Maxilla retractor

Abstract

The invention belongs to the technical field of orthodontic instruments, and particularly relates to a maxilla retractor which comprises a limiting part, a fixing part and a fixing part. One side of the lower jaw bracket is fixedly connected with a buffer part; a mounting frame is fixedly connected to the side wall of the lower jaw bracket; the positioning part comprises supporting arms symmetrically arranged on the two sides of the limiting part; at least two joints are arranged in the supporting arm; limiting pieces are arranged on the joints; one end of the supporting arm is connected with the limiting part, and the other end of the supporting arm is connected with the lower jaw bracket; traction rods are hinged to the two ends of the traction support; a movable joint is arranged on the traction rod; one end of the movable joint is slidably connected with the supporting arm, and the other end is slidably connected with the traction rod; a positioning piece is arranged on the movable joint; one end of the auxiliary part is detachably connected with the mounting frame, and the other end is detachably connected with the traction bracket.

Description

Technical Field

[0001] The invention belongs to the technical field of oral orthodontic instruments, and particularly relates to a maxillary distractor. Background Art

[0002] For adolescents with insufficient transverse maxillary development or narrow dental arches, the most commonly used orthodontic treatment is maxillary palatal expansion. Palatal expansion utilizes the load of the maxillary teeth to transmit orthodontic forces to the various bony structures of the maxillofacial area, causing bone remodeling. The effectiveness of palatal expansion is closely related to factors such as the force applied, duration of expansion, and patient age. Currently, orthodontic palatal expansion can be categorized as rapid palatal expansion (RPE) and slow palatal expansion (SPE).

[0003] Rapid Retraction and Extension (RPE) involves daily application of force, rapidly accumulating several kilograms of corrective force. This widens the palatal suture while minimizing tooth tilt, maximizing the bone gain relative to tooth tilt. This produces greater skeletal changes, elevating the palatal roof and enhancing the eruption of anchoring teeth. However, the significant corrective force generated by maxillary RPE does have some impact on the teeth, raising the question of the necessity of such a large corrective force.

[0004] Slow palatal expansion (SPE) involves applying force once a week. This provides a relatively constant force without cumulative surges, thus reducing tissue fluid accumulation and bleeding, and is more consistent with the physiological formation and response of bone. However, SPE produces more arch expansion and significant dental effects, such as molar tilting and rotation. RPE results in a gap in the palatal suture in almost all cases, while SPE only occurs in half of the cases. RPE also exhibits more variability in the sagittal and vertical directions, while SPE produces more mandibular retrorotation.

[0005] Angle's Class III malocclusion, commonly known as "underbite," is a common malocclusion in orthodontic practice with a high incidence. During growth and development, as the mandible continues to grow, the deformity gradually worsens, evolving from a dental and functional condition to a skeletal one, severely impacting jaw development, oral function, and facial aesthetics. Changing environmental factors during growth and development can affect the amount and direction of craniomaxillofacial growth.

[0006] Clinically, early-stage Field III dental, functional, and skeletal malocclusions are often treated with external distraction appliances, using devices such as chin cups and maxillary protraction devices. These devices are available in both day-use and night-use versions. Day-use devices are primarily placed on either side of the patient's cheeks to facilitate eating. Night-use devices are primarily placed in front of the patient to prevent them from interfering with sleep. However, patients often struggle to switch between the day-use and night-use versions, requiring them to choose one based on their needs. Summary of the Invention

[0007] In response to the above problems, the present application discloses a maxillary distractor.

[0008] A maxillary distractor, comprising:

[0009] The limiting portion forms a ring-shaped structure;

[0010] A buffer portion is fixedly connected to one side of the mandibular support; a mounting frame is fixedly connected to the side wall of the mandibular support;

[0011] The positioning portion includes support arms symmetrically arranged on both sides of the limiting portion; at least two joints are provided inside the support arms; each joint is provided with a limiting member; one end of the support arm is connected to the limiting portion, and the other end is connected to the lower jaw support;

[0012] The traction bracket has traction rods hinged at both ends; the traction rod is provided with a movable joint; one end of the movable joint is slidably connected to the support arm, and the other end is slidably connected to the traction rod; the movable joint is provided with a positioning piece;

[0013] The auxiliary part has one end detachably connected to the mounting frame and the other end detachably connected to the traction bracket.

