Distraction device for minimally invasive surgery

Abstract

The invention relates to the technical field of medical instruments, in particular to a minimally invasive surgery distraction device which comprises a C-shaped guide bottom plate, a distraction mechanism is movably connected to the top of the C-shaped guide bottom plate, the C-shaped guide bottom plate comprises a C-shaped guide bottom plate body, and a C-shaped sliding rail is fixedly connected to the middle of the top of the C-shaped guide bottom plate body; a plurality of positioning grooves are formed in the positions, on one side of the outer side of the C-shaped sliding rail, of the top of the C-shaped guide bottom plate body, the opening mechanism comprises a control assembly, and the top of the control assembly is fixedly connected with an opening assembly. According to the minimally invasive surgery distraction device, the stability and controllability of wound distraction are successfully achieved, the stability and safety of the whole surgery process are ensured through the fine mechanical linkage design of the minimally invasive surgery distraction device, the capacity of easily adjusting the distraction amplitude according to the surgery requirement is endowed to medical workers through the innovative structural design of the device, and the medical workers can conveniently and rapidly distraction the wound. Therefore, the device adapts to various wounds with different sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a minimally invasive surgical distraction device. Background Art

[0002] Minimally invasive surgery, as the name suggests, is an advanced medical method that performs surgical treatment through tiny incisions. Compared with traditional surgical methods, minimally invasive surgery is highly favored for its many advantages, such as less trauma, faster recovery, and less pain felt by patients. During minimally invasive surgery, distraction devices play a vital role. This device can effectively help doctors expand the surgical field of view, thereby ensuring the accuracy and safety of surgical operations. The minimally invasive surgical distraction device involved in the present invention is carefully designed to address the problems existing in the existing technology, aiming to further improve the effectiveness and safety of minimally invasive surgery and bring patients a better treatment experience.

[0003] According to patent document CN114795335A, a minimally invasive surgery incision distraction device is disclosed, belonging to the field of minimally invasive surgery technology, comprising a C-shaped distraction ring, a positioning mechanism slidably connected to the surface of the C-shaped distraction ring, a wound distraction adjustment device fixedly connected to the surface of the positioning mechanism, a wound distraction adjustment device fixedly connected to the inner end of the wound distraction adjustment device, a fixed block disposed above the C-shaped distraction ring, a limit block slidably connected to the inner wall of the fixed block, a pull rod fixedly connected to the upper surface of the limit block, and a slide groove formed in the side wall of the limit block. A fixed block is disposed on the upper surface of a slider that slides on the surface of the C-shaped distraction ring, the limit block is connected to the pull rod and slides up and down inside the fixed block, a limit gear is engaged in a limit groove formed on the lower surface of the limit block, and the limit gear is connected to a positioning gear meshed in a gear groove formed on the surface of the C-shaped distraction ring via a linkage rod, thereby facilitating the control of the fixing and sliding of the fixed block on the surface of the C-shaped distraction ring.

[0004] During minimally invasive surgery, doctors usually use distraction devices to expand tissues in order to clearly reveal the surgical area. However, the distraction devices currently on the market still have some unsatisfactory aspects in actual use. For example, the operation process of these devices is often complicated and requires doctors to have certain skills and experience; in addition, they also lack stability, which may cause unnecessary shaking during surgery; and the pressure of these devices on tissues is often not uniform, which may not only cause damage to the tissues, but also affect the accuracy of the surgery. The existence of these problems may not only reduce the overall effect of the surgery, but also cause additional pain to the patient and even increase the risk during the operation. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a minimally invasive surgical distraction device. The technical problem to be solved by the present invention is that the distraction device still has some shortcomings when used, such as complex operation, insufficient stability, uneven pressure on tissues, etc. These problems not only affect the surgical effect, but may also increase the patient's pain and surgical risks.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A minimally invasive surgical distraction device comprises a C-shaped guide base plate, the top of which is movably connected to a distraction mechanism;

[0008] The C-shaped guide base includes a C-shaped guide base body, a C-shaped guide rail is fixedly connected to the middle of the top of the C-shaped guide base body, and a plurality of positioning grooves are provided on one side of the top of the C-shaped guide base body outside the C-shaped guide rail;

[0009] The expansion mechanism includes a control component, and the top of the control component is fixedly connected to the expansion component.

