Accessory assembly and shell-shaped dental instrument

Abstract

The invention provides an accessory assembly and a shell-shaped dental instrument. The accessory assembly comprises an accessory and an accessory installation base used for installing the accessory, the accessory installation base is provided with at least two installation openings in the circumferential direction, the accessory is detachably and fixedly installed on any installation opening, and the accessory installation base is provided with a limiting part. And the limiting part is used for limiting the accessory to move along the radial direction and the axial direction. The invention has the beneficial effects that the accessory can be selectively mounted on the accessory mounting seat in at least two working forms, and can be used for a plurality of correction steps.

Description

Technical Field

[0001] The present invention relates to the technical field of tooth correction, and in particular to an accessory component and a shell-shaped dental instrument. Background Art

[0002] Shell-shaped dental appliances made of polymer materials are becoming more and more popular due to their advantages of being beautiful, convenient, and easy to clean. When using shell-shaped dental appliances for orthodontic treatment, a series of shell-shaped dental appliances are usually required, each of which has a cavity for accommodating teeth, and the geometry of the cavity basically matches the tooth layout desired to be achieved in the treatment step.

[0003] Generally, in many cases, it is difficult to ensure that the corrective force of appropriate size and direction is applied to the teeth by relying solely on the shell-shaped dental appliance itself. Therefore, the current shell-shaped dental appliance may be provided with an accessory component. However, once the accessory component is installed on the appliance body, its relative position and working form are fixed. When the corrective force of the accessory needs to be adjusted, a new shell-shaped dental appliance can only be replaced. Summary of the invention

[0004] The object of the present invention is to provide an accessory assembly and a shell-shaped dental instrument, wherein the accessory can be installed on the accessory interface in at least two working forms, and can meet the needs of multiple correction steps.

[0005] One embodiment of the present invention provides an accessory assembly, including an accessory and an accessory mounting seat for mounting the accessory, wherein the accessory mounting seat is provided with at least two mounting openings in the circumferential direction, and the accessory is detachably fixedly mounted in any one of the mounting openings, and the accessory mounting seat has a limiting portion, and the limiting portion is used to limit the radial and axial movement of the accessory.

[0006] As a further improvement of an embodiment of the present invention, the accessory is a towing hook.

[0007] As a further improvement of one embodiment of the present invention, the accessory mounting seat has a distal tooth surface, a proximal tooth surface opposite to the distal tooth surface, and a circumferential surface connecting the distal tooth surface and the proximal tooth surface, the at least two mounting ports are opened on the circumferential surface, the middle part of the accessory mounting seat is provided with a hollow part connected to the mounting port to form the limiting part, the accessory includes a retaining part cooperating with the limiting part, and the distal tooth surface and the proximal tooth surface are used to limit the axial movement of the retaining part.

[0008] As a further improvement of one embodiment of the present invention, the accessory mounting seat is provided with a plurality of mounting walls spaced apart along the circumferential direction, the mounting opening is formed between any two adjacent mounting walls, the limiting portion includes an inner end portion of the mounting wall, the inner end portion surrounds the hollow portion, and when the accessory is mounted on the mounting seat, the inner end portion of the mounting portion abuts against the retaining portion to limit radial movement of the retaining portion.

[0009] As a further improvement of an embodiment of the present invention, when the accessory is fixedly installed in the installation opening, the retaining portion and the limiting portion are interference fit, and the retaining portion and / or the limiting portion undergo elastic deformation.

[0010] As a further improvement of an embodiment of the present invention, the hardness of one of the retaining portion and the limiting portion is higher than the hardness of the other.

[0011] As a further improvement of an embodiment of the present invention, the maximum width of the retaining portion is greater than the width of the installation opening, and the retaining portion can be elastically deformed to pass through the installation opening and cooperate with the limiting portion.

[0012] As a further improvement of one embodiment of the present invention, the retaining portion includes a bottom surface, a top surface and a side surface connecting the bottom surface and the top surface, the side surface of the retaining portion includes two symmetrical concave arc surfaces and a convex arc surface connecting the two concave arc surfaces, the distance between the two concave arc surfaces increases from the side away from the convex arc to the side close to the convex arc surface, when the accessory is installed on the accessory mounting base, the convex arc surface contacts the inner end of the mounting wall, the minimum distance between the concave arc surfaces is less than the width of the mounting opening, and the chord length of the convex arc of the convex arc surface is greater than the width of the mounting opening.

[0013] As a further improvement of an embodiment of the present invention, the cross-section of the end of the installation opening away from the limiting portion is trapezoidal, and the width of the side close to the limiting portion is smaller than the width of the side away from the limiting portion.

[0014] As a further improvement of one embodiment of the present invention, the number of the installation openings is an even number, and the installation openings are collinear in pairs, and the inner ends of the installation walls of the two collinear installation openings respectively abut against the convex arc surface and the two sections of the concave arc surface.

[0015] As a further improvement of one embodiment of the present invention, six mounting walls are circumferentially spaced apart inside the accessory mounting seat, and the distance between the ends of any two symmetrical mounting walls is smaller than the chord length of the convex arc. When the accessory is installed to the mounting port, the inner end of the mounting wall of the mounting port for installing the accessory abuts against the convex arc surface, the inner end of the mounting wall of the opposite mounting port abuts against the concave arc surface, and the other mounting walls abut against the connection between the concave arc surface and the convex arc surface.

[0016] As a further improvement of one embodiment of the present invention, the outer contour of the accessory mounting seat is a hexagonal prism, the six side surfaces of the hexagonal prism form the circumferential surface, each of the six side surfaces is provided with the mounting opening, and the cross-section of the mounting wall is an axially symmetrical hexagon.

[0017] As a further improvement of an embodiment of the present invention, each of the mounting ports can be selectively connected to at least two types of accessories.

[0018] As a further improvement of an embodiment of the present invention, the at least two types of accessories include traction hooks and archwire accessories.

[0019] As a further improvement of one embodiment of the present invention, the archwire accessories include at least one of a palatal bead trainer, a tongue spike, a tongue grid, an arch expansion auxiliary arch, a transverse palatal rod, a Nance support, a segmental arch and other multi-purpose auxiliary arches.

[0020] To achieve one of the above-mentioned purposes of the invention, one embodiment of the present invention further provides a shell-shaped dental instrument, which includes a shell-shaped body, wherein the shell-shaped body forms a cavity for accommodating teeth, and further has an accessory assembly of any of the above-mentioned embodiments, wherein an accessory mounting seat is arranged on the shell-shaped body.

[0021] As a further improvement of an embodiment of the present invention, the shell-shaped body is provided with an accessory installation area, the accessory installation area has a bonding surface, and the bottom surface of the accessory mounting seat is bonded or welded to the bonding surface.

[0022] The accessory assembly and shell-shaped dental instrument provided by the present invention have an accessory mounting seat with at least two mounting openings in the circumferential direction, and the accessory can be selectively installed in any one of the mounting openings to obtain different working forms. During use, the doctor can adjust the working form of the accessory according to the patient's tooth arrangement and correction plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a shell-shaped dental instrument equipped with a traction hook according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of explosion of shell-shaped dental instrument shown;

[0025] Figure 3 for Figure 1 A schematic diagram of an accessory mounting seat for a shell-shaped dental instrument is shown;

[0026] Figure 4 for Figure 3 A schematic diagram of the AA section of the accessory mounting base shown;

[0027] Figure 5 for Figure 1 The schematic diagram of the AA cross section of the shell-shaped dental device shown;

[0028] Figure 6 This is a schematic diagram of a shell-shaped dental appliance for installing an archwire-like accessory according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following detailed description refers to the drawings that form a part of this specification. The illustrative embodiments mentioned in the specification and the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present application. Under the enlightenment of the present application, those skilled in the art will understand that many other embodiments can be adopted, and various changes can be made to the described embodiments without departing from the main purpose and scope of protection of the present invention. It should be understood that the various aspects of the present application described and illustrated herein can be arranged, replaced, combined, separated and designed according to many different configurations, and these different configurations are within the scope of protection of the present application.

[0030] In view of the above problems of the existing shell-shaped dental instruments, the inventors of the present invention have developed a new accessory component and a shell-shaped dental instrument having the accessory component after extensive research.

[0031] See also Figure 1 , Figure 2 , schematically shows a shell-shaped dental instrument in one embodiment of the present invention, the shell-shaped dental instrument is installed with an accessory 30, and the accessory 30 is schematically a traction hook. Figure 3 , Figure 4 , schematically showing an accessory mounting seat 20 in one embodiment of the present invention.

[0032] The shell-shaped dental instrument includes a shell-shaped body 10 , which is formed with a cavity S for accommodating teeth. The shell-shaped dental instrument also includes an accessory assembly. The accessory assembly may include an accessory 30 and an accessory mounting seat 20 for mounting the accessory 30 . The accessory mounting seat 20 may be disposed on the shell-shaped body 10 .

[0033] In this embodiment, the accessory mounting seat 20 is formed separately from the shell-shaped body 10. The shell-shaped body 10 may be provided with an accessory mounting area, and the accessory mounting seat 20 may be mounted in the accessory mounting area. The accessory mounting area may have a bonding surface 11, and the accessory mounting seat 20 may have a bottom surface 21. The bottom surface 21 and the bonding surface 11 may both be flat planes, and the bottom surface 21 of the accessory mounting seat 20 and the bonding surface 11 may be bonded or welded together.

[0034] Of course, in other embodiments, the accessory mounting seat 20 may also be integrally formed with the shell-shaped body 10 .

[0035] In this embodiment, the accessory mounting seat 20 is provided with at least two mounting openings 24 in the circumferential direction Z, and the accessory 30 is detachably fixedly mounted in any mounting opening 24. The accessory mounting seat 20 has a limiting portion 26, which is used to limit the movement of the accessory 30 in the radial direction Y and the axial direction X.

[0036] The accessory mounting seat 20 may have a proximal surface, a distal surface opposite to the proximal surface, and a circumferential surface 23 connecting the proximal surface and the distal surface. The proximal surface may be close to the lingual side, the distal surface may be close to the buccal side, the proximal surface may be a bottom surface 21 connected to the joint surface 11 of the shell-shaped body 10, and the distal surface may be a top surface 22.

[0037] In this embodiment, the direction from the lingual side to the buccal side can be defined as the axial direction X, the direction around the axial direction X can be defined as the circumferential direction Z, and the direction perpendicular to the axial direction X can be defined as the radial direction Y.

[0038] The accessory mounting seat 20 is provided with at least two mounting openings 24 in the circumferential direction Z. The at least two mounting openings 24 can be provided on the circumferential surface 23, and the opening directions of the at least two mounting openings 24 are different. The cross section of the mounting opening 24 can be circular. When the cross section of the mounting opening 24 is circular, the axis of the mounting opening 24 can be set at an angle. The mounting opening 24 can also be square. When the cross section of the mounting opening 24 is square, the extension direction of the at least two mounting openings 24 can be set at an angle.

[0039] Different installation openings 24 may provide installation positions for different working modes of the accessory 30 . Under different working modes, the magnitude and direction of the correction force generated by the same accessory 30 may be different.

[0040] During use, the doctor can adjust the installation position of the accessory 30 according to the patient's treatment plan, and selectively install the accessory 30 to any installation port 24, thereby adjusting the working form of the accessory 30. In different correction steps, the doctor can also directly adjust the working form of the accessory 30 according to the patient's treatment plan without replacing the shell body 10.

[0041] The shell-shaped dental instrument provided in this embodiment has an accessory mounting seat 20 that provides at