CN111603228B

CN111603228B - A lumbar spine fixation support device

Info

Publication number: CN111603228B
Application number: CN202010465560.XA
Authority: CN
Inventors: 侯洋; 史国栋; 孔庆捷; 史建刚
Original assignee: Shanghai Changzheng Hospital
Current assignee: Shanghai Changzheng Hospital
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-04-13
Anticipated expiration: 2040-05-28
Also published as: CN111603228A

Abstract

A lumbar vertebra fixation and support device, comprising several ball head screws, several square blocks, connecting rod assemblies and clamping assemblies, the top of the square blocks is provided with a first through hole, the lower end of the first through hole is spherical inside, and the inside of the first through hole is spherical. Threads are provided, and the front, rear, left, right, and four sides of the square block are provided with a first through groove with an upper end open, the first through groove is communicated with the first through hole, and the ball head of the ball head screw is matched with the ball inside the lower end of the first through hole. The upper side of the ball head of the ball head screw is provided with a first thread pressure block, the first thread pressure block is threadedly connected with the inner thread of the first through hole, and the ball head of the ball head screw is provided with a hexagonal hole. This design realizes the active adjustment of the included angle of the adjacent rods through the clamping component, and the fine adjustment is carried out through the air pressure, which is more accurate than the traditional adjustment method, and can be adjusted again after the whole component is assembled. The clamping assembly of the connecting rod assembly is carried out by holding the assembly, which can be easily operated in a narrow space.

Description

Lumbar vertebra fixing and supporting device

Technical Field

The invention belongs to the field of medical equipment, and particularly relates to a lumbar vertebra fixing and supporting device.

Background

At present, the pedicle screw and rod fixing system used in orthopedic surgery is composed of a plurality of pedicle screws (hereinafter referred to as "screws") and a connecting rod (hereinafter referred to as "rod") for connecting the pedicle screws, the early pedicle screw and rod fixing system is manufactured according to the theory of rigid fixation and fusion called "golden law", and is characterized in that: the connecting rod is a rigid rod, although each pedicle screw is distinguished by a single-axis screw and a universal screw, the whole pedicle screw rod system and the implanted pathological vertebral body are fixed into a whole without relative movement at the tail section of the operation, namely after the screw plug locks the connecting rod; however, as the academic world continues to develop, people invent a phenomenon that: if the vertebral bodies after the operation can keep small relative movement, the possible damage caused by stress concentration of adjacent segments can be reduced, and the rehabilitation is facilitated.

Most of the existing pedicle screw assemblies are fixedly installed, the connecting rod needs to be bent in advance, the connecting rod needs to be bent again if the curvature is not appropriate after installation, the operation difficulty is high, the pedicle screw assembly is not favorable for installation, the pedicle screw assembly can only be used once and is difficult to recycle, and the existing pedicle screw rod fixing system is difficult to further adjust or fine adjust after the integral assembly is completed.

Disclosure of Invention

The invention provides a lumbar vertebra fixing and supporting device, which is used for solving the defects in the prior art.

The invention is realized by the following technical scheme:

a lumbar vertebra fixing and supporting device comprises a plurality of ball head screws, a plurality of square blocks, a connecting rod assembly and a clamping assembly, wherein a first through hole is formed in the top end of each square block, the inner part of the lower end of each first through hole is spherical, threads are formed in the inner part of each first through hole, first through grooves with openings at the upper ends are formed in the front side, the rear side, the left side and the right side of each square block, the first through grooves are communicated with the first through holes, the ball head parts of the ball head screws are matched with the spheres in the lower ends of the first through holes, first thread pressing blocks are arranged on the upper sides of the ball head parts of the ball head screws, the first thread pressing blocks are in threaded connection with; the connecting rod assembly comprises a plurality of rod bodies with rectangular sections, two second through holes which are parallel to each other and distributed up and down are arranged in each rod body, piston rods are arranged at two ends of each second through hole in a matched mode, third through holes are arranged at positions, corresponding to the second through holes, of the top and the bottom in the middle of each rod body, a spherical plug is arranged at the inner end of each third through hole, the spherical plug is fixedly connected with one side, far away from the third through holes, of the inner portion of each third through hole through a spring, the inner ends of the third through holes are sealed by the spherical plugs due to the elasticity of the springs, baffles are arranged at two sides of the inner ends of the third through holes, outer rings of the baffles are fixedly connected with the inner walls of the third through holes in a sealed mode, a fourth through hole is arranged in the middle of each baffle, a sealing plate is arranged at the inner end of each fourth through hole, the inner sides of the sealing plates are fixedly connected with, the hinge sub-part is rotationally connected with the hinge main part at the outer end of the adjacent piston rod; the clamping assembly comprises a vertical pipe, an external threaded pipe is sleeved at the lower end of the vertical pipe, the external threaded pipe is connected with the vertical pipe through a bearing, a nut is installed on the external threaded pipe in a matched mode, a transverse plate is fixedly installed at the lower end of the vertical pipe, a lantern ring is fixedly installed on the left side of the nut, a guide shaft is installed in the lantern ring in a matched mode, the lower end of the guide shaft is fixedly connected with the left end of the transverse plate, clamping plates are fixedly installed on the right sides of the transverse plate and the nut, the clamping plates are hollow inside, hemispherical elastic air bags are fixedly installed on the opposite sides of the right ends of the two clamping plates, a top pipe penetrates through the center of each elastic air bag, the joint of each top pipe and the elastic air bags is fixedly connected in a sealing mode, the inner end of each top pipe is fixedly connected with the corresponding clamping plate and communicated with the inside of, the side surface of the vertical pipe is symmetrically provided with strip holes in the vertical direction corresponding to the two side positions of the lower part of the piston, the same cross rod is arranged in the two strip holes at the same height, the two ends of the cross rod respectively extend into the corresponding strip holes, external threads are arranged on the outer part of the middle upper part of the side surface of the vertical pipe, an internal thread sleeve is installed at the position corresponding to the cross rod on the vertical pipe in a matching way, an annular sliding groove is formed in the inner ring of the internal thread sleeve, sliding blocks are installed between the two ends of the cross rod and the annular sliding groove in a matching way, the bottom of the piston, close to the upper side of the cross rod, is fixedly connected with the bottom of the piston through a supporting rod, a closed cylindrical cavity is formed between the adjacent partition plate and the piston; the body of rod passes two relative first grooves that pass on one of them square piece, be equipped with second screw thread briquetting in the first through-hole upper end, second screw thread briquetting and first through-hole screw-thread fit, hexagonal hole is all seted up with first screw thread briquetting to second screw thread briquetting, cross recess is all seted up with first screw thread briquetting top in second screw thread briquetting bottom, first groove bottom portion that passes all sets up the second groove that passes, first spherical recess is all seted up to the position that body of rod top and bottom correspond the third through-hole, the elastic air bag can cooperate with first spherical recess, the diameter of third through-hole is greater than the diameter of push pipe.

According to the lumbar fixing and supporting device, the rod body is fixedly provided with the two limiting rings, and the distance between the two limiting rings is equal to the width of the square block.

According to the lumbar fixing and supporting device, the hinged female part is a spherical shell, the hinged male part is a sphere, and the sphere can rotate in the spherical shell.

According to the lumbar fixing and supporting device, the hinge female part is a cylindrical shell, the hinge sub-part is a cylinder, the cylinder can rotate along the axis of the cylinder in the cylindrical shell, and the axis of the cylinder is horizontal.

According to the lumbar fixing and supporting device, the inner end of the third through hole is provided with the second spherical groove, one side of the spherical plug, facing the third through hole, is coated with the rubber layer, and the part of the spherical plug, coated with the rubber layer, is matched with the corresponding second spherical groove.

According to the lumbar fixing and supporting device, the first sealing ring is mounted at the inner end of the piston column, the second sealing ring is fixedly mounted in the inner end of the fourth through hole, and the second sealing ring is attached to the corresponding sealing plate.

According to the lumbar vertebra fixing and supporting device, the handle is fixedly installed at the upper end of the vertical pipe, the outer periphery of the upper end of the external threaded pipe is sleeved with the circular ring, and the outer ring of the circular ring is provided with the anti-skid threads.

