Sliding lock cover, tooth orthodontic self-ligating bracket and tooth orthodontic appliance thereof

Abstract

The embodiment of the utility model discloses a sliding lock cover, a tooth orthodontic self-ligating bracket and a tooth orthodontic appliance thereof. The sliding lock cover comprises a cover body, guide sliding rails are arranged on the two opposite sides of the cover body, the cover body comprises a first surface, a concave part is formed in the first surface, a limiting protrusion is arranged at the bottom of the concave part, and the concave part is divided into a locking part and an unlocking part in the length direction of the guide sliding rails through the limiting protrusion. The side wall, relatively away from the locking part, of the unlocking part is provided with a sliding-in opening communicating with the concave part, the top of the sliding-in opening penetrates through the first surface, and the distance between at least part of the bottom face of the sliding-in opening and the first surface is gradually reduced in the length direction of the guide sliding rail. According to the embodiment, after the sliding lock cover is assembled, it can be guaranteed that the elastic shaft can easily enter from the sliding inlet, and the elastic shaft is prevented from being disengaged from the unlocking part.

Description

Technical Field

[0001] The present disclosure relates to the field of orthodontic brackets, and particularly to a sliding lock cover, a self-locking orthodontic bracket for teeth, and an orthodontic appliance for teeth. Background Art

[0002] Tooth orthodontics is to correct teeth, relieve malocclusions and deformities. With the improvement of people's living standards, the demand for tooth orthodontics is becoming stronger and stronger. During tooth orthodontics, an orthodontic bracket is fixed on the tooth surface, and then an arch wire is passed through the arch wire groove of the orthodontic bracket to confine the arch wire within the arch wire groove. The corrective force of the arch wire is transmitted to the teeth through the orthodontic bracket, enabling the teeth to move as expected to achieve tooth correction.

[0003] Currently, orthodontic brackets include self-locking brackets and ligature brackets. The self-locking bracket is provided with a shaft hole, a shaft wire and a sliding lock cover on the bracket body. The sliding lock cover is slidably connected to the bracket body. The shaft wire is inserted into the shaft hole, and the shaft wire and the lock cover cooperate to cover the arch wire groove to confine the arch wire within the arch wire groove. The self-locking brackets in the related art also have problems such as unreliable locking due to the falling off of the shaft wire and unreliable locking of the sliding lock cover, which reduces the reliability of the orthodontic bracket. Summary of the Utility Model

[0004] The present disclosure provides a sliding lock cover, a self-locking orthodontic bracket for teeth, and an orthodontic appliance for teeth with reliable performance and convenient manufacturing, which are realized through the following technical solutions:

[0005] The present disclosure provides a sliding lock cover, including: a cover body, guiding slide rails are arranged on opposite sides of the cover body. The cover body includes a first surface, a recessed portion is formed on the first surface, a limiting protrusion is arranged at the bottom of the recessed portion, and the limiting protrusion divides the recessed portion along the length direction of the guiding slide rail to form a locking portion and an unlocking portion. A sliding inlet communicating with the recessed portion is formed on the side wall of the unlocking portion relatively far from the locking portion. The top of the sliding inlet penetrates the first surface, and at least part of the bottom surface of the sliding inlet is gradually reduced in the length direction of the guiding slide rail relative to the distance of the first surface.

[0006] Further, the bottom surface of the sliding inlet forms a preset target angle relative to the first surface, and the preset target angle is set to be an acute angle.

[0007] Further, the range of the preset target angle is 10° - 45°.

[0008] Further, one end of the limiting protrusion is connected to one side wall of the recessed portion, and the other end of the limiting protrusion is spaced from the other side wall of the recessed portion to form a channel between the locking portion and the unlocking portion. The height of the limiting protrusion is less than or equal to the depth of the recessed portion; or,

[0009] Both ends of the limiting protrusion are connected to two opposite side walls of the recessed portion, and the height of the limiting protrusion is less than the depth of the recessed portion. A channel located between the locking portion and the unlocking portion is formed between the top surface of the limiting protrusion and the first surface; or,

[0010] Both ends of the limiting protrusion are not connected to the side walls of the recessed portion, and the height of the limiting protrusion is less than or equal to the depth of the recessed portion. Two channels located between the locking portion and the unlocking portion are formed between the limiting protrusion and the side walls of the recessed portion.

[0011] Further, the cover body further includes a second surface disposed opposite to the first surface, and an identifier is provided on the second surface.

[0012] The present disclosure provides an orthodontic self-locking bracket for teeth, including: a base plate, a bracket body, a sliding lock cover according to any disclosed embodiment of the present disclosure, and an elastic shaft; the bracket body is integrally formed with the base plate, an arch wire groove and a sliding groove are provided on the bracket body, the arch wire groove and the sliding groove intersect, a blind hole is provided on the bottom surface of the sliding groove, the sliding lock cover is slidably matched with the sliding groove, the sliding lock cover has an unlocking state of opening the arch wire groove and a locking state of covering the arch wire groove, one end of the elastic shaft is located in the blind hole, and the other end of the elastic shaft is inserted into the recessed portion. The sliding lock cover slides along the sliding groove to enable the elastic shaft to enter the recessed portion from the sliding inlet. When the elastic shaft is located in the locking portion, the sliding lock cover is in the locking state, and when the elastic shaft is located in the unlocking portion, the sliding lock cover is in the unlocking state.

[0013] Further, the material of the elastic shaft includes nickel-titanium wire; and / or, the surface of the base plate adapted to fit the lingual side of the tooth is a mesh surface.

[0014] Further, the bracket body is divided into an upper wing portion and a lower wing portion via the arch wire groove, the sliding groove is located in the upper wing portion. In the locking state, the sliding lock cover abuts against the lower wing portion. A first groove is provided at the position where the lower wing portion abuts against the sliding lock cover, and a second groove is provided on the sliding lock cover. When the sliding lock cover abuts against the lower wing portion, the first groove and the second groove cooperate to form an unlocking space. A convex block is provided on the side of the sliding lock cover facing away from the first surface, and the convex block is located above the second groove.

[0015] The present disclosure further provides an orthodontic appliance, including an arch wire and the orthodontic self-locking bracket according to any one of the embodiments of the present disclosure. At least two orthodontic self-locking brackets are provided, and the arch wire is adapted to be disposed in the arch wire grooves of at least two orthodontic self-locking brackets.

[0016] Such a design has the following advantages: The sliding lock cover of the embodiment of the present disclosure can ensure that the elastic shaft can easily enter from the sliding inlet after the sliding lock cover is assembled and prevent the elastic shaft from disengaging from the unlocking part. Description of the Drawings

[0017] Figure 1a Structural schematic diagram of the sliding lock cover of Embodiment 1 of the present disclosure;

[0018] Figure 1b Structural schematic diagram of the sliding lock cover of Embodiment 1 of the present disclosure;

[0019] Figure 1c Planar schematic diagram of the sliding lock cover of Embodiment 1 of the present disclosure;

[0020] Figure 1d Cross-sectional schematic diagram of the sliding lock cover of Embodiment 1 of the present disclosure;

[0021] Figure 2a Structural schematic diagram of the sliding lock cover of Embodiment 2 of the present disclosure;

[0022] Figure 2b Planar schematic diagram of the sliding lock cover of Embodiment 2 of the present disclosure;

[0023] Figure 2c Cross-sectional schematic diagram of the sliding lock cover of Embodiment 2 of the present disclosure;

[0024] Figure 3a Structural schematic diagram of the sliding lock cover of Embodiment 3 of the present disclosure;

[0025] Figure 3b Planar schematic diagram of the sliding lock cover of Embodiment 3 of the present disclosure;

[0026] Figure 3c Cross-sectional schematic diagram of the sliding lock cover of Embodiment 2 of the present disclosure;

[0027] Figure 4a Overall structural schematic diagram of the self-locking bracket for orthodontics of the embodiment of the present disclosure;

[0028] Figure 4b Partial structural schematic diagram of the self-locking bracket for orthodontics of the embodiment of the present disclosure;

[0029] Figure 4c Partial structural schematic diagram of the self-locking bracket for orthodontics of the embodiment of the present disclosure.

[0030] Meanings of the reference numerals in the drawings:

[0031] 10. Sliding lock cover; 20. Base plate; 30. Bracket body; 40. Elastic shaft; 2. Arch wire.

[0032] 11. Cover body; 12. Guide slide rail; 11a. First surface; 11b. Second surface; 13. Recessed part; 14. Limit protrusion; 15. Slide-in port; 131. Locking part; 132. Unlocking part; 16. Mark; 17. Second groove; 18. Bump;

[0033] 31. Arch wire groove; 32. Slide groove; 33. Blind hole; 34. Upper wing part; 35. Lower wing part; 36. First groove. Specific embodiments

[0034] The following further elaborates on the content of the present disclosure in conjunction with the accompanying drawings and specific embodiments.

[0035] Orthodontics mainly involves fixing orthodontic brackets on the tooth surface, threading an arch wire through the arch wire groove on the orthodontic bracket, restricting the arch wire within the arch wire groove, and transmitting the corrective force of the arch wire to the teeth through the orthodontic bracket, enabling the teeth to achieve the expected movement to realize tooth correction.

[0036] In related technologies, orthodontic brackets include self-locking brackets. The self-locking bracket includes a base plate and a bracket body. The base plate is adapted to be fixed on the tooth surface, and the bracket body is fixed on the base plate. The bracket body is provided with an arch wire groove for placing the arch wire, and the arch wire groove faces the oral cavity. The bracket body is provided with a lock cover for closing the opening. After the arch wire is placed in the arch wire groove, the lock cover closes the arch wire groove, thereby reducing the probability of the arch wire disengaging from the arch wire groove.

[0037] Exemplarily, in order to achieve the positioning of the lock cover in the open and closed states, an elastic shaft is further provided on the bracket body, and a functional groove cooperating with the elastic shaft is provided on the lock cover. The functional groove penetrates through the lock cover, and the elastic shaft cooperates with the functional groove to fix the lock cover. The opening and closing stability of the self-locking bracket directly affects the user experience of the product. The main factors affecting the opening and closing stability of the self-locking bracket include the rationality of the structure itself, the matching degree between the lock cover and the slide groove, the matching degree between the elastic shaft and the lock cover, the experience and proficiency of the assembly personnel. There are also problems in the cooperation between the elastic shaft and the functional groove in related technologies, such as the elastic shaft falling off, resulting in unreliable locking, unreliable locking of the lock cover, and reducing the reliability of the orthodontic bracket.

[0038] To solve the problem of unreliable locking of the lock cover of the orthodontic self-locking bracket in related technologies, the embodiments of the present disclosure provide a sliding lock cover. The following elaborates on the technical solution of the sliding lock cover in conjunction with the accompanying drawings.

[0039] Figure 1a It is a schematic structural diagram of the sliding lock cover according to Embodiment 1 of the present disclosure. Figure 1b It is a schematic structural diagram of the sliding lock cover according to Embodiment 1 of the present disclosure. Figure 1c It is a planar schematic diagram of the sliding lock cover according to Embodiment 1 of the present disclosure. Figure 1d It is a cross-sectional schematic diagram of the sliding lock cover according to Embodiment 1 of the present disclosure.Figure 2a Structural schematic diagram of the sliding lock cover according to the second embodiment of the present disclosure Figure 2b Planar schematic diagram of the sliding lock cover according to the second embodiment of the present disclosure Figure 2c Cross-sectional schematic diagram of the sliding lock cover according to the second embodiment of the present disclosure Figure 3a Structural schematic diagram of the sliding lock cover according to the third embodiment of the present disclosure Figure 3b Planar schematic diagram of the sliding lock cover according to the third embodiment of the present disclosure Figure 3c Cross-sectional schematic diagram of the sliding lock cover according to the second embodiment of the present disclosure

[0040] Referring to Figures 1a - 1d , Figures 2a - 2c , Figures 3a - 3c As shown, the present disclosure provides a sliding lock cover. The sliding lock cover 10 may specifically include a cover body 11, and guiding slide rails 12 are arranged on opposite sides of the cover body 11. The cover body 11 includes a first surface 11a, a recess 13 is formed on the first surface 11a, a limiting protrusion 14 is arranged at the bottom of the recess 13, and the limiting protrusion 14 divides the recess 13 along the length direction of the guiding slide rail 12 to form a locking part 131 and an unlocking part 132. A sliding inlet 15 communicating with the recess 13 is formed on the side wall of the unlocking part 132 relatively far from the locking part 131. The top of the sliding inlet 15 penetrates through the first surface 11a, and at least part of the bottom surface 151 of the sliding inlet 15 gradually decreases in distance relative to the first surface 11a in the length direction of the guiding slide rail 12.

[0041] It should be noted that at least part of the bottom surface 151 of the sliding inlet 15 gradually decreases in distance relative to the first surface 11a in the length direction of the guiding slide rail 12. It can be understood that the distance between the bottom surface 151 of the sliding inlet 15 and the first surface 11a is the depth dimension of the sliding inlet 15. At least part of the bottom surface of the sliding inlet 15 gradually decreases in distance relative to the first surface 11a in the length direction of the guiding slide rail 12, which may be that the distance between the bottom surface of the sliding inlet 15 and the first surface 11a gradually decreases in the length direction of the guiding slide rail 12. That is to say, the bottom surface of the sliding inlet 15 is an inclined plane as a whole, or the bottom surface of the sliding inlet 15 may also be partially flat and partially inclined, or the bottom surface of the sliding inlet 15 may also be an arc-shaped surface. The specific shape of the bottom surface of the sliding inlet 15 is not limited herein, as long as it meets the requirement that at least part of the bottom surface of the sliding inlet 15 gradually decreases in distance relative to the first surface 11a in the length direction of the guiding slide rail 12.

[0042] It should be noted that the shape of the cover body 11 may be rectangular, circular or other shapes, and the shape and material of the cover body 11 may be set according to actual use requirements.

[0043] Exemplarily, the shape of the cover body 11 is rectangular, the guiding slide rail 12 is arranged along the length direction of the cover body 11, the thickness dimension of the guiding slide rail 12 is smaller than the thickness dimension of the cover body 11, and the guiding slide rail 12 is adapted to cooperate with the chute of the orthodontic self-locking bracket for teeth.

[0044] Exemplarily, the first surface 11a is the bottom surface of the cover body 11 for assembling with the orthodontic self-locking bracket for teeth. The recessed portion 13 is formed on the first surface 11a, and the recessed portion 13 does not penetrate through the opposite surfaces of the cover body 11. The shape of the recessed portion 13 can be rectangular, circular or other shapes, and the specific shape of the recessed portion 13 is not limited herein.

[0045] In one embodiment, the limiting protrusion 14 protrudes relative to the bottom of the recessed portion 13. The limiting protrusion 14 divides the recessed portion 13 along the length direction of the guiding slide rail 12 (i.e., the sliding direction of the sliding lock cover 10) to form a locking portion 131 and an unlocking portion 132. The limiting protrusion 14 can be plate-shaped or rod-shaped, and the specific structure and size of the limiting protrusion are not limited herein.

[0046] In one embodiment, the sliding inlet 15 is arranged on the side wall of the unlocking portion 132 relatively far from the locking portion 131, and the sliding inlet 15 communicates with the recessed portion 13. The top of the sliding inlet 15 penetrates through the first surface 11a, and the distance between at least part of the bottom surface of the sliding inlet 15 and the first surface 11a gradually decreases in the length direction of the guiding slide rail 12. With such a setting, the force required for the elastic shaft to slide into the sliding inlet 15 is smaller, and the bottom surface of the sliding inlet 15 can cooperate with the limiting protrusion 14 to enable the elastic shaft to be clamped in the unlocking portion 132, avoiding the elastic shaft from coming out and improving the locking reliability of the sliding lock cover.

[0047] The embodiment of the present disclosure provides a sliding lock cover. The sliding lock cover 10 includes a cover body 11. Guiding slide rails 12 are arranged on opposite sides of the cover body 11. The cover body 11 includes a first surface 11a. A recessed portion 13 is formed on the first surface 11a. A limiting protrusion 14 is arranged at the bottom of the recessed portion 13. The limiting protrusion 14 divides the recessed portion 13 along the length direction of the guiding slide rail 12 to form a locking portion 131 and an unlocking portion 132. A sliding inlet 15 communicating with the recessed portion 13 is formed on the side wall of the unlocking portion 132 relatively far from the locking portion 131. The top of the sliding inlet 15 penetrates through the first surface 11a, and the distance between at least part of the bottom surface of the sliding inlet 15 and the first surface 11a gradually decreases in the length direction of the guiding slide rail 12. With such a setting, when the sliding lock cover is assembled with the elastic shaft, the elastic shaft slides into the sliding inlet 15 with a smaller force, which is convenient and fast. Moreover, the bottom surface of the sliding inlet 15 can cooperate with the limiting protrusion 14 to enable the elastic shaft to be clamped in the unlocking portion 132, avoiding the elastic shaft from coming out and improving the locking reliability of the sliding lock cover.

[0048] In one embodiment, the bottom surface of the sliding inlet 15 forms a preset target angle relative to the first surface 11a, and the preset target angle 11a is set as an acute angle. By setting the inclination angle of the bottom surface of the sliding inlet 15 relative to the first surface 11a within the preset target angle range, the elastic shaft can enter from the sliding inlet 15 under a relatively small acting force and be limited and engaged in the unlocking portion 132 without coming out.

[0049] Exemplarily, the range of the preset target angle is 10° - 45°. For example, the range of the preset target angle can be 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°. It should be noted that the specific value of the preset target angle is not limited herein and can be set according to actual usage requirements.

[0050] In one disclosed embodiment, referring to Figures 3a to 3c as shown, Figure 3c it can be Figure 3a a schematic C-C cross-sectional view of. One end of the limiting protrusion 14 is connected to one side wall of the recess 13, and the other end of the limiting protrusion 14 is spaced from the other side wall of the recess 13 to form a channel between the locking portion 131 and the unlocking portion 132. The height of the limiting protrusion 14 is less than or equal to the depth of the recess 13.

[0051] Exemplarily, when the recess 13 is rectangular, the limiting protrusion 14 is located at the middle position of the recess 13, and the limiting protrusion 14 divides the recess 13 into an E shape. The limiting protrusion 14 can be connected to the left side wall or the right side wall of the recess 13.

[0052] It should be noted that the height of the limiting protrusion 14 is less than or equal to the depth of the recess 13, the height of the limiting protrusion 14 is equal to the depth of the recess 13, or the height of the limiting protrusion 14 is less than the depth of the recess 13. The height of the limiting protrusion 14 is the dimension of the limiting protrusion relative to the bottom surface of the recess 13. The specific dimension of the height of the limiting protrusion 14 is not limited herein.

[0053] In one disclosed embodiment, referring to Figures 2a to 2c as shown, Figure 2c it can be Figure 2a a schematic B-B cross-sectional view of. Both ends of the limiting protrusion 14 are connected to two opposite side walls of the recess 13, and the height of the limiting protrusion 14 is less than the depth of the recess 13. A channel between the locking portion 131 and the unlocking portion 132 is formed between the top surface of the limiting protrusion 14 and the first surface 11a.

[0054] Exemplarily, when the recess 13 is rectangular, the limiting protrusion 14 is located at the middle position of the recess 13, and the limiting protrusion 14 can be connected to the left side wall and the right side wall of the recess 13. The recess 13 is integrally arranged in a shape like a Chinese character 'Ri' (day character).

[0055] The height of the limiting protrusion 14 in the embodiment of the present disclosure is less than the depth of the recessed portion 13, so that a channel located between the locking portion 131 and the unlocking portion 132 is formed between the top surface of the limiting protrusion 14 and the first surface, and the elastic shaft can move between the locking portion 131 and the unlocking portion 132 through the channel.

[0056] Exemplarily, the limiting protrusion 14 can be an arc-shaped protrusion, and the specific dimensions and shape of the limiting protrusion 14 are not limited herein and can be set according to actual usage requirements.

[0057] In one embodiment of the disclosure, refer to Figures 1a to 1d as shown in Figure 1d It can be Figure 1c a schematic A-A cross-sectional view of. The two ends of the limiting protrusion 14 are not connected to the side walls of the recessed portion 13, and the height of the limiting protrusion 14 is less than or equal to the depth of the recessed portion 13. Two channels located between the locking portion 131 and the unlocking portion 132 are formed between the limiting protrusion 14 and the side walls of the recessed portion 13.

[0058] Exemplarily, when the recessed portion 13 is rectangular, the limiting protrusion 14 is located at the middle position of the recessed portion 13. The limiting protrusion 14 can be a columnar shape protruding relative to the bottom surface of the recessed portion 13. The limiting protrusion 14 is spaced apart from the left side wall and the right side wall of the recessed portion 13 by a certain distance. For example, the limiting protrusion 14 is spaced apart from the left side wall and the right side wall of the recessed portion 13 by an equal distance, so that the elastic shaft can enter the locking portion 131 and the unlocking portion 132 from both sides. The recessed portion 13 is integrally arranged in a zigzag shape.

[0059] Exemplarily, the cover body 11 further includes a second surface 11b opposite to the first surface 11a, and a mark 16 is provided on the second surface 11b. The mark 16 can be a tooth position number corresponding to the placement position of the orthodontic self-locking bracket for teeth. Such a setting facilitates the doctor to identify and locate.

[0060] Figure 4a is a schematic diagram of the overall structure of the orthodontic self-locking bracket for teeth in the embodiment of the present disclosure; Figure 4b is a schematic diagram of a partial structure of the orthodontic self-locking bracket for teeth in the embodiment of the present disclosure, Figure 4c is a schematic diagram of a partial structure of the orthodontic self-locking bracket for teeth in the embodiment of the present disclosure. Refer to Figures 4a to 4c as shown in

[0061] Specifically, the bracket body 30 and the base plate 20 are integrally formed. The bracket body 30 is provided with an arch wire groove 31 and a sliding groove 32, and the arch wire groove 31 and the sliding groove 32 intersect. The arch wire groove 31 is used for placing an orthodontic arch wire. A blind hole 33 is formed in the bottom surface of the sliding groove 32. The sliding lock cover 10 is slidably engaged with the sliding groove 32. The sliding lock cover 10 has an unlocking state for opening the arch wire groove 31 and a locking state for covering the arch wire groove 31. One end of the elastic shaft 40 is located in the blind hole 33, and the other end of the elastic shaft 40 is inserted into the recess 13. The sliding lock cover 10 slides along the sliding groove 32 to make the elastic shaft 40 enter the recess 13 from the sliding inlet 15. When the elastic shaft 40 is located at the locking portion 131, the sliding lock cover 10 is in the locking state. When the elastic shaft 40 is located at the unlocking portion 132, the sliding lock cover 10 is in the unlocking state.

[0062] Exemplarily, the material of the elastic shaft 40 includes nickel-titanium wire. For example, the elastic shaft 40 can be a nickel-titanium shaft wire with certain elasticity. After the elastic shaft 40 is inserted into the blind hole 33, one end of the elastic shaft 40 abuts against the bottom surface of the blind hole 33. When the end of the elastic shaft 40 away from the blind hole 33 enters the locking portion 131, the sliding lock cover 10 is in the locking state. When the end of the elastic shaft 40 away from the blind hole 33 crosses the limit protrusion 14 and reaches the unlocking portion 132 and abuts against the side wall of the sliding inlet 14 and the sliding inlet, it prevents the sliding lock cover from disengaging from the sliding groove 32.

[0063] In the orthodontic self-locking bracket of the embodiment of the present disclosure, the bracket body 30 and the base plate 20 are integrally formed. The arch wire groove 31 and the sliding groove 32 on the bracket body 30 intersect. The arch wire groove 31 is used for placing an orthodontic arch wire. A blind hole 33 is formed in the bottom surface of the sliding groove 32. The sliding lock cover 10 is slidably engaged with the sliding groove 32. The sliding lock cover 10 has an unlocking state for opening the arch wire groove 31 and a locking state for covering the arch wire groove 31. One end of the elastic shaft 40 is located in the blind hole 33, and the other end of the elastic shaft 40 is inserted into the recess 13. The sliding lock cover 10 slides along the sliding groove 32 to make the elastic shaft 40 enter the recess 13 from the sliding inlet 15. When the elastic shaft 40 is located at the locking portion 131, the sliding lock cover 10 is in the locking state. When the elastic shaft 40 is located at the unlocking portion 132, the sliding lock cover 10 is in the unlocking state. With such a setting, the force required for the elastic shaft to slide into the sliding inlet 15 is small, and the bottom surface of the sliding inlet 15 can cooperate with the limit protrusion 14 to enable the elastic shaft to be engaged in the unlocking portion 132, preventing the elastic shaft from disengaging and improving the locking reliability of the sliding lock cover.

[0064] In the related art, orthodontic self-ligating brackets can also be divided into standard brackets and personalized brackets according to different preparation methods. Among them, the assembly method of standard brackets is welding the main body and the base plate, which is convenient for positioning and assembly line production. For personalized brackets, the base plate needs to be customized. If the main body and the base plate are welded, the process difficulty will increase and the accuracy cannot be guaranteed. Therefore, the main body and the base plate are usually integrally formed, and then the elastic shaft is welded through the base plate through holes or the elastic shaft is directly welded on the base plate. However, the base plate perforation welding is easy to affect the bottom of the bracket mesh, resulting in unstable fit between the base plate and the teeth. If the elastic shaft is directly welded to the base plate, there is also a risk of affecting the performance of the bracket due to the high temperature generated by welding. Moreover, both of the above methods can only be functionally tested after welding is completed. If the test is not appropriate, the entire bracket will be scrapped, which greatly increases the production cost. Compared with the related art in which the elastic shaft 40 is assembled with the axial hole set as a through hole, the orthodontic self-ligating bracket of the disclosed embodiment is assembled in the blind hole 33. When assembling the bracket, one end of the elastic shaft 40 does not need to be welded, which may cause the elastic shaft 40 to be damaged and fail due to high temperature. Compared with the related art in which the elastic shaft 40 is placed in the through hole and then the bracket body and the base plate are spot welded or the axial wire is directly spot welded, the orthodontic self-ligating bracket of the disclosed embodiment is easy to assemble, the sliding locking cover is not easy to fall off, and the structure is more compact.

[0065] Exemplarily, the surface of the bottom plate 20 that is suitable for fitting with the lingual side of the tooth is a mesh surface. Such a setting can further strengthen the bonding force between the orthodontic self-ligating bracket and the tooth surface.

[0066] In one embodiment, the bracket body 30 is divided into an upper wing portion 34 and a lower wing portion 35 via the archwire groove 31, and the slide groove 32 is located at the upper wing portion 34. In the locked state, the sliding lock cover 10 abuts against the lower wing portion 35, and a first groove 36 is provided at the abutting position of the lower wing portion 35 and the sliding lock cover 10, and a second groove 17 is provided on the sliding lock cover 10. When the sliding lock cover 10 abuts against the lower wing portion 35, the first groove 36 and the second groove 17 cooperate to form an unlocking space, and a protrusion 18 is provided on the side of the sliding lock cover 10 away from the first surface 11a, and the protrusion 18 is located above the second groove 17.

[0067] For example, the slide grooves 32 are distributed on both sides of the blind hole 33, and match the guide rails on both sides of the sliding lock cover. When the sliding lock cover 10 is closed, the second groove 17 of the sliding lock cover 10 matches the first groove 36 of the bracket body 30. With such a configuration, when the sliding lock cover is opened, the sliding lock cover 10 can be opened by prying the probe against the space formed by the second groove 17 at the lower end of the sliding lock cover and the first groove 36 on the bracket body 30, and applying a slight force to the probe, thereby improving the convenience of opening and closing the sliding lock cover.

[0068] Exemplarily, a projection 18 is also provided below the sliding lock cover 10, when a probe is used to open the sliding lock cover 10. With such a setting, the projection 18 increases the moment of force of the contact point between the probe and the sliding lock cover 10, thereby the sliding lock cover 10 can be opened upwards with less force.

[0069] When assembling the orthodontic self-ligating bracket of the disclosed embodiment, one end of the elastic shaft is inserted into the blind hole and placed into the sliding lock cover 10, and the other end of the elastic shaft enters the recessed portion of the sliding lock cover 10 along the sliding entrance 15 on the sliding lock cover 10, and the elastic shaft 40 first enters the unlocking portion. At this time, the self-ligating bracket is in an unlocking state, and the elastic shaft 40 just contacts the limiting protrusion in the sliding lock cover 10. When the self-ligating bracket is in an unlocking state, the elastic shaft 40 passes the limiting protrusion from the unlocking portion to the locking portion and contacts it, thereby preventing the sliding lock cover 10 from loosening. A probe is used to gently pry at the first groove 36 and the second groove 17 to make the guide rail of the sliding lock cover 10 slide upward along the slide groove, and the elastic shaft 40 slides from the locking part to the unlocking part through the limiting protrusion. Under the restriction of the limiting protrusion and the inclined surface of the bottom surface of the sliding entrance of the sliding lock cover, the sliding lock cover 10 is fixed without shaking, and the sliding lock cover can be kept from falling out, and the sliding lock cover 10 is in an open state, thereby realizing the opening and closing function of the archwire slot.

[0070] The present disclosure also provides an orthodontic appliance, comprising an archwire 2 and an orthodontic self-ligating bracket of any one of the embodiments of the present disclosure, wherein there are at least two orthodontic self-ligating brackets, and the archwire 2 is used to be arranged in the archwire grooves of at least two orthodontic self-ligating brackets.

[0071] The orthodontic appliance is used for tooth correction. The orthodontic appliance is fixed on the teeth through the base plate 20, and an orthodontic self-locking bracket is fixed on at least two teeth as needed. Then the sliding lock cover is moved to the open state, and the archwire can be placed in the archwire groove. The sliding lock cover can effectively prevent the sliding lock cover from falling out through the structural setting of the sliding entrance 15 and the cooperation of the limiting protrusion, and prevent the archwire placed in the archwire groove from falling out of the archwire groove.

[0072] A method for preparing a tooth orthodontic self-ligating bracket comprises the following steps:

[0073] S1. The base plate 20 and the bracket body 30 are manufactured by an integrated molding process, wherein the bracket body 30 is provided with an archwire groove 31 and a slide groove 32 , the archwire groove 31 and the slide groove 32 are arranged to intersect, and a blind hole 33 is opened on the bottom surface of the slide groove 32 .

[0074] S2. Prepare and form a sliding lock cover 10. The sliding lock cover 10 includes a cover body 11. Guide rails 12 are arranged on opposite sides of the cover body 11. The cover body 11 includes a first surface 11a. A recess 13 is formed on the first surface 11a. A limiting protrusion 14 is arranged at the bottom of the recess 13. The limiting protrusion 14 divides the recess 13 along the length direction of the guide rail 12 to form a locking part 131 and an unlocking part 132. A sliding inlet 15 communicating with the recess 13 is formed in the side wall of the unlocking part 132 relatively far away from the locking part 131. The top of the sliding inlet 15 penetrates the first surface 11a. At least part of the bottom surface of the sliding inlet 15 gradually decreases in distance from the first surface 11a in the length direction of the guide rail 12.

[0075] S3. Place one end of the elastic shaft 40 into the blind hole 33, and slide the sliding lock cover 10 along the chute 32 of the bracket body 30, so that the other end of the elastic shaft 40 slides into the recess 13 from the sliding inlet 15 and slides from the unlocking part 132 into the locking part 131.

[0076] The above detailed description is a specific description of the feasible embodiments of the present disclosure. This embodiment is not intended to limit the protection scope of the present disclosure. Any equivalent implementation or change without departing from the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A sliding lock cover, characterized in that: include: A cover body, wherein guide rails are arranged on opposite sides of the cover body, the cover body comprises a first surface, a recessed portion is formed on the first surface, a limiting protrusion is arranged at the bottom of the recessed portion, the limiting protrusion separates the recessed portion along the length direction of the guide rail to form a locking portion and an unlocking portion, a side wall of the unlocking portion relatively away from the locking portion is provided with a sliding entrance communicating with the recessed portion, and a top of the sliding entrance passes through the first surface; Wherein, the distance between at least a portion of the bottom surface of the sliding entrance and the first surface gradually decreases in the length direction of the guide rail.

2. The sliding lock cover according to claim 1, characterized in that: The bottom surface of the sliding entrance forms a preset target angle relative to the first surface, and the preset target angle is set at an acute angle.

3. The sliding lock cover according to claim 2, characterized in that: The preset target angle ranges from 10° to 45°.

4. The sliding lock cover according to any one of claims 1 to 3, characterized in that: One end of the limiting protrusion is connected to a side wall of the recessed portion, and the other end of the limiting protrusion is spaced from the other side wall of the recessed portion to form a channel between the locking portion and the unlocking portion, and the height of the limiting protrusion is less than or equal to the depth of the recessed portion; or The two ends of the limiting protrusion are connected to the two opposite side walls of the recessed portion, and the height of the limiting protrusion is less than the depth of the recessed portion, and a channel located between the locking portion and the unlocking portion is formed between the top surface of the limiting protrusion and the first surface; or, The two ends of the limiting protrusion are not connected to the side walls of the recessed portion, and the height of the limiting protrusion is less than or equal to the depth of the recessed portion. The limiting protrusion and the side walls of the recessed portion form two channels between the locking portion and the unlocking portion.

5. The sliding lock cover according to any one of claims 1 to 3, characterized in that: The cover body further includes a second surface arranged opposite to the first surface, and the second surface is provided with a mark.

6. Orthodontic self-ligating bracket, characterized in that: include: Base plate; The bracket body is integrally formed with the base plate, and an archwire groove and a slide groove are arranged on the bracket body. The archwire groove and the slide groove are arranged to intersect, and a blind hole is opened on the bottom surface of the slide groove; The sliding lock cover according to any one of claims 1 to 5, wherein the sliding lock cover and the slide groove are slidably matched, and the sliding lock cover has an unlocked state for opening the archwire groove and a locked state for covering the archwire groove; as well as An elastic shaft, one end of the elastic shaft is located in the blind hole, and the other end of the elastic shaft is inserted into the recessed portion, the sliding lock cover slides along the slide groove to make the elastic shaft enter the recessed portion from the sliding entrance, when the elastic shaft is located in the locking portion, the sliding lock cover is in a locked state, and when the elastic shaft is located in the unlocking portion, the sliding lock cover is in an unlocked state.

7. The orthodontic self-ligating bracket according to claim 6, characterized in that: The material of the elastic shaft includes nickel-titanium wire; and / or the surface of the base plate suitable for fitting with the lingual side of the teeth is a mesh surface.

8. The orthodontic self-ligating bracket according to claim 6, characterized in that: The bracket body is divided into an upper wing and a lower wing via the archwire groove, the slide groove is located at the upper wing, and in a locked state, the sliding lock cover abuts against the lower wing, a first groove is provided at the abutting position between the lower wing and the sliding lock cover, and a second groove is provided on the sliding lock cover. When the sliding lock cover abuts against the lower wing, the first groove and the second groove cooperate to form an unlocking space, and a protrusion is provided on the side of the sliding lock cover away from the first surface, and the protrusion is located above the second groove.

9. A dental orthodontic appliance, characterized in that: It comprises an archwire and the orthodontic self-ligating bracket according to any one of claims 6 to 8, wherein there are at least two orthodontic self-ligating brackets, and the archwire is used to be arranged in the archwire grooves of at least two of the orthodontic self-ligating brackets.

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