Expander for bone

Abstract

The invention relates to the field of dilators, and discloses a bone dilator which comprises a bed body, a first vertical plate and a second vertical plate, two cross beams are connected between bed legs of the bed body, each cross beam is movably sleeved with a transverse seat, the transverse seats are provided with the first vertical plate and the second vertical plate through a first overturning structure, and the first vertical plate and the second vertical plate are arranged on the first vertical plate and the second vertical plate through a second overturning structure. The first vertical plate and the second vertical plate are distributed on the front side and the rear side of the bed body, a transverse plate is arranged at the top end of the first vertical plate through a second turnover structure, the first vertical plate and the second vertical plate are arranged on a cross beam of the bed body through two first turnover structures, the transverse plate is arranged at the top end of the first vertical plate through a second turnover structure, and an expansion structure is arranged on the transverse plate. In this way, the transverse plate can be overturned and folded to the first vertical plate, the folded first vertical plate, the folded transverse plate and the folded second vertical plate can be folded and stored to the bed body, operation is easy and convenient, the dilator can be reasonably stored, and the situation that the dilator occupies the limited space in a ward when stored is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of expanders, and in particular to a bone expander. Background Art

[0002] Dilators are common medical devices, usually made of polymer materials such as metal or plastic, with adjustable size. Doctors can insert them into narrow cavities or organs and then adjust the size of the dilator by inflation or twisting to expand and maintain the tissue or organ at the surgical site. Dilators are often used in orthopedic treatments.

[0003] In the prior art, the expander is pulled in the opposite direction of the adjustment plate by the pull plate, so that the movable plate drives the cylindrical member to separate from the movable frame and the adjustment plate through the arc groove, thereby achieving the goal that the operator can adjust the height of the movable frame according to the use requirements when using the movable frame, thereby expanding the application range of the movable frame;

[0004] However, in actual use, first, the expander needs to be moved to the bed by a mobile frame to perform the expansion work, and the mobile frame needs to be fixed at the bed, which is more troublesome to operate. In addition, the expander occupies limited space in the ward when stored. Therefore, there is room for improvement. Summary of the Invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a bone expander.

[0006] The present invention provides a bone expander that adopts the following technical solution:

[0007] A bone expander comprises a bed, a first vertical plate and a second vertical plate, two cross beams connected between the legs of the bed, a cross seat movably sleeved on each cross beam, a first vertical plate and a second vertical plate provided on the cross seat via a first flip structure, the first and second vertical plates being distributed at the front and rear sides of the bed, a cross plate provided at the top of the first vertical plate via a second flip structure, an expansion structure provided on the cross plate via a longitudinal adjustment structure, and a second positioning structure provided at the top of the second vertical plate for positioning the cross plate;

[0008] The first flip structure includes two fan-shaped plates arranged on the transverse seat, the two fan-shaped plates rotate through the first rotating shaft, a disk is fixedly sleeved in the middle of the first rotating shaft, a first fixing block is installed on the side of the disk, a third flip structure is arranged between the first fixing block and the first vertical plate, and a first positioning structure is arranged between the disk and the fan-shaped plates;

[0009] The second flip structure includes a first opening at the top of the first vertical plate, a second rotating shaft rotates through the first opening, a second fixed block is fixedly sleeved on the middle of the second rotating shaft, the rear end of the second fixed block is rotatably connected to the rotating column, and the rear end of the rotating column is fixedly connected to the horizontal plate.

[0010] Preferably, the expansion structure includes a first fixed frame arranged on the horizontal plate, a first groove is opened in the middle of the lower side of the first fixed frame, a first vertical bar is movably inserted into the middle of the lower inner wall of the first fixed frame, a first screw is rotatably inserted into the threaded groove in the middle of the top of the first vertical bar, the first screw is rotatably connected to the upper inner wall of the first fixed frame, a first turntable is fixedly mounted on the first screw, the bottom end of the first vertical bar is connected to a transmission bar passing through the first groove, a third rotating shaft is rotated through the two sides in the first groove, a gear is fixedly mounted in the middle of the third rotating shaft, teeth meshing with the gear are arranged on both sides of the transmission bar, an expansion bar is fixedly mounted near both ends on the third rotating shaft, and an expansion sheet is arranged at the bottom end of the expansion bar.

[0011] Preferably, the first positioning structure includes a through groove provided on the disc, an inner block is movably inserted into the through groove, both ends of the inner block are fitted on the fan-shaped plate, a clamping rod is connected to the front and rear ends of the inner block, a first spring is connected between the upper surface of the inner block and the groove wall on one side of the through groove, an arc groove is provided on the fan-shaped plate, two radial grooves are provided on the fan-shaped plate, the two radial grooves are respectively connected to the two ends of the arc groove, the clamping rod is clamped in one of the arc grooves, the clamping rod passes through one end of the fan-shaped plate and is connected to the pull block, and the pull block is fitted on the fan-shaped plate.

