Maxillary distractor

Abstract

The application belongs to the technical field of oral orthodontic instruments, and particularly relates to a maxillary bone tractor which comprises a limiting part, a jaw support, a positioning part, a traction support and an auxiliary part.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oral orthodontic instruments, and particularly relates to a maxillary bone distractor. BACKGROUND

[0002] For patients with insufficient transverse maxillary development or narrow dental arch, the most commonly used method of orthodontic treatment is maxillary palatal expansion. Palatal expansion technology transmits orthopedic force to various bone structures of the maxillofacial region through the load of maxillary teeth, causing bone remodeling. The effect of palatal expansion is closely related to factors such as the force value, action time and retention time of the expansion arch, and the age of the patient. At present, orthodontic palatal expansion can be divided into rapid palatal expansion (RPE) and slow palatal expansion (SPE).

[0003] Rapid palatal expansion (RPE) is to increase the force every day, so the accumulated orthodontic force can reach several kilograms quickly, which can expand the palatal suture and cause less tooth inclination, and maximize the increase of bone mass greater than the inclination of teeth. It can produce more bone changes, make the palatine high, and the anchorage tooth eruption more obvious. However, the larger orthopedic force generated by the maxillary RPE has a certain impact on the teeth, and the necessity of the larger orthopedic force is also questioned.

[0004] Slow palatal expansion (SPE) is to increase the force once a week, and the orthodontic force is relatively constant, without dramatic increase, thereby reducing the accumulation of tissue fluid and bleeding, and being more in line with the physiological formation and physiological response of bone. However, SPE produces more dental arch expansion, and the tooth effect is obvious, such as molar inclination and rotation; RPE almost all cases of palatal suture appear gaps; and SPE only half of the cases of palatal suture appear gaps; RPE has more changes in the sagittal and vertical directions, and SPE produces more mandibular posterior rotation.

[0005] Angle Class III malocclusion, commonly known as "overbite", is a common malocclusion in orthodontic clinics, with a high incidence. In the growth and development period, the malformation of Angle Class III malocclusion patients will gradually worsen with the continuous forward growth of the mandible, and the malformation will gradually develop from dental, functional to bone, which seriously affects the development of the patient's jaw, oral function and facial beauty. During the growth and development period, changing environmental factors can affect the growth amount and growth direction of the craniofacial structure.

[0006] Clinically, external traction appliances are often used for early Angle Class III dental, functional and skeletal malocclusion, and treatment is performed through chin cups and maxillary forward traction devices. Such traction appliances have day and night types. The day type traction appliance is mainly distributed on the cheeks of the patient to facilitate eating. The night type traction appliance is mainly distributed in front of the patient to prevent the traction appliance from hindering the patient's sleep. However, the patient can only choose one of the day and night types according to his own needs, and cannot change them by himself. SUMMARY

[0007] In view of the above problems, the application discloses a maxillary distractor.

[0008] A maxillary distractor comprises:

[0009] A limiting part forms a ring structure.

[0010] A lower jaw support is fixedly connected with a buffer on one side.

[0011] A positioning part comprises support arms symmetrically arranged on both sides of the limiting part.

[0012] A traction support is hingedly connected with traction rods at both ends.

[0013] An auxiliary part is detachably connected with the mounting bracket at one end and detachably connected with the traction support at the other end.

[0014] Further, the support arms comprise first, second, third and fourth support rods.

[0015] Further, the movable joint is slidably connected with the fourth support rod at one end and slidably connected with the traction rod at the other end.

[0016] Further, the first joint comprises a first rotating shaft and a first limiting part.

[0017] Further, the second joint comprises a second rotating shaft, a first rotating part and a second limiting part.

[0018] Further, the third joint comprises a third rotating shaft and a third limiting piece; one end of the third rotating shaft is in sliding connection with the third supporting rod, and the other end is detachably connected with the third limiting piece; the second supporting rod is in rotating connection with the third rotating shaft; the third limiting piece presses the third supporting rod on the surface of the second supporting rod, and simultaneously presses the second supporting rod on the inner wall of the third rotating shaft.

[0019] Further, the fourth joint comprises a fourth rotating shaft and a fourth limiting piece; one end of the fourth rotating shaft is in rotating connection with the fourth supporting rod, and the other end is detachably connected with the fourth limiting piece; the fourth supporting rod is in rotating connection with the fourth rotating shaft; the fourth limiting piece presses the fourth supporting rod on the surface of the third supporting rod.

