Orthodontic maxillary distractor

Abstract

This invention relates to the field of maxillary orthodontics and discloses an orthodontic maxillary traction device, comprising a horizontal bar, several adjusting blocks slidably connected to the outer wall of the horizontal bar, support rods slidably connected to the outer walls of the adjusting blocks, and vertical rods slidably connected to the outer walls of the adjusting blocks. This invention utilizes the elastic potential energy accumulated by a rubber band to generate pressure on a sliding block, causing the sliding block to move towards the horizontal bar. At this time, the spring changes from a free state to a compressed state, accumulating elastic potential energy. When the elasticity of the rubber band decreases, the pressure of the rubber band on the sliding block decreases, allowing the spring to release some elastic potential energy to compensate for the lost elastic potential energy of the rubber band. This reduces the rate of elasticity decay of the rubber band, effectively preventing the problem of rapid elasticity decay after prolonged use, leading to a preload below the effective force limit and reduced bone remodeling efficiency.

Description

Technical Field

[0001] This invention relates to the field of jaw orthodontics, specifically to a maxillary traction device for orthodontic use. Background Technology

[0002] For adolescents with insufficient transverse development of the maxilla or narrow dental arch, the most common orthodontic treatment method is maxillary palatal expansion. Palatal expansion technology transmits orthodontic force to various bone structures of the maxillofacial region through the load of the maxillary teeth, inducing bone remodeling. Clinically, external traction appliances are often used for partial tooth misalignment. The traction appliance is connected to the orthodontic device in the mouth through traction elastic bands, and pulls the maxilla forward, utilizing the bone growth potential of children and adolescents to achieve maxillary bone correction.

[0003] After wearing maxillary traction elastic bands for a period of time, the elasticity of the elastic bands tends to decrease rapidly, and the initial pretension decreases accordingly. If the actual tension is lower than the lower limit of the effective force value, the maxilla will not receive sufficient traction stimulation and will not reach the mechanical threshold required for bone remodeling. The efficiency of bone metabolism and remodeling will be reduced, which will not only prolong the orthodontic treatment course but also weaken the adjustment range of the jawbone, ultimately resulting in the occlusion and facial profile improvement effects not meeting expectations. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an orthodontic maxillary traction device, including a horizontal bar, a plurality of adjusting blocks slidably connected to the outer wall of the horizontal bar, a support rod slidably connected to the outer wall of the plurality of adjusting blocks, and a vertical rod slidably connected to the outer wall of each of the plurality of adjusting blocks, and further comprising: The sliding mechanism is slidably disposed on the outer wall of the crossbar. The sliding mechanism includes several sliding blocks 1 slidably connected to the outer wall of the crossbar. Each of the several sliding blocks 1 has a sliding block 2 slidably connected to its outer wall. The outer wall of the sliding block 2 has several fixing grooves. An adjusting mechanism is installed on the outer wall of the sliding mechanism. The fixing mechanism is fixedly installed on the outer wall of the crossbar.

[0005] The device includes two adjusting blocks arranged in a mirror image. The outer wall of one sliding block has five fixing slots, with the depth of the slots decreasing from top to bottom. Two vertical rods are connected to the same forehead pad and secured to the patient's head via a headband. A chin support is attached to the outer wall of the support rod, which can pull the patient's chin. After the medical staff installs the rapid arch expander onto the patient's maxillary jaw, they secure the vertical rods to the patient's head using the headband. They then adjust the positions of the adjusting blocks, horizontal rods, and support rods to ensure the entire device fits the set position. The traction elastic band is then attached to the rapid arch expander and stretched to the sliding mechanism position, maintaining a certain pre-tension to achieve maxillary correction.

[0006] Preferably, the sliding mechanism further includes: A fixing component is installed on the outer wall of the sliding block 1. The hook assembly is installed on the outer wall of the sliding block 2. When the traction rubber band is fixed to the sliding block 2, it will cause the hook assembly to be compressed, while the fixing assembly can fix the sliding block 1 to remain stationary.

[0007] Preferably, the adjustment mechanism includes: The movable component is installed on the outer wall of the sliding block 1. An adjustment component is installed on the outer wall of the movable component. When the adjustment component is adjusted, it will drive the moving component to move, and cause the two sliding blocks to slide on the outer wall of the crossbar.