[0012] Preferably, the third flipping structure includes a square block installed in the middle of the first fixed block, the middle of the square block is fixedly connected to the second connecting block, the bottom end of the first vertical plate is connected to the second fixed frame, the middle of the bottom of the second fixed frame is fixedly connected to the first connecting block, the first connecting block and the second connecting block are rotatably connected, and a positioning frame is installed at the bottom end of the second fixed frame, and the positioning frame is movably mounted on the square block.

[0013] Preferably, the second positioning structure includes an adjusting cylinder fixedly connected to the rear end of the horizontal plate, one end of the adjusting cylinder is rotatably connected to the fourth fixed block, an angle adjustment structure is arranged between the fourth fixed block and the adjusting cylinder, a second opening is provided at the top of the second vertical plate, and the left and right inner walls of the second opening are movable through the card blocks, and the card blocks are inserted into the card slots provided on the fourth fixed block, and the two card blocks are connected to the second vertical bar on the side away from each other below, and the two second vertical bars are connected to the insertion bar at the bottom end of one side close to each other, a second groove is provided on the second vertical plate for the insertion bar to be inserted into the second groove, and one end of the insertion bar is connected to the limit block, and a driving structure is provided between the second vertical bar and the corresponding pull block.

[0014] Preferably, the driving structure includes a first driving bar connected to the bottom end of the second vertical bar, and each of the first driving bars is provided with a first driving groove near the bottom end. The corresponding pulling blocks are connected with driving rods near both ends, and the top end of the driving rods is movably inserted into the first driving groove.

[0015] Preferably, the angle adjustment structure includes a second screw that rotates through, a second turntable is fixedly mounted on one end of the second screw, a first limit plate is fixedly connected to one end of the inner wall of the adjusting cylinder, a first sleeve is interactively mounted on the first limit plate, the first limit plate and the end face of the first sleeve are square-shaped, a threaded groove is provided on one end face of the first sleeve for the second screw to rotate through, an insertion rod is connected to the lower side of the first sleeve near the fourth fixed block, a transverse groove is provided on the inner wall of the adjusting cylinder near the insertion rod, a first adjusting groove connecting one end of the transverse groove is provided on the adjusting cylinder, and a second adjusting groove connecting the other end of the transverse groove is provided on the adjusting cylinder.

[0016] Preferably, the longitudinal adjustment structure includes a longitudinal groove opened on the transverse plate along its length direction, a longitudinal seat is slidably arranged in the longitudinal groove, the longitudinal seat is installed on the first fixed frame, and a handle is provided on the longitudinal seat through a third positioning structure.

[0017] Preferably, the third positioning structure includes a second limit plate connected to the middle part of the longitudinal seat, a second sleeve is movably mounted on the top of the second limit plate, the top of the second sleeve is installed on the handle, a second spring is mounted on the second limit plate, and both ends of the second spring are respectively connected to the longitudinal seat and the second sleeve, and the upper edges of the left and right sides of the horizontal plate are connected to longitudinal bars, and a plurality of positioning grooves are opened on the longitudinal bars at equal intervals, and guide grooves are opened in the middle of the left and right sides of the longitudinal seat. A second driving bar is slidably arranged in the guide groove, and the second driving bar is connected to the positioning block at the bottom end of one side of the second limit plate, and the positioning block is movably inserted into the positioning groove of the corresponding position, and a second driving groove is opened on the second driving bar, and the second sleeve is connected to a driving frame that can movably pass through the second driving groove.

[0018] In summary, the present invention has the following beneficial technical effects:

[0019] 1. The present invention provides a first vertical plate and a second vertical plate on the crossbeam of the bed through two sets of first flip structures. A cross plate is provided on the top of the first vertical plate through the second flip structure. An expansion structure is provided on the cross plate. In this way, the cross plate can be flipped and folded onto the first vertical plate. The folded first vertical plate and the cross plate as a whole, as well as the second vertical plate, can also be folded and stored on the bed. This is not only simple and convenient to operate, but also allows the expander to be stored reasonably, avoiding occupying the limited space in the ward when the expander is stored.