[0014] Furthermore, the support arm includes a first support rod, a second support rod, a third support rod and a fourth support rod; the first support rod is hinged to both sides of the limiting part through a first joint; one end of the second support rod is connected to the first support rod through a second joint, and the other end is connected to the third support rod through a third joint; one end of the fourth support rod is connected to the third support rod through a fourth joint, and the other end is hinged to the lower jaw support.

[0015] Furthermore, one end of the movable joint is slidably connected to the fourth support rod, and the other end is slidably connected to the traction rod.

[0016] Furthermore, the first joint includes a first rotating shaft and a first limiting member; one end of the first rotating shaft is fixedly connected to the limiting member, and the other end is detachably connected to the first limiting member; the first support rod is rotatably connected to the first rotating shaft; the first limiting member presses the first support rod against the surface of the limiting member.

[0017] Furthermore, the second joint includes a second rotating shaft, a first rotating member and a second limiting member; one end of the second rotating shaft is slidably connected to the first support rod, and the other end is detachably connected to the second limiting member; the first rotating member is rotatably connected to the first rotating shaft; a first groove is provided on the side of the first rotating member facing the second limiting member; the second support rod slides inside the first groove; the second limiting member presses the second support rod against the inner wall of the first groove, and at the same time presses the first support rod against the inner wall of the second rotating shaft through the first rotating member.

[0018] Furthermore, the third joint includes a third rotating shaft and a third limiting member; one end of the third rotating shaft is slidingly connected to the third support rod, and the other end is detachably connected to the third limiting member; the second support rod is rotatably connected to the third rotating shaft; the third limiting member presses the third support rod on the surface of the second support rod, and at the same time presses the second support rod against the inner wall of the third rotating shaft.

[0019] Furthermore, the fourth joint includes a fourth rotating shaft and a fourth limiting member; one end of the fourth rotating shaft is slidably connected to the fourth support rod, and the other end is detachably connected to the fourth limiting member; the fourth support rod is rotatably connected to the fourth rotating shaft; the fourth limiting member presses the fourth support rod against the surface of the third support rod.

[0020] Furthermore, the movable joint includes a fifth rotating shaft, a second rotating member and a fifth limiting member; one end of the fifth rotating shaft is slidably connected to the fourth support rod, and the other end is detachably connected to the fifth limiting member; the second rotating member is rotatably connected to the fifth rotating shaft; a second groove is provided on the side of the second rotating member facing the fifth limiting member; the traction rod slides inside the second groove; the fifth limiting member presses the traction rod against the inner wall of the second groove, and at the same time presses the fourth support rod against the inner wall of the fifth rotating shaft through the second rotating member.

[0021] Furthermore, the auxiliary portion includes a mounting block and an auxiliary arm; the auxiliary arm is symmetrically arranged on the mounting block; one end of the auxiliary arm is hinged to the mounting block, and the other end is detachably connected to the traction bracket.

[0022] Furthermore, a limiter and a rotating shaft are provided inside the lower jaw support; the rotating shafts are respectively provided on both sides of the lower jaw support; the rotating shaft is rotatably connected to the fourth support rod; and the limiter abuts against the fourth support rod.

[0023] Beneficial effects of the present invention:

[0024] 1. When in use, install the auxiliary part on the mandibular support and connect the auxiliary part to the traction support to fix the position of the traction support. At this time, the limit of the joint by the limiter can be released to change the shape of the support arm, so that the maxillary traction device can be put into the daytime use state or the nighttime use state, taking into account the advantages of the daytime use state to facilitate the patient's eating and the nighttime use state to prevent the traction device from interfering with the patient's sleep;

[0025] 2. By changing the shape of the support arm after unlocking the joint, the magnitude and direction of the traction force of the traction bracket on the patient's maxilla can be changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front view of a maxillary distractor according to the present invention in daily use;

[0027] Figure 2A three-dimensional diagram of a maxillary distractor according to the present invention in daily use;

[0028] Figure 3 This is a front view of a maxillary distractor according to the present invention in a night-time state;

[0029] Figure 4 A perspective view of a maxillary distractor according to the present invention in a nighttime state;

[0030] Figure 5 is a cross-sectional view of a mandibular support implementing the present invention;