The invention has the advantages that: when the invention is used, the invention is assembled as shown in figure 1, firstly, a ball head screw passes through a first through hole to enable the ball head part to be matched with a ball shape in the lower end of the first through hole, a first thread pressing block is arranged on the upper side of the ball head part of the ball head screw to connect the ball head screw with a square block, a rod body is pressed in two opposite first through grooves of the square block through a second thread pressing block, at the moment, a third through hole is ensured to be positioned in the middle of the square block, the rod body of a connecting rod assembly can have various quantity specifications, a proper connecting rod assembly is selected according to the requirement of an actual operation, after the assembly is finished, two clamping plates of a clamping assembly are inserted through an upper cross groove and a lower cross groove, a nut is driven to move under the thread matching by rotating an external thread pipe, thereby adjusting the distance between the two clamping plates, and the elastic air bag is matched with the, two jacking pipes respectively penetrate into two third through holes (as shown in figures 8 and 11), then two clamping plates are continuously close to each other, the elastic air bags deform and seal the outer ends of the corresponding third through holes, the partially deformed elastic air bags are extruded into the upper ends of the third through holes, then the jacking pipes electrically correspond to the spherical plugs to move (as shown in figure 13), the sealing plates move along with the elastic air bags under the action of the connecting rods, at the moment, the third through holes and the fourth through holes are simultaneously opened, the corresponding pistons can be driven to move up and down by rotating the internal thread sleeves through the annular sliding grooves, the cross rods and the sliding blocks, air in the cylindrical cavities is extruded into the first through holes when the pistons move down, the piston rods on the upper sides of the pipe bodies move outwards in the first through holes, otherwise, the piston rods move inwards, and the distance and the included angle between two adjacent rod bodies can be adjusted by adjusting the extension and retraction of the piston rods in, meanwhile, the hinged sub-part rotates for a certain angle in the corresponding hinged parent part, the two clamp plates are kept away after adjustment, the push pipe is firstly separated from the spherical plug, the spherical plug seals the inner end of the third through hole, then the elastic air bag is separated from the outer end of the third through hole, the third through hole is not sealed, the spherical plug and the seal plate are reset, the clamping assembly is taken down, the space between the inner end of the piston rod and the baffle plate is ensured to be constant, the extending length of the piston rod can be locked, two piston rods extend out of one end of each rod body, under the matching of the two groups of hinged sub-parts and the hinged parent part, the included angle between the two adjacent rod bodies is kept stable (as shown in figure 9), the curvature of the whole connecting assembly can be adjusted according to the included angle between a plurality of rod bodies after adjustment, the curvature of the connecting rod assembly can be buffered within a certain small angle after adjustment, and the length of an air column between the inner end of the piston rod and the baffle plate The design ensures that the whole assembly has a certain buffering effect under the action of external force, so that adjacent pedicle screws are not rigidly connected, the stress concentration of adjacent sections is better reduced, the degeneration of the adjacent sections is reduced, the angle and the distance between the adjacent sections can be finely adjusted or mounted by screws, the assembly can be quickly fixed after fine adjustment, the problem of high difficulty in angle adjustment of the adjacent sections caused by inaccurate drilling angle can be solved, fine adjustment can be performed according to actual conditions after an operation process, the connecting rod assembly of the device can be used for multiple times after being disassembled and cleaned through disinfection, the material cost is reduced, the waste is reduced, the design realizes that the included angle of adjacent rod bodies is actively adjusted through the clamping assembly, fine adjustment is performed through air pressure, and the adjusting mode is more accurate compared with the traditional adjusting mode, can accomplish the adjustment once more in the later stage at whole subassembly assembly, still can carry out the centre gripping formula equipment of connecting rod subassembly through the centre gripping subassembly, can conveniently operate in narrow and small space, convenient more health.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention; FIG. 2 is an enlarged view of the spherical view of the A-directed hinge sub-assembly of FIG. 1; FIG. 3 is an enlarged view of the cylindrical view of the A-direction hinge sub of FIG. 1; FIG. 4 is an enlarged view of a portion I of FIG. 1; FIG. 5 is a partial enlarged view of section II of FIG. 1; FIG. 6 is a partial enlarged view of section III of FIG. 2; FIG. 7 is a partial enlarged view of the portion IV of FIG. 3; FIG. 8 is a schematic structural view of the clamping assembly; FIG. 9 is a schematic view of a cross-groove configuration; FIG. 10 is a view showing a state of use after the angle of the adjacent rods is adjusted; FIG. 11 is an enlarged partial view of section V of FIG. 8; FIG. 12 is a partially enlarged view of a VI portion of FIG. 8; fig. 13 is a view showing a state of use in which the elastic bag 31 is engaged with the first spherical recess; fig. 14 is a partially enlarged view of the vii portion of fig. 13.