Intraoral expansion device

Abstract

The invention discloses an intraoral expansion device, and belongs to the technical field of oral correction, the intraoral expansion device comprises main plates, limiting rods are movably arranged in the main plates, the main plates are symmetrically distributed about the center of the limiting rods, and long pins are in threaded connection with the interiors of the main plates on the left side and the right side; the connecting pipe is connected to the tail end of the long pin in a welded mode; the locking assembly is arranged in the main plate and comprises ejector rods arranged in the main plate in a sliding mode, and the ejector rods correspond to the limiting rods in a one-to-one mode. When the intraoral expansion device for treating the bony III-type malocclusion deformity is used, an external long rod part is inserted into a rotating hole, a connecting pipe and a long pin can be driven to rotate through the rotating hole, when the long pin rotates, under the action of a limiting rod, main plates on the left side and the right side are driven to be away from each other, then a supporting rod and a limiting frame are away from each other, and the device is used for treating the bony III-type malocclusion deformity. At the moment, the supporting rod and the limiting frame can well support the interior of the oral cavity.

Description

Technical Field

[0001] The invention relates to the technical field of oral correction, and in particular to an intraoral expansion device. Background Art

[0002] Insufficient arch width is usually manifested as narrowed arch, high arched palate, labial inclination of anterior teeth, partial crossbite or even reverse locking of posterior teeth, and crowded dentition. Insufficient arch width can occur in the maxilla or mandible; in both anterior teeth and posterior teeth; in both sides or in one side. Arch expansion therapy is the best way to solve the narrow arch. At this time, an intraoral arch expansion device is required, such as a lingual fixed arch expander with publication number CN207605023U, including a left pressure part, a left sliding sleeve, a left support rod connecting the left pressure part and the left sliding sleeve, a right pressure part, a right sliding sleeve, a right support rod connecting the right pressure part and the right sliding sleeve, two guide rods linearly slidingly matched with the left sliding sleeve and the right sliding sleeve, and a screw threadedly matched with the left sliding sleeve and the right sliding sleeve. The utility model of the lingual fixed arch expander can expand the width of the dental arch, thereby increasing the total length of the dental arch. Its pressure-applying part is only bonded to the lingual side of the tooth, and the bonding surface is provided with concave and convex points for fixing the bonding material. The installation operation is simple and the bonding strength is good. The pressure-applying part and the support rod are an integrated structure, and the surface of the junction between the two is smooth. It is small in size, and the pressure-applying part matches the natural shape of the lingual side of the tooth, so the contact with the oral tissue is more comfortable and the cleanliness of the mouth is easier to maintain. It will not affect the orthodontic treatment on the buccal side of the tooth, and internal and external corrections can be performed on the teeth at the same time, shortening the orthodontic treatment time. Another example is an intraoral traction device for the maxillary bone with a publication number of CN204600827U, which includes two spiral expanders arranged front and back, the two spiral expanders are arranged perpendicular to each other, and the two spiral expanders are fixedly connected by a connecting rod, and a plurality of fixed brackets are respectively fixed on the two spiral expanders. The utility model has the characteristics of convenient surgical insertion, multi-dimensional traction direction, and increased traction amount; the traction device is intraoral, has the advantages of small size, concealed installation position, easy cleaning, no pressure on the palatal mucosa, and can be adjusted by the patient himself, with little impact on the patient's appearance and daily life.

[0003] During use, after applying force to the expander, the expander needs to be locked so that it can better support the inside of the oral cavity. However, the device in the above application does not have a locking structure during use, resulting in a general supporting effect of the expander, which affects the treatment process and brings unnecessary trouble to the patient. Summary of the invention

[0004] The object of the present invention is to provide an intraoral expander to solve the problem proposed in the above background technology that during use, the expander does not have a locking structure, resulting in general supporting effect, affecting the treatment process and causing unnecessary trouble to the patient.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an intraoral expansion device, comprising a main board, a limit rod is movably arranged inside the main board, and the main board is symmetrically distributed about the center of the limit rod, and the interiors of the left and right main boards are both threadedly connected with long pins, a connecting pipe, the connecting pipe is welded to the end of the long pin, a fixed block, the fixed block is welded to the surface of the main board, and the side of the fixed block is welded to a support rod, and a connecting rod is rotatably arranged inside the support rod, a limit frame, the side of the limit frame is fixedly connected to the connecting rod, and a locking assembly is arranged inside the main board, including a push rod slidably arranged inside the main board, and the push rod corresponds to the limit rod one by one.