[0020] 2. The present invention provides a first positioning structure and a second positioning structure, so that when the first and second vertical plates are rotated on the crossbeam, the first positioning structure can be used to position the rotated first and second vertical plates, and the second positioning structure can be used to position one end of the rotated cross plate to the top of the second vertical plate. In this way, the unfolded first and second vertical plates and the cross plate can be fixed on the bed body as a whole, ensuring stability during expansion work;

[0021] 3. The present invention is provided with a driving structure, so that when the first positioning structure positions the second vertical plate, the driving structure can simultaneously drive the second positioning structure to automatically position the horizontal plate, making the operation more labor-saving and convenient;

[0022] 4. The present invention is provided with a third flip structure. After the horizontal plate and the first vertical plate are rotated downward, the third flip structure can directly rotate the first vertical plate, the horizontal plate and the expansion structure as a whole under the bed body for storage. Medical staff will not be injured by accidentally colliding with the stored expansion structure during work.

[0023] 5. The present invention provides a longitudinal adjustment structure and an angle adjustment structure. During expansion, the position of the expansion structure can be flexibly adjusted along the width direction of the bed. The expansion angle can also be flexibly adjusted through the angle adjustment structure, which makes it more convenient to use. In addition, a third positioning structure is provided to position the expansion structure on the transverse plate after the expansion position is adjusted longitudinally. The angle adjustment structure can automatically position itself after adjusting the angle of the expansion structure, thereby avoiding positional displacement of the expansion structure during expansion and improving the quality of the expansion work. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a bone expander according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic structural diagram of the embodiment of the present invention after the bed is disassembled;

[0026] Figure 3 In the embodiment of the present invention Figure 2 A magnified view of the structure at point A;

[0027] Figure 4 This is a schematic structural diagram of the horizontal plate in an embodiment of the present invention;

[0028] Figure 5 In the embodiment of the present invention Figure 4 A magnified view of the structure at point B;

[0029] Figure 6 In the embodiment of the present invention Figure 4 A magnified view of the structure at C;

[0030] Figure 7is a structural diagram of the angle adjustment structure in an embodiment of the present invention;

[0031] Figure 8 is a structural diagram of the second vertical plate in an embodiment of the present invention;

[0032] Figure 9 In the embodiment of the present invention Figure 8 Enlarged view of the structure at point D.

[0033] Explanation of the accompanying symbols: 1. bed body; 2. crossbeam; 3. transverse seat; 4. first vertical plate; 5. cross plate; 6. second vertical plate; 7. fan-shaped plate; 8. first rotating shaft; 9. disc; 10. first fixed block; 11. first opening; 12. second rotating shaft; 13. second fixed block; 14. rotating column; 15. first fixed frame; 16. first groove; 17. first vertical bar; 18. first screw; 19. first turntable; 20. transmission bar; 21. third rotating shaft; 22. expansion bar; 23. expansion sheet; 24. gear; 25. through groove; 26. inner block; 27. clamping rod; 28. pull block; 29. arc groove; 30. radial groove; 31. first spring; 32. first connecting block; 33. second connecting block; 34. square block; 35. second fixed frame; 36. second connecting block; 37. second connecting block; 38. second connecting block; 39. second connecting block; 40. second connecting block; 41. first connecting block; 42. first connecting block; 43. second connecting block; 44. second connecting block; 45. first connecting block; 46. first connecting block; 47. first connecting block; 48. first connecting block; 49. first connecting block; 50. first connecting block; 51. first connecting block; 52. first connecting block; 53. first connecting block; 54. first connecting block; 55. first connecting block; 56. first connecting block; 57. first connecting block; 58. first connecting block; 59. first connecting block; 60. first connecting block; 61. first connecting block; 62. first connecting block; 63. first connecting block; 64. first connecting block; 65. first connecting block; 66. first connecting block; 67 6. Positioning frame; 37. Adjusting cylinder; 38. Fourth fixing block; 39. Slot; 40. Second opening; 41. Block; 42. Second vertical bar; 43. Second groove; 44. Insert bar; 45. Limit block; 46. First drive bar; 47. First drive bar; 48. Drive rod; 49. Second screw; 50. Second turntable; 51. Transverse groove; 52. First adjusting groove; 53. Insert rod; 54. Second adjusting groove; 55. First sleeve; 56. First limit plate; 57. Longitudinal groove; 58. Longitudinal seat; 59. Second limit plate; 60. Second sleeve; 61. Handle; 62. Second spring; 63. Guide groove; 64. Second drive bar; 65. Second drive groove; 66. Drive frame; 67. Positioning block; 68. Longitudinal bar; 69. Positioning groove. DETAILED DESCRIPTION

[0034] The following is combined with Figures 1-9 The present invention is described in further detail.