[0010] As a further solution of the present invention: the control component includes a slider, a bottom groove is opened at the bottom of the slider, a top groove is opened at the top middle part of the slider, the slider is slidably connected to the outer wall of the C-shaped slide rail through the bottom groove opened at the bottom, the right side of the slider is fixedly connected to the side plate, the inner wall of the side plate is threadedly connected to the screw rod, the right end of the screw rod extends to the right side of the outer wall of the side plate and is fixedly connected to the turntable, and the right side of the turntable is fixedly connected to the handle.

[0011] As a further solution of the present invention: a positioning rod connecting block is fixedly connected to the middle of the bottom right side of the slider, a positioning rod guide groove is opened on the top left side of the positioning rod connecting block and extends to the bottom, a spring positioning rod is slidably connected to the inner wall of the positioning rod guide groove opened by the positioning rod connecting block, the top of the spring positioning rod is fixedly connected to a T-shaped connecting plate, the front and rear sides of the top of the T-shaped connecting plate are fixedly connected to a stop block, and the tops of the two stops are both beveled surfaces.

[0012] As a further solution of the present invention: the expansion assembly includes an expansion assembly body, and an expansion control assembly is provided on the inner side of the expansion assembly body.

[0013] As a further solution of the present invention: the main body of the expansion component includes an irregular connecting block, the front and rear sides of the right side of the T-shaped connecting plate are fixedly connected with guide side plates, the outer sides of the two guide side plates are provided with sliding grooves, the left and right sides of the top and bottom of the two guide side plates are fixedly connected with guide cross bar connecting blocks, the inner sides of the two groups of guide cross bar connecting blocks at the top and bottom are fixedly connected with guide cross bars, and the bottoms of the two guide side plates are fixedly connected to the front and rear sides of the top of the control component.

[0014] As a further solution of the present invention: the front and rear sides of the top and bottom of the irregular connecting block are fixedly connected with slide slot oblique rods, the top and bottom of the irregular connecting block are rotatably connected with gears on both sides of the inner side of the two groups of slide slot oblique rods, and the inner walls of the two groups of slide slot oblique rods at the top and bottom are slidably connected with L-shaped expansion oblique rods.

[0015] As a further solution of the present invention: the inner sides of the top and bottom groups of L-shaped expanding diagonal rods are fixedly connected with racks, the inner sides of the top and bottom groups of L-shaped expanding diagonal rods are meshed with the outer walls of the two groups of gears through racks, the middle parts of the top and bottom groups of L-shaped expanding diagonal rods are slidingly connected, the left sides of the inner sides of the top and bottom groups of L-shaped expanding diagonal rods are fixedly connected with semicircular expansion plates, and a second semicircular expansion plate is provided on the right side of the inner sides of the two semicircular expansion plates.

[0016] As a further solution of the present invention: the expansion control assembly includes a moving block, the middle inner wall of the moving block is fixedly connected to a columnar push-pull rod, the right end of the columnar push-pull rod extends to the right side of the moving block and is fixedly connected to the moving rod, the outer wall of the moving block is slidably connected to the inner side of the two guide side plates, the front and rear sides of the moving rod are extended to the outer side of the two guide side plates through the sliding grooves opened by the two guide side plates and the bottom is fixedly connected to an inverted L-shaped support rod, and the bottom of the two inverted L-shaped support rods is provided with a cross-section with an inclination opposite to that of the top of the two support blocks.

[0017] As a further solution of the present invention: the left end of the columnar push-pull rod is fixedly connected to a vertical connecting rod, the top and bottom of the vertical connecting rod both extend to the inner walls of the two guide cross bars and are fixedly connected to a bidirectional rack rod.