[0031] Figure 6 This is a front view of a second limiting joint implementing the present invention;

[0032] Figure 7 is a cross-sectional view of a second position-limiting joint implementing the present invention;

[0033] Figure 8 An assembly diagram of a maxillary distractor and auxiliary components implementing the present invention;

[0034] Figure 9 A perspective view of an auxiliary part for implementing the present invention;

[0035] Figure 10 A front view of an auxiliary part for implementing the present invention;

[0036] Figure 11 A side view of an auxiliary part for implementing the present invention;

[0037] In the figure, 1. limiting part; 2. first support rod; 3. second support rod; 4. third support rod; 5. fourth support rod; 6. lower jaw support; 7. traction rod; 8. traction support; 9. buffer part; 10. auxiliary part; 11. first rotating shaft; 12. first limiting member; 21. second rotating shaft; 22. first rotating member; 23. second limiting member; 31. third rotating shaft; 32. third limiting member; 41. fourth rotating shaft; 42. fourth limiting member; 51. fifth rotating shaft; 52. second rotating member; 53. fifth limiting member; 61. slider; 62. mounting bracket; 63. pushing member; 71. positioning member; 101. mounting block; 102. first auxiliary rod; 103. second auxiliary rod; 104. clamping claw. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of this application more clear, the following will provide a clear and complete description of the technical solutions of this application in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] In this document, “illustrative” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “illustrative” should not be interpreted as a more preferred or more advantageous technical solution.

[0040] To simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled.

[0041] In this document, it should be understood that the terms "center", "up", "down", "front", "back", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In this document, unless otherwise expressly specified or limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Terms such as "connected" and "fixed" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; and can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0043] like Figure 1-11A maxillary traction device is shown, which includes a limiting portion 1, a mandibular support 6, a positioning portion and an auxiliary portion 10. The limiting portion 1 forms a ring-shaped structure. A buffer portion 9 is fixedly connected to one side of the mandibular support 6; when in use, the buffer portion 9 is placed on the patient's mandible to reduce the patient's discomfort. A mounting frame is fixedly connected to the side wall of the mandibular support 6. The positioning portion includes support arms symmetrically arranged on both sides of the limiting portion 1; at least two joints are provided inside the support arms; each joint is provided with a limiting member, which can selectively lock the posture of the joint; one end of the support arm is connected to the limiting portion 1, and the other end is connected to the mandibular support 6. A traction rod 7 is hinged at both ends of the traction bracket 8; a movable joint is provided on the traction rod 7; one end of the movable joint is slidably connected to the support arm, and the other end is slidably connected to the traction rod 7; a positioning member 71 is provided on the movable joint, which can selectively lock the posture of the movable joint; one end of the auxiliary portion 10 is detachably connected to the mounting frame, and the other end is detachably connected to the traction bracket 8. When in use, the auxiliary part 10 is installed on the mandibular support 6 and connected to the traction support 8 to fix the position of the traction support 8. At this time, the limitation of the joint by the limiter can be released to change the shape of the support arm, so that the maxillary traction device can enter the daily use state or the night use state, taking into account the advantages of the daily use state to facilitate the patient's eating and the night use state to prevent the traction device from hindering the patient's sleep.

[0044] Specifically, a connecting column is provided on the traction bracket 8. When in use, the intraoral bracket is bound to the connecting column to provide pulling force to the patient's upper jaw.

[0045] Specifically, one end of the movable joint is slidably connected to the fourth support rod 5, and the other end is slidably connected to the traction rod 7. When the support arm shape is changed, the movable joint is unlocked to change the positional relationship between the traction rod 7 and the fourth support rod 5, thereby preventing the traction bracket 8 from being pulled during the change of the support arm shape, thereby causing the traction bracket 8 to be displaced.

[0046] During use, by unlocking the joint and changing the shape of the support arm, the magnitude and direction of the traction force of the traction bracket 8 on the patient's maxilla can be changed. Compared with the existing integrated support bracket that can only be adjusted by manual bending, this maxillary traction device is more conveniently adjusted through the joint.

[0047] In some embodiments of the present application, an airbag is provided inside the limiting portion 1, and a silicone layer is provided on the contact surface between the limiting portion 1 and the patient's head to reduce the pressure of the limiting portion 1 on the patient's head and increase the patient's comfort.