[0035] Reference Figures 1-9 The embodiment of the present invention discloses a bone expander, comprising a bed body 1, a first vertical plate 4 and a second vertical plate 6. Two cross beams 2 are connected between the legs of the bed body 1. A transverse seat 3 is movably provided on each cross beam 2. The first vertical plate 4 and the second vertical plate 6 are provided on the transverse seat 3 through a first flip structure. The first vertical plate 4 and the second vertical plate 6 are distributed at the front and rear sides of the bed body 1. A transverse plate 5 is provided on the top of the first vertical plate 4 through a second flip structure. An expansion structure is provided on the transverse plate 5 through a longitudinal adjustment structure. A second positioning structure for positioning the transverse plate 5 is provided on the top of the second vertical plate 6.

[0036] The first flip structure includes two sector plates 7 arranged on the transverse seat 3. The two sector plates 7 rotate through a first rotating shaft 8. A disc 9 is fixedly sleeved in the middle of the first rotating shaft 8. A first fixing block 10 is installed on the side of the disc 9. A third flip structure is provided between the first fixing block 10 and the first vertical plate 4. A first positioning structure is provided between the disc 9 and the sector plates 7.

[0037] The second flip structure includes a first opening 11 at the top of the first vertical plate 4. A second rotating shaft 12 is rotatably passed through the first opening 11. A second fixing block 13 is fixedly sleeved at the middle of the second rotating shaft 12. The rear end of the second fixing block 13 is rotatably connected to a rotating column 14. The rear end of the rotating column 14 is fixedly connected to the horizontal plate 5.

[0038] The expansion structure includes a first fixed frame 15 arranged on the horizontal plate 5, a first groove 16 is provided in the middle of the lower part of the first fixed frame 15, a first vertical bar 17 is movably inserted into the middle of the lower inner wall of the first fixed frame 15, a first screw 18 is rotated and inserted into the threaded groove in the middle of the top of the first vertical bar 17, the first screw 18 is rotatably connected to the upper inner wall of the first fixed frame 15, a first turntable 19 is fixedly sleeved on the first screw 18, the bottom end of the first vertical bar 17 is connected to the transmission bar 20 passing through the first groove 16, the third rotating shaft 21 is rotated at both sides in the first groove 16, a gear 24 is fixedly sleeved in the middle of the third rotating shaft 21, and teeth meshing with the gear 24 are provided on both sides of the transmission bar 20, an expansion bar 22 is fixedly sleeved near both ends on the third rotating shaft 21, and an expansion piece 2 is provided at the bottom end of the expansion bar 22 3. When storage is needed, the transverse plate 5 can be rotated at the top of the second vertical plate 6, and the transverse plate 5 is flipped upward with the second rotating shaft 12 on the second fixed block 13 as the axis. During the rotation of the transverse plate 5, the transverse plate 5 is rotated a quarter of a turn with the rotating column 14 as the axis. In this way, as the transverse plate 5 continues to flip, the transverse plate 5 can be smoothly folded onto the first vertical plate 4, avoiding the expansion structure from interfering with the folding work between the transverse plate 5 and the first vertical plate 4. Then, with the first rotating shaft 8 as the axis, the disc 9 is rotated, so that the folded transverse plate 5 and the first vertical plate 4 are rotated and stored on the bed body 1 as a whole, and then the second vertical plate 6 is rotated down. In this way, the expander can be directly stored on the bed body 1, which not only can be used in time, but also can be reasonably stored on the bed body 1 to avoid the expander occupying the limited space in the ward.

[0039] See also Figure 1-Figure 4The first positioning structure includes a through slot 25 provided on the disc 9, an inner block 26 is movably inserted into the through slot 25, and both ends of the inner block 26 are attached to the sector plate 7. A clamping rod 27 is connected to both ends of the inner block 26. A first spring 31 is connected between the upper surface of the inner block 26 and the groove wall on one side of the through slot 25. An arc groove 29 is provided on the sector plate 7, and two radial grooves 30 are provided on the sector plate 7. The two radial grooves 30 are respectively connected to the two ends of the arc groove 29. The clamping rod 27 is clamped in one of the arc grooves 29. The clamping rod 27 passes through one end of the sector plate 7 and is connected to the pull block 28. The pull block 28 is attached to the sector plate 7.