[0020] Further, the movable joint comprises a fifth rotating shaft, a second rotating piece and a fifth limiting piece; one end of the fifth rotating shaft is in sliding connection with the fourth supporting rod, and the other end is detachably connected with the fifth limiting piece; the second rotating piece is in rotating connection with the fifth rotating shaft; the side of the second rotating piece facing the fifth limiting piece is provided with a second groove; the traction rod slides in the second groove; the fifth limiting piece presses the traction rod on the inner wall of the second groove, and simultaneously presses the fourth supporting rod on the inner wall of the fifth rotating shaft through the second rotating piece.

[0021] Further, the auxiliary part comprises a mounting block and an auxiliary arm; the auxiliary arm is symmetrically arranged on the mounting block; one end of the auxiliary arm is hingedly connected with the mounting block, and the other end is detachably connected with the traction support.

[0022] Further, the inside of the lower jaw support is provided with a limiting piece and a rotating shaft; the rotating shafts are arranged on the two sides of the lower jaw support respectively; the rotating shafts are in rotating connection with the fourth supporting rods; the limiting piece is in abutment with the fourth supporting rods.

[0023] The beneficial effects of the present application are as follows:

[0024] 1. When in use, the auxiliary part is mounted on the lower jaw support, and the auxiliary part is connected with the traction support, so that the position of the traction support is fixed, at this time, the limiting piece can be released from the limitation of the joint, so as to change the shape of the supporting arm, so that the maxillary distractor enters the daily use state or the night use state, and the advantages of the daily use state for facilitating the patient to eat and the night use state for preventing the distraction from hindering the patient to sleep are considered;

[0025] 2. By changing the shape of the supporting arm after unlocking the joint, the size and direction of the traction force of the traction support on the upper jaw of the patient can be changed. BRIEF DESCRIPTION OF DRAWINGS

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

[0027] Figure 2A perspective view of the maxilla distractor in the daytime state according to the present application;

[0028] Figure 3 A front view of the maxilla distractor in the nighttime state according to the present application;

[0029] Figure 4 A perspective view of the maxilla distractor in the nighttime state according to the present application;

[0030] Figure 5 A sectional view of the mandible support according to the present application;

[0031] Figure 6 A front view of the second limiting joint according to the present application;

[0032] Figure 7 A sectional view of the second limiting joint according to the present application;

[0033] Figure 8 An assembly view of the maxilla distractor and the auxiliary assembly according to the present application;

[0034] Figure 9 A perspective view of the auxiliary part according to the present application;

[0035] Figure 10 A front view of the auxiliary part according to the present application;

[0036] Figure 11 A side view of the auxiliary part according to the present application;

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

[0038] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] In the present document, "illustrative" means "serving as an instance, example, or illustration" and should not be construed as a preferred or advantageous implementation over other implementations.

[0040] In order to make the drawings simple, only the parts related to the present application are schematically shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawings simple and convenient to understand, in some drawings, only one of the parts with the same structure or function is schematically shown, or only one of them is marked.

[0041] In the present document, it should be understood that the terms "center", "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In the present document, unless otherwise explicitly specified and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] As Figures 1-11An upper jaw traction device is shown, which comprises a limiting part 1, a lower jaw support 6, a positioning part and an auxiliary part 10. The limiting part 1 forms a ring structure. The lower jaw support 6 is fixedly connected with a buffer part 9 on one side; the buffer part 9 is used to pad the lower jaw of the patient to reduce the discomfort of the patient. The lower jaw support 6 is fixedly connected with a mounting frame on the side wall. The positioning part comprises support arms symmetrically arranged on both sides of the limiting part 1; the inside of the support arm is provided with at least two joints; the joints are each provided with a limiting part, which can be selected to lock the posture of the joint; one end of the support arm is connected with the limiting part 1, and the other end is connected with the lower jaw support 6. The traction support 8 is hingedly connected with a traction rod 7 at both ends; the traction rod 7 is provided with a movable joint; one end of the movable joint is slidably connected with the support arm, and the other end is slidably connected with the traction rod 7; the movable joint is provided with a positioning part 71, which can be selected to lock the posture of the movable joint; one end of the auxiliary part 10 is detachably connected with the mounting frame, and the other end is detachably connected with the traction support 8. When in use, the auxiliary part 10 is mounted on the lower jaw support 6, and the auxiliary part 10 is connected with the traction support 8, so that the position of the traction support 8 is fixed, and at this time the limitation of the joint by the limiting part can be released to change the shape of the support arm, so that the upper jaw traction device enters the daily use state or the night use state, which takes into account the advantages of the daily use state to facilitate the patient to eat and the night use state to prevent the traction device from hindering the patient to sleep.