[0048] like Figure 1-5 As shown, the limiting portion 1 is provided with an opening, and the two ends of the opening are detachably connected, so as to adjust the area of the ring structure formed by the limiting portion 1. When in use, the limiting portion 1 can be worn on the patient's head.

[0049] Specifically, the opening is closed by Velcro.

[0050] Furthermore, an air bag is provided inside the buffer portion 9, and a silicone layer is provided on the outer wall of the buffer portion 9 to reduce the pressure of the buffer portion 9 on the patient's jaw and increase the patient's comfort.

[0051] like Figure 1-5 As shown, the support arm includes a first support rod 2, a second support rod 3, a third support rod 4, and a fourth support rod 5. The first support rod 2 is hinged to both sides of the limiting portion 1 via a first joint. One end of the second support rod 3 is connected to the first support rod 2 via a second joint, and the other end is connected to the third support rod 4 via a third joint. One end of the fourth support rod 5 is connected to the third support rod 4 via a fourth joint, and the other end is hinged to the lower jaw support 6. During use, the support arm can be freely adjusted by releasing the locks on the first, second, third, and fourth joints of the limiting components.

[0052] like Figure 1-5 As shown, the first joint includes a first rotating shaft 11 and a first limiting member 12; one end of the first rotating shaft 11 is fixedly connected to the limiting part 1, and the other end is detachably connected to the first limiting member 12; the first support rod 2 is rotatably connected to the first rotating shaft 11; the first limiting member 12 presses the first support rod 2 against the surface of the limiting part 1, and applies friction force to lock the posture of the first support rod 2 and the limiting part 1.

[0053] Specifically, one end of the first support rod 2 is fixedly connected to the first rotating bracket; the first rotating bracket is an annular structure, which can be sleeved on the outside of the first rotating shaft 11 so that the first rotating bracket is rotatably connected to the first rotating shaft 11;

[0054] Specifically, the first rotating shaft 11 is threadedly connected to the first limiting member 12. The first rotating shaft 11 is provided with a smooth section and a threaded section, wherein the smooth section is connected to the first rotating bracket, and the threaded section is connected to the first limiting member 12.

[0055] In some embodiments of the present application, a first scale is provided on the first rotating shaft 11, and a first indicator arrow is provided on the first support rod 2. The angle between the first support rod 2 and the limiting portion 1 can be read through the first scale and the first indicator arrow.

[0056] like Figure 1-5As shown, the second joint includes a second rotating shaft 21, a first rotating member 22 and a second limiting member 23; one end of the second rotating shaft 21 is slidingly connected to the first support rod 2, and the other end is detachably connected to the second limiting member 23; the first rotating member 22 is rotatably connected to the first rotating shaft 11; the first rotating member 22 is provided with a first groove on the side facing the second limiting member 23; the second support rod 3 slides inside the first groove; the second limiting member 23 presses the second support rod 3 against the inner wall of the first groove, and at the same time presses the first support rod 2 against the inner wall of the second rotating shaft 21 through the first rotating member 22, and applies friction force to lock the posture of the first support rod 2 and the second support rod 3.

[0057] In some embodiments of the present application, a second scale is provided on the second rotating shaft 21, and a second indicator arrow is provided on the second support rod 3. The angle between the second support rod 3 and the first support rod 2 can be read through the second scale and the second indicator arrow.

[0058] During the adjustment process, the second rotating shaft 21 can rotate about the first support rod 2 and can also slide on the first support rod 2. The first rotating member 22 can rotate about the second support rod 3 and can also slide on the second support rod 3. Therefore, the second joint can adjust the angle between the first support rod 2 and the second support rod 3, the distance between the second support rod 3 and the stopper 1, the distance between the first support rod 2 and the third support rod 4, and the angle between the second support rod 3 and the first rotating shaft 11.

[0059] A first through hole is formed inside the second rotating shaft 21 ; the first supporting rod 2 slides inside the first through hole.

[0060] Preferably, the second rotating shaft 21 is threadedly connected to the second limiting member 23. The second rotating shaft 21 is also provided with a smooth section and a threaded section, wherein the smooth section is connected to the first rotating member 22, and the threaded section is connected to the second limiting member 23.