[0008] Preferably, the fixing mechanism includes: A limiting component is fixedly installed on the outer wall of the crossbar. The limiting component restricts the position of the adjusting component.

[0009] Preferably, the fixing component includes a plurality of fixing screws threaded to the outer wall of the sliding block; Among them, the fixing screw fixes the sliding block on the crossbar by pressing the crossbar; Two fixing screws are provided on a sliding block. By tightening or loosening the fixing screws, the sliding block can be fixed and its position adjusted.

[0010] Preferably, the hook assembly includes a spring that is fixedly connected to the outer wall of the sliding block two; The side of the spring furthest from the second sliding block is fixedly connected to the first sliding block; The spring is initially in a free state and has not accumulated elastic potential energy.

[0011] Preferably, the moving component includes a moving block disposed on the outer wall of the crossbar, and the outer wall of the moving block is rotatably connected to a plurality of connecting rods; The side of the connecting rod furthest from the moving block is rotatably connected to the sliding block. There are two linkages, which are arranged in a mirror image.

[0012] Preferably, the adjusting assembly includes an adjusting screw that is slidably connected to the inner wall of the moving block, an adjusting nut that is threaded onto the outer wall of the adjusting screw, and a limit block that is fixedly connected to the side of the adjusting screw away from the adjusting nut. The adjusting nut and the limiting block are located on both sides of the moving block; As the adjusting nut moves toward the limit block, it causes the moving block to move, which in turn causes the two sliding blocks to move away from each other.

[0013] Preferably, the limiting component includes a fixed block fixedly connected to the outer wall of the crossbar, and a limiting groove is formed on the side of the fixed block near the moving block; The limiting groove is adapted to the limiting block.

[0014] The present invention has the following beneficial effects: (1) This invention utilizes the elastic potential energy accumulated by the rubber band to generate a certain pressure on the second sliding block, causing the second sliding block to move towards the horizontal bar. At this time, the spring changes from a free state to a compressed state, and the spring accumulates elastic potential energy. When the elastic force of the rubber band decreases, the pressure of the rubber band on the second sliding block decreases, so the spring can release some elastic potential energy to replenish the elastic potential energy lost by the rubber band, thereby reducing the rate of decrease in the elastic force of the rubber band. At the same time, when the patient performs daily chewing behavior, the rubber band stretches and changes independently, which is transformed into a change in both the rubber band and the spring, thereby reducing the stretching length of the rubber band and reducing the situation where the elastic force fails due to excessive stretching of the rubber band. Through the application of the above components, the problem of rapid decrease in elastic force of the rubber band after long-term use, resulting in the pretension force being lower than the lower limit of the effective force value and the reduction of bone remodeling efficiency is effectively prevented.

[0015] (2) This invention utilizes the feature of the rubber bands of the above-mentioned device being fixed in the fixed groove. When medical staff adjust the sliding block one, they can shorten the distance between the limiting block and the adjusting nut by rotating the adjusting nut on the adjusting screw. Since the limiting block is inserted into the limiting groove and the fixed block is fixed to the outer wall of the crossbar, the adjusting nut rotates and drives the moving block to move closer to the fixed block. The angle between the two connecting rods connected to the outer wall of the moving block increases, thereby driving the two sliding blocks one to slide on the surface of the crossbar. The distance between the two sliding blocks one increases. When the predetermined position is reached, the fixing screw on the sliding block one is tightened so that the sliding block one is fixed to the surface of the crossbar and does not slide. Thus, the two sliding blocks one maintain relative mirror symmetry. Through the application of the above components, the difficulty of the two sliding blocks one being completely mirrored is effectively alleviated, which leads to uneven traction force of the rubber bands on both sides, resulting in deviation of the jawbone under force and deviation from the correction target.

[0016] (3) The present invention utilizes the feature of the limiting block of the above-mentioned device being inserted into the limiting groove. When the limiting block is inserted into the limiting groove, the limiting groove will restrict the limiting block. When the sliding block is subjected to the tension of the rubber band and rotates on the surface of the crossbar, the limiting groove restricts the limiting block and the adjusting screw, thereby restricting the rotation trend of the moving block and the sliding block. Through the application of the above components, the problem of the sliding block being subjected to the tension of the rubber band for a long time, the sliding block rotating slightly on the surface of the crossbar, resulting in the shortening of the rubber band installation length and insufficient pretension is effectively prevented.