[0044] Specifically, the traction support 8 is provided with a connecting column, and the intraoral support is bound to the connecting column in use to provide a pulling force to the upper jaw of the patient.

[0045] Specifically, one end of the movable joint is slidably connected with the fourth support rod 5, and the other end is slidably connected with the traction rod 7. In the process of changing the shape of the support arm, the movable joint is unlocked, so that the positional relationship between the traction rod 7 and the fourth support rod 5 can be changed to prevent the traction support 8 from being pulled during the process of changing the shape of the support arm, thereby causing the traction support 8 to be deviated.

[0046] In the process of use, the shape of the support arm is changed after the joint is unlocked, so that the size and direction of the traction force of the traction support 8 to the upper jaw of the patient can be changed. Compared with the existing integrated support frame which can only be adjusted by manual bending, the upper jaw traction device is adjusted by a more convenient joint.

[0047] In some embodiments of the present application, the inside of the limiting part 1 is provided with an air bag, and the contact surface of the limiting part 1 with the head of the patient is provided with a silica gel layer to reduce the pressure of the limiting part 1 on the head of the patient and increase the comfort of the patient.

[0048] As shown in Figures 1-5 The limiting part 1 has an opening, and the two ends of the opening are detachably connected, so that the area of the ring structure surrounded by the limiting part 1 can be adjusted. In use, the limiting part 1 can be worn on the head of the patient.

[0049] Specifically, the opening is closed by a magic tape.

[0050] Further, the inside of the buffer part 9 is provided with an air bag, and the outside wall of the buffer part 9 is provided with a silica gel layer, so as to reduce the pressure of the buffer part 9 on the lower jaw of the patient and increase the comfort of the patient.

[0051] As shown in Figures 1-5 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 hingedly connected to the two sides of the limiting part 1 through a first joint; one end of the second support rod 3 is connected to the first support rod 2 through a second joint, and the other end is connected to the third support rod 4 through a third joint; one end of the fourth support rod 5 is connected to the third support rod 4 through a fourth joint, and the other end is hingedly connected to the lower jaw support 6. In use, the locking of the first joint, the second joint, the third joint, and the fourth joint by the limiting part is released, so that the shape of the support arm can be adjusted freely.

[0052] As shown in Figures 1-5 The first joint includes a first rotating shaft 11 and a first limiting part 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 part 12; the first support rod 2 is rotationally connected to the first rotating shaft 11; the first limiting part 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 a first rotating bracket; the first rotating bracket has a ring structure and can be sleeved outside the first rotating shaft 11, so that the first rotating bracket is rotationally connected to the first rotating shaft 11.

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

[0055] In some embodiments of the present application, the first rotating shaft 11 is provided with a first scale, and the first support rod 2 is provided with a first indication arrow. Through the first scale and the first indication arrow, the angle of the included angle between the first support rod 2 and the limiting part 1 can be read.

[0056] As shown in Figures 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 slidably 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 has 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, the first rotating member 22 presses the first support rod 2 against the inner wall of the second rotating shaft 21, using friction to lock the posture of the first support rod 2 and the second support rod 3.

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

[0058] During adjustment, the second rotating shaft 21 can rotate around the first support rod 2 and also slide on the first support rod 2. The first rotating member 22 can rotate around the second support rod 3 and 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, as well as the distance between the second support rod 3 and the limiting part 1, the distance between the first support rod 2 and the third support rod 4, and also the angle between the second support rod 3 and the first rotating shaft 11.

[0059] The second rotating shaft 21 has a first through hole inside; the first support 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. The smooth section is connected to the first rotating member 22, and the threaded section is connected to the second limiting member 23.