[0061] A cross slot or a straight slot is formed at one end of the second rotating shaft 21 away from the second limiting member 23 to facilitate tightening the second rotating shaft 21 and the second limiting member 23 .

[0062] like Figure 1-5 As shown, the third joint includes a third rotating shaft 31 and a third limiting member 32; one end of the third rotating shaft 31 is slidingly connected to the third support rod 4, and the other end is detachably connected to the third limiting member 32; the second support rod 3 is rotatably connected to the third rotating shaft 31; the third limiting member 32 presses the third support rod 4 on the surface of the second support rod 3, and at the same time presses the second support rod 3 against the inner wall of the third rotating shaft 31, and applies friction force to lock the posture of the second support rod 3 and the third support rod 4.

[0063] In some embodiments of the present application, a third scale is provided on the third rotating shaft 31, and a third indicator arrow is provided on the third support rod 4. The angle between the third support rod 4 and the second support rod 3 can be read through the third scale and the third indicator arrow.

[0064] A second through hole is defined inside the third rotating shaft 31 ; the third supporting rod 4 slides inside the second through hole.

[0065] A second rotating bracket is fixedly connected to one end of the second support rod 3 away from the first support rod 2. The second rotating bracket is an annular structure that can be sleeved outside the second rotating shaft 21. The second rotating bracket is rotatably connected to the third rotating shaft 31.

[0066] The third rotating shaft 31 is threadedly connected to the third limiting member 32 ; the third rotating shaft 31 is also provided with a smooth section and a threaded section, wherein the smooth section is connected to the second rotating bracket, and the threaded section is connected to the third limiting member 32 .

[0067] A cross slot or a slot is formed at one end of the third rotating shaft 31 away from the third limiting member 32 to facilitate tightening the third rotating shaft 31 and the third limiting member 32 .

[0068] like Figure 1-5 As shown, the fourth joint includes a fourth rotating shaft 41 and a fourth limiting member 42; one end of the fourth rotating shaft 41 is slidably connected to the fourth support rod 5, and the other end is detachably connected to the fourth limiting member 42; the fourth support rod 5 is rotatably connected to the fourth rotating shaft 41; the fourth limiting member 42 presses the fourth support rod 5 against the surface of the third support rod 4, and applies friction force to lock the posture of the third support rod 4 and the fourth support rod 5.

[0069] In some embodiments of the present application, a fourth scale is provided on the fourth rotating shaft 41, and a fourth indicator arrow is provided on the fourth support rod 5. The angle between the third support rod 4 and the fourth support rod 5 can be read through the fourth scale and the fourth indicator arrow.

[0070] A third through hole is defined inside the fourth rotating shaft 41 ; the fourth supporting rod 5 slides inside the third through hole.

[0071] The third support rod 4 is fixedly connected to a third rotating bracket at one end away from the second support rod 3. The third rotating bracket is an annular structure that can be sleeved on the outside of the third rotating shaft 31. The third rotating bracket is rotatably connected to the third rotating shaft 31.

[0072] The fourth rotating shaft 41 is threadedly connected to the fourth limiting member 42 ; the fourth rotating shaft 41 is also provided with a smooth section and a threaded section, wherein the smooth section is connected to the third rotating bracket, and the threaded section is connected to the fourth limiting member 42 .

[0073] like Figure 1-5As shown, the movable joint includes a fifth rotating shaft 51, a second rotating member 52 and a fifth limiting member 53; one end of the fifth rotating shaft 51 is slidingly connected to the fourth support rod 5, and the other end is detachably connected to the fifth limiting member 53; the second rotating member 52 is rotatably connected to the fifth rotating shaft 51; a second groove is provided on the side of the second rotating member 52 facing the fifth limiting member 53; the traction rod 7 slides inside the second groove; the fifth limiting member 53 presses the traction rod 7 on the inner wall of the second groove, and at the same time presses the fourth support rod 5 on the inner wall of the fifth rotating shaft 51 through the second rotating member 52, and applies friction force to lock the posture of the fourth support rod 5 and the traction rod 7.

[0074] In some embodiments of the present application, a fifth scale is provided on the fifth rotating shaft 51, and a fifth indicator arrow is provided on the traction rod 7. The angle between the traction rod 7 and the fourth support rod 5 can be read through the fifth scale and the fifth indicator arrow.