[0017] (4) This invention utilizes the feature of the above-mentioned device to pull the rubber band into the fixing slot. When the maxillary orthodontics reaches a certain level, the entire device needs to be adjusted. Therefore, a single adjustment requires a lot of time. By hanging the rubber band into the fixing slot at different depths and rotating the adjusting nut, the length of the rubber band can be quickly adjusted, and the pretension of the rubber band can be adjusted to achieve rapid adjustment. Through the application of the above components, the time for medical staff to adjust the pretension of the rubber band is effectively reduced, and the ease of operation is improved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram of A in the middle; Figure 4 This is a schematic cross-sectional view of the sliding mechanism of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram of B in the diagram; Figure 6 This is a schematic diagram of the adjustment mechanism of the present invention; Figure 7 This is a schematic diagram of the hook assembly of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram of C.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Sliding mechanism; 11. Fixing component; 12. Hook assembly; 13. Adjusting block; 14. Horizontal bar; 15. Support rod; 16. Vertical bar; 111. Sliding block one; 112. Fixing screw; 121. Sliding block two; 122. Fixing groove; 123. Spring; 2. Adjusting mechanism; 21. Moving component; 22. Adjusting component; 211. Moving block; 212. Connecting rod; 221. Adjusting screw; 222. Adjusting nut; 223. Limiting block; 3. Fixing mechanism; 31. Limiting; 311. Fixing block; 312. Limiting groove. Detailed Implementation

[0021] 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, and 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.

[0022] Example 1, please refer to Figures 1-4 This invention relates to an orthodontic maxillary traction device, comprising a horizontal bar 14, with a plurality of adjusting blocks 13 slidably connected to the outer wall of the horizontal bar 14, support rods 15 slidably connected to the outer walls of the plurality of adjusting blocks 13, and vertical rods 16 slidably connected to the outer walls of each of the plurality of adjusting blocks 13, and further comprising: The sliding mechanism 1 is slidably disposed on the outer wall of the crossbar 14. The sliding mechanism 1 includes several sliding blocks 111 slidably connected to the outer wall of the crossbar 14. Each of the several sliding blocks 111 has a sliding block 121 slidably connected to its outer wall. The outer wall of the sliding block 121 has several fixing grooves 122. Adjustment mechanism 2 is installed on the outer wall of sliding mechanism 1; Fixing mechanism 3 is fixedly installed on the outer wall of crossbar 14.

[0023] The device includes two adjusting blocks 13 arranged in a mirror image. The outer wall of a sliding block 121 has five fixing slots 122, with the depth of the slots decreasing from top to bottom. Two vertical rods 16 are connected to the same forehead pad and fixed to the patient's head via a headband. A chin support is connected to the outer wall of a support rod 15, which can pull the patient's chin. After the medical staff installs the rapid arch expander onto the patient's maxillary jaw, they fix the vertical rods 16 to the patient's head via the headband. Then, they adjust the positions of the adjusting blocks 13, the horizontal rod 14, and the support rod 15 to ensure the entire device fits the set position. A traction elastic band is then attached to the rapid arch expander and stretched to the sliding mechanism 1 position, maintaining a certain pre-tension to achieve orthodontic treatment of the patient's maxilla.

[0024] The sliding mechanism 1 also includes: Fixing component 11 is installed on the outer wall of sliding block 111; Hook assembly 12 is installed on the outer wall of sliding block 121; When the traction rubber band is fixed on the sliding block 121, it will cause the hook assembly 12 to be compressed, while the fixing assembly 11 can fix the sliding block 111 to remain stationary.

[0025] Adjustment mechanism 2 includes: Movable component 21 is installed on the outer wall of sliding block 111; Adjustment component 22 is installed on the outer wall of movable component 21; When the adjustment component 22 is adjusted, it will drive the moving component 21 to move, and drive the two sliding blocks 111 to slide on the outer wall of the crossbar 14.

[0026] Fixed mechanism 3 includes: Limiting component 31 is fixedly installed on the outer wall of crossbar 14; The limiting component 31 restricts the position of the adjusting component 22.

[0027] Example 2, please refer to Figures 2-8 The present invention is an orthodontic maxillary traction device. Based on Example 1, the fixing component 11 includes a plurality of fixing screws 112 threadedly connected to the outer wall of the sliding block 111. Among them, the fixing screw 112 fixes the sliding block 111 on the crossbar 14 by pressing the crossbar 14; Two fixing screws 112 are provided on a sliding block 111. By tightening or loosening the fixing screws 112, the sliding block 111 can be fixed and its position adjusted.