[0061] The end of the second rotating shaft 21 away from the second limiting member 23 is provided with a cross groove or a slot to facilitate tightening the second rotating shaft 21 and the second limiting member 23.

[0062] like Figures 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 slidably 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 against 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, using friction to lock the posture of the second support rod 3 and the third support rod 4.

[0063] In some embodiments of the present application, the third pivot 31 is provided with a third scale, and the third support rod 4 is provided with a third indication arrow. The third scale and the third indication arrow can be used to read the angle of the third support rod 4 and the second support rod 3.

[0064] The third pivot 31 is internally provided with a second through hole, and the third support rod 4 slides inside the second through hole.

[0065] The end of the second support rod 3 away from the first support rod 2 is fixedly connected with a second rotating bracket. The second rotating bracket has a ring structure and can be sleeved outside the second pivot 21. The second rotating bracket is rotationally connected with the third pivot 31.

[0066] The third pivot 31 is threadedly connected with the third limiting piece 32. The third pivot 31 is also provided with a smooth section and a threaded section. The smooth section is connected with the second rotating bracket, and the threaded section is connected with the third limiting piece 32.

[0067] The end of the third pivot 31 away from the third limiting piece 32 is provided with a cross slot or a slot, so as to tighten the third pivot 31 and the third limiting piece 32.

[0068] As shown in Figures 1-5 The fourth joint includes a fourth pivot 41 and a fourth limiting piece 42. One end of the fourth pivot 41 is rotationally connected with the fourth support rod 5, and the other end is detachably connected with the fourth limiting piece 42. The fourth support rod 5 is rotationally connected with the fourth pivot 41. The fourth limiting piece 42 presses the fourth support rod 5 against the surface of the third support rod 4, and locks the posture of the third support rod 4 and the fourth support rod 5 by using friction force.

[0069] In some embodiments of the present application, the fourth pivot 41 is provided with a fourth scale, and the fourth support rod 5 is provided with a fourth indication arrow. The fourth scale and the fourth indication arrow can be used to read the angle of the third support rod 4 and the fourth support rod 5.

[0070] The fourth pivot 41 is internally provided with a third through hole, and the fourth support rod 5 slides inside the third through hole.

[0071] The end of the third support rod 4 away from the second support rod 3 is fixedly connected with a third rotating bracket. The third rotating bracket has a ring structure and can be sleeved outside the third pivot 31. The third rotating bracket is rotationally connected with the third pivot 31.

[0072] The fourth pivot 41 is threadedly connected with the fourth limiting piece 42. The fourth pivot 41 is also provided with a smooth section and a threaded section. The smooth section is connected with the third rotating bracket, and the threaded section is connected with the fourth limiting piece 42.

[0073] As shown in Figures 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 slidably 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; the second rotating member 52 has a second groove on the side 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 against the inner wall of the second groove, and at the same time, the second rotating member 52 presses the fourth support rod 5 against the inner wall of the fifth rotating shaft 51, using friction to lock the posture of the fourth support rod 5 and the traction rod 7.

[0074] In some embodiments of this 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] The fifth rotating shaft 51 has a fourth through hole inside; the fourth support rod 5 slides inside the fourth through hole.

[0076] During adjustment, the fifth rotating shaft 51 can rotate around the fourth support rod 5 and also slide on the fourth support rod 5. The second rotating component 52 can rotate around the traction rod 7 and 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, as well as 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 similarly, the angle between the traction rod 7 and the 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, the mandibular support 6 has a limiter and a rotating shaft inside; the rotating shafts are respectively set on both sides of the mandibular support 6; the rotating shafts are rotatably connected to the fourth support rod 5; 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, the pusher 63 presses the slider 61 against the side wall of the fourth support rod 5. When mounted on the jaw support 6, the pusher 63 drives the slider 61 to move towards the fourth support rod 5 and presses it against the side wall of the fourth support rod 5, using friction to lock the posture of the fourth support rod 5 and the jaw support 6.

[0080] The pushing member 63 is threadedly connected with the lower jaw support 6. One end of the pushing member 63 is a screw rod, and the other end is gradually enlarged. With the pushing member 63 being continuously screwed, the enlarged structure is gradually pressed against the side wall of the sliding block 61, so as to drive the sliding block 61 to move towards the fourth supporting rod 5. When the pushing member 63 is screwed, the sliding block 61 is pressed against the side wall of the fourth supporting rod 5.

