Positioning bending mechanism with scale and segmented bending device for spinal orthopedic rod

Abstract

The invention provides a positioning bending mechanism with a scale and a segmented bending device for a spine orthopedic rod, belongs to the technical field of surgical medical instruments, is used for pre-bending the spine orthopedic rod before an operation, and comprises a base component, a fixed clamping component, a sliding clamping component, a positioning carriage component and a rotary cylinder component, according to the core working principle, the longitudinal position of a bending point is determined through a linear sliding rail and a side ruler of the linear sliding rail, a bending plane is set through an angle adjusting ruler of a rotating cylinder assembly, and the bending displacement amount is preset and monitored in real time through a displacement measuring instrument installed on an adjusting rotating cylinder; during operation, the bending bolt is screwed to push the bending clamping seat to apply pressure to the orthopedic rod until the deformation of the orthopedic rod reaches a preset value; according to the device, preoperative three-dimensional planning is converted into quantifiable operation in three dimensions of linearity, angle and displacement, closed-loop control from measurement positioning to accurate bending is achieved, and the accuracy, efficiency and repeatability of orthopedic rod forming are remarkably improved.

Description

A positioning bending mechanism with a scale and a segmented bending device for a spinal orthotic bar. Technical Field

[0001] This invention relates to the field of surgical medical device technology, and in particular to a positioning bending mechanism with a ruler and a segmented bending device for a spinal orthotic rod. Background Technology

[0002] Spinal orthotic rods are key implants in spinal internal fixation surgery. Their pre-bending shape must be highly matched with the physiological or pathological curvature of the patient's spine to ensure the orthotic effect and reduce surgical risks.

[0003] Currently, clinical practice mainly relies on surgeons to perform bending and shaping on-site based on visual observation and manual experience. This method has the following significant limitations: First, its accuracy depends entirely on the surgeon's personal experience and feel, and the bending shape is difficult to precisely match the preoperative three-dimensional plan based on medical images, resulting in significant random errors; second, the operation process lacks objective and quantitative feedback. To verify the bending accuracy, it is often necessary to repeatedly temporarily align the orthotic rod with the patient's pedicle screws for verification. This process is not only inefficient and prolongs the operation time, but may also cause surface damage to the orthotic rod, loosening of screws, or even fatigue fracture due to repeated assembly and disassembly; in addition, this manual method cannot achieve parametric recording and reproduction of the bending process, which is not conducive to the establishment of standardized surgical procedures and the promotion of the technology. Summary of the Invention

[0004] The purpose of this invention is to provide a positioning and bending mechanism with a scale. By using the side scale of the base component, the angle adjustment scale of the rotating cylinder component, and the displacement measuring instrument, the digital preoperative planning is transformed into quantifiable parameters of linear, angular, and bending displacement. This enables closed-loop control from precise positioning and quantified bending to real-time detection, thereby significantly improving the forming accuracy, efficiency, and standardization of the spinal orthotic rod, and overcoming the shortcomings of existing manual bending orthotic rods.

[0005] The objective of this invention is achieved through the following technical solution: a positioning bending mechanism with scales and a segmented bending device for spinal orthotics, comprising a base component, a fixing clamp assembly, a sliding clamp assembly, a positioning slide assembly, and a rotating cylinder assembly. The base component includes a linear slide rail and positioning holes; the sliding clamp assembly includes a tapered positioning post; the positioning slide assembly includes a side connecting arm; and the rotating cylinder assembly includes an adjusting rotating cylinder, a bending bolt, an adapter, a displacement measuring instrument, and a bending seat. The positioning holes are vertically arranged within the main body of the linear slide rail, and side scales are provided on both sides of the linear slide rail. The bottom end of the main body of the fixing clamp assembly is fixedly connected to the end of the linear slide rail, and the bottom end of the main body of the sliding clamp assembly is slidably connected to the top of the linear slide rail. The tapered positioning post is vertically slidably connected to the bottom end of the main body of the sliding clamp assembly, and when the sliding clamp assembly clamps the orthotics, the tapered positioning post can be simultaneously inserted into any of the segments. In the corresponding positioning holes; the positioning slide assembly is linearly arranged and slidably connected to the linear slide rail, the side connecting arms are distributed in pairs, the bottom end of the side connecting arm on the same side is slidably connected to the side of the linear slide rail, the top ends of the side connecting arms are fixedly connected side by side without contacting each other with parallel fixed cylinders, the adjusting cylinder is damped and screwed between the parallel fixed cylinders, one of the parallel fixed cylinders has an angle adjustment scale on the outer circle surface, the main body of the adjusting cylinder has a matching threaded part installed and fixed coaxially with its diameter as the path, the symmetrically distributed matching threaded parts are connected with pairs of bent bolts, or connected with bent bolts and adapter seats; the adapter seat can be positioned and fixedly inserted with a displacement measuring instrument, so that the monitoring probe at the inner end of the displacement measuring instrument can be adjusted in distance and position relative to the center of the adjusting cylinder, the inner end of the bent bolt is screwed with a bent seat, the outer circle surface of the adjusting cylinder is fixedly connected with a stepped fixed sleeve, and both sides of the stepped fixed sleeve are also provided with knurled surfaces.

