Orthodontic traction equipment for children

Abstract

The invention relates to the technical field of orthodontics, and particularly discloses a child oral cavity orthodontic traction device which comprises a lower fixing unit; an upper fixing unit; an adjusting unit; and a traction rib placement unit. The device is integrally worn and fixed on the head of a child through the lower fixing unit and the upper fixing unit, the transverse and angular positions of the traction rib placing unit are roughly adjusted through the adjusting unit, and finally one end of the traction rib is stretched and precisely arranged on a hook of an oral cavity tooth socket in a sleeving mode through linear pushing of a push-pull rod and specific actions of a placing piece. The placement operation of the traction rib is changed from intraoral blind operation completely depending on hand feeling to visual semi-automatic in-vitro operation capable of assisting positioning, so that the operation difficulty is greatly reduced, and the placement precision and the success rate are effectively improved; through sectional adjustment, the operation process is standardized, excessive dependence on personal experience is reduced, single operation time is effectively shortened, and meanwhile discomfort and fear caused by long-time mouth opening and repeated trial and error of children are relieved.

Description

Technical Field

[0001] This invention relates to the field of orthodontic technology, and more specifically, to a pediatric orthodontic traction device. Background Technology

[0002] In the field of pediatric orthodontics, traction tendons are important components that connect intraoral appliances with extraoral or intermaxillary devices, and their precise placement is key to achieving effective corrective force. However, in current clinical practice, the placement of traction tendons relies entirely on doctors or parents holding instruments and performing almost blind manual operations inside the patient's mouth. First, the operating space is small and the field of vision is severely limited. It is extremely difficult to hang the small elastic tendons on the hooks of specific orthodontic appliances by feel alone. It is highly dependent on the operator's experience. Due to the lack of effective external positioning and assistive pushing tools, each operation is time-consuming and inefficient. Moreover, it is difficult to accurately control the placement position and traction angle, which affects the orthodontic effect. Second, children have poor cooperation. Prolonged mouth opening can easily lead to fatigue and nausea. They have low tolerance for repeated trial and error and are prone to fear and resistance, further increasing the difficulty of the operation. Summary of the Invention

[0003] To overcome the above-mentioned technical problems, the present invention proposes a pediatric orthodontic traction device.

[0004] The objective of this invention can be achieved through the following technical solutions: A pediatric orthodontic traction device, comprising: Lower fixed unit; The upper fixing unit is detachably connected to the lower fixing unit; An adjustment unit is located at the front end of the lower fixed unit and includes an arc-shaped adjustment frame fixed to the lower fixed unit and an adjustment component movably disposed within the arc-shaped adjustment frame. Several hooks are equidistantly arranged below the arc-shaped adjustment frame. The traction bar placement unit includes a push-pull rod with a movable through-adjustment component, and a placement component is detachably installed at one end of the push-pull rod.

[0005] As a further aspect of the present invention: an arc-shaped groove is provided inside the arc-shaped adjustment frame, the adjustment component is slidably embedded in the arc-shaped groove, and the push-pull rod slidably passes through the adjustment component.

[0006] As a further aspect of the present invention: the adjusting component includes a ball sleeve movably embedded in an arc-shaped groove, with guide plates symmetrically arranged at both ends of the ball sleeve to abut against the opening of the arc-shaped groove, an adjusting ball movably embedded in the ball sleeve, and the push-pull rod sliding through the adjusting ball.

[0007] As a further aspect of the present invention: the placement component includes a mounting plate detachably connected to the push-pull rod, a flexible pressure plate is provided on the side of the mounting plate away from the push-pull rod, and a guide rod is provided on the flexible pressure plate that slides through the mounting plate; a lifting groove is vertically provided on the mounting plate, a lifting block is slidably installed in the lifting groove, a connecting rod is hinged between the lifting block and the flexible pressure plate, and rib support rods are symmetrically and vertically fixed on both sides of the lower end face of the lifting block.

[0008] As a further aspect of the present invention: a return spring is movably sleeved on the guide rod, the return spring is located between the mounting plate and the flexible pressure plate, and a limit plate is provided at the end of the guide rod away from the flexible pressure plate.