[0028] Hook assembly 12 includes a spring 123 fixedly connected to the outer wall of sliding block 2 121; Among them, the side of spring 123 away from sliding block 121 is fixedly connected to sliding block 111; Spring 123 is initially in a free state and has not accumulated elastic potential energy. After the patient has had the rapid expander installed, first hang two traction elastic bands on the expander, then stretch the elastic bands to deform them, causing them to move towards sliding block 111. Pull the elastic bands away from the expander to the position of sliding block 2121, where they will then be engaged in the fixing groove 122. Depending on the pre-tension and the distance between sliding block 111 and the face, the elastic bands will be engaged in different fixing grooves 122. At this point, the elastic bands will accumulate elastic potential energy, thus exerting pressure on sliding block 2121, causing it to move towards the crossbar 14. As the direction moves, spring 123 changes from a free state to a compressed state, accumulating elastic potential energy. When the elasticity of the rubber band decreases, the pressure of the rubber band on the sliding block 121 decreases, allowing spring 123 to release some elastic potential energy to replenish the lost elastic potential energy of the rubber band. This reduces the rate at which the rubber band tension decreases. Simultaneously, when the patient performs daily chewing activities, the rubber band's individual stretching changes, transforming into a combined change of the rubber band and spring 123, thereby reducing the rubber band's stretching length and minimizing the possibility of excessive stretching leading to elasticity failure.

[0029] The moving component 21 includes a moving block 211 disposed on the outer wall of the crossbar 14, and a plurality of connecting rods 212 are rotatably connected to the outer wall of the moving block 211; Among them, the side of the connecting rod 212 away from the moving block 211 is rotatably connected to the sliding block 111; There are two links 212, and the two links 212 are arranged in a mirror image.

[0030] The adjustment assembly 22 includes an adjustment screw 221 that is slidably connected to the inner wall of the moving block 211, an adjustment nut 222 that is threadedly connected to the outer wall of the adjustment screw 221, and a limit block 223 that is fixedly connected to the side of the adjustment screw 221 away from the adjustment nut 222. The adjusting nut 222 and the limiting block 223 are located on both sides of the moving block 211; As the adjusting nut 222 moves toward the limiting block 223, it will cause the moving block 211 to move, thereby causing the two sliding blocks 111 to move away from each other.

[0031] The limiting component 31 includes a fixing block 311 fixedly connected to the outer wall of the crossbar 14, and a limiting groove 312 is formed on the side of the fixing block 311 near the moving block 211.

[0032] Among them, the limiting groove 312 is adapted to the limiting block 223; By rotating the adjusting nut 222 on the adjusting screw 221, the distance between the limiting block 223 and the adjusting nut 222 is shortened. Since the limiting block 223 is inserted into the limiting groove 312 and the fixing block 311 is fixed to the outer wall of the crossbar 14, when the adjusting nut 222 rotates, it drives the moving block 211 to move closer to the fixing block 311. The included angle between the two connecting rods 212 connected to the outer wall of the moving block 211 increases, thereby driving the two sliding blocks 111 to slide on the surface of the crossbar 14. The distance between the two sliding blocks 111 increases. When the predetermined position is reached, the fixing screw 112 on the sliding block 111 is tightened, so that the sliding block 111 is fixed to the surface of the crossbar 14 and does not slide, thereby keeping the two sliding blocks 111 relatively mirror symmetrical. When the limiting block 223 is engaged in the limiting groove 312, the limiting groove 312 will restrict the limiting block 223. When the sliding block 111 rotates on the surface of the crossbar 14 under the tension of the rubber band, the limiting groove 312 restricts the limiting block 223 and the adjusting screw 221, thereby restricting the rotation tendency of the moving block 211 and the sliding block 111.

[0033] One specific application of this embodiment is as follows: When in use, after the medical staff installs the rapid arch expander onto the patient's maxillary jaw, they fix the vertical bar 16 to the patient's head with a headband, and then adjust the positions of the adjusting block 13, the horizontal bar 14 and the support bar 15 so that the whole device fits the set position. The traction elastic band is then hung on the rapid arch expander and stretched to the position of the sliding mechanism 1. The traction elastic band maintains a certain pretension to achieve orthodontic treatment of the patient's maxilla.