[0006] The technical solution of this invention is used as follows: One end of the orthotic rod to be bent is clamped with a fixed clamp assembly. The sliding clamp assembly can slide and adjust its linear distance relative to the fixed clamp assembly to adapt to the clamping work before bending orthotic rods of different lengths in specific operations. When the sliding clamp assembly clamps the other end of the orthotic rod, the tapered positioning post at the bottom of the sliding clamp assembly can be inserted downward into a set of corresponding positioning holes. After the sliding clamp assembly clamps the other end of the orthotic rod in place, the tapered positioning post is inserted downward into the position where the outer conical surface fits into the inner hole surface of the positioning hole. The positioning slide assembly and the rotating cylinder assembly are set together, and their positions and numbers should be equal to the surgical plan. The number of critical vertebrae (including all end vertebrae, apical vertebrae, and necessary intermediate vertebrae and inflection points) that need to be precisely traversed by the orthotic rod, as determined in the surgical procedure, is determined by the type, severity, and fixation segment of the deformity. The aim is to uniquely define a smooth and accurate three-dimensional spatial curve using the fewest possible points. This three-dimensional spatial curve requires digital preoperative planning based on three-dimensional image reconstruction and the establishment of a spatial coordinate system. The clamping assembly at one end of the orthotic rod is defined as the origin of the spatial coordinate system. In the preoperative planning, along the planned spinal sequence, a coordinate point is determined for each group of corresponding positioning slide and rotating cylinder assemblies. These points are the predetermined insertion points for the pedicle screw tail grooves, and are established preoperatively relative to the origin of the coordinate system. The three-dimensional coordinates; the side scale set on the side of the linear slide rail can determine the straight-line distance of any set of positioning slide components relative to the fixed clamp assembly, i.e., the origin of the coordinate system, and can lock after the positioning slide component moves to the position marked by the side scale; the rotating cylinder assembly can rotate 360° with damping based on the parallel fixed cylinders; the two sets of alignment threaded parts installed coaxially with their diameter as the path in the same set of adjusting rotating cylinders can be connected to both the bending bolt and the adapter seat, and the bending clamp set in the inner end of the bending bolt will not affect the disassembly and assembly of the bending bolt and the alignment threaded part; when both sets of alignment threaded parts in the same adjusting rotating cylinder are equipped with bending bolts, it can form a locking of the unbent or bent points of the orthotic bar. The bending seats at the inner ends of the two sets of bending bolts are respectively attached to the two outer circular surfaces of the unbent or already bent orthotic rod, so that the bending point of the orthotic rod can stably form the bending work; after installing the adapter in the alignment thread, in conjunction with the damped rotation of the adjusting cylinder relative to the parallel fixed cylinder, the displacement measuring instrument that is inserted and can be locked in the adapter can locate the bending distance of the orthotic rod at the bending point, that is, the bending at different axial rotation angles. In conjunction with the straight distance of the positioning slide assembly relative to the coordinate origin, each point can be positioned according to the spatial coordinates for bending work; before bending, the probe at the inner end of the displacement measuring instrument is brought into contact with the outer circular surface of the straight section of the orthotic rod and zeroed.Then, based on the bending distance and the value displayed on the indicator module at the outer end of the displacement measuring instrument, move the displacement measuring instrument to the position indicated by the bending value and lock it. Next, by tightening the bending bolt, make the inner end of the bending holder fit against the outer surface of the orthotic rod at the bending point, and continue tightening the bending bolt, causing the bending holder to compress the outer surface of the orthotic rod, gradually deforming it towards the inner probe of the displacement measuring instrument. When the deformation reaches the point where the outer surface of the orthotic rod contacts the inner probe of the displacement measuring instrument, an alarm will sound, indicating that the bending at that point is complete. Repeat this process for all points on the orthotic rod until bending is complete, then remove the orthotic rod.

[0007] Another object of the present invention is to provide a segmented bending device for a spinal orthotic bar, including the above-mentioned positioning bending mechanism with a scale, wherein the positioning slide assembly, the rotating cylinder assembly, the clamping member and the safety locking member are used in a group arranged in a manner.

[0008] The segmented bending device for spinal orthotics achieves precise segmented bending through the following process: First, the two ends of the orthotics are clamped between the fixed clamp assembly and the sliding clamp assembly, respectively. The sliding clamp assembly achieves rapid and stable initial positioning by engaging the positioning holes on the linear slide rail with its tapered positioning post at the bottom. Then, according to the preoperative planned coordinates, multiple sets of positioning slide assemblies are moved along the side scale of the linear slide rail and locked to the predetermined position. For each point to be bent, an adapter is installed on one side of the corresponding adjusting cylinder and a displacement measuring instrument is inserted to set the precise bending amount. A bending bolt and a bending seat are installed on the other side. During operation, the bending bolt is turned to push the bending seat to squeeze the orthotics, causing it to deform towards the probe of the displacement measuring instrument until it contacts the trigger signal, thus completing the quantitative bending at that point. After completing the operation at all points in sequence along the slide rail, a pre-bent orthotics matching the three-dimensional morphology of the spine can be obtained.