[0075] A fourth through hole is defined inside the fifth rotating shaft 51 ; the fourth supporting rod 5 slides inside the fourth through hole.

[0076] During the adjustment process, the fifth rotating shaft 51 can rotate about the fourth support rod 5 and can also slide on the fourth support rod 5. The second rotating member 52 can also rotate about the traction rod 7 and can also slide on the traction rod 7. Therefore, the movable joint can adjust the angle between the fourth support rod 5 and the traction rod 7, the distance between the traction rod 7 and the third support rod 4, the distance between the fourth support rod 5 and the traction bracket 8, and the angle between the traction rod 7 and the lower jaw bracket 6.

[0077] The fifth rotating shaft 51 is threadedly connected to the fifth limiting member 53. The fifth rotating shaft 51 is also provided with a smooth section and a threaded section. The smooth section is connected to the second rotating member 52, and the threaded section is connected to the fifth limiting member 53.

[0078] like Figure 5 As shown, a limiter and a rotating shaft are provided inside the lower jaw support 6; the rotating shafts are respectively provided on both sides of the lower jaw support 6; the rotating shafts are rotatably connected to the fourth support rod 5; and the limiter abuts against the fourth support rod 5.

[0079] Specifically, the limiter includes a slider 61 and a pusher 63. The pusher 63 is detachably connected to the jaw support 6. When the pusher 63 is connected to the jaw support 6, it presses the slider 61 against the side wall of the fourth support rod 5. When the slider is installed on the jaw support 6, the pusher 63 drives the slider 61 toward the fourth support rod 5 and presses against the side wall of the fourth support rod 5, locking the fourth support rod 5 and the jaw support 6 in place through friction.

[0080] Pusher 63 is threadedly connected to the lower jaw support 6. One end of pusher 63 is a screw, and the other end gradually expands. As pusher 63 is tightened, the expanded structure gradually presses against the sidewall of slider 61, driving slider 61 toward the fourth support rod 5. When pusher 63 is tightened, slider 61 presses against the sidewall of the fourth support rod 5.

[0081] like Figure 1-11 As shown, the auxiliary portion 10 comprises a mounting block 101 and an auxiliary arm. The auxiliary arm is symmetrically mounted on the mounting block 101. One end of the auxiliary arm is hinged to the mounting block 101, and the other end is detachably connected to the traction bracket 8. During use, the mounting block 101 is fixed to the mandibular support 6, and then the auxiliary arm is mounted on the traction bracket 8. This restricts the position of the traction bracket 8, allowing the support arm to be adjusted and the configuration of the traction device to be changed.

[0082] Specifically, the lower jaw support 6 is provided with a mounting bracket 62, and the mounting block 101 is mounted on the mounting bracket 62 by bolts during use. When the mounting block 101 is mounted on the lower jaw support 6, the side wall of the mounting block 101 abuts against the side wall of the lower jaw support 6 to prevent the mounting block 101 from deviating.

[0083] Specifically, the auxiliary arm includes a first auxiliary rod 102 and a second auxiliary rod 103; one end of the first auxiliary rod 102 is hinged to the mounting block 101, and the other end is hinged to the second auxiliary rod 103; a clamping claw 104 is provided at one end of the second auxiliary rod 103 away from the first auxiliary rod 102; the clamping claw 104 is detachably connected to the traction bracket 8.

[0084] Specifically, a first positioning member is provided at the connection between the first auxiliary rod 102 and the mounting block 101 to lock the posture of the first auxiliary rod 102 and the mounting block 101 .

[0085] One end of the first positioning member passes through the mounting block 101 and is threadedly connected to the first auxiliary rod 102. In this case, the first auxiliary rod 102 rotates with the first positioning member as the axis.

[0086] Alternatively, the first positioning member is threadedly connected to the mounting block 101 , and the first mounting member passes through the mounting block 101 and abuts against the first auxiliary rod 102 .

[0087] Preferably, a second positioning piece is provided at the connection between the first auxiliary rod 102 and the second auxiliary rod 103 to lock the angle between the first auxiliary rod 102 and the second auxiliary rod 103 .

[0088] Specifically, one end of the second positioning member passes through the first auxiliary rod 102 and is threadedly connected to the second auxiliary rod 103. In this case, the second auxiliary rod 103 rotates around the second positioning member as the axis.