[0006] Preferably, rotation holes are provided on the surface of the connecting pipe, and the rotation holes are distributed at equal angles on the surface of the connecting pipe.

[0007] Preferably, a limiting block is fixedly mounted on the surface of the limiting rod, and the limiting blocks are symmetrically distributed about the center of the limiting rod, and limiting grooves corresponding to the limiting blocks are opened inside the main board.

[0008] Preferably, a ball is rotatably arranged inside the connecting rod, and the other side of the ball is rotatably arranged inside the supporting rod.

[0009] Preferably, a connecting shaft is rotatably provided inside the main board, and a protrusion is slidably provided inside the connecting shaft, and the surface of the protrusion is initially in contact with the inner wall of the main board, and a groove is provided inside the main board.

[0010] Preferably, a pressure block is slidably provided inside the connecting shaft, and a vertical rod is welded to the lower surface of the pressure block, and a bottom plate is welded to the lower surface of the vertical rod, and a push rod is fixedly connected to the lower surface of the connecting shaft.

[0011] Preferably, both left and right sides of the bottom plate are inclined, and the surface of the bottom plate fits the surface of the protrusion, and a lap block is fixedly connected to the upper surface of the protrusion, and a groove corresponding to the protrusion is opened inside the main board.

[0012] Preferably, a third spring having an elastic reset function is fixedly mounted on the side of the overlap block, and the other side of the third spring is fixedly connected to the inner wall of the connecting shaft, and the third spring is initially in a compressed state.

[0013] Preferably, the push rod corresponds one-to-one to the push rod, and sliders are fixedly installed on the upper and lower sides of the push rod, and a first spring that plays an elastic reset role is fixedly installed on the side of the slider, and the other side of the first spring is fixedly connected to the inner wall of the main board, and the inside of the main board is provided with sliding grooves corresponding one-to-one to the sliders.

[0014] Preferably, a second spring having an elastic return function is fixedly mounted on the lower surface of the pressure block, and the other side of the second spring is fixedly connected to the inner wall of the connecting shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the intraoral expansion device for treating skeletal Class III malocclusion adopts a new structural design, and its specific contents are as follows: (1) When using the intraoral expansion device for treating skeletal Class III malocclusion, the external long rod component is inserted into the rotating hole, and the connecting tube and the long pin can be driven to rotate through the rotating hole. When the long pin rotates, the main boards on the left and right sides are driven to move away from each other under the action of the limit rod, and then the support rod and the limit frame are driven away. At this time, the support rod and the limit frame can well support the inside of the oral cavity; Furthermore, the limit frame can be rotated inside the support rod through the connecting rod and the ball bearing, so that the staff can adjust the angle of the limit frame well, so that the limit frame can better match the teeth, which is convenient for the staff to adjust the sagittal growth and can also control the vertical height well; (2) During use of the intraoral expansion device for treating skeletal Class III malocclusion, in the initial state, the protrusion presses against the inner wall of the main board. At this time, the friction force on the connecting shaft is relatively large and the connecting shaft will not rotate. After adjusting the position of the support rod through the rotating hole, the external long rod can be inserted into the connecting shaft to press the pressure block, and then the pressure block drives the vertical rod and the bottom plate to descend. At this time, the protrusion moves toward the inner direction of the connecting shaft under the action of the overlap block and the third spring. At this time, the friction force between the connecting shaft and the main board is relatively small, and then the connecting shaft can be rotated to drive the push rod to rotate. The rotation of the push rod will push the push rod, causing the push rod to move toward the direction of the limit rod. Finally, the push rod presses against the limit rod, causing the friction force between the limit rod and the main board to be relatively large, so that the main board will not move. After adjusting the angle, the main board will not move, and the stability is high. Furthermore, after the push rod presses against the limit rod, the pressure block is released. At this time, the pressure block rises to its original position under the action of the second spring, and then the bottom plate pushes the protrusion again, so that the protrusion presses against the inner wall of the main board again. At this time, the connecting shaft will not self-rotate under the action of the friction force between the protrusion and the main board, thereby ensuring stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front view structure of the main board of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of the mainboard of the present invention; Figure 3 This is a schematic diagram of the structure of the distribution state of the rotating holes of the present invention; Figure 4 It is a schematic diagram of the connection structure between the support rod and the limit frame of the present invention; Figure 5 It is a schematic diagram of the side cross-sectional structure of the main board of the present invention; Figure 6 This is a schematic diagram of the connection structure between the main board and the connecting shaft of the present invention; Figure 7 It is a schematic diagram of the connection structure between the pressure block and the vertical rod of the present invention; Figure 8 It is a schematic diagram of the connection structure of the connecting shaft and the convex block of the present invention; Fig. 9 It is a schematic structural diagram of the working state of the pressure bearing block of the present invention.