[0040] The third flip structure includes a square block 34 installed in the middle of the first fixed block 10, the middle of the square block 34 is fixedly connected to the second connecting block 33, the bottom end of the first vertical plate 4 is connected to the second fixed frame 35, and the middle below the second fixed frame 35 is fixedly connected to the first connecting block 32. The first connecting block 32 and the second connecting block 33 are rotatably connected, and a positioning frame 36 is installed at the bottom end of the second fixed frame 35. The positioning frame 36 is movably sleeved on the square block 34. When the first vertical plate 4 or the second vertical plate 6 is rotated, the card rod 27 is driven to slide in the arc groove 29 of the fan-shaped plate 7. The first spring 31 is in a compressed state. When the first vertical plate 4 or the second vertical plate 6 is rotated to a vertical state, the first spring 31 is in a compressed state. Under the action of force, the card rod 27 is pushed to insert into the radial groove 30 at the corresponding position, so that the rotated first vertical plate 4 or the second vertical plate 6 can be positioned; when the folded first vertical plate 4 and the horizontal plate 5 are rotated down as a whole, the first vertical plate 4 can be pulled to pull the bottom positioning frame 36 of the second fixing frame 35 from the square block 34, thereby releasing the limit between the first vertical plate 4 and the first fixing block 10. In this way, when the first vertical plate 4 is rotated down for storage, the folded first vertical plate 4 and the horizontal plate 5 can be rotated as a whole under the bed body 1 for storage through the rotation between the first connecting block 32 and the second connecting block 33, thereby avoiding the expansion structure on the horizontal plate 5 extending out of the bed body 1 after folding, causing medical staff to be accidentally injured on the expansion structure.

[0041] See also Figure 4 、 Figure 7 、 Figure 8 and Figure 9, the second positioning structure includes an adjusting cylinder 37 fixedly connected to the rear end of the horizontal plate 5, one end of the adjusting cylinder 37 is rotatably connected to the fourth fixed block 38, and an angle adjustment structure is arranged between the fourth fixed block 38 and the adjusting cylinder 37, a second opening 40 is provided at the top of the second vertical plate 6, and the left and right inner walls of the second opening 40 are movable through the card blocks 41, and the card blocks 41 are inserted into the card slots 39 provided on the fourth fixed block 38, and the two card blocks 41 are connected to the second vertical bars 42 on the side away from each other below. The two second vertical bars 42 are connected to the bottom end of one side close to each other, and a second groove 43 is provided on the second vertical plate 6 for the insertion bar 44 to be inserted into. The insertion bar 44 is inserted into the second groove 43 and one end is connected to the limit block 45, and a driving structure is provided between the second vertical bar 42 and the corresponding pull block 28;

[0042] The driving structure includes a first driving bar 46 connected to the bottom end of the second vertical bar 42, and each first driving bar 46 is provided with a first driving groove 47 near the bottom end. The corresponding pull block 28 is connected to a driving rod 48 near both ends. The top end of the driving rod 48 is movably inserted into the first driving groove 47, and the fourth fixed block 38 at one end of the horizontal plate 5 is rotated into the second opening 40 at the top end of the second vertical plate 6. When the corresponding first spring 31 pushes the clamping rod 27 on the inner block 26 to be inserted into the radial groove 30 for positioning, the pull block 28 at one end of the corresponding clamping rod 27 drives one end of the driving rod 48 to slide in the first driving groove 47 on the first driving bar 46. Through the squeezing of the groove wall of the first driving groove 47 by one end of the clamping rod 27, the clamping block 41 on the second vertical bar 42 is pulled to insert into the clamping groove 39 on the fourth fixed block 38, thereby positioning the horizontal plate 5 on the second vertical plate 6.

[0043] See also Figure 4-Figure 8 , the angle adjustment structure includes a second screw 49 that rotates through it, a second turntable 50 is fixedly sleeved on one end of the second screw 49, and a first limit plate 56 is fixedly connected to one end of the inner wall of the adjusting cylinder 37. The first limit plate 56 is interactively sleeved on the first sleeve 55. The first limit plate 56 and the end faces of the first sleeve 55 are square in shape. A threaded groove for the second screw 49 to rotate through is opened on the end face of one end of the first sleeve 55. The lower part of the first sleeve 55 is connected to the insertion rod 53 near the fourth fixed block 38. A transverse groove 51 is opened on the inner wall of the adjusting cylinder 37 near the insertion rod 53. A first adjusting groove 52 communicating with one end of the transverse groove 51 is opened on the adjusting cylinder 37, and a second adjusting groove 54 communicating with the other end of the transverse groove 51 is opened on the adjusting cylinder 37;

[0044] The longitudinal adjustment structure includes a longitudinal groove 57 formed on the transverse plate 5 along its length, a longitudinal seat 58 being slidably disposed in the longitudinal groove 57 , and the longitudinal seat 58 being mounted on the first fixed frame 15 , and a handle 61 being disposed on the longitudinal seat 58 via a second positioning structure;