[0009] By adopting the above technical solution, the present invention can achieve the following beneficial effects: (1) The present invention realizes precise spatial control of the bending process of the orthotic rod through an integrated scale and positioning system; the side scale on the linear slide rail cooperates with the positioning slide assembly to accurately set the longitudinal position of the bending point; the rotating cylinder assembly can determine the bending direction by relying on the rotation of the parallel fixed cylinder and the angle adjustment scale on it; the displacement measuring instrument installed through the adapter can preset and monitor the bending displacement; these three systems (linear, angle, displacement) together construct a simple spatial coordinate system with the fixed clamp assembly as the origin, so that doctors can strictly follow the data of the three-dimensional preoperative planning and transform the abstract model into the actual situation. The specific and quantifiable bending operation of the orthotic rod greatly improves the accuracy of the orthosis and the predictability of the surgery; (2) The present invention can realize the parameterized and segmented precise bending of the orthotic rod; the three-dimensional digital preoperative planning spatial coordinates are decomposed and mapped to the three physical scale systems of the device: first, move along the linear slide rail and lock the positioning slide assembly to set the longitudinal position of the bending point; second, rotate the adjusting cylinder and determine the bending direction according to the angle adjustment scale; finally, preset and monitor the bending amount through the displacement measuring instrument on the adapter seat; for each bending point, operate the bending bolt to drive the bending chuck to apply force to the rod until its deformation reaches the preset value, that is, the bending of the point is completed.By sequentially executing all planned points, a personalized orthotic bar that precisely matches the three-dimensional morphology of the patient's spine is finally obtained; (3) This invention innovatively integrates measurement and execution functions into the same workstation to form an efficient closed-loop control; During operation, a displacement measuring instrument can be installed on the alignment threaded part and a bending value can be preset to make it a target limiter. Then, a bending bolt is screwed into another pair of alignment threaded parts to push the bending chuck to squeeze the orthotic bar. During the bending process, the displacement measuring instrument provides real-time feedback, and the deformation reaches the preset value to indicate completion; This "set-execute-feedback-termination" mode replaces the traditional method that relies on experience and visual inspection, improves the accuracy to the instrument level, avoids under-bending or over-bending, and saves the tediousness of repeated verification, significantly improving efficiency and reliability; (4) The design of this invention is highly modular and flexible, and can adapt to diverse clinical needs. The sliding chuck assembly can be adjusted along the linear slide rail to adapt to orthotic bars of different lengths. The conical positioning column and positioning chuck hole at the bottom ensure stable positioning after clamping; Positioning slide The components and rotating cylinder components can be flexibly configured according to the number of key surgical points (such as the top vertebra and inflection point) to support the shaping of complex three-dimensional spatial curves; the double-aligned threaded part on the adjusting rotating cylinder serves as the core interface, and can be flexibly replaced with bending bolts or displacement measuring instruments to achieve rapid switching of measurement and bending functions; this strong adaptability enables it to meet the complex requirements for the shape of the orthotic rod in individualized surgery; (5) Through the mechanical structure and scale system, the present invention transforms the bending of the orthotic rod from "operation by the skills of medical staff" into a parameterized and standardized "process". The side scale, angle adjustment scale and displacement measuring instrument constitute a complete parameter recording system, so that the key data (distance, angle and displacement) of each bending point can be found, ensuring the accuracy of a single operation and the repeatability of batch processing; at the same time, the insertion and locking of the conical positioning column and the positioning card hole, as well as the damping rotation of the adjusting rotating cylinder, effectively prevent accidental displacement during operation and ensure the stability of the process; this high degree of controllability and repeatability significantly reduces the surgical risk caused by the deviation of instrument preparation. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the base component of the present invention; Figure 3 is a front view of the clamping assembly and linear slide rail of the present invention; Figure 4 is a schematic diagram of the structure of the clamping assembly of the present invention; Figure 5 is a schematic diagram of the structure of the retaining clamp seat and retaining sliding wedge seat of the present invention; Figure 6 is a schematic diagram of the structure of the sliding clamp assembly of the present invention; Figure 7 is a schematic diagram of the connection structure of the internal gear part of the present invention; Figure 8 is a front view of the square slider part of the present invention; Figure 9 is a schematic diagram of the structure of the positioning slide assembly of the present invention; Figure 10 is a front view of the positioning slide assembly of the present invention; Figure 11 is a schematic diagram of the installation structure of the rotating cylinder assembly of the present invention; Figure 12 is an exploded view of the rotating cylinder assembly of the present invention; Figure 13 is a schematic diagram of the installation of the clamping component part of the present invention; Figure 14 is a schematic diagram of the structure of the clamping component and safety locking component from a first perspective of the present invention; Figure 15 is a schematic diagram of the structure of the clamping component and safety locking component from a second perspective of the present invention.