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A lumbar vertebra fixing and supporting device is shown in the figure and comprises a plurality of ball head screws 1, a plurality of square blocks 2, a connecting rod assembly and a clamping assembly, wherein a first through hole 3 is formed in the top end of each square block, the inner part of the lower end of each first through hole 3 is spherical, threads are formed in each first through hole 3, first through grooves 4 with openings at the upper ends are formed in the front side, the rear side, the left side and the right side of each square block 2, the first through grooves 4 are communicated with the first through holes 3, the ball head parts of the ball head screws 1 are matched with the spheres in the lower ends of the first through holes, first thread pressing blocks 5 are arranged on the upper sides of the ball head parts of the ball head screws 1, the first thread pressing blocks 5 are in threaded connection with the threads; the connecting rod assembly comprises a plurality of rod bodies 6 with rectangular sections, two second through holes 7 which are parallel to each other and distributed up and down are arranged in each rod body 6, two ends of each second through hole 7 are matched with and provided with a piston rod 8, third through holes 9 are arranged at the positions, corresponding to the second through holes 7, of the top and the bottom in the middle of each rod body 6, the inner ends of the third through holes 9 are provided with spherical plugs 10, the spherical plugs 10 are fixedly connected with one sides, far away from the third through holes 9, in the third through holes, through springs 11, the elastic force of the springs 11 enables the spherical plugs 10 to seal the inner ends of the third through holes 9, two sides of the inner ends of the third through holes 9 are provided with baffle plates 12, the outer rings of the baffle plates 12 are fixedly connected with the inner walls of the third through holes 9 in a sealing manner, fourth through holes 13 are arranged in the middles of the baffle plates 12, sealing plates 14 are provided with sealing plates 14, the outer end of the piston rod 8 positioned on the right side is fixedly provided with a hinge female member 15, the outer end of the piston rod 8 positioned on the left side is fixedly provided with a hinge sub-member 16, and the hinge sub-member 16 is rotatably connected with the hinge female member 15 at the outer end of the adjacent piston rod 8; the clamping assembly comprises a vertical pipe 24, an external threaded pipe 25 is sleeved at the lower end of the vertical pipe 24, the external threaded pipe 25 is connected with the vertical pipe 24 through a bearing, a nut 26 is installed on the external threaded pipe 25 in a matching mode, a transverse plate 27 is fixedly installed at the lower end of the vertical pipe 24, a lantern ring 28 is fixedly installed at the left side of the nut 26, a guide shaft 29 is installed in the lantern ring 28 in a matching mode, the lower end of the guide shaft 29 is fixedly connected with the left end of the transverse plate 27, clamping plates 30 are fixedly installed on the right sides of the transverse plate and the nut 26, the clamping plates 30 are hollow, hemispherical elastic air bags 31 are fixedly installed on the opposite sides of the right ends of the two clamping plates 30, a top pipe 32 penetrates through the center of each elastic air bag 31, the connection part of each top pipe 32 and each elastic air bag 31 is fixedly connected in a sealing mode, the connection part of each elastic air bag 31 and the side of the corresponding clamping plate, pistons 34 are installed on the lower sides of partition plates 33 in a matched mode in the vertical pipes, elongated holes 35 in the vertical directions are symmetrically formed in the side faces of the vertical pipes corresponding to the two sides of the lower portions of the pistons 34, the same cross rod 36 is arranged in the two elongated holes 35 at the same height, two ends of the cross rod 36 extend into the corresponding elongated holes respectively, external threads are arranged on the outer portion of the middle upper portion of the side faces of the vertical pipes, an internal thread sleeve 37 is installed on the position, corresponding to the cross rod 36, of each vertical pipe in a matched mode, an annular sliding groove 38 is formed in the inner ring of each internal thread sleeve 37, sliding blocks 39 are installed between two ends of each cross rod 36 and the corresponding annular sliding groove 38 in a matched mode, the bottom of each piston 34, close to the upper side, of each cross rod 36 is fixedly connected with the piston through a supporting rod, a closed cylindrical cavity 40 is formed between each adjacent partition plate 33; the body of rod 6 passes two relative first grooves 4 that pass on one of them square piece 2, be equipped with second screw thread briquetting 19 in the 3 upper ends of first through-hole, second screw thread briquetting 19 and 3 screw-thread cooperations of first through-hole, hexagonal hole is all seted up with first