[0018] As a further solution of the present invention: the left sides of the outer walls of the two bidirectional rack rods are engaged with the outer walls of the two sets of gears at the top and bottom, the middle part of the right side of the movable rod is rotatably connected to the left end of the screw rod, and the left sides of the two bidirectional rack rods are fixedly connected to the right side of the second semicircular support plate.

[0019] The beneficial effects of the present invention are:

[0020] The present invention is provided with a C-shaped guide base plate and a distraction mechanism. The minimally invasive surgical distraction device successfully achieves smooth and controllable wound distraction. Through its sophisticated mechanical linkage design, the stability and safety of the entire surgical process are ensured. The innovative structural design of the device gives medical staff the ability to easily adjust the distraction amplitude according to surgical needs, thereby adapting to wounds of various sizes. This feature significantly improves the flexibility and adaptability of the operation. At the same time, the device realizes the simultaneous contraction and expansion of the semicircular distraction plate and the second semicircular distraction plate through a simple structural design, effectively solving the problems of complex traditional operation, insufficient stability and uneven tissue compression. In addition, through the ingenious cooperation of the spring positioning rod and the positioning groove, the distraction mechanism is firmly fixed, effectively avoiding shaking or displacement during the operation, and providing a strong guarantee for the smooth progress of the operation. Overall, the minimally invasive surgical distraction device of the present invention has brought new technological breakthroughs to the field of minimally invasive surgery and is expected to play an important role in future clinical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the main body three-dimensional separation structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the C-shaped guide base plate of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the expansion mechanism of the present invention;

[0025] Figure 5 This is a schematic diagram of the three-dimensional separation structure of the expansion mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional separation structure of the control component of the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the support assembly of the present invention;

[0028] Figure 8 This is a schematic diagram of the three-dimensional separation structure of the support assembly of the present invention;

[0029] Figure 9 This is a schematic diagram of the three-dimensional separation structure of the main body of the support component of the present invention;

[0030] Figure 10 It is a schematic diagram of the three-dimensional structure of the expansion control component of the present invention.

[0031] In the figure: 1. C-shaped guide base plate; 11. C-shaped guide base plate body; 12. C-shaped slide rail; 13. Positioning groove; 2. Opening mechanism; 21. Control assembly; 211. Slider; 212. Positioning rod connecting block; 213. Positioning rod guide groove; 214. Bottom groove; 215. Top groove; 216. Side plate; 217. Screw; 218. Turntable; 219. Turning handle; 2110. Spring positioning rod; 2111. T-shaped connecting plate; 2112. Block; 22. Opening assembly; 221. Opening assembly body; 2211. Irregular The connecting block; 2212, the slideway diagonal rod; 2213, the gear; 2214, the L-shaped expansion diagonal rod; 2215, the rack; 2216, the semicircular expansion plate; 2217, the second semicircular expansion plate; 2218, the guide side plate; 2219, the guide cross bar connecting block; 22110, the guide cross bar; 22111, the slideway; 222, the expansion control assembly; 2221, the moving block; 2222, the columnar push-pull rod; 2223, the vertical connecting rod; 2224, the two-way rack rod; 2225, the moving rod; 2226, the inverted L-shaped support rod. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0033] like Figure 1 As shown, the present invention provides a minimally invasive surgical distraction device, comprising a C-shaped guide base plate 1 , the top of which is movably connected to a distraction mechanism 2 .