[0012] Reference numerals: 1. Base component; 2. Fixing clamp assembly; 3. Sliding clamp assembly; 4. Positioning slide assembly; 5. Rotating cylinder assembly; 6. Clamping component; 7. Safety locking component; 101. Bottom fixing plate; 102. Linear slide rail; 103. Top slide groove; 104. Side slide groove; 105. Positioning hole; 106. Top scale; 107. Side scale; 201. Bottom fixing seat; 202. Fixing clamp seat; 203. Fixing wedge seat; 204. Fixing threaded part; 205. Fixing locking bolt; 206. Fixing sliding wedge seat; 207. Fixing rotating sleeve; 208. Fixing... 209. Positioning clamp shaft; 210. Positioning screw seat; 211. Positioning groove; 212. Positioning slider; 301. Bottom sliding seat; 302. Sliding position clamp seat; 303. Sliding position wedge seat; 304. Sliding position threaded part; 305. Sliding position locking bolt; 306. Sliding position sliding wedge seat; 307. Sliding position screw sleeve; 308. Sliding position clamp shaft; 309. Sliding position clamp; 310. Sliding position screw seat; 311. Sliding position groove; 312. Sliding position slider; 313. Vertical groove; 314. Square slider; 315. Conical positioning post; 316. Gear sleeve; 317. Internal gear; 318. Rotating groove; 319. Sliding groove; 320. Sliding block; 321. Inner insert block; 322. Follower rack; 323. Preload spring; 324. Scale indicator line; 401. Side connecting arm; 402. Side slider; 403. Locking threaded part; 404. Locking bolt; 405. Parallel fixed cylinder; 406. Side pointer; 501. Angle adjustment groove; 502. Angle adjustment scale; 503. Adjusting cylinder; 504. Rotating table; 505. Stepped fixed sleeve; 506. Knurled surface; 507. Alignment threaded part 508. Angle adjustment indicator; 509. Bending bolt; 510. Adapter; 511. Displacement measuring instrument; 512. Set thread; 513. Hand-tightening bolt; 514. Bending seat; 601. Pressing seat; 602. Pressing groove; 603. Wedge block; 604. Wedge sliding column; 605. Wrench arm; 606. Wrench block groove; 607. Wrench arm bearing; 608. Wrench arm shaft; 609. Outer seat; 610. Irregular compression spring; 701. Safety sleeve; 702. Relief groove; 703. Relief groove; 704. Relief slider; 705. Top spring. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] As shown in Figures 1-15, a positioning bending mechanism with scales is described. The linear slide rail 102 in the base component 1 is made of a metal profile with a certain rigidity. Positioning holes 105 are vertically arranged in the body of the linear slide rail 102. Side scales 107 are provided on both sides of the linear slide rail 102. The bottom end of the main body of the fixed clamp assembly 2 is fixedly connected to the end position of the linear slide rail 102. The bottom end of the main body of the sliding clamp assembly 3 is slidably connected to the top of the linear slide rail 102, and the sliding clamp assembly 3 can be adjusted in a linear distance relative to the fixed clamp assembly 2. An orthotic rod is clamped between the fixed clamp assembly 2 and the sliding clamp assembly 3. A tapered positioning post 315 is vertically slidably connected to the main body of the sliding clamp assembly 3. At the bottom, when the sliding clamp assembly 3 clamps the orthopedic rod, the tapered positioning post 315 can be simultaneously inserted into any of the corresponding positioning holes 105; the positioning slide assembly 4 is linearly arranged and slidably connected to the linear slide rail 102, the side connecting arms 401 are distributed in pairs, the bottom end of the side connecting arm 401 on the same side is slidably connected to the side of the linear slide rail 102, and the top ends of the side connecting arms 401 are fixedly connected side by side to parallel non-contacting fixed cylinders 405, the adjusting cylinder 503 is damped and screwed between the parallel fixed cylinders 405, one set of parallel fixed cylinders 405 is provided with an angle adjustment scale 502 on the outer circumference, and the main body of the adjusting cylinder 503 is coaxially installed and fixed with its diameter as the path of the alignment thread 507. A pair of bending bolts 509 are connected to the symmetrically distributed alignment threaded portions 507, or a bending bolt 509 and an adapter 510 are connected. A displacement measuring instrument 511 is positioned and fixedly inserted into the adapter 510, allowing the monitoring probe at the inner end of the displacement measuring instrument 511 to adjust its distance relative to the center of the adjusting cylinder 503. A bending clamp 514 is screwed onto the inner end of the bending bolt 509. The working principle is as follows: Before clamping, the straightness of the straightening rod to be bent is within the acceptable range; the adverse effects of a straightening rod with unacceptable straightness on subsequent bending work must be eliminated. One end of the straightening rod to be bent is clamped to the fixed clamp assembly 2, which has a fixed position. The sliding clamp assembly 3 can be positioned relative to the fixed clamp. The linear distance of component 2 is adjusted by sliding to accommodate clamping work before bending orthotic rods of different lengths during specific operations; when the sliding clamp component 3 clamps the other end of the orthotic rod, the tapered positioning post 315 at the bottom of the sliding clamp component 3 can be inserted downward into a set of positioning holes 105 directly opposite each other; and after the sliding clamp component 3 clamps the other end of the orthotic rod in place, the tapered positioning post 315 is inserted downward into the position where the outer tapered surface fits into the inner hole surface of the positioning hole 105; that is, while the sliding clamp component 3 clamps the end of the orthotic rod away from the fixed clamp component 2, it can also form a positioning and clamping operation of the sliding clamp component 3 itself relative to the linear slide rail 102.The positioning holes 105 on the linear slide rail 102 provide several discrete, equally spaced reference positioning points for the sliding clamp assembly 3. During actual clamping operations, medical personnel simply move the sliding clamp assembly 3 to the positioning hole 105 closest to the required length of the orthotic rod. The resulting deviation has a controllable impact on the accuracy of subsequent bending operations. The positioning slide assembly 4 and the rotating cylinder assembly 5 are set up in groups, and their positions and numbers should be equal to the number of all key vertebrae (including all end vertebrae, apical vertebrae, and necessary intermediate vertebrae and inflection points) that need to be accurately passed through by the orthotic rod as determined in the surgical plan. It is determined by the type and severity of the deformity. The degree and fixed segment are jointly determined, aiming to uniquely define a smooth and accurate three-dimensional spatial curve with the fewest points. This three-dimensional spatial curve requires digital preoperative planning based on three-dimensional image reconstruction and the establishment of a spatial coordinate system, which is existing technology. The clamping component 2 at one end of the orthopedic rod is defined as the starting origin of the spatial coordinate system. In the preoperative planning, along the planned spinal sequence, a coordinate point is determined for each group of corresponding positioning slide components 4 and rotating cylinder components 5. These points are the predetermined insertion points of the pedicle screw tail groove, and a three-dimensional coordinate relative to the origin of the coordinate system is formed preoperatively. The side scale is set on the side of the linear slide rail 102. 107 can determine the straight-line distance between any set of positioning slide assembly 4 and the fixed clamp assembly 2, i.e., the origin of the coordinate system, and can lock after the positioning slide assembly 4 moves to the position marked by the side scale 107; the rotating cylinder assembly 5 can rotate 360° with damping based on the parallel fixed cylinder 405; the two sets of alignment threaded parts 507 installed coaxially with their diameter as the path in the same set of adjusting cylinders 503 can be connected to both the bending bolt 509 and the adapter 510, and the bending retainer 514 set at the inner end of the bending bolt 509 will not affect the disassembly and assembly of the bending bolt 509 and the alignment threaded part 507, i.e., the bending retainer The outer contour of 514 is smaller than the maximum outer diameter of the bending bolt 509. When both sets of alignment threaded parts 507 in the same adjusting cylinder 503 are equipped with bending bolts 509, they can be used to secure the unbent or bent points of the orthopedic rod. That is, the bending seats 514 at the inner ends of the two sets of bending bolts 509 are respectively attached to the two outer circular surfaces of the unbent or bent orthopedic rod, so that the bending points of the orthopedic rod can stably form the bending operation. Moreover, the inner dimensions of the adjusting cylinder 503 and the bending bolts 509 or displacement measuring instruments 511 connected in the alignment threaded parts 507 can adapt to the maximum bending distance of the orthopedic rod.After installing the adapter 510 in the alignment threaded part 507, and cooperating with the damped rotation of the adjusting cylinder 503 relative to the parallel fixed cylinder 405, the displacement measuring instrument 511, which is inserted into and can be locked in the adapter 510, can locate the bending distance of the bending point of the straightening rod, that is, the bending of the point at different axial rotation angles. Combined with the linear distance of the positioning slide assembly 4 relative to the coordinate origin, each point can be positioned according to spatial coordinates for bending. Before bending, the probe at the inner end of the displacement measuring instrument 511 is... The outer circular surface of the straight section of the orthotic bar contacts and is zeroed; then, based on the bending distance and the value displayed on the indicator module at the outer end of the displacement measuring instrument 511, the displacement measuring instrument 511 is moved to the position indicated by the bending value and locked; then, by tightening the bending bolt 509, the inner end of the bending holder 514 is brought into contact with the outer circular surface of the orthotic bar at the bending point, and the bending bolt 509 is continued to be tightened, so that the bending holder 514 forms a compression on the outer circular surface of the orthotic bar, causing it to gradually deform towards the direction of the inner probe of the displacement measuring instrument 511, when... When the deformation and bending of the orthotic bar reaches the point where its outer surface contacts the inner probe of the displacement measuring instrument 511, an alarm is triggered, indicating that the bending at that point is complete. After bending all points of the orthotic bar as described above, move the bending holder 514 and the displacement measuring instrument 511 in the rotating cylinder assembly 5 to a position that does not interfere with their removal. Loosen the clamping of the fixed clamp assembly 2 and the sliding clamp assembly 3, and remove the orthotic bar. The displacement measuring instrument 511 is a conventional displacement or deformation measuring device in the art, such as a digital dial indicator or an inductive micrometer, which uses a built-in electronic sensor. The instrument converts the linear displacement generated by the probe contacting the surface of the object being measured (such as an orthotic rod) into a readable electrical signal value. This instrument is detachably mounted on the adjusting cylinder 503 via an adapter 510, with its probe facing the direction of force application to the bending holder 514. It is used to monitor the deformation of the orthotic rod relative to its initial position during bending operations, thereby providing precise quantitative feedback for the bending process. Improvements to the instrument's structure and measurement principle are not within the scope of this invention; this invention only relates to its innovative application and synergistic setup within this specific mechanism.