screw thread briquetting to second screw thread briquetting 19, cross recess 20 is all seted up with first screw thread briquetting top to second screw thread briquetting bottom, first groove 21 that pass through is all seted up to the second, first spherical recess is all seted up to the position that body of rod 6 top and bottom correspond third through-hole 9, elastic air bag 31 can cooperate with first spherical recess, the diameter of third through-hole 9 is greater than the diameter of push pipe. When the invention is used, the invention is assembled as shown in figure 1, firstly, a ball head screw 1 passes through a first through hole 3 to lead the ball head part to be matched with the ball shape inside the lower end of the first through hole, a first thread pressing block 5 is arranged on the upper side of the ball head part of the ball head screw 1 to connect the ball head screw with a square block, a rod body is pressed in two opposite first through grooves 4 of the square block through a second thread pressing block, at the moment, a third through hole 9 is ensured to be positioned at the middle position of the square block, the number of the rod bodies of the connecting rod assembly can have various specifications, a proper connecting rod assembly is selected according to the actual operation requirement, after the assembly is finished, two clamping plates of a clamping assembly extend into the square block through an upper cross groove and a lower cross groove, a nut drives the clamping plate on the upper side to move under the thread matching by rotating an external thread pipe 25, thereby adjusting the distance between the two clamping plates, two jacking pipes respectively penetrate into two third through holes 9 (as shown in figures 8 and 11), then the two clamping plates are continuously close to each other, the elastic air bags deform and seal the outer ends of the corresponding third through holes 9, the partially deformed elastic air bags are extruded into the upper ends of the third through holes 9, then the jacking pipes electrically correspond to the spherical plugs (as shown in figure 13), the sealing plates 14 move along with the elastic air bags under the action of the connecting rods, at the moment, the third through holes 9 and the fourth through holes 13 are simultaneously opened, the corresponding pistons 34 can be driven to move up and down by rotating the internal thread sleeves through the annular sliding grooves 38, the cross rods 36 and the sliding blocks 39, air in the cylindrical cavities is extruded into the first through holes 3 when the pistons move down, the piston rods on the upper sides of the pipe bodies move outwards in the first through holes 3, otherwise, the distance and the included angle between the two adjacent rod bodies can be adjusted by adjusting the expansion and contraction of the piston rods in the upper and the lower two first, meanwhile, the hinged sub-component 16 rotates a certain angle in the corresponding hinged main component, the two clamp plates are far away after adjustment, the top pipe is firstly separated from the spherical plug, the spherical plug seals the inner end of the third through hole 9, then the elastic air bag is separated from the outer end of the third through hole 9, the third through hole 9 is not sealed, the spherical plug and the sealing plate are reset, the clamping component is taken down, the space between the inner end of the piston rod and the baffle plate 12 is ensured to be constant, the extending length of the piston rod can be locked, because one end of each rod body extends out of two piston rods, under the matching of the two groups of hinged sub-components 16 and the hinged main component, the included angle between the two adjacent rod bodies is kept stable (as shown in figure 9), the curvature of the whole connecting rod component can be adjusted according to the included angle between a plurality of rod bodies, and the curvature of the connecting rod component can be buffered within a certain small angle, the length of the air column between the inner end of the piston rod and the baffle 12 can be changed slightly in a certain range under external force, the design ensures that the assembly has a certain buffer effect on the whole under the external force, so that adjacent pedicle screws are not rigidly connected, the stress concentration of adjacent sections is better reduced, and the occurrence of degeneration of the adjacent sections is reduced, the angle and the distance between the adjacent sections can be finely adjusted or mounted by the screw by the design, the fine adjustment can be quickly fixed, the problem of high difficulty in angle adjustment of the adjacent sections caused by inaccurate drilling angle can be solved, the fine adjustment can be performed according to the actual situation after the operation process, the connecting rod assembly of the device can be disassembled and sterilized and cleaned for multiple times, the material cost is reduced, the waste is reduced, and the design realizes the active adjustment of the included angle of the adjacent rod bodies by the clamping assembly, carry out the adjustment of refining through atmospheric pressure, more accurate for traditional adjustment mode, can accomplish the adjustment once more in the later stage at whole subassembly assembly, still can carry out the centre gripping formula equipment of connecting rod subassembly through the centre gripping subassembly, can conveniently operate in narrow and small space, more convenient health.