[0034] like Figure 2-10As shown, the C-shaped guide base plate 1 includes a C-shaped guide base plate body 11, a C-shaped guide rail 12 is fixedly connected to the middle of the top of the C-shaped guide base plate body 11, and a plurality of positioning grooves 13 are provided on the side of the top of the C-shaped guide base plate body 11 on the outer side of the C-shaped guide rail 12. The expansion mechanism 2 includes a control component 21, and the top of the control component 21 is fixedly connected to the expansion component 22. The control component 21 includes a slider 211, and a bottom groove 214 is provided at the bottom of the slider 211. A top groove 215 is provided at the middle of the top of the slider 211. The slider 211 is slidably connected to the outer wall of the C-shaped slide rail 12 through the bottom groove 214 provided at the bottom. The right side of the slider 211 is fixedly connected to a side plate 216, and the inner wall of the side plate 216 is threadedly connected to a screw rod 217. The screw rod The right end of 217 extends to the right side of the outer wall of the side plate 216 and is fixedly connected to a turntable 218. The right side of the turntable 218 is fixedly connected to a handle 219. The middle part of the bottom right side of the slider 211 is fixedly connected to a positioning rod connecting block 212. A positioning rod guide groove 213 is provided on the top left side of the positioning rod connecting block 212, which runs through the bottom. The inner wall of the positioning rod guide groove 213 provided by the positioning rod connecting block 212 is slidably connected to a spring positioning rod 2110. The top of the spring positioning rod 2110 is fixedly connected to a T-shaped connecting plate 2111. The front and rear sides of the top of the T-shaped connecting plate 2111 are fixedly connected to a stop block 2112. The tops of the two stop blocks 2112 are both beveled. The expansion component 22 includes an expansion component body 221. The expansion component body The inner side of 221 is provided with an expansion control component 222, and the expansion component body 221 includes an irregular connecting block 2211. The front and rear sides of the right side of the T-shaped connecting plate 2111 are fixedly connected with a guide side plate 2218. The outer sides of the two guide side plates 2218 are provided with a slide groove 22111. The left and right sides of the top and bottom of the two guide side plates 2218 are fixedly connected with a guide cross bar connecting block 2219. The inner sides of the two sets of guide cross bar connecting blocks 2219 at the top and bottom are fixedly connected with a guide cross bar 22110. The bottoms of the two guide side plates 2218 are fixedly connected to the front and rear sides of the top of the control component 21. The front and rear sides of the top and bottom of the irregular connecting block 2211 are fixedly connected with a slide groove oblique rod 2212. The top and bottom of 211 are rotatably connected to gears 2213 on both sides of the inner sides of the two groups of sliding groove oblique rods 2212. The inner walls of the top and bottom groups of sliding groove oblique rods 2212 are slidably connected to L-shaped expansion oblique rods 2214. The inner sides of the top and bottom groups of L-shaped expansion oblique rods 2214 are fixedly connected to racks 2215. The inner sides of the top and bottom groups of L-shaped expansion oblique rods 2214 are meshed with the outer walls of the two groups of gears 2213 through racks 2215. The middle parts of the top and bottom groups of L-shaped expansion oblique rods 2214 are slidably connected. The left sides of the inner sides of the top and bottom groups of L-shaped expansion oblique rods 2214 are fixedly connected to semicircular expansion plates 2216. A second semicircular expansion plate 2217 is provided on the right sides of the inner sides of the two semicircular expansion plates 2216.The expansion control assembly 222 includes a moving block 2221, the inner wall of the middle of the moving block 2221 is fixedly connected to a columnar push-pull rod 2222, the right end of the columnar push-pull rod 2222 extends to the right side of the moving block 2221 and is fixedly connected to a moving rod 2225, the outer wall of the moving block 2221 is slidably connected to the inner side of the two guide side plates 2218, the front and rear sides of the moving rod 2225 are extended to the outer side of the two guide side plates 2218 through the sliding grooves 22111 opened by the two guide side plates 2218 and the bottom is fixedly connected to an inverted L-shaped support rod 2226, the bottom of the two inverted L-shaped support rods 2226 A section with an inclination opposite to that of the tops of the two resisting blocks 2112 is opened at the top. The left end of the columnar push-pull rod 2222 is fixedly connected to a vertical connecting rod 2223. The top and bottom of the vertical connecting rod 2223 both extend to the inner walls of the two guide cross bars 22110 and are fixedly connected to two-way rack rods 2224. The left sides of the outer walls of the two two-way rack rods 2224 are meshed with the outer walls of the top and bottom sets of gears 2213. The middle right side of the moving rod 2225 is rotatably connected to the left end of the screw rod 217. The left sides of the two two-way rack rods 2224 are fixedly connected to the right side of the second semicircular support plate 2217.