[0016] The specific structures of the base component 1, the fixed clamp assembly 2, and the sliding clamp assembly 3 are shown in Figures 2, 3, 4, 5, 6, 7, and 8. A bottom plate 101 is fixed to the bottom end of the linear slide rail 102 to improve operational stability. A top groove 103 is formed at the top of the linear slide rail 102, and side grooves 104 are formed on both sides of the linear slide rail 102. A positioning hole 105 is formed between the bottom end of the top groove 103 and the partition cavity of the linear slide rail 102. A top scale 106 is provided at the top of the linear slide rail 102 to indicate and control the movement distance of the sliding clamp assembly 3 relative to the fixed clamp assembly 2. Gratings are provided on the lower ends of both sides of the bottom sliding seat 301. Indicator line 324 is used in conjunction with top scale 106 to indicate the relative distance between sliding clamp assembly 3 and fixed clamp assembly 2 (starting coordinate origin); bottom base 201 serves as the main body for fixing clamp assembly 2, its bottom end is fixedly connected to one end of top sliding groove 103, fixed clamp seat 202 is screwed onto one side of the top end of bottom base 201, and fixed wedge seat 203 is fixed to the other side of the bottom end of fixed clamp seat 202. Fixed thread part 204 is installed and fixed on the upper part of the main body of bottom base 201, fixed locking bolt 205 is threaded into fixed thread part 204, and fixed sliding wedge seat 206 is slidably connected to the outer inclined surface of fixed wedge seat 203. The inner inclined surface fits against the outer inclined surface of the retaining wedge seat 203. The retaining locking bolt 205 passes through the other end of the main body of the bottom retaining seat 201 and is screwed onto the retaining sleeve 207. After the retaining clamp seat 202 is engaged with the bottom retaining seat 201, tightening the retaining locking bolt 205 allows the retaining sleeve 207 to fit against the outside of the retaining sliding wedge seat 206. As the retaining locking bolt 205 is further tightened, the inner inclined surface of the retaining sliding wedge seat 206 can be pressed against the outer inclined surface of the retaining wedge seat 203. The vertical pressure separated by the pressing force can drive the retaining clamp seat 202 to form a clamping action. A retaining clamp shaft 20 is horizontally inserted and fixed on one side of the top of the bottom retaining seat 201. 8. A positioning screw seat 210 is fixedly connected to one side of the bottom end of the positioning clamp seat 202, and the positioning screw seat 210 is screwed to the positioning clamp shaft 208; a positioning sleeve 209 is fixedly connected to the top groove of the bottom fixed seat 201 and the bottom groove of the positioning clamp seat 202. The positioning sleeve 209 is made of a soft material with a hardness less than that of the orthopedic rod, which allows the orthopedic rod to be clamped without damage after the positioning clamp seat 202 is clamped relative to the bottom fixed seat 201; a positioning groove 211 is symmetrically opened on the inclined surface of the outer side of the positioning wedge seat 203, and a positioning slider 212 is symmetrically fixed on the inclined surface of the inner side of the positioning sliding wedge seat 206. The positioning slider 212 on the same side is slidably connected to the positioning groove 211 and will not detach.Both the retaining wedge seat 203 and the retaining sliding wedge seat 206 have notches at their bottom ends that are directly opposite the retaining locking bolt 205. These notches are used to engage with the retaining locking bolt 205 after the retaining clamp seat 202 is engaged, allowing the retaining sleeve 207 to form a compression fit with the retaining sliding wedge seat 206. The sliding clamp assembly 3 is a structural optimization based on the retaining clamp assembly 2. Similarly, the bottom sliding seat 301 serves as the main body for the sliding clamp assembly 3, with its bottom end slidably connected to the other end of the top sliding groove 103. The sliding position clamp seat 302 is screwed onto one side of the top end of the bottom sliding seat 301, and a sliding position is fixed to the other side of the bottom end of the sliding position clamp seat 302. The wedge-shaped seat 303 and the upper part of the main body of the bottom sliding seat 301 are fixed with a sliding threaded part 304. The sliding locking bolt 305 is threaded into the sliding threaded part 304. A sliding wedge-shaped seat 306 is slidably connected to the outer inclined surface of the sliding wedge-shaped seat 303. The inner inclined surface of the sliding wedge-shaped seat 306 fits against the outer inclined surface of the sliding wedge-shaped seat 303. The other end of the sliding locking bolt 305, which passes through the main body of the bottom sliding seat 301, is screwed with a sliding sleeve 307. A sliding clamping shaft 308 is horizontally inserted and fixed to one side of the top of the bottom sliding seat 301. A sliding sleeve 31 is fixed to one side of the bottom of the sliding clamping seat 302. 0. The sliding position rotating seat 310 is screwed to the sliding position clamping shaft 308; a sliding position clamping sleeve 309 is fixedly connected to the top groove of the bottom sliding seat 301 and the bottom groove of the sliding position clamping seat 302. Similarly, the sliding position clamping sleeve 309 is made of a soft material with a hardness less than that of the orthopedic rod; a sliding position groove 311 is symmetrically opened on the outer inclined surface of the sliding position wedge seat 303, and a sliding position slider 312 is symmetrically fixed on the inner inclined surface of the sliding position sliding wedge seat 306. The sliding position slider 312 on the same side is slidably connected to the sliding position groove 311 and will not detach; the bottom ends of the sliding position wedge seat 303 and the sliding position sliding wedge seat 306 are both provided with locking mechanisms for the sliding position. The notch directly opposite the bolt 305; a vertical sliding groove 313 is vertically provided in the main body of the bottom sliding seat 301, the square slider 314 is slidably connected in the vertical sliding groove 313, and the conical positioning post 315 is fixedly connected to the bottom end of the square slider 314; gear sleeves 316 are fixedly installed on the two side walls of the vertical sliding groove 313 at the position directly opposite the sliding position locking bolt 305, and both sets of gear sleeves 316 extend into the inner cavity of the vertical sliding groove 313; sliding grooves 319 are evenly provided on the non-threaded outer circular surface of the sliding position locking bolt 305; sliding blocks 320 are evenly fixed in the inner hole of the internal gear 317, and the internal gear 317 is slidably connected in the sliding groove 319 through the sliding blocks 320;Both ends of the internal gear 317 are provided with rotating grooves 318. The rotating groove 318 on the same side is screwed into the inner end of the gear sleeve 316. This allows the internal gear 317 to rotate as the sliding locking bolt 305 is turned, in conjunction with the sliding engagement between the internal gear 317 and the sliding locking bolt 305, and the screw engagement with the gear sleeve 316. The top of the square slider 314 is fixedly connected to a follower rack 322, which meshes with the internal gear 317. The inner insert block 32... 1. Inserted into the inner cavity of the vertical sliding groove 313 through its side wall, the preload spring 323 is secured at one end to the inner insert block 321 and at the other end to the square slider 314. The elastic force provided by the preload spring 323 can prevent the sliding locking bolt 305 from loosening through the cooperation of the follower rack 322 and the internal gear 317. After the sliding clamp seat 302 is engaged with the bottom sliding seat 301, after the sliding clamp assembly 3 moves to the position directly opposite any set of positioning holes 105, rotate... After the sliding sleeve 307 and the sliding wedge seat 306 are in contact, further tightening of the sliding locking bolt 305 can create a pressing action between the inner inclined surface of the sliding wedge seat 306 and the outer inclined surface of the sliding wedge seat 303. The vertical pressure separated by the pressing force can drive the sliding clamp seat 302 to perform a clamping action. Simultaneously, the action of tightening the sliding locking bolt 305 can also cause the internal gear 317 and the follower to engage. The rack and pinion 322 forms a meshing transmission, causing the square slider 314 and the conical positioning post 315 to move downwards. Since the conical positioning post 315 is a tapered cylinder with a larger top and smaller bottom, it guides the conical positioning post 315 to gradually fit against the inner wall of the positioning hole 105, automatically compensating for minor alignment deviations. After the sliding clamping seat 302 is clamped in place, the conical positioning post 315 is precisely inserted into the position where it fits tightly against the positioning hole 105, achieving a safe and stable connection between the sliding clamping assembly 3 and the linear slide rail 102.