[0045] The second positioning structure includes a second limiting plate 59 connected to the middle of the longitudinal seat 58, a second sleeve 60 is movably sleeved on the top of the second limiting plate 59, the top of the second sleeve 60 is installed on the handle 61, a second spring 62 is sleeved on the second limiting plate 59, and the two ends of the second spring 62 are respectively connected to the longitudinal seat 58 and the second sleeve 60, the left and right sides of the horizontal plate 5 are connected to the upper edge thereof, and a plurality of positioning grooves 69 are opened on the longitudinal strip 68 at equal intervals, and a guide is opened in the middle of the left and right sides of the longitudinal seat 58. The second driving bar 64 is slidably provided in the guide groove 63, and the second driving bar 64 is connected to the positioning block 67 at the bottom end of the side away from the second limiting plate 59. The positioning block 67 is movably inserted into the positioning groove 69 at the corresponding position. The second driving bar 64 is provided with a second driving groove 65, and the second sleeve 60 is connected with a driving frame 66 that movably passes through the second driving groove 65. When the position of the expansion piece 23 needs to be adjusted during expansion, first, the handle 61 is used to press the second sleeve 60 downward on the second limiting plate 59 to move the second sleeve 60. The second spring 62 is compressed, and the second sleeve 60 that moves downward drives the driving frame 66 to slide downward in the second driving groove 65 on the second driving bar 64. The driving frame 66 squeezes the groove wall of the second driving groove 65, pulling the second driving bar 64 to slide in the guide groove 63, and the positioning block 67 is pulled out from the positioning groove 69 at the corresponding position of the longitudinal bar 68, releasing the positioning of the longitudinal seat 58 on the transverse plate 5, and then using the handle 61 to pull the longitudinal seat 58 to slide in the longitudinal groove 57. According to the actual needs, the bed can be moved along the bed. 1, and when the angle needs to be adjusted, the second screw 49 can be rotated by the second turntable 50 on the fourth fixed block 38. The first sleeve 55 moves on the rotating second screw 49, driving the insertion rod 53 to move along the length direction of the adjustment cylinder 37. The sliding of the insertion rod 53 in the first adjustment slot 52 and the second adjustment slot 54 can drive the adjustment cylinder 37 and the cross plate 5 to rotate as a whole, thereby flexibly adjusting the angle of the expansion piece 23, which is more convenient to use.

[0046] The implementation principle of a bone expander according to an embodiment of the present invention is as follows: when performing orthopedic expansion work, first, according to the needs of the actual situation, the handle 61 is used to press the second sleeve 60 downward on the second limit plate 59 to move, the second spring 62 is compressed, and the downward-moving second sleeve 60 drives the driving frame 66 to slide downward in the second driving groove 65 on the second driving bar 64, and the driving frame 66 squeezes the groove wall of the second driving groove 65 to pull the second driving bar 64 to slide in the guide groove 63, and the positioning block 67 is pulled out from the positioning groove 69 at the corresponding position of the longitudinal bar 68, and the positioning of the longitudinal seat 58 is released on the transverse plate 5, and then the handle 61 is used to pull the longitudinal seat 58 to slide in the longitudinal groove 57, and it can be adjusted along the width of the bed body 1 according to the needs of the actual situation. To adjust the position of the expansion piece 23, when the angle needs to be adjusted, it is only necessary to use the second turntable 50 to rotate the second screw 49 on the fourth fixed block 38, and the first sleeve 55 moves on the rotating second screw 49, driving the insertion rod 53 to move along the length direction of the adjustment cylinder 37. By sliding the insertion rod 53 in the first adjusting slot 52 and the second adjusting slot 54, the adjustment cylinder 37 and the cross plate 5 can be driven to rotate as a whole, so as to flexibly adjust the angle of the expansion piece 23. Then, the first turntable 19 is used to rotate the first screw 18, and the first vertical bar 17 and the transmission bar 20 are moved on the first screw 18 as a whole. The gear 24 can drive the two sets of expansion bars 22 and the expansion piece 23 to perform orthopedic expansion work. When the expansion work is completed, the expansion piece 23 needs to be expanded. When folding during expansion, first, the pull block 28 drives the card rod 27 to be pulled out from the radial groove 30, and the positioning of the first vertical plate 4 and the second vertical plate 6 on the fan-shaped plate 7 is released. When one of the pull blocks 28 moves upward, it drives one end of the driving rod 48 to slide upward in the first driving groove 47, and the one end of the driving rod 48 squeezes the groove wall of the first driving groove 47 to push the card block 41 out of the card slot 39, and the positioning of the cross plate 5 at the top of the second vertical plate 6 is released. In this way, the second vertical plate 6 can be directly rotated and folded to the crossbeam 2 for further storage, and then the cross plate 5 is turned upward with the second rotating shaft 12 on the second fixing block 13 as the axis. In the process of the cross plate 5 being turned, the cross plate 5 is rotated a quarter of a circle with the rotating column 14 as the axis. In this way, as the cross plate 5 continues to turn, The horizontal plate 5 can be smoothly folded onto the first vertical plate 4, and when the folded first vertical plate 4 and the horizontal plate 5 continue to be rotated down, the first vertical plate 4 can be pulled to pull the bottom positioning frame 36 of the second fixing frame 35 out of the square block 34, thereby releasing the limit between the first vertical plate 4 and the first fixing block 10. In this way, when the first vertical plate 4 is turned down for storage, the folded first vertical plate 4 and the horizontal plate 5 can be turned as a whole under the bed body 1 for storage through the rotation between the first connecting block 32 and the second connecting block 33, thereby avoiding the expansion structure on the horizontal plate 5 extending out of the bed body 1 after folding, causing medical staff to be accidentally injured on the expansion structure. This is not only simple and convenient to operate, but also can be used to store the expander reasonably, avoiding the expander occupying limited space in the ward when stored.