[0035] When the wound needs to be expanded during minimally invasive surgery, first stick a medical double-sided tape on the bottom of the C-shaped guide base body 11 and adhere the C-shaped guide base 1 as a whole around the wound. Then the staff rotates the expansion mechanism 2 as a whole to slide left and right on the C-shaped slide rail 12 until the expansion mechanism 2 is adjusted to a position that does not affect the medical staff's surgery. Then turn the handle 219, and the handle 219 drives the turntable 218 to rotate. The turntable 218 drives the screw rod 217 to rotate on the inner wall of the side plate 216. The rotation of the screw rod 217 then moves to the right on the inner wall of the side plate 216, and drives the moving rod 2225 to move to the right. The moving rod 2225 drives the columnar push-pull rod 2222 and the moving block 2221 to move. The columnar push-pull rod 2222 drives the vertical connecting rod 2223 to move, and the vertical connecting rod 2223 drives the two-way gear The bar 2224 moves to the right on the inner wall of the guide cross bar 22110, and the movement of the two-way rack bar 2224 drives the top and bottom two sets of gears 2213 to rotate. The rotation of the gear 2213 engages the rack 2215 to drive the L-shaped expansion and contraction inclined rod 2214 to slide to the left on the inner wall of the slide slot inclined rod 2212. The L-shaped expansion and contraction inclined rod 2214 drives the semicircular expansion plate 2216 to move outward, thereby expanding the wound. At the same time as the two two-way rack bars 2224 move to the right, the second semicircular expansion plate 2217 moves to the right, so that the semicircular expansion plate 2216 and the second semicircular expansion plate 2217 expand outward synchronously inside the wound. The whole process is smooth and controllable, ensuring the accuracy and safety of the operation. The expansion amplitude can be adjusted by the moving distance of the screw rod 217 to meet the needs of wounds of different sizes.

[0036] When the screw rod 217 drives the moving rod 2225 to move to the right through its rotational motion, the two inverted L-shaped supporting rods 2226 will also move to the right synchronously with this action. This process will continue until the oblique cut surfaces of the two supporting blocks 2112 are in close contact with the bottom cut surfaces of the two inverted L-shaped supporting rods 2226 and conflict with each other. After this contact point is reached, the two supporting blocks 2112 will begin to move downward due to the resistance force exerted by the oblique cut inverted L-shaped supporting rods 2226. As the supporting blocks 2112 move downward, they will drive the spring positioning rod 2110 along the positioning rod guide groove 2 The inner wall of 13 slides downward, and this sliding action enables the spring positioning rod 2110 to be smoothly snapped into the inner wall of the positioning groove 13 specially opened in the C-shaped guide base body 11. In this way, the snapping action of the spring positioning rod 2110 effectively fixes the position of the expansion mechanism 2. Such a fixing measure is crucial to the surgical process because it can prevent the expansion mechanism from unnecessary shaking or displacement during the operation. By ensuring the stability of the expansion mechanism, the stability and safety of the operation are significantly improved, thereby providing patients with a safer and more reliable surgical experience.