[0017] The specific structures of the positioning slide assembly 4 and the rotating cylinder assembly 5 are shown in Figures 9, 10, 11, and 12. A side slider 402 is fixed to the bottom end of each set of side connecting arms 401, and the side sliders 402 on the same side are slidably connected in the side sliding groove 104. A locking threaded part 403 is installed and fixed in the middle of the side slider 402, and a locking bolt 404 is threaded into each set of locking threaded parts 403. After the positioning slide assembly 4 slides to the set position, the locking bolt 404 is tightened to lock the position. 4. The inner surface of the side slide groove 104 is pressed against the side slide groove 104 to lock the sliding position of the positioning slide assembly 4; a side pointer 406 is also fixedly installed at the lower end of each set of side connecting arms 401. The side pointer 406 on the same side works with the side scale 107 to mark the sliding position of the positioning slide assembly 4 relative to the fixed clamp assembly 2 (starting coordinate origin); both ends of the adjusting cylinder 503 are fixed with a rotating table 504, and the inner end of each set of parallel fixed cylinders 405 is provided with an angle adjusting groove 501. The rotating platform 504 on the side is screwed into the angle adjustment groove 501. The two sets of parallel fixed cylinders 405 in the same positioning slide assembly 4 can provide space for the 360° rotation of the adjustment cylinder 503 and the components installed in the adjustment cylinder 503. The stepped fixed sleeve 505 is fixed to the outer circumference of the adjustment cylinder 503. An angle adjustment indicator point 508 is provided on one end face of the adjustment cylinder 503. The angle adjustment indicator point 508 is used in conjunction with the angle adjustment scale 502 to form a control for the adjustment cylinder 503. The adapter 510 also includes a bending bolt 509 and an indicator of the rotation angle of the displacement measuring instrument 511. A set screw 512 is installed and fixed in the main body of the adapter 510. A hand-tightening bolt 513 is threaded into the set screw 512. By tightening the hand-tightening bolt 513, the inner end of the hand-tightening bolt 513 is pressed against the outside of the displacement measuring instrument 511, which can lock and loosen the position of the displacement measuring instrument 511. Both sides of the stepped fixed sleeve 505 are also provided with knurled surfaces 506.