[0009] As a further aspect of the present invention: a clearance groove for accommodating the traction bar is provided at the center of the bottom of the mounting plate, and a sleeve for engaging with the push-pull rod is provided on the side of the mounting plate facing the push-pull rod.

[0010] As a further aspect of the present invention: the lower fixing unit includes a lower bracket and a lower elastic strap disposed on the lower bracket.

[0011] As a further aspect of the present invention: the upper fixing unit includes an upper bracket and an upper elastic strap disposed on the upper bracket.

[0012] As a further embodiment of the present invention: pressure rods are symmetrically arranged on both sides of the top of the lower support, and locking pins adapted to the pressure rods are symmetrically arranged on both sides of the upper support.

[0013] As a further embodiment of the present invention: a top rod is movably and through the top of the front side of the lower support, a top plate is provided at one end of the top rod facing the upper support, and a top pressure spring is movably sleeved on the top rod and abuts against the top plate.

[0014] The beneficial effects of this invention are: The device is secured to the child's head using lower and upper fixation units. An adjustment unit coarsely adjusts the lateral and angular position of the traction tendon placement unit. Finally, through the linear push of the push-pull rod and the specific movement of the placement component, one end of the traction tendon is stretched and precisely fitted onto the hook of the brace inside the mouth. This transforms the placement of the traction tendon from a completely tactile, blind intraoral operation to a visual, assisted-positioning, semi-automated external operation, greatly reducing the difficulty of the operation and effectively improving placement accuracy and success rate. Segmented adjustment standardizes the operation process, reducing over-reliance on personal experience and effectively shortening the time per operation, while also alleviating discomfort and fear in children caused by prolonged mouth opening and repeated trial and error. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of the adjustment unit and the traction tendon placement unit in this invention; Figure 4 This is a schematic diagram of the adjustment unit and traction tendon placement unit from another perspective in this invention; Figure 5 This is a cross-sectional view of the adjustment unit in this invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the traction tendon placement unit in this invention; Figure 8 This is a schematic diagram of the traction tendon placement unit from another perspective in this invention; Figure 9 This is a schematic diagram of the connection structure between the lower fixing unit and the upper fixing unit in this invention.

[0017] In the picture: 100. Lower fixing unit; 110. Lower bracket; 120. Lower elastic strap; 130. Pressure rod; 140. Top rod; 150. Top plate; 160. Top compression spring; 200. Upper fixing unit; 210. Upper bracket; 220. Upper elastic strap; 230. Locking pin; 300. Adjustment unit; 310. Arc-shaped adjustment frame; 320. Arc-shaped slide groove; 330. Adjustment component; 331. Ball sleeve; 332. Guide plate; 333. Adjustment ball; 340. Hook; 400. Traction bar placement unit; 410. Push-pull rod; 420. Placement component; 421. Mounting plate; 4211. Clearance groove; 4212. Sleeve; 422. Flexible pressure plate; 423. Guide rod; 424. Return spring; 425. Limiting plate; 426. Lifting slide; 427. Lifting block; 428. Connecting rod; 429. Strap support rod; 500. Traction bar. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] Please see Figure 1 and Figure 2 The present invention discloses a pediatric orthodontic traction device, comprising a lower fixing unit 100, an upper fixing unit 200, an adjustment unit 300 and a traction ligament placement unit 400, wherein the upper fixing unit 200 and the lower fixing unit 100 are detachably connected. Please see Figure 3 and Figure 4 The adjustment unit 300 is disposed at the front end of the lower fixed unit 100, and includes an arc-shaped adjustment frame 310 fixed on the lower fixed unit 100 and an adjustment component 330 movably disposed within the arc-shaped adjustment frame 310. Several hooks 340 are equidistantly arranged below the arc-shaped adjustment frame 310. The traction rib placement unit 400 includes a push-pull rod 410 that movably passes through the adjustment component 330, and a placement component 420 is detachably installed at one end of the push-pull rod 410. Specifically, first, the lower fixation unit 100 and the upper fixation unit 200 are put on and fixed to the patient's head, so that the traction tendon placement unit 400 is facing the child's mouth; then, one end of the traction tendon 500 is hung on the corresponding hook 340, and the other end of the traction tendon 500 is connected to the placement piece 420. The position of the traction tendon placement unit 400 is adjusted by sliding the adjustment piece 330 along the arc-shaped adjustment frame 310, and the placement piece 420 carrying the other end of the traction tendon 500 is moved to the area in front of the braces to be tractiond in the child's mouth. The adjusting component 330 pushes the push-pull rod 410 into the child's mouth, causing the placement component 420 to extend into the child's mouth. At the same time, it stretches the traction ligament 500 until the placement component 420 pushes the other end of the traction ligament 500 onto the corresponding brace hook to be tractioned and releases the traction ligament 500. Then, the push-pull rod 410 pulls the placement component 420 out of the child's mouth, thus completing the placement of the traction ligament 500. By repeating this process, traction ligaments 500 can be placed in different positions in the child's mouth to traction the braces.