Specifically, as shown in the figure, two limiting rings 22 are fixedly mounted on the rod body 6, and the distance between the two limiting rings 22 is equal to the width of the square block. When the body of rod 6 was installed with square piece cooperation, two spacing rings 22 were located the first groove 4 outer ends that pass through of square piece, can be with the body of rod 6 fixed of carrying out the position on square piece, avoided the body of rod to remove by oneself for square piece, did not guarantee the assembly stability of this device.

Specifically, as shown in the drawings, the hinge female member 15 of the present embodiment is a spherical housing, and the hinge female member 16 is a sphere, and the sphere can rotate in the spherical housing. The design enables the two connected rod bodies to realize multi-angle adjustment, and can be applied to special conditions of multi-direction bending of the connecting rod assembly.

Further, as shown in the drawings, the hinge female member 15 of the present embodiment is a cylindrical housing, and the hinge female member 16 is a cylinder, and the cylinder is rotatable along its axis in the cylindrical housing, and the axis of the cylinder is horizontal. This design makes the angle between the two adjacent body of rod only can be in vertical plane angle regulation, can fix the vertebra more stably at the correct curvature after the angle locking, and this design can guarantee that the connective bar subassembly can maintain certain angle, can not be crooked by oneself, and structural stability is higher.

Furthermore, as shown in the figure, a second spherical groove is formed at the inner end of the third through hole 9 in the embodiment, a rubber layer 23 is coated on one side of the spherical plug facing the third through hole 9, and the rubber layer coated part of the spherical plug is matched with the corresponding second spherical groove. This design can improve the effect of the closure of the third through-hole.

Furthermore, as shown in the figure, the inner end of the piston rod in this embodiment is provided with a first sealing ring, the inner end of the fourth through hole 13 is fixedly provided with a second sealing ring, and the second sealing ring is attached to the corresponding sealing plate 14. Through the design, the air tightness of the assembly can be improved, and the stability of the structure is ensured.