[0034] After wearing maxillary traction elastic bands for a period of time, the elasticity of the elastic bands tends to decay rapidly, and the initial pretension decreases accordingly. If the actual tension is lower than the lower limit of the effective force value, the maxilla will not receive sufficient traction stimulation, failing to reach the mechanical threshold required for bone remodeling. This reduces the efficiency of bone metabolism and remodeling, which will both prolong the orthodontic treatment course and weaken the range of jawbone adjustment, ultimately resulting in the occlusion and facial profile improvement effects not meeting expectations. After the patient has installed the rapid expander, first hang the two traction elastic bands on the expander, then stretch the traction elastic bands to deform them, causing them to move towards sliding block 111. After pulling the side of the elastic band away from the expander to the position of sliding block 2121, the elastic band is inserted into the fixing slot 122. Depending on the different pretension and the distance between sliding block 111 and the face, it is inserted into different fixing slots 122. At this time, the elastic band will accumulate elastic potential energy. This exerts pressure on the sliding block 121, causing it to move towards the crossbar 14. At this time, the spring 123 changes from a free state to a compressed state, accumulating elastic potential energy. When the elasticity of the rubber band decreases, the pressure of the rubber band on the sliding block 121 decreases, allowing the spring 123 to release some elastic potential energy to replenish the lost elastic potential energy of the rubber band. This reduces the rate of elasticity decay of the rubber band. Simultaneously, when the patient performs daily chewing, the rubber band's individual stretching changes are transformed into a combined change of the rubber band and spring 123, thereby reducing the rubber band's stretching length and preventing excessive stretching that could lead to elasticity failure. Through the application of the above components, the problem of rapid elasticity decay of the rubber band after prolonged use, resulting in pretension below the effective force limit and reduced bone remodeling efficiency, is effectively prevented.

[0035] Taking advantage of the feature of the above-mentioned device where the elastic band is fixed in the fixing groove 122, when medical staff adjust the position of the sliding block 111, it is difficult to adjust the two sliding blocks 111 to be completely mirror images. This results in different initial tensile lengths of the elastic bands on both sides, and consequently, a large deviation in the initial pretension of the elastic bands on both sides, causing uneven traction forces on both sides. Consequently, the jawbone is misaligned and deviates from the orthodontic target. When adjusting the sliding block 111, medical staff can shorten the distance between the limiting block 223 and the adjusting nut 222 by rotating the adjusting screw 221. Since the limiting block 223 is inserted into the limiting groove 312 and the fixing block 311 is fixed to the outer wall of the crossbar 14, the adjusting nut 222 can be adjusted. When rotated, the moving block 211 moves closer to the fixed block 311. The angle between the two connecting rods 212 connected to the outer wall of the moving block 211 increases, thereby causing the two sliding blocks 111 to slide on the surface of the crossbar 14. The distance between the two sliding blocks 111 increases. When the predetermined position is reached, the fixing screws 112 on the sliding block 111 are tightened, so that the sliding block 111 is fixed on the surface of the crossbar 14 and does not slide. This keeps the two sliding blocks 111 relatively mirror symmetrical. Through the application of the above components, the problem of the two sliding blocks 111 being difficult to mirror perfectly is effectively alleviated, which leads to uneven traction force on both sides of the elastic band, resulting in jawbone force deviation and deviation from the orthodontic target.

[0036] Utilizing the feature that the limiting block 223 engages with the limiting groove 312, the sliding block 111 is fixed by the fixing screw 112. When the sliding block 111 bears the tension of the rubber band for a long time, the fixing screw 112 will slide on the surface of the crossbar 14, resulting in the shortening of the rubber band's deformation length and insufficient preload. When the limiting block 223 engages with the limiting groove 312, the limiting groove 312 will restrict the limiting block 223. When the sliding block 111 rotates on the surface of the crossbar 14 under the tension of the rubber band, the limiting groove 312 restricts the limiting block 223 and the adjusting screw 221, thereby limiting the rotation tendency of the moving block 211 and the sliding block 111. Through the application of the above components, the problem of the sliding block 111 being subjected to the tension of the rubber band for a long time, resulting in slight rotation of the sliding block 111 on the surface of the crossbar 14, leading to the shortening of the rubber band's installation length and insufficient preload is effectively prevented.