[0037] The working principle of the present invention is as follows: when the wound needs to be expanded during minimally invasive surgery, a medical double-sided tape is firstly pasted on the bottom of the C-shaped guide base body 11 and the C-shaped guide base 1 is adhered around the wound as a whole. Then, the staff rotates the expansion mechanism 2 as a whole to slide left and right on the C-shaped slide rail 12 until the expansion mechanism 2 is adjusted to a position that does not affect the operation of the medical staff. Then, the turning handle 219 is turned, and the turning handle 219 drives the turntable 218 to rotate. The turntable 218 drives the screw rod 217 to rotate on the inner wall of the side plate 216. The rotation of the screw rod 217 further rotates the side plate 216. The inner wall of the guide cross bar 22110 moves to the right, and drives the moving rod 2225 to move to the right, the moving rod 2225 drives the columnar push-pull rod 2222 and the moving block 2221 to move, the columnar push-pull rod 2222 drives the vertical connecting rod 2223 to move, the vertical connecting rod 2223 drives the two-way rack rod 2224 to move to the right on the inner wall of the guide cross bar 22110, the movement of the two-way rack rod 2224 drives the top and bottom two sets of gears 2213 to rotate, the rotation of the gear 2213 engages the rack 2215 to drive the L-shaped expansion and contraction diagonal rod 2214 to move in the inner part of the slide slot diagonal rod 2212 The wall slides to the left, and the L-shaped expansion inclined rod 2214 drives the semicircular expansion plate 2216 to move outward, thereby expanding the wound, and while the two bidirectional rack rods 2224 move to the right, the second semicircular expansion plate 2217 moves to the right, so that the semicircular expansion plate 2216 and the second semicircular expansion plate 2217 expand outward synchronously inside the wound. The whole process is smooth and controllable, ensuring the accuracy and safety of the operation, and the expansion amplitude can be adjusted by the moving distance of the screw rod 217 to adapt to the needs of wounds of different sizes. When 2225 moves to the right, the two inverted L-shaped supporting rods 2226 move to the right together until the oblique cut surfaces of the two supporting blocks 2112 and the bottom cut surfaces of the two inverted L-shaped supporting rods 2226 conflict with each other. At this time, the two supporting blocks 2112 move downward under the resistance force of the oblique cut inverted L-shaped supporting rods 2226, and the two supporting blocks 2112 drive the spring positioning rod 2110 to slide downward on the inner wall of the positioning rod guide groove 213, thereby making the spring positioning rod 2110 stuck in the inner wall of the positioning groove 13 opened by the C-shaped guide base plate body 11, thereby fixing the position of the expansion mechanism 2.

[0038] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A minimally invasive surgical distraction device, characterized by: It comprises a C-shaped guide base plate (1), the top of which is movably connected to a spreading mechanism (2); The C-shaped guide base plate (1) comprises a C-shaped guide base plate body (11), a C-shaped slide rail (12) is fixedly connected to the middle of the top of the C-shaped guide base plate body (11), and a plurality of positioning grooves (13) are provided on one side of the top of the C-shaped guide base plate body (11) outside the C-shaped slide rail (12); The expansion mechanism (2) comprises a control component (21), and the top of the control component (21) is fixedly connected to an expansion component (22).

2. The minimally invasive surgical distraction device according to claim 1, characterized in that: The control assembly (21) includes a slider (211), a bottom groove (214) is provided at the bottom of the slider (211), a top groove (215) is provided at the middle of the top of the slider (211), the slider (211) is slidably connected to the outer wall of the C-shaped slide rail (12) through the bottom groove (214) provided at the bottom, the right side of the slider (211) is fixedly connected to a side plate (216), the inner wall of the side plate (216) is threadedly connected to a screw rod (217), the right end of the screw rod (217) extends to the right side of the outer wall of the side plate (216) and is fixedly connected to a turntable (218), and the right side of the turntable (218) is fixedly connected to a turning handle (219).

3. The minimally invasive surgical distraction device according to claim 2, characterized in that: A positioning rod connecting block (212) is fixedly connected to the middle of the bottom right side of the slider (211), a positioning rod guide groove (213) is provided on the left side of the top of the positioning rod connecting block (212) and extends to the bottom, a spring positioning rod (2110) is slidably connected to the inner wall of the positioning rod guide groove (213) provided by the positioning rod connecting block (212), the top of the spring positioning rod (2110) is fixedly connected to a T-shaped connecting plate (2111), and the front and rear sides of the top of the T-shaped connecting plate (2111) are fixedly connected to the support blocks (2112), and the tops of the two support blocks (2112) are both beveled.