[0017] In the figure: 1. main board; 2. connecting pipe; 3. rotating hole; 4. limiting rod; 5. limiting block; 6. limiting groove; 7. long pin; 8. fixing block; 9. supporting rod; 10. limiting frame; 11. connecting rod; 12. ball bearing; 13. connecting shaft; 14. push rod; 15. slider; 16. slide groove; 17. first spring; 18. push rod; 19. protrusion; 20. groove; 21. pressure block; 22. second spring; 23. vertical rod; 24. overlap block; 25. third spring; 26. bottom plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: In order to enable the staff to better adjust the sagittal growth and better control the vertical height, the limit frame 10 can be rotated by setting a movable structure, such as Figure 1-Figure 4As shown: an intraoral expansion device, including a main board 1, a limit rod 4 is movably arranged inside the main board 1, and the main board 1 is symmetrically distributed about the center of the limit rod 4, and the insides of the left and right main boards 1 are both threadedly connected with long pins 7, a connecting tube 2, the connecting tube 2 is welded to the end of the long pin 7, a fixing block 8, the fixing block 8 is welded to the surface of the main board 1, and the side of the fixing block 8 is welded to a support rod 9, and the support rod 9 is rotatably arranged inside the support rod 9, a limit frame 10, the side of the limit frame 10 is fixedly connected to the connecting rod 11, and a locking assembly is arranged inside the main board 1, including a push rod 14 slidably arranged inside the main board 1, and the push rod 14 corresponds to the limit rod 4 one by one, and a rotating hole 3 is opened on the surface of the connecting tube 2, and the rotating holes 3 are distributed at equal angles on the surface of the connecting tube 2.

[0020] A limiting block 5 is fixedly installed on the surface of the limiting rod 4, and the limiting blocks 5 are symmetrically distributed about the center of the limiting rod 4. A limiting groove 6 corresponding to the limiting blocks 5 is opened inside the main board 1. A ball 12 is rotatably arranged inside the connecting rod 11, and the other side of the ball 12 is rotatably arranged inside the support rod 9.

[0021] When in use, the external long rod component is inserted into the rotating hole 3, and the connecting tube 2 and the long pin 7 can be driven to rotate through the rotating hole 3. When the long pin 7 rotates, under the action of the limit rod 4, the main boards 1 on the left and right sides are driven away from each other, and then the support rod 9 and the limit frame 10 are moved away. At this time, the support rod 9 and the limit frame 10 can well support the inside of the oral cavity, and the limit frame 10 can be rotated inside the support rod 9 through the connecting rod 11 and the ball 12, and then the staff can well adjust the angle of the limit frame 10 so that the limit frame 10 can better cooperate with the teeth, which is convenient for the staff to adjust the sagittal growth and can also well control the vertical height.