[0018] The specific structures of the clamping component 6 and the safety locking component 7 used to achieve the stability of the rotation angle adjustment and positioning of the adjusting cylinder 503 are shown in Figures 1, 13, 14, and 15. The clamping seats 601 are used in pairs and are respectively provided with the outer side of the knurled surface 506. The top of each set of side connecting arms 401 is provided with a clamping groove 602 laterally. The clamping seats 601 on the same side are elastically slidably connected to the clamping groove 602, so that the clamping seats 601 naturally move away from the knurled surface 506. The inclined block 603 is fixedly connected to the top of the main body of the clamping seat 601. The top of each set of side connecting arms 401 is screwed with an inclined sliding cutting column 604. The inclined arc surface of the inclined sliding cutting column 604 is slidably tangent to the outer inclined surface of the inclined block 603. The top of the side connecting arm 401 is fixedly mounted. The device is equipped with a wrench bearing seat 607, in which a wrench shaft 608 is screwed. A beveled sliding cutting post 604 is fixed to the inner end of the wrench shaft 608, and a wrench 605 is fixed to the outer end of the wrench shaft 608. An outer retainer 609 is fixed to the outer end of the main body of the clamping seat 601. A shaped compression spring 610 is sleeved and installed in the main body of the clamping seat 601, with one end fixed to the outer retainer 609 and the other end fixed to the side of the side connecting arm 401, so as to form an elastic movement of the clamping seat 601 away from the knurled surface 506. The top end of the side connecting arm 401 has a beveled block groove 606 that communicates with the clamping groove 602, which provides space for the engagement of the beveled block 603 and the beveled sliding cutting post 604. Both ends of the safety sleeve 701 are fixed with relief sliders 704. The main body of 01 has a clearance groove 702 with clearance grooves 703 on both sides. The clearance slider 704 on the same side is slidably connected to the clearance groove 703. One end of the top spring 705 is locked to the safety sleeve 701, and the other end is locked to the bottom end of the clearance groove 702. Under the action of the elastic force of the top spring 705, the component formed by the clearance slider 704 and the safety sleeve 701 can naturally and elastically move upward. When the clamping seat 601 is used to secure the current rotation position of the adjusting cylinder 503 and the knurled surface 506, the lever 605 on one side is first moved to drive the rotation of the inclined sliding column 604, and at the same time, the clearance slider 704 is pressed down, so that the inner end of the clamping seat 601 on the current side is pressed against the knurled surface on one side. After 506 is in position, the tail end of the lever 605 is aligned with the locking hole of the safety sleeve 701. After releasing the clearance slider 704, the safety sleeve 701 can spring upward and lock the lever 605, thus restricting the current pressing seat 601 to a position close to one of the knurled surfaces 506. Based on the above, the pressing seat 601 on the other side is locked outside the knurled surface 506 on the other side. The pressing seats 601 used in pairs on both sides can form a safe locking of the rotation position of the adjusting cylinder 503 and the knurled surface 506. The side connecting arm 401 not only has a pressing groove 602 and a clearance groove 702 for sliding with the required components, but also has a segmented isolation cavity. The purpose is to achieve weight reduction while ensuring structural rigidity.

[0019] Finally, it should be noted that the operational description of the mechanism in this specification is limited to its function as a processing instrument. Any specific medical steps involving preoperative disinfection, intraoperative implantation, etc., fall within the scope of independent prior art and are not part of the technical solutions claimed in this invention. The above embodiments are only used to illustrate the technical solutions of this invention and are not intended to limit it. Although this invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this invention.

Claims

1. A positioning bending mechanism with a scale, comprising a base component (1), a fixing clamp assembly (2), and a sliding clamp assembly (3), characterized in that: It also includes a positioning slide assembly (4) and a rotating cylinder assembly (5); the base component (1) includes a linear slide rail (102) and positioning holes (105), the sliding clamp assembly (3) includes a tapered positioning post (315), the positioning holes (105) are arranged in the body of the linear slide rail (102), and side scales (107) are provided on both sides of the linear slide rail (102); the bottom of the main body of the fixed clamp assembly (2) is fixedly connected to the end position of the linear slide rail (102), the bottom of the main body of the sliding clamp assembly (3) is slidably connected to the top of the linear slide rail (102), and the tapered positioning post (315) is slidably connected to the bottom of the main body of the sliding clamp assembly (3); the positioning slide assembly (4) includes a side connecting arm (401), the rotating cylinder assembly (5) includes a bending bolt (509), an adapter (510) and a displacement measuring instrument (511), and the positioning slide assembly (4) is arranged in a straight line. In the linear slide rail (102), the side connecting arms (401) are distributed in pairs. The bottom end of the side connecting arm (401) on the same side is slidably connected to the side of the linear slide rail (102). The top ends of the side connecting arms (401) are fixedly connected to the parallel fixed cylinders (405). The parallel fixed cylinders (405) are damped and screwed together with the adjusting cylinders (503). An angle adjustment scale (502) is provided on the outer circle surface of one set of parallel fixed cylinders (405). The main body of the adjusting cylinder (503) is symmetrically installed and fixed with the alignment threaded part (507). The symmetrically distributed alignment threaded part (507) is connected with a pair of bent bolts (509), or connected with bent bolts (509) and adapter (510). The adapter (510) can be positioned and fixedly connected to the displacement measuring instrument (511). The inner end of the bent bolt (509) is screwed with a bent clamp (514).

2. The positioning bending mechanism with a scale according to claim 1, characterized in that: The base component (1) also includes a top slide groove (103), which is opened at the top of the linear slide rail (102). Side slide grooves (104) are opened on both sides of the linear slide rail (102), and a top scale (106) is provided at the top of the linear slide rail (102).

3. The positioning bending mechanism with a scale according to claim 2, characterized in that: The clamping assembly (2) includes a bottom base (201), a retaining clamp seat (202), and a retaining locking bolt (205). The bottom end of the bottom base (201) is fixedly connected to one end of the top sliding groove (103). The retaining clamp seat (202) is screwed onto one side of the top end of the bottom base (201). A retaining wedge seat (203) is fixed to the other side of the bottom end of the retaining clamp seat (202). A retaining threaded part (204) is installed and fixed on the upper part of the main body of the bottom base (201). The retaining locking bolt (205) is connected in the retaining threaded part (204). A retaining sliding wedge seat (206) is slidably connected to the outer inclined surface of the retaining wedge seat (203). The retaining locking bolt (205) passes through the main body of the bottom base (201). The other end of the body is screwed with a retaining sleeve (207); a retaining clamp shaft (208) is inserted and fixed on one side of the top of the bottom base (201), a retaining screw seat (210) is fixed on one side of the bottom of the retaining clamp seat (202), the retaining screw seat (210) is screwed with the retaining clamp shaft (208), a retaining sleeve (209) is fixed in the top groove of the bottom base (201) and the bottom groove of the retaining clamp seat (202), a retaining groove (211) is symmetrically opened on the inclined surface of the outer side of the retaining wedge seat (203), a retaining slider (212) is symmetrically fixed on the inclined surface of the inner side of the retaining sliding wedge seat (206), and the retaining slider (212) on the same side is slidably connected to the retaining groove (211).