[0089] Alternatively, the second positioning member is threadedly connected to the first auxiliary rod 102 , and the first mounting member passes through the first auxiliary rod 102 and abuts against the second auxiliary rod 103 .

[0090] like Figure 9-11 As shown, the clamping jaw 104 includes a fixed jaw and a movable jaw; the fixed jaw is fixedly connected to the second auxiliary rod 103; and the movable jaw is mounted on the side wall of the fixed jaw through a third positioning member 71.

[0091] Combine Figure 8-11 As shown, the traction bracket 8 is placed inside the fixed claw, and then the movable claw is installed on the fixed claw. The movable claw presses the traction bracket 8 against the inner wall of the fixed claw, and the friction force is used to lock the posture of the clamping jaw 104 and the traction bracket 8.

[0092] Specifically, the third positioning member 71 is a bolt. The third positioning member 71 passes through the movable claw and is threadedly connected to the fixed claw.

[0093] The usage of this embodiment:

[0094] 1. Install the auxiliary part 10 on the lower jaw support 6;

[0095] 2. Loosen the first and second positioning members and install the clamping jaws 104 on the traction bracket 8;

[0096] 3. Use the first positioning member and the second positioning member to define the posture of the auxiliary arm;

[0097] 4. Loosen the first limiting member 12, the second limiting member 23, the third limiting member 32, the fourth limiting member 42, and the fifth limiting member 53 to release the locks on the first joint, the second joint, the third joint, the fourth joint, and the movable joint;

[0098] 5. Adjust the posture of the support arm to put the traction device into daytime or nighttime use mode according to the patient's needs;

[0099] 6. Gradually tighten the first limiting member 12, the second limiting member 23, the third limiting member 32, the fourth limiting member 42, and the fifth limiting member 53 to lock the first joint, the second joint, the third joint, the fourth joint, and the movable joint;

[0100] 7. Loosen the first positioning member and the second positioning member;

[0101] 8. Release the clamping claw 104 to separate the auxiliary arm and the traction bracket 8;

[0102] 9. Remove the mounting block 101 from the lower jaw support 6.

[0103] The above is only a specific embodiment of the present application. Based on the above teachings of the present application, those skilled in the art may make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present application, and the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. A maxillary distractor, characterized in that: It includes: The limiting portion forms a ring-shaped structure; A buffer portion is fixedly connected to one side of the mandibular support; a mounting frame is fixedly connected to the side wall of the mandibular support; The positioning portion includes support arms symmetrically arranged on both sides of the limiting portion; at least two joints are provided inside the support arms; each joint is provided with a limiting member; one end of the support arm is connected to the limiting portion, and the other end is connected to the lower jaw support; The traction bracket has traction rods hinged at both ends; the traction rod is provided with a movable joint; one end of the movable joint is slidably connected to the support arm, and the other end is slidably connected to the traction rod; the movable joint is provided with a positioning piece; The auxiliary part has one end detachably connected to the mounting frame and the other end detachably connected to the traction bracket.

2. The maxillary distractor according to claim 1, characterized in that: The support arm includes a first support rod, a second support rod, a third support rod and a fourth support rod; the first support rod is hinged to both sides of the limiting part through a first joint; one end of the second support rod is connected to the first support rod through a second joint, and the other end is connected to the third support rod through a third joint; one end of the fourth support rod is connected to the third support rod through a fourth joint, and the other end is hinged to the lower jaw support.

3. The maxillary distractor according to claim 2, characterized in that: One end of the movable joint is slidably connected to the fourth support rod, and the other end is slidably connected to the traction rod.

4. The maxillary distractor according to claim 2, characterized in that: The first joint includes a first rotating shaft and a first limiting member; one end of the first rotating shaft is fixedly connected to the limiting member, and the other end is detachably connected to the first limiting member; the first support rod is rotatably connected to the first rotating shaft; the first limiting member presses the first support rod against the surface of the limiting member; Preferably, one end of the first support rod is fixedly connected to a first rotating bracket; the first rotating bracket is rotatably connected to the first rotating shaft; Preferably, the first rotating shaft is threadedly connected to the first limiting member.