Furthermore, as shown in the drawings, a handle 43 is fixedly installed at the upper end of the vertical tube 24 according to the embodiment, a circular ring 44 is sleeved on the outer circumference of the upper end of the external threaded tube 25, and the outer ring of the circular ring 44 is provided with anti-slip threads. Make things convenient for the staff to snatch the centre gripping subassembly through this design to conveniently rotate external screw tube, it is more laborsaving to operate.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A lumbar vertebrae fixation and support device, characterized in that it comprises several ball head screws (1), several square blocks (2), connecting rod assemblies and clamping assemblies, and a first through hole (3) is provided at the top of the square block. , the inside of the lower end of the first through hole (3) is spherical, the inside of the first through hole (3) is provided with threads, and the four sides of the square block (2) are provided with a first through groove (4) with an upper end opening. The through groove (4) is communicated with the first through hole (3), the ball head of the ball head screw (1) is matched with the ball inside the lower end of the first through hole, and the ball head of the ball head screw (1) is provided on the upper side. There is a first threaded pressure block (5), the first threaded pressure block (5) is threadedly connected with the first through hole (3), and the ball head of the ball head screw (1) is provided with a hexagonal hole; the connecting rod assembly includes several A rod body (6) with a rectangular root cross-section is provided in the rod body (6) with two second through holes (7) that are parallel to each other and distributed up and down, and both ends of the second through hole (7) are matched to install a piston rod (8). , a third through hole (9) is provided at the top and bottom of the middle of the rod body (6) corresponding to the position of the second through hole (7), and a spherical plug (10) is provided at the inner end of the third through hole (9). ) is fixedly connected to the side of the third through hole away from the third through hole (9) through a spring (11), and the elastic force of the spring (11) makes the ball plug (10) close the inner end of the third through hole (9). , baffles (12) are arranged on both sides of the inner end of the third through hole (9), the outer ring of the baffle (12) is sealed and fixedly connected with the inner wall of the third through hole (9), and the middle of the baffle (12) is provided with a fourth The through hole (13), the inner end of the fourth through hole (13) is provided with a sealing plate (14), the inner side of the sealing plate (14) is fixedly connected with the corresponding spherical plug (10) through a connecting rod, and the sealing plate (14) can The inner end of the corresponding fourth through hole (13) is closed, the outer end of the piston rod (8) located on the right side is fixedly installed with the hinged mother piece (15), and the outer end of the piston rod (8) located on the left side is fixedly installed with the hinged sub-piece (16), the hinged sub-piece (16) is rotatably connected with the hinged female piece (15) at the outer end of the adjacent piston rod (8); the clamping assembly includes a vertical pipe (24), and the lower end of the vertical pipe (24) is sleeved with an externally threaded pipe (25), the externally threaded pipe (25) and the standpipe (24) are connected through a bearing, the externally threaded pipe (25) is fitted with a mounting nut (26), and the lower end of the standpipe (24) is fixed to install the horizontal plate (27), the nut The left side of (26) is fixedly installed with the collar (28), the collar (28) is fitted with the guide shaft (29), the lower end of the guide shaft (29) is fixedly connected to the left end of the horizontal plate (27), and the horizontal plate and the nut ( The right side of 26) is fixedly installed with a splint (30), the splint (30) is hollow inside, and the opposite sides of the right ends of the two splints (30) are fixedly installed with a hemispherical elastic airbag (31), the center of the elastic airbag (31) Passing through a jacking pipe (32), the connection between the jacking pipe (32) and the elastic air bag (31) is a sealed and fixed connection, and the connection between the elastic air bag (31) and the splint (30) side is a sealed and fixed connection, and the jacking pipe (32) ) is fixedly connected with the splint (30) and communicated with the corresponding splint (30), and the vertical pipe ( 24) Two partition plates (33) distributed up and down are fixedly installed in the middle and upper part of the inside. The pistons (34) are installed on the lower side of the partition plates (33) in the vertical pipe, and the sides of the vertical pipe correspond to the lower two sides of the piston (34). The elongated holes (35) in the upper and lower directions are symmetrically opened, and the two elongated holes (35) at the same height are provided with the same crossbar (36), and the two ends of the crossbar (36) respectively extend into the corresponding lengths. Inside the strip hole, an external thread is provided on the outside of the middle and upper part of the side surface of the standpipe. An internal threaded sleeve (37) is fitted on the standpipe corresponding to the cross bar (36), and an annular chute (38) is provided in the inner ring of the internal threaded sleeve (37). , the two ends of the cross rod (36) and the annular chute (38) are fitted with the sliding block (39). A closed cylindrical cavity (40) is formed between the diaphragm (33) and the piston. The outer end of the jacking pipe (32) is provided with a gap (42); the rod body (6) passes through two opposite first through grooves (4) on one of the square blocks (2), and the first through hole (3) A second thread pressure block (19) is provided in the upper end, the second thread pressure block (19) is threadedly matched with the first through hole (3), and the second thread pressure block (19) and the first thread pressure block are both A hexagonal hole is set, a cross groove (20) is set at the bottom of the second thread pressure block and the top of the first thread pressure block, a second through groove (21) is set at the bottom of the first through groove, and the top and bottom of the rod body (6) correspond to the first through grooves (21). The positions of the three through holes (9) are all provided with a first spherical groove, the elastic airbag (31) can be matched with the first spherical groove, and the diameter of the third through hole (9) is larger than the diameter of the top pipe;