[0020] It should be noted that the device is worn and fixed on the child's head by the lower fixing unit 100 and the upper fixing unit 200. The adjustment unit 300 is used to roughly adjust the lateral and angular position of the traction tendon placement unit 400. Finally, through the linear push of the push-pull rod 410 and the specific action of the placement piece 420, one end of the traction tendon 500 is stretched and precisely fitted onto the hook of the braces in the mouth. The placement of traction tendons has been transformed from a completely manual, blind intraoral procedure to a visual, semi-automated external procedure with assisted positioning. This greatly reduces the difficulty of the operation and effectively improves the placement accuracy and success rate. Through segmented adjustment, the operation process is standardized, reducing over-reliance on personal experience and effectively shortening the time of a single operation. At the same time, it reduces the discomfort and fear caused by children's prolonged mouth opening and repeated trial and error.

[0021] In one embodiment, please refer to Figure 5 The arc-shaped adjustment frame 310 has an arc-shaped sliding groove 320 inside, the adjustment component 330 is slidably embedded in the arc-shaped sliding groove 320, and the push-pull rod 410 slides through the adjustment component 330. Specifically, by adjusting the 330 circumferentially sliding within the arc-shaped slide groove 320, the positions of the push-pull rod 410 and the placement piece 420 can be adjusted, thereby facilitating the movement of the placement piece 420 to different parts of the brace for the placement of the traction rib 500; the adjustment 330 sliding within the arc-shaped slide groove 320 causes the push-pull rod 410 passing through it and the placement piece 420 at its end to move along a predetermined arc-shaped trajectory.

[0022] It should be noted that the design of the arc-shaped slide 320 makes the movement trajectory of the traction rib placement unit 400 match the curvature of the dental arch, achieving a match between the coarse positioning range and the oral physiological structure. This lays a precise and reliable path foundation for subsequent fine operations and avoids shaking and uncertainty during the adjustment process.

[0023] Further, please refer to Figure 5 and Figure 6 The adjusting component 330 includes a ball sleeve 331 movably embedded in the arc-shaped slide groove 320. The ball sleeve 331 has guide plates 332 symmetrically arranged at both ends that abut against the opening of the arc-shaped slide groove 320. An adjusting ball 333 is movably embedded in the ball sleeve 331. The push-pull rod 410 slides through the adjusting ball 333. Specifically, the ball sleeve 331 can slide circumferentially along the arc-shaped groove 320 under the guidance of the guide plates 332 on both sides, while the adjusting ball 333 can rotate at any angle within the ball sleeve 331. This allows for the horizontal adjustment of the push-pull rod 410, and also enables the push-pull rod 410 and the placement piece 420 to tilt at any angle, making it suitable for placing and tractioning the traction rib 500 at different positions of the dental brace. The adjusting component 330 adopts a ball joint combination of ball sleeve 331 and adjusting ball 333. The ball sleeve 331 can slide along the arc-shaped slide groove 320 to achieve circumferential adjustment, while the adjusting ball 333 can rotate at multiple angles within the ball sleeve 331, thereby changing the axial tilt angle of the push-pull rod 410.

[0024] It is worth noting that, based on the arc-shaped one-dimensional adjustment, a universal joint-type angular freedom has been introduced. This not only allows the placement component 420 to move laterally, but also allows its pitch or tilt angle to be adjusted arbitrarily as needed, so as to accurately align with the braces hooks at different heights and orientations in the oral cavity. This greatly expands the applicability and flexibility of the device, ensuring that the placement component 420 can approach the target position in the optimal posture, and cope with the complex and ever-changing oral cavity environment.