[0022] Embodiment 2: Different from Embodiment 1, a locking assembly is provided to keep the mainboard 1 stable during operation. Figure 5-Figure 9 As shown, a connecting shaft 13 is rotatably provided inside the mainboard 1, and a protrusion 19 is slidably provided inside the connecting shaft 13, and the surface of the protrusion 19 initially fits with the inner wall of the mainboard 1, and a groove 20 is opened inside the mainboard 1.

[0023] A pressure block 21 is slidably provided inside the connecting shaft 13, and a vertical rod 23 is welded to the lower surface of the pressure block 21, and a bottom plate 26 is welded to the lower surface of the vertical rod 23, and a push rod 18 is fixedly connected to the lower surface of the connecting shaft 13, and the left and right sides of the bottom plate 26 are inclined, and the surface of the bottom plate 26 fits the surface of the protrusion 19, and a lap block 24 is fixedly connected to the upper surface of the protrusion 19, and a groove 20 corresponding to the protrusion 19 is opened inside the main board 1.

[0024] A third spring 25 that plays an elastic reset role is fixedly installed on the side of the overlap block 24, and the other side of the third spring 25 is fixedly connected to the inner wall of the connecting shaft 13, and the third spring 25 is initially in a compressed state, the push rod 18 corresponds to the push rod 14 one by one, and the upper and lower sides of the push rod 14 are fixedly installed with a slider 15, and the side of the slider 15 is fixedly installed with a first spring 17 that plays an elastic reset role, and the other side of the first spring 17 is fixedly connected to the inner wall of the main board 1, and a slide groove 16 corresponding to the slider 15 is opened inside the main board 1.

[0025] During use, in the initial state, the protrusion 19 is pressed against the inner wall of the main board 1 under the action of the overlap block 24 and the third spring 25. At this time, the friction force on the connecting shaft 13 is relatively large and it will not rotate. After adjusting the position of the support rod 9 through the rotating hole 3, the external long rod can be inserted into the connecting shaft 13 to press the pressure block 21, and then the pressure block 21 drives the vertical rod 23 and the bottom plate 26 to descend (the second spring 22 is squeezed at this time). At this time, the protrusion 19 is moved upward under the action of the overlap block 24 and the third spring 25. The connecting shaft 13 moves in the inner direction. At this time, the protrusion 19 will not press against the inner wall of the mainboard 1, so that the friction between the connecting shaft 13 and the mainboard 1 is small. Then, the connecting shaft 13 can be rotated to make the connecting shaft 13 drive the push rod 18 to rotate. The rotation of the push rod 18 will push the push rod 14 to move the push rod 14 in the direction of the limit rod 4. Finally, the push rod 14 presses against the limit rod 4, so that the friction between the limit rod 4 and the mainboard 1 is large, so that the mainboard 1 will not move. After adjusting the angle, the mainboard 1 will not move, and the stability is high.

[0026] Embodiment 3: Different from Embodiment 2, the push rod 14 can be kept stable when working. Figure 5 and Figure 6 As shown, a second spring 22 having an elastic reset function is fixedly mounted on the lower surface of the pressure block 21 , and the other side of the second spring 22 is fixedly connected to the inner wall of the connecting shaft 13 .

[0027] When the connecting shaft 13 rotates, the protrusion 19 and the groove 20 limit the rotation angle of the connecting shaft 13, thereby improving stability. After the push rod 14 presses against the limit rod 4, the pressure block 21 is released. At this time, the pressure block 21 rises to its original position under the action of the second spring 22, and then the bottom plate 26 pushes the protrusion 19 again, so that the protrusion 19 presses against the inner wall of the main board 1 again. At this time, the connecting shaft 13 will not self-rotate under the action of the friction between the protrusion 19 and the main board 1, thereby ensuring stability. When the push rod 14 moves, the slider 15 will slide inside the slide groove 16, and the slider 15 will squeeze the first spring 17. When it is necessary to return the push rod 14 to its original position, the above operation is repeated, but the connecting shaft 13 can be rotated. At this time, the push rod 14 loses the thrust of the push rod 18, and then the push rod 14 returns to its original position under the action of the slider 15 and the first spring 17, which is convenient for subsequent use.