4. A positioning bending mechanism with a scale according to claim 2 or 3, characterized in that: The sliding clamp assembly (3) also includes a bottom sliding seat (301), a sliding position clamp seat (302), and a sliding position locking bolt (305). The bottom end of the bottom sliding seat (301) is slidably connected to the other end of the top sliding groove (103). The sliding position clamp seat (302) is screwed onto one side of the top end of the bottom sliding seat (301). A sliding position wedge seat (303) is fixed on the other side of the bottom end of the sliding position clamp seat (302). A sliding position threaded part (304) is installed and fixed on the upper part of the main body of the bottom sliding seat (301). The sliding position locking bolt (305) is connected in the sliding position threaded part (304). A sliding position sliding wedge seat (306) is slidably connected on the outer inclined surface of the sliding position wedge seat (303). A sliding position sleeve is screwed onto the other end of the sliding position locking bolt (305) that passes through the main body of the bottom sliding seat (301). (307) A sliding position clamping shaft (308) is inserted and fixed on one side of the top of the bottom sliding seat (301). A sliding position rotating seat (310) is fixed on one side of the bottom of the sliding position clamping seat (302). The sliding position rotating seat (310) is screwed to the sliding position clamping shaft (308). A sliding position sleeve (309) is fixed in the top groove of the bottom sliding seat (301) and the bottom groove of the sliding position clamping seat (302). A sliding position groove (311) is symmetrically opened on the inclined surface of the outer side of the sliding position wedge seat (303). A sliding position slider (312) is symmetrically fixed on the inclined surface of the inner side of the sliding position sliding wedge seat (306). The sliding position slider (312) on the same side is slidably connected to the sliding position groove (311). A scale indicator line (324) is provided in the middle of the lower end of both sides of the bottom sliding seat (301).

5. A positioning bending mechanism with a scale according to claim 4, characterized in that: The sliding clamp assembly (3) also includes a square slider (314), an internal gear (317), an inner insert block (321), and a preload spring (323). A vertical sliding groove (313) is provided in the main body of the bottom sliding seat (301). The square slider (314) is slidably connected in the vertical sliding groove (313). A tapered positioning post (315) is fixed to the bottom end of the square slider (314). Gear sleeves (316) are fixedly installed on both sides of the vertical sliding groove (313). Sliding grooves (319) are evenly provided on the outer surface of the sliding locking bolt (305). Sliding blocks are evenly fixed in the inner hole of the internal gear (317). 320), the internal gear (317) is slidably connected in the sliding groove (319) through the sliding block (320). Both ends of the internal gear (317) are provided with rotating grooves (318). The rotating groove (318) on the same side is screwed to the inner end of the gear sleeve (316). The top of the square slider (314) is fixed with a follower rack (322). The follower rack (322) meshes with the internal gear (317). The inner insert block (321) passes through the side wall of the vertical sliding groove (313) and is inserted into its inner cavity. One end of the preload spring (323) is locked with the inner insert block (321), and the other end is locked with the square slider (314).

6. A positioning bending mechanism with a scale according to claim 2, 3 or 5, characterized in that: The positioning slide assembly (4) also includes a locking thread (403), a side slider (402) is fixed at the bottom of each set of side connecting arms (401), the side sliders (402) on the same side are slidably connected in the side slide groove (104), the locking thread (403) is installed and fixed in the middle of the side slider (402), a locking bolt (404) is connected in each set of locking thread (403), and a side pointer (406) is also installed and fixed at the lower end of each set of side connecting arms (401).

7. A positioning bending mechanism with a scale according to claim 1, 2, 3 or 5, characterized in that: The rotary cylinder assembly (5) also includes a stepped fixed sleeve (505). Both ends of the adjusting rotary cylinder (503) are fixed with rotary tables (504). The inner end of each set of parallel fixed cylinders (405) is provided with an angle adjustment groove (501). The rotary tables (504) on the same side are screwed to the angle adjustment groove (501). The stepped fixed sleeve (505) is fixed to the outer circle surface of the adjusting rotary cylinder (503). An angle adjustment indicator point (508) is provided on one end face of the adjusting rotary cylinder (503). A set screw thread (512) is installed and fixed in the main body of the adapter (510). A hand-tightening bolt (513) is connected in the set screw thread (512). Both sides of the stepped fixed sleeve (505) are also provided with knurled surfaces (506).

8. A positioning bending mechanism with a scale according to claim 1, 2, 3 or 5, characterized in that: It also includes a clamping component (6), which includes a clamping seat (601), a wedge (603), a lever (605), and a shaped compression spring (610). Each set of side connecting arms (401) has a clamping groove (602) horizontally opened at the top. The clamping seat (601) on the same side is elastically slidably connected to the clamping groove (602). The wedge (603) is fixed to the top of the main body of the clamping seat (601). Each set of side connecting arms (401) has a beveled sliding column (604) screwed to the top. The inclined arc surface of the beveled sliding column (604) is connected to the wedge (603). The outer inclined surface is tangentially slidably connected to the side. The top end of the side connecting arm (401) is fixedly installed with a wrench shaft seat (607). A wrench shaft (608) is screwed into the wrench shaft seat (607). The inclined sliding cutting column (604) is fixedly connected to the inner end of the wrench shaft (608). The wrench (605) is fixedly connected to the outer end of the wrench shaft (608). An outer clamping seat (609) is fixed to the outer end of the main body of the pressing seat (601). A special-shaped compression spring (610) is sleeved and installed in the main body of the pressing seat (601), with one end clamped to the outer clamping seat (609) and the other end clamped to the side of the side connecting arm (401).

9. A positioning bending mechanism with a scale according to claim 8, characterized in that: It also includes a safety locking component (7), which includes a safety sleeve (701), a clearance groove (702) and a top spring (705). Both ends of the safety sleeve (701) are fixed with clearance sliders (704). The clearance groove (702) provided in the main body of the side connecting arm (401) is provided with clearance slide grooves (703) on both sides. The clearance sliders (704) on the same side are slidably connected to the clearance slide grooves (703). One end of the top spring (705) is locked with the safety sleeve (701), and the other end is locked with the bottom end of the clearance groove (702).

10. A segmented bending device for a spinal orthotic bar, characterized in that: The positioning bending mechanism with a scale as described in claim 9 is provided, wherein the positioning carriage assembly (4), the rotating cylinder assembly (5), the clamping member (6), and the safety locking member (7) are used in a group arranged in a specific manner.

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