[0025] In yet another embodiment, please refer to Figure 7and Figure 8 The placement component 420 includes a mounting plate 421 detachably connected to the push-pull rod 410. A flexible pressure plate 422 is provided on the side of the mounting plate 421 away from the push-pull rod 410. A guide rod 423 that slides through the mounting plate 421 is provided on the flexible pressure plate 422. A lifting groove 426 is vertically opened on the mounting plate 421. A lifting block 427 is slidably installed in the lifting groove 426. A connecting rod 428 is hinged between the lifting block 427 and the flexible pressure plate 422. Rib support rods 429 are symmetrically and vertically fixed on both sides of the lower end face of the lifting block 427. Specifically, the other end of the traction bar 500 is fitted onto the two side support rods 429. The push-pull rod 410 is pushed towards the child's mouth by the relative adjustment component 330. The placement component 420 can then stretch the other end of the traction bar 500 into the child's mouth until the flexible pressure plate 422 contacts the dental brace in the mouth. Then, the push-pull rod 410 pushes the mounting plate 421 to continue feeding. The guide rod 423 on the flexible pressure plate 422 slides horizontally relative to the mounting plate 421. Under the linkage of the connecting rod 428, the lifting block 427 is driven to slide downward along the lifting slide groove 426. The traction bar 500, which is stretched open by the support rods 429, is then fitted onto the hook at the corresponding position of the dental brace. Then, the push-pull rod 410 pulls the placement component 420 out of the child's mouth until the placement component 420 is separated from the traction bar 500. This achieves the connection and traction between the traction bar 500 and the dental brace in the patient's mouth. The core of the placement component 420 is the linkage mechanism of the linkage 428. When the push-pull rod 410 is pushed to prevent the flexible pressure plate 422 from contacting the dental aligner, the continued push will cause the flexible pressure plate 422 to move backward relative to the mounting plate 421. Then, through the guide rod 423 and the linkage 428, the lifting block 427 with the sleeve support rod 429 is forced to descend, thereby pressing the spread traction rib 500 down onto the dental aligner hook.

[0026] It should be noted that by using the pressure and triggering mechanism, the linear thrust is converted into the downward movement of the lifting block 427, which simulates and replaces the delicate movement of using fingers to hook the traction tendon, but is more stable, powerful and precise. The design of the flexible pressure plate 422 not only protects the soft tissue of the oral cavity, but also provides reliable triggering feedback, ensuring that the hooking action only occurs after the contact is in place, avoiding misoperation.

[0027] Further, please refer to Figure 7 and Figure 8 A return spring 424 is movably sleeved on the guide rod 423. The return spring 424 is located between the mounting plate 421 and the flexible pressure plate 422. A limit plate 425 is provided at the end of the guide rod 423 away from the flexible pressure plate 422. Specifically, after the traction bar 500 is placed, the return spring 424 can push the flexible pressure plate 422 away from the mounting plate 421 when the placement piece 420 is completely removed from the child's mouth. As a result, under the action of the connecting rod 428, the lifting block 427 and the sleeve support rod 429 move upward and reset on their own, so that the sleeve support rod 429 can be easily pulled out from the traction bar 500, and the placement piece 420 can be easily separated from the traction bar 500. A reset spring 424 is installed on the guide rod 423. When the placement part 420 is pulled back after the sleeve is hung, the flexible pressure plate 422 is pushed away from the mounting plate 421 under the elastic force of the reset spring 424, thereby driving the lifting block 427 and the sleeve support rod 429 to automatically rise and reset through the linkage 428.

[0028] It should be noted that the automatic reset and unhooking of the actuator ensures that the sling rod 429 can retract immediately after completing the downward slinging action, thus easily detaching from the already hung traction bar 500 rings. This avoids the risk of placement failure caused by hooking or pulling the traction bar during the extraction process, simplifies the operation steps, and improves the continuity and reliability of the operation.

[0029] Furthermore, please refer to Figure 7 and Figure 8 The mounting plate 421 has a relief groove 4211 at the center of its bottom for accommodating the traction bar 500, and the mounting plate 421 has a sleeve 4212 on the side facing the push-pull rod 410 for engaging with the push-pull rod 410. Specifically, the clearance groove 4211 can prevent interference between the mounting plate 421 and the traction rib 500, and the clamp 4212 can realize the quick assembly and disassembly of the entire placement component 420 and the push-pull rod 410. After the traction rib 500 is placed, the placement component 420 is pulled out from one end of the push-pull rod 410, and then the push-pull rod 410 is pulled out from the adjusting component 330 to realize the disassembly of the entire traction rib placement unit 400. The mounting plate 421 has a clearance groove 4211 at the bottom to make room for the traction rib 500; the fastening connection between the placement part 420 and the push-pull rod 410 is achieved by the sleeve 4212.

[0030] It is worth noting that the clearance groove 4211 eliminates motion interference between components, ensuring that the traction rib 500 moves smoothly and without obstruction during the pushing process; the quick-release design of the sleeve 4212 facilitates the disassembly and replacement of the placement part 420, and also improves the convenience of equipment use and maintenance efficiency.

[0031] In further embodiments, please refer to Figure 9The lower fixing unit 100 includes a lower bracket 110 and a lower elastic strap 120 disposed on the lower bracket 110; the upper fixing unit 200 includes an upper bracket 210 and an upper elastic strap 220 disposed on the upper bracket 210. Specifically, after connecting the lower elastic strap 120 to the lower support 110, the lower elastic strap 120 is first passed down from the top of the child's head and looped around the back of the child's neck. Then, the upper elastic strap 220 is passed down from the top of the child's head and looped around the back of the child's ear. The lower support 110 and the lower elastic strap 120 can be fixed in front of the child's face using the lower elastic strap 120 and the upper elastic strap 220. The device is stably fixed in front of the child by using the separate lower support 110 (with lower elastic strap 120) and upper support 210 (with upper elastic strap 220) by looping them around the neck and behind the ears, respectively.

[0032] It should be noted that the elastic bandage adapts to different children's head shapes, provides reliable fixation and reduces pressure. It shifts the support point of the device from the face to the head and neck, freeing the child from the burden of holding the child's head in place with one hand during traction, allowing the operator to focus more on the fine motor skills of both hands. It also reduces the resistance caused by the child's head being fixed by external force.

[0033] Further, please refer to Figure 9 The lower support 110 has pressure rods 130 symmetrically arranged on both sides of its top, and the upper support 210 has locking pins 230 symmetrically arranged on both sides that are adapted to the pressure rods 130. Specifically, the locking pins 230 on both sides of the upper bracket 210 are respectively locked under the corresponding pressure rods 130, so that the upper bracket 210 can be rotated back and forth relative to the lower bracket 110 around the locking pins 230. After the lower elastic band 120 on the lower bracket 110 is put on, the upper bracket 210 is rotated backward relative to the lower bracket 110 around the locking pins 230. Finally, the upper elastic band 220 is put on the child's head. The pressure rod 130 can prevent the locking pins 230 on the upper bracket 210 from accidentally coming off, thereby achieving the fixation of the entire lower fixation unit 100 and the upper fixation unit 200 to the patient's head.

[0034] It is worth noting that the device achieves step-by-step wearing and stable locking. The flip-up design makes the wearing process more flexible and easy to adjust and confirm the position. The combination of the locking pin 230 and the pressure rod 130 forms a safety mechanism to prevent accidental detachment. While ensuring the mobility of the connection, it also ensures the overall structural stability during use, prevents the device from becoming loose due to children's activities, and ensures operational safety.

[0035] Furthermore, please refer to Figure 9A top rod 140 is movably and through the top of the front side of the lower support 110. A top plate 150 is provided at one end of the top rod 140 facing the upper support 210. A top pressure spring 160 is movably sleeved on the top rod 140 and abuts against the top plate 150. Specifically, after the upper bracket 210 is fixed, the top plate 150 at the end of the top rod 140 is pushed by the top pressure spring 160 to further press against the upper bracket 210, thereby further preventing the upper bracket 210 from separating from the lower bracket 110; the top plate 150 is always pressed against the upper bracket 210 by the top pressure spring 160 continuously applying elastic force to the top rod 140, thereby increasing its overturning resistance.

[0036] It is worth noting that, based on the mechanical buckle, a continuous elastic clamping force is added as a secondary safety measure, which further enhances the stability of the connection between the lower fixing unit 100 and the upper fixing unit 200. This effectively prevents the possibility of the upper bracket 210 accidentally popping open or loosening due to slight external force or vibration during operation, and enables the equipment to maintain extremely high overall rigidity in dynamic operating environments.

[0037] The specific embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A pediatric orthodontic traction device, characterized in that, include: Lower fixed unit (100); The upper fixing unit (200) is detachably connected to the lower fixing unit (100); An adjustment unit (300) is disposed at the front end of the lower fixed unit (100), including an arc-shaped adjustment frame (310) fixed on the lower fixed unit (100) and an adjustment component (330) movably disposed within the arc-shaped adjustment frame (310). Several hooks (340) are equidistantly disposed below the arc-shaped adjustment frame (310). The traction bar placement unit (400) includes a push-pull rod (410) with a movable through-adjustment member (330), one end of which is detachably fitted with a placement member (420).

2. The pediatric orthodontic traction device according to claim 1, characterized in that, The arc-shaped adjustment frame (310) has an arc-shaped groove (320) inside, the adjustment component (330) is slidably embedded in the arc-shaped groove (320), and the push-pull rod (410) slides through the adjustment component (330).

3. The pediatric orthodontic traction device according to claim 2, characterized in that, The adjusting component (330) includes a ball sleeve (331) movably embedded in an arc-shaped groove (320). The ball sleeve (331) has guide plates (332) symmetrically arranged at both ends that abut against the opening of the arc-shaped groove (320). An adjusting ball (333) is movably embedded in the ball sleeve (331). The push-pull rod (410) slides through the adjusting ball (333).

4. The pediatric orthodontic traction device according to claim 1, characterized in that, The placement component (420) includes a mounting plate (421) detachably connected to the push-pull rod (410). A flexible pressure plate (422) is provided on the side of the mounting plate (421) away from the push-pull rod (410). A guide rod (423) that slides through the mounting plate (421) is provided on the flexible pressure plate (422). A lifting groove (426) is vertically opened on the mounting plate (421). A lifting block (427) is slidably installed in the lifting groove (426). A connecting rod (428) is hinged between the lifting block (427) and the flexible pressure plate (422). Rib support rods (429) are symmetrically and vertically fixed on both sides of the lower end face of the lifting block (427).

5. A pediatric orthodontic traction device according to claim 4, characterized in that, A reset spring (424) is movably sleeved on the guide rod (423). The reset spring (424) is located between the mounting plate (421) and the flexible pressure plate (422). A limit plate (425) is provided at the end of the guide rod (423) away from the flexible pressure plate (422).

6. A pediatric orthodontic traction device according to claim 4, characterized in that, The mounting plate (421) has a relief groove (4211) at the center of the bottom for accommodating the traction bar (500), and the mounting plate (421) has a sleeve (4212) on the side facing the push rod (410) that engages with the push rod (410).

7. A pediatric orthodontic traction device according to claim 1, characterized in that, The lower fixing unit (100) includes a lower bracket (110) and a lower elastic strap (120) disposed on the lower bracket (110).

8. A pediatric orthodontic traction device according to claim 7, characterized in that, The upper fixing unit (200) includes an upper bracket (210) and an upper elastic strap (220) disposed on the upper bracket (210).

9. A pediatric orthodontic traction device according to claim 8, characterized in that, The lower support (110) has pressure rods (130) symmetrically arranged on both sides of the top, and the upper support (210) has locking pins (230) symmetrically arranged on both sides that are adapted to the pressure rods (130).

10. A pediatric orthodontic traction device according to claim 9, characterized in that, A top rod (140) is movably connected to the top front side of the lower support (110). A top plate (150) is provided at one end of the top rod (140) facing the upper support (210). A top pressure spring (160) is movably sleeved on the top rod (140) and abuts against the top plate (150).

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