When in use, first pass the ball head screw through the first through hole so that the ball head matches the ball inside the lower end of the first through hole. Connect with the square block, press the rod body into the two opposite first through grooves of the square block through the second thread pressure block, at this time, ensure that the third through hole is located in the middle of the square block, and the two parts of the clamping assembly are pressed together. The two splints extend into the upper and lower cross grooves. By rotating the external threaded pipe, the nut drives the upper splint to move under the thread cooperation, so as to adjust the distance between the two splints. The elastic airbag cooperates with the first spherical groove, and the two The root canal goes deep into the two third through holes respectively, and then continues to make the two splints approach, the elastic air bag deforms and closes the outer end of the corresponding third through hole, and the partially deformed elastic air bag is squeezed into the upper end of the third through hole Inside, then the jacking pipe drives the corresponding spherical plug to move, and the sealing plate moves with it under the action of the connecting rod. At this time, the third through hole and the fourth through hole are opened at the same time. The groove, the cross bar and the slider drive the corresponding piston to move up and down. When the piston moves down, the air in the cylindrical cavity is squeezed into the first through hole, and the upper piston rod moves outward in the first through hole, and vice versa. By adjusting the expansion and contraction of the piston rods in the upper and lower first through holes, the distance and included angle between the two adjacent rods can be adjusted, and the hinged sub-piece rotates at a certain angle in the corresponding hinged mother piece. After the adjustment, the two splints are kept away. The top tube is first separated from the spherical plug. After the spherical plug seals the inner end of the third through hole, the elastic airbag is separated from the outer end of the third through hole, and the closure of the third through hole is released. The spherical plug and the sealing plate are reset, and the clamping assembly is removed. The space between the inner end of the piston rod and the baffle is kept constant, and the extended length of the piston rod can be locked. Since two pistons protrude from one end of each rod body In the rod, under the cooperation of the two sets of hinge sub-pieces and the hinge mother piece, the included angle between the two adjacent rod bodies remains stable.

2 . The lumbar spine fixation and support device according to claim 1 , wherein two limit rings ( 22 ) are fixedly installed on the rod body ( 6 ), and the distance between the two limit rings ( 22 ) is equal to a square shape. 3 . The width of the block.

3 . The lumbar vertebrae fixation and support device according to claim 1 , wherein the hinged mother piece (15) is a spherical shell, the hinged sub-piece (16) is a spherical body, and the spherical body can rotate in the spherical shell. 4 . .

4. A lumbar vertebrae fixation and support device according to claim 1, characterized in that: the hinged mother piece (15) is a cylindrical shell, the hinged sub-piece (16) is a cylindrical body, and the cylindrical body can be placed in a cylindrical shape. The cylindrical body rotates along its axis, and the axis of the cylinder is horizontal.

5 . The lumbar vertebrae fixation and support device according to claim 1 , characterized in that: the inner end of the third through hole ( 9 ) is provided with a second spherical groove, and the spherical plug faces the third through hole ( 9 ). 6 . One side is covered with a rubber layer (23), and the part of the spherical plug covered with the rubber layer is matched with the corresponding second spherical groove.

6 . The lumbar vertebrae fixation and support device according to claim 1 , wherein a first sealing ring is installed at the inner end of the piston rod, and a second sealing ring is fixedly installed at the inner end of the fourth through hole ( 13 ). 7 . The second sealing ring is fitted with the corresponding sealing plate (14).

7 . The lumbar vertebrae fixation and support device according to claim 1 , wherein a handle ( 43 ) is fixedly installed at the upper end of the vertical pipe ( 24 ), and a ring ( 44 ) is fitted around the upper end of the outer threaded pipe ( 25 ). 8 . ), the outer ring of the ring (44) is provided with anti-skid patterns.