[0028] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

Claims

1. An intraoral expansion device, comprising a main board (1), wherein a limit rod (4) is movably arranged inside the main board (1), and the main board (1) is symmetrically distributed about the center of the limit rod (4), and long pins (7) are threadedly connected inside the main boards (1) on both sides; It is characterized in that Also includes: A connecting pipe (2), the connecting pipe (2) being welded to the end of the long pin (7); A fixing block (8), the fixing block (8) being welded to the surface of the main board (1), and a support rod (9) being welded to the side of the fixing block (8), and a connecting rod (11) being rotatably arranged inside the support rod (9); A limiting frame (10), the side surface of the limiting frame (10) being fixedly connected to the connecting rod (11); A locking assembly is arranged inside the main board (1), comprising a push rod (14) slidably arranged inside the main board (1), and the push rod (14) corresponds one-to-one to the limiting rod (4).

2. The intraoral expansion device according to claim 1, characterized in that: The surface of the connecting pipe (2) is provided with rotation holes (3), and the rotation holes (3) are distributed at equal angles on the surface of the connecting pipe (2).

3. The intraoral expansion device according to claim 1, characterized in that: A limiting block (5) is fixedly mounted on the surface of the limiting rod (4), and the limiting blocks (5) are symmetrically distributed about the center of the limiting rod (4). Limiting grooves (6) corresponding to the limiting blocks (5) are provided inside the main board (1).

4. The intraoral expansion device according to claim 1, characterized in that: A ball (12) is rotatably arranged inside the connecting rod (11), and the other side of the ball (12) is rotatably arranged inside the supporting rod (9).

5. The intraoral expansion device according to claim 1, characterized in that: The main board (1) is provided with a connecting shaft (13) for rotation inside, and a protrusion (19) is provided for sliding inside the connecting shaft (13), and the surface of the protrusion (19) is initially in contact with the inner wall of the main board (1), and a groove (20) is provided inside the main board (1).

6. The intraoral expansion device according to claim 5, characterized in that: A pressure block (21) is slidably disposed inside the connecting shaft (13), a vertical rod (23) is welded to the lower surface of the pressure block (21), a bottom plate (26) is welded to the lower surface of the vertical rod (23), and a push rod (18) is fixedly connected to the lower surface of the connecting shaft (13).

7. The intraoral expansion device according to claim 6, characterized in that: The left and right sides of the bottom plate (26) are both inclined, and the surface of the bottom plate (26) fits the surface of the protrusion (19), and the upper surface of the protrusion (19) is fixedly connected to a lap block (24), and a groove (20) corresponding to the protrusion (19) is provided inside the main plate (1).

8. The intraoral expansion device according to claim 7, characterized in that: A third spring (25) having an elastic reset function is fixedly mounted on the side of the overlap block (24), and the other side of the third spring (25) is fixedly connected to the inner wall of the connecting shaft (13), and the third spring (25) is initially in a compressed state.

9. The intraoral expansion device according to claim 6, characterized in that: The push rod (18) corresponds to the push rod (14) one by one, and the push rod (14) is fixedly mounted with a slider (15) on both the upper and lower sides, and a first spring (17) having an elastic reset function is fixedly mounted on the side of the slider (15), and the other side of the first spring (17) is fixedly connected to the inner wall of the main board (1), and a slide groove (16) corresponding to the slider (15) is provided inside the main board (1).

10. The intraoral expansion device according to claim 6, characterized in that: A second spring (22) having an elastic return function is fixedly mounted on the lower surface of the pressure block (21), and the other side of the second spring (22) is fixedly connected to the inner wall of the connecting shaft (13).

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