[0047] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bone expander, comprising a bed (1), a first vertical plate (4) and a second vertical plate (6), characterized in that: Two crossbeams (2) are connected between the legs of the bed body (1), and a transverse seat (3) is movably sleeved on each of the crossbeams (2). A first vertical plate (4) and a second vertical plate (6) are provided on the transverse seat (3) through a first flip structure. The first vertical plate (4) and the second vertical plate (6) are distributed at the front and rear sides of the bed body (1). A transverse plate (5) is provided at the top end of the first vertical plate (4) through a second flip structure. An expansion structure is provided on the transverse plate (5) through a longitudinal adjustment structure. A second positioning structure for positioning the transverse plate (5) is provided at the top end of the second vertical plate (6). The first flip structure comprises two fan-shaped plates (7) arranged on the transverse seat (3), the two fan-shaped plates (7) rotate through the first rotating shaft (8), a disc (9) is fixedly sleeved in the middle of the first rotating shaft (8), a first fixed block (10) is installed on the side of the disc (9), a third flip structure is arranged between the first fixed block (10) and the first vertical plate (4), and a first positioning structure is arranged between the disc (9) and the fan-shaped plates (7); The second flip structure comprises a first opening (11) provided at the top end of the first vertical plate (4); a second rotating shaft (12) is rotated and passed through the first opening (11); a second fixed block (13) is fixedly sleeved at the middle of the second rotating shaft (12); a rear end of the second fixed block (13) is rotatably connected to a rotating column (14); and a rear end of the rotating column (14) is fixedly connected to the horizontal plate (5).

2. A bone expander according to claim 1, characterized in that: The expansion structure comprises a first fixed frame (15) arranged on the horizontal plate (5), a first groove (16) is provided at the middle of the lower side of the first fixed frame (15), a first vertical bar (17) is movably inserted into the middle of the lower inner wall of the first fixed frame (15), a first screw rod (18) is rotatably inserted into the thread groove at the middle of the top of the first vertical bar (17), the first screw rod (18) is rotatably connected to the upper inner wall of the first fixed frame (15), a first rotary disk (19) is fixedly sleeved on the first screw rod (18), the bottom end of the first vertical bar (17) is connected to a transmission bar (20) passing through the first groove (16), the first groove (16) is rotatably passed through a third rotating shaft (21) at both sides thereof, a gear (24) is fixedly sleeved at the middle of the third rotating shaft (21), the transmission bar (20) is provided with teeth meshing with the gear (24) on both sides, an expansion bar (22) is fixedly sleeved near both ends of the third rotating shaft (21), and an expansion piece (23) is provided at the bottom end of the expansion bar (22).

3. The bone expander according to claim 1, characterized in that: The first positioning structure includes a through slot (25) provided on the disc (9), an inner block (26) is movably inserted into the through slot (25), both ends of the inner block (26) are fitted on the fan-shaped plate (7), and a clamping rod (27) is connected to both the front and rear ends of the inner block (26), a first spring (31) is connected between the upper surface of the inner block (26) and the groove wall on one side of the through slot (25), an arcuate slot (29) is provided on the fan-shaped plate (7), two radial slots (30) are provided on the fan-shaped plate (7), and the two radial slots (30) are respectively connected to the two ends of the arcuate slot (29), the clamping rod (27) is clamped in one of the arcuate slots (29), and the clamping rod (27) passes through one end of the fan-shaped plate (7) and is connected to the pull block (28), and the pull block (28) is fitted on the fan-shaped plate (7).

4. The bone expander according to claim 1, characterized in that: The third flip structure comprises a square block (34) mounted in the middle of the upper portion of the first fixed block (10); the middle portion of the upper portion of the square block (34) is fixedly connected to the second connecting block (33); the bottom end of the first vertical plate (4) is connected to the second fixed frame (35); the middle portion of the lower portion of the second fixed frame (35) is fixedly connected to the first connecting block (32); the first connecting block (32) and the second connecting block (33) are rotatably connected; a positioning frame (36) is mounted at the bottom end of the second fixed frame (35); and the positioning frame (36) is movably sleeved on the square block (34).

5. The bone expander according to claim 1, characterized in that: The second positioning structure comprises an adjusting cylinder (37) fixedly connected to the rear end of the horizontal plate (5), one end of the adjusting cylinder (37) is rotatably connected to the fourth fixed block (38), an angle adjustment structure is provided between the fourth fixed block (38) and the adjusting cylinder (37), a second opening (40) is provided at the top of the second vertical plate (6), and a clamping block (41) is movable through the left and right inner walls of the second opening (40), and the clamping block (41) is inserted into a clamping groove (39) provided on the fourth fixed block (38), and a second vertical bar (42) is connected to the side away from each other below the two clamping blocks (41), and an insertion bar (44) is connected to the bottom end of the side close to each other on the two second vertical bars (42), and a second groove (43) is provided on the second vertical plate (6) for the insertion bar (44) to be inserted into the second groove (43), and one end of the insertion bar (44) is connected to the limiting block (45), and a driving structure is provided between the second vertical bar (42) and the corresponding pull block (28).

6. The bone expander according to claim 5, characterized in that: The driving structure includes a first driving bar (46) connected to the bottom end of the second vertical bar (42), and each of the first driving bars (46) is provided with a first driving groove (47) near the bottom end. The corresponding pulling blocks (28) are connected with driving rods (48) near both ends, and the top end of the driving rods (48) is movably inserted into the first driving groove (47).

7. The bone expander according to claim 5, characterized in that: The angle adjustment structure includes a second screw (49) that rotates and passes through, a second turntable (50) is fixedly sleeved on one end of the second screw (49), a first limit plate (56) is fixedly connected to one end of the inner wall of the adjustment cylinder (37), a first sleeve (55) is interactively sleeved on the first limit plate (56), the first limit plate (56) and the end surface of the first sleeve (55) are square, a thread groove for the second screw (49) to rotate and pass through is provided on one end surface of the first sleeve (55), the first sleeve (55) is connected to the insertion rod (53) near the fourth fixed block (38) below, a transverse groove (51) is provided on the inner wall of the adjustment cylinder (37) near the insertion rod (53), a first adjustment groove (52) is provided on the adjustment cylinder (37) that is connected to one end of the transverse groove (51), and a second adjustment groove (54) is provided on the adjustment cylinder (37) that is connected to the other end of the transverse groove (51).

8. The bone expander according to claim 1, characterized in that: The longitudinal adjustment structure comprises a longitudinal groove (57) provided on the transverse plate (5) along its length direction, a longitudinal seat (58) being slidably arranged in the longitudinal groove (57), the longitudinal seat (58) being mounted on the upper surface of the first fixed frame (15), and a handle (61) being arranged on the longitudinal seat (58) via a third positioning structure.

9. The bone expander according to claim 8, characterized in that: The third positioning structure includes a second limiting plate (59) connected to the middle of the longitudinal seat (58), a second sleeve (60) is movably mounted on the top of the second limiting plate (59), the top of the second sleeve (60) is mounted on the handle (61), a second spring (62) is mounted on the second limiting plate (59), and the two ends of the second spring (62) are respectively connected to the longitudinal seat (58) and the second sleeve (60), and the upper edges of the left and right sides of the transverse plate (5) are connected to longitudinal strips (68), and the longitudinal strips (68) are provided with a number of equidistant openings. The longitudinal seat (58) is provided with a guide groove (63) at the middle of the left and right sides, and a second driving bar (64) is slidably arranged in the guide groove (63). The second driving bar (64) is connected to the positioning block (67) at the bottom end of a side away from the second limiting plate (59). The positioning block (67) is movably inserted into the positioning groove (69) at the corresponding position. The second driving bar (64) is provided with a second driving groove (65), and the second sleeve (60) is connected with a driving frame (66) that movably passes through the second driving groove (65).

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