[0081] As shown in Figures 1-11 The auxiliary part 10 comprises a mounting block 101 and auxiliary arms. The auxiliary arms are symmetrically arranged on the mounting block 101. One end of the auxiliary arm is hingedly connected with the mounting block 101, and the other end is detachably connected with the traction support 8. In use, the mounting block 101 is fixed on the lower jaw support 6, and then the auxiliary arm is mounted on the traction support 8, so as to limit the position of the traction support 8, adjust the posture of the supporting arm, and change the form of the traction device.

[0082] Specifically, the lower jaw support 6 is provided with a mounting support 62. In use, the mounting block 101 is mounted on the mounting support 62 through bolts. 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, so as to prevent the mounting block 101 from being deviated.

[0083] Specifically, the auxiliary arm comprises a first auxiliary rod 102 and a second auxiliary rod 103. One end of the first auxiliary rod 102 is hingedly connected with the mounting block 101, and the other end is hingedly connected with the second auxiliary rod 103. The end of the second auxiliary rod 103 away from the first auxiliary rod 102 is provided with a clamping jaw 104. The clamping jaw 104 is detachably connected with the traction support 8.

[0084] Specifically, the connection between the first auxiliary rod 102 and the mounting block 101 is provided with a first positioning member, so as 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 with the first auxiliary rod 102. In this case, the first auxiliary rod 102 rotates around the first positioning member as the axis.

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

[0087] Preferably, the connection between the first auxiliary rod 102 and the second auxiliary rod 103 is provided with a second positioning member, so as 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 with 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 with the first auxiliary rod 102, and the first mounting member is abutted against the second auxiliary rod 103 after passing through the first auxiliary rod 102.

[0090] As shown in Figures 9-11 the clamping jaw 104 comprises a fixed jaw and a movable jaw; the fixed jaw is fixedly connected with the second auxiliary rod 103; the movable jaw is mounted on the side wall of the fixed jaw through the third positioning member 71.

[0091] As shown in Figures 8-11 the traction bracket 8 is placed inside the fixed jaw, and then the movable jaw is mounted on the fixed jaw, so that the movable jaw presses the traction bracket 8 on the inner wall of the fixed jaw, and the posture of the clamping jaw 104 and the traction bracket 8 is locked by the friction force.

[0092] Specifically, the third positioning member 71 is a bolt. The third positioning member 71 is threadedly connected with the fixed jaw after passing through the movable jaw.

[0093] The use method of the embodiment is as follows:

[0094] 1. The auxiliary part 10 is mounted on the lower jaw bracket 6;

[0095] 2. The first positioning member and the second positioning member are loosened, and the clamping jaw 104 is mounted on the traction bracket 8;

[0096] 3. The posture of the auxiliary arm is limited by the first positioning member and the second positioning member;

[0097] 4. 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 are loosened to release the locking of the first joint, the second joint, the third joint, the fourth joint, and the movable joint;

[0098] 5. The posture of the support arm is adjusted, and the traction device is brought into a daily use state or a night use state according to the needs of the patient;

[0099] 6. 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 are gradually tightened to lock the first joint, the second joint, the third joint, the fourth joint, and the movable joint;

[0100] 7. The first positioning member and the second positioning member are loosened;

[0101] 8. The clamping jaw 104 is loosened, and the auxiliary arm is separated from the traction bracket 8;

[0102] 9. The mounting block 101 is removed from the lower jaw bracket 6.

