod (105) is fixed inside the first moving block (103), the moving rod (106) is arranged on the outside of the first threaded rod (101), and a threaded cavity matching the first threaded rod (101) is opened inside the moving rod (106), and the fixing frame (107) is fixed on the outside of the first threaded rod (101); The four corners of the top of the displacement mechanism (1) are all provided with a locking mechanism (2), the locking mechanism (2) comprising a knob (201), a locking rod (202), a roller (203) and a rubber pad (204), the knob (201) being arranged inside the locking rod (202), the locking rod (202) being fixed to the top of the displacement mechanism (1), the roller (203) being arranged inside the locking rod (202), and the rubber pad (204) being fixed to one end of the knob (201); A support rod (4) is arranged at the top end of the second moving block (104), a hook mechanism (5) is arranged on the outside of the support rod (4), the hook mechanism (5) comprises a hook sleeve (501), a limit sleeve (502), a limit button (503), a hook (504), a first fixed block (505), a moving rod (506) and a spring (507), the hook sleeve (501) is fixed at one end of the support rod (4), the limit sleeve (502) is arranged on the outside of the support rod (4), and the hook mechanism (5) comprises a hook sleeve (501), a limit sleeve (502), a limit button (503), a hook (504), a first fixed block (505), a moving rod (506) and a spring (507). At one end of the hook sleeve (501), the limit button (503) is arranged inside the limit sleeve (502), the hook (504) is movably connected to the hook sleeve (501), the first fixing block (505) is fixed to one end of the hook (504), the moving rod (506) is movably connected to the bottom end of the support rod (4), the spring (507) is arranged inside the limit button (503), and the first end of the first threaded rod (101) is provided with a first crank handle (3).

2. A spinal surgery retractor according to claim 1, characterized in that: A threaded hole matching the second threaded rod (102) is provided inside the first moving block (103), and two groups of bearings matching the second threaded rod (102) are provided inside the fixing frame (107).

3. A spinal surgery retractor according to claim 1, characterized in that: The displacement mechanism (1) and the engaging rod (202) are fixed by welding, and a bearing matching with the roller (203) is arranged inside the engaging rod (202).

4. A spinal surgery retractor according to claim 1, characterized in that: A groove (7) matching with the moving rod (506) is provided inside the support rod (4), and the moving rod (506) and the first fixed block (505) are limited by a rotating rod.

5. A spinal surgery retractor according to claim 1, characterized in that: The pull hook (504) has a cavity inside, and the limiting sleeve (502) has a locking cavity that matches the limiting button (503) inside.

6. A spinal surgery retractor according to claim 1, characterized in that: A limit block (6) is arranged inside the second moving block (104), and a cavity matching with the sliding rod (105) is provided inside the limit block (6).

7. A spinal surgery retractor according to claim 1, characterized in that: A rotating rod (10) is provided at the bottom end of the fixing frame (107), and the rotating rod (10) and the second threaded rod (102) are fixed via a bevel gear set (8).

8. A spinal surgery retractor according to claim 7, characterized in that: A plurality of groups of second fixing blocks (9) matched with the rotating rod (10) are arranged at the bottom end of the fixing frame (107), and a second crank handle (12) is arranged at one end of the rotating rod (10).

9. The spinal surgery retractor according to claim 1, characterized in that: A sliding block (11) is provided at one end of the sliding rod (105), and sliding cavities matching the sliding block (11) are provided at both ends of the fixing frame (107).

10. The spinal surgery retractor according to claim 1, characterized in that: A limiting plate is arranged inside the second moving block (104), and a sliding cavity matching the limiting plate is opened inside the moving rod (106).

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