4. The minimally invasive surgical distraction device according to claim 2, characterized in that: The expansion component (22) comprises an expansion component body (221), and an expansion control component (222) is provided on the inner side of the expansion component body (221).

5. The minimally invasive surgical distraction device according to claim 4, characterized in that: The main body (221) of the expansion component comprises an irregular connecting block (2211), the front and rear sides of the right side of the T-shaped connecting plate (2111) are fixedly connected to guide side plates (2218), the outer sides of the two guide side plates (2218) are provided with sliding grooves (22111), the left and right sides of the top and bottom of the two guide side plates (2218) are fixedly connected to guide crossbar connecting blocks (2219), the inner sides of the two groups of guide crossbar connecting blocks (2219) at the top and bottom are fixedly connected to guide crossbars (22110), and the bottoms of the two guide side plates (2218) are fixedly connected to the front and rear sides of the top of the control component (21).

6. The minimally invasive surgical distraction device according to claim 5, characterized in that: The irregular connection block (2211) is fixedly connected to the front and rear sides of the top and bottom of the irregular connection block (2211) with a sliding groove inclined rod (2212). The top and bottom of the irregular connection block (2211) are rotatably connected to the two sides of the inner side of the two groups of sliding groove inclined rods (2212) with gears (2213). The inner walls of the two groups of sliding groove inclined rods (2212) at the top and bottom are slidably connected with L-shaped expansion inclined rods (2214).

7. The minimally invasive surgical distraction device according to claim 6, characterized in that: The inner sides of the two groups of L-shaped expanding and diagonal rods (2214) at the top and bottom are fixedly connected with racks (2215), the inner sides of the two groups of L-shaped expanding and diagonal rods (2214) at the top and bottom are meshed with the outer walls of the two groups of gears (2213) through the racks (2215), the middle parts of the two groups of L-shaped expanding and diagonal rods (2214) at the top and bottom are slidably connected, the left sides of the inner sides of the two groups of L-shaped expanding and diagonal rods (2214) at the top and bottom are fixedly connected with semicircular expansion plates (2216), and a second semicircular expansion plate (2217) is provided on the right sides of the inner sides of the two semicircular expansion plates (2216).

8. The minimally invasive surgical distraction device according to claim 4, characterized in that: The expansion control assembly (222) includes a moving block (2221), the inner wall of the middle part of the moving block (2221) is fixedly connected to a columnar push-pull rod (2222), the right end of the columnar push-pull rod (2222) extends to the right side of the moving block (2221) and is fixedly connected to a moving rod (2225), the outer wall of the moving block (2221) is slidably connected to the inner side of the two guide side plates (2218), the front and rear sides of the moving rod (2225) are extended to the outer side of the two guide side plates (2218) through the sliding grooves (22111) opened by the two guide side plates (2218) and the bottom is fixedly connected to an inverted L-shaped support rod (2226), and the bottom of the two inverted L-shaped support rods (2226) is provided with a cross-section with an inclination opposite to that of the top of the two support blocks (2112).

9. The minimally invasive surgical distraction device according to claim 8, characterized in that: The left end of the columnar push-pull rod (2222) is fixedly connected to a vertical connecting rod (2223), and the top and bottom of the vertical connecting rod (2223) both extend to the inner walls of the two guide cross bars (22110) and are fixedly connected to a bidirectional rack rod (2224).

10. The minimally invasive surgical distraction device according to claim 9, characterized in that: The left sides of the outer walls of the two bidirectional rack rods (2224) are engaged with the outer walls of the top and bottom sets of gears (2213), the middle part of the right side of the moving rod (2225) is rotatably connected to the left end of the screw rod (217), and the left sides of the two bidirectional rack rods (2224) are fixedly connected to the right side of the second semicircular support plate (2217).

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