[0103] The above merely illustrates the specific embodiments of the present application, and based on the above teaching of the present application, other improvements or modifications can be made by those skilled in the art on the basis of the above embodiments. Those skilled in the art should understand that the above specific description is only for better explaining the purpose of the present application, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A maxillary traction device, characterized in that, It includes: The limiting part forms a ring structure; A buffer part is fixedly connected to one side of the mandibular support; a mounting bracket is fixedly connected to the side wall of the mandibular support. The positioning part includes support arms symmetrically arranged on both sides of the limiting part; the support arms have at least two joints inside; each joint is provided with a limiting member; one end of the support arm is connected to the limiting part, and the other end is connected to the jaw support. A traction bracket has traction rods hinged at both ends; each traction rod has a movable joint; one end of the movable joint is slidably connected to a support arm, and the other end is slidably connected to the traction rod; the movable joint has a positioning element. An auxiliary part is detachably connected at one end to a mounting bracket and at the other end to a traction bracket. The auxiliary part includes a mounting block and auxiliary arms. The auxiliary arms are symmetrically arranged on the mounting block. One end of each auxiliary arm is hinged to the mounting block, and the other end is detachably connected to the traction bracket. Each 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. A gripper is provided at the end of the second auxiliary rod away from the first auxiliary rod. The gripper is detachably connected to the traction bracket. A first positioning element is provided at the connection between the first auxiliary rod and the mounting block. A second positioning element is provided at the connection between the first auxiliary rod and the second auxiliary rod. The gripper includes a fixed gripper and a movable gripper. The fixed gripper is fixedly connected to the second auxiliary rod. The movable gripper is mounted on the side wall of the fixed gripper via a third positioning element.

2. The maxillary traction device 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 via a first joint; one end of the second support rod is connected to the first support rod via a second joint, and the other end is connected to the third support rod via a third joint; one end of the fourth support rod is connected to the third support rod via a fourth joint, and the other end is hinged to the jaw support.

3. A maxillary traction device 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. A maxillary traction device 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 part, 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 onto the surface of the limiting part.

5. A maxillary traction device according to claim 4, characterized in that, One end of the first support rod is fixedly connected to a first rotating bracket; the first rotating bracket is rotatably connected to a first rotating shaft.

6. A maxillary traction device according to claim 5, characterized in that, The first rotating shaft is threadedly connected to the first limiting member.

7. A maxillary traction device 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; the first rotating member has a first groove on the side 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 rotating member presses the first support rod against the inner wall of the second rotating shaft.

8. A maxillary traction device according to claim 7, characterized in that, The second rotating shaft has a first through hole inside; the first support rod slides inside the first through hole.

9. A maxillary traction device according to claim 8, characterized in that, The second rotating shaft is threadedly connected to the second limiting member.

10. A maxillary traction device 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, while simultaneously pressing the second support rod against the inner wall of the third rotating shaft.

11. A maxillary traction device according to claim 10, characterized in that, The third rotating shaft is threadedly connected to the third limiting component.

12. A maxillary traction device according to claim 11, characterized in that, The third rotating shaft has a second through hole inside; the third support rod slides inside the second through hole.

13. A maxillary traction device according to claim 12, characterized in that, One end of the second support rod is fixedly connected to a second rotating bracket; the second rotating bracket is rotatably connected to a third rotating shaft.

14. A maxillary traction device 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.

15. A maxillary traction device according to claim 14, characterized in that, The fourth rotating shaft is threadedly connected to the fourth limiting component.

16. A maxillary traction device according to claim 15, characterized in that, The fourth rotating shaft has a third through hole inside; the fourth support rod slides inside the third through hole.

17. A maxillary traction device according to claim 1, characterized in that, The movable joint includes a fifth rotating shaft, a second rotating component, and a fifth limiting component; 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 component; the second rotating component is rotatably connected to the fifth rotating shaft; the second rotating component has a second groove on the side facing the fifth limiting component; the traction rod slides inside the second groove; the fifth limiting component presses the traction rod against the inner wall of the second groove, and at the same time, the second rotating component presses the fourth support rod against the inner wall of the fifth rotating shaft.

18. A maxillary traction device according to claim 17, characterized in that, The fifth rotating shaft is threadedly connected to the fifth limiting member.

19. A maxillary traction device according to claim 18, characterized in that, The fifth rotating shaft has a fourth through hole inside; the fourth support rod slides inside the fourth through hole.

20. A maxillary traction device according to any one of claims 4, 6, 9, 10, 11, 14, 15, and 18, characterized in that, The mandibular support is equipped with a limiter and a rotating shaft inside; the rotating shafts are respectively located on both sides of the mandibular support; the rotating shafts are rotatably connected to the fourth support rod; the limiter abuts against the fourth support rod.

21. A maxillary traction device according to claim 20, characterized in that, The limiter includes a slider and a pusher; the pusher is detachably connected to the jaw support; when the pusher is connected to the jaw support, the pusher presses the slider against the side wall of the fourth support rod.

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