[0037] Utilizing the feature of the aforementioned device that allows the elastic band to be inserted into the fixing slot 122, when the maxillary orthodontics has reached a certain level, the entire device needs to be adjusted. This means that a single adjustment requires a significant amount of time. By inserting the elastic band into the fixing slot 122 at different depths and rotating the adjusting nut 222, the elastic band's stretching length and pretension can be quickly adjusted, achieving rapid adjustment. Through the application of the aforementioned components, the time required for medical staff to adjust the elastic band's pretension is effectively reduced, improving operational convenience.

[0038] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A maxillary traction device for orthodontic use, comprising a horizontal bar (14), wherein a plurality of adjusting blocks (13) are slidably connected to the outer wall of the horizontal bar (14), a support rod (15) is slidably connected to the outer wall of the plurality of adjusting blocks (13), and a vertical rod (16) is slidably connected to the outer wall of each of the plurality of adjusting blocks (13), characterized in that, Also includes: The sliding mechanism (1) is slidably disposed on the outer wall of the crossbar (14). The sliding mechanism (1) includes several sliding blocks (111) slidably connected to the outer wall of the crossbar (14). The outer walls of the several sliding blocks (111) are all slidably connected to sliding blocks (121). The outer walls of the sliding blocks (121) are provided with several fixing grooves (122). Adjustment mechanism (2), which is installed on the outer wall of sliding mechanism (1); The fixing mechanism (3) is fixedly installed on the outer wall of the crossbar (14).

2. The maxillary traction device for orthodontic use according to claim 1, characterized in that: The sliding mechanism (1) further includes: A fixing component (11) is installed on the outer wall of the sliding block (111); Hook assembly (12), said hook assembly (12) is installed on the outer wall of sliding block two (121); When the traction rubber band is fixed on the sliding block two (121), it will cause the hook assembly (12) to be compressed, while the fixing assembly (11) can fix the sliding block one (111) to remain stationary.

3. The maxillary traction device for orthodontic use according to claim 2, characterized in that: The adjustment mechanism (2) includes: A movable component (21) is mounted on the outer wall of a sliding block (111); Adjustment component (22), which is installed on the outer wall of the movable component (21); When the adjustment component (22) is adjusted, it will drive the moving component (21) to move and drive the two sliding blocks (111) to slide on the outer wall of the crossbar (14).

4. The maxillary traction device for orthodontic use according to claim 3, characterized in that: The fixing mechanism (3) includes: Limiting component (31), the limiting component (31) is fixedly disposed on the outer wall of the crossbar (14); Among them, the limiting component (31) restricts the position of the adjusting component (22).

5. The maxillary traction device for orthodontic use according to claim 4, characterized in that: The fixing component (11) includes a plurality of fixing screws (112) threadedly connected to the outer wall of the sliding block (111). The fixing screw (112) fixes the sliding block (111) on the crossbar (14) by pressing the crossbar (14).

6. The maxillary traction device for orthodontic use according to claim 5, characterized in that: The hook assembly (12) includes a spring (123) fixedly connected to the outer wall of the sliding block (121); Among them, the side of the spring (123) away from the second sliding block (121) is fixedly connected to the first sliding block (111).

7. The maxillary traction device for orthodontics according to claim 6, characterized in that: The moving component (21) includes a moving block (211) disposed on the outer wall of the crossbar (14), and the outer wall of the moving block (211) is rotatably connected to a plurality of connecting rods (212). Among them, the side of the connecting rod (212) away from the moving block (211) is rotatably connected to the sliding block (111).

8. The maxillary traction device for orthodontic use according to claim 7, characterized in that: The adjustment assembly (22) includes an adjustment screw (221) slidably connected to the inner wall of the moving block (211), an adjustment nut (222) threadedly connected to the outer wall of the adjustment screw (221), and a limit block (223) fixedly connected to the side of the adjustment screw (221) away from the adjustment nut (222). The adjusting nut (222) and the limiting block (223) are located on both sides of the moving block (211).

9. The maxillary traction device for orthodontics according to claim 8, characterized in that: The limiting component (31) includes a fixing block (311) fixedly connected to the outer wall of the crossbar (14), and the fixing block (311) has a limiting groove (312) on the side near the moving block (211). The limiting groove (312) is adapted to the limiting block (223).

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