5. The maxillary distractor according to claim 2, characterized in that: The second joint includes a second rotating shaft, a first rotating member and a second limiting member; one end of the second rotating shaft is slidably connected to the first support rod, and the other end is detachably connected to the second limiting member; the first rotating member is rotatably connected to the first rotating shaft; a first groove is provided on the side of the first rotating member facing the second limiting member; the second support rod slides inside the first groove; the second limiting member presses the second support rod against the inner wall of the first groove, and at the same time, the first support rod is pressed against the inner wall of the second rotating shaft through the first rotating member; Preferably, a first through hole is provided inside the second rotating shaft; the first supporting rod slides inside the first through hole; Preferably, the second rotating shaft is threadedly connected to the second limiting member.

6. The maxillary distractor according to claim 2, characterized in that: The third joint includes a third rotating shaft and a third limiting member; one end of the third rotating shaft is slidably connected to the third support rod, and the other end is detachably connected to the third limiting member; the second support rod is rotatably connected to the third rotating shaft; the third limiting member presses the third support rod against the surface of the second support rod, and at the same time presses the second support rod against the inner wall of the third rotating shaft; Preferably, the third rotating shaft is threadedly connected to the third limiting member; Preferably, a second through hole is provided inside the third rotating shaft; the third supporting rod slides inside the second through hole; Preferably, one end of the second support rod is fixedly connected to a second rotating bracket; the second rotating bracket is rotatably connected to the third rotating shaft.

7. The maxillary distractor according to claim 2, characterized in that: The fourth joint includes a fourth rotating shaft and a fourth limiting member; one end of the fourth rotating shaft is slidably connected to the fourth support rod, and the other end is detachably connected to the fourth limiting member; the fourth support rod is rotatably connected to the fourth rotating shaft; the fourth limiting member presses the fourth support rod against the surface of the third support rod; Preferably, the fourth rotating shaft is threadedly connected to the fourth limiting member; Preferably, a third through hole is provided inside the fourth rotating shaft; and the fourth supporting rod slides inside the third through hole.

8. The maxillary distractor according to claim 1, characterized in that: The movable joint includes a fifth rotating shaft, a second rotating member and a fifth limiting member; one end of the fifth rotating shaft is slidably connected to the fourth support rod, and the other end is detachably connected to the fifth limiting member; the second rotating member is rotatably connected to the fifth rotating shaft; a second groove is provided on the side of the second rotating member facing the fifth limiting member; the traction rod slides inside the second groove; the fifth limiting member presses the traction rod against the inner wall of the second groove, and at the same time presses the fourth support rod against the inner wall of the fifth rotating shaft through the second rotating member; Preferably, the fifth rotating shaft is threadedly connected to the fifth limiting member; Preferably, a fourth through hole is provided inside the fifth rotating shaft; and the fourth support rod slides inside the fourth through hole.

9. The maxillary distractor according to claim 1, characterized in that: The auxiliary part includes a mounting block and an auxiliary arm; the auxiliary arm is symmetrically arranged on the mounting block; one end of the auxiliary arm is hinged to the mounting block, and the other end is detachably connected to the traction bracket; Preferably, the auxiliary arm includes a first auxiliary rod and a second auxiliary rod; one end of the first auxiliary rod is hinged to the mounting block, and the other end is hinged to the second auxiliary rod; the second auxiliary rod is provided with a clamping claw at one end away from the first auxiliary rod; the clamping claw is detachably connected to the traction bracket; Preferably, a first positioning member is provided at the connection between the first auxiliary rod and the mounting block; Preferably, a second positioning member is provided at the connection between the first auxiliary rod and the second auxiliary rod; Preferably, the clamping jaw includes a fixed jaw and a movable jaw; the fixed jaw is fixedly connected to the second auxiliary rod; the movable jaw is mounted on the side wall of the fixed jaw through a third positioning member.

10. The maxillary distractor according to any one of claims 1 to 9, characterized in that: A stopper and a rotating shaft are provided inside the lower jaw support; the rotating shafts are respectively provided on both sides of the lower jaw support; the rotating shaft is rotatably connected to the fourth support rod; the stopper abuts against the fourth support rod; Preferably, the limiter includes a slider and a pusher; the pusher is detachably connected to the lower jaw support; when the pusher is connected to the lower jaw support, the pusher presses the slider against the side wall of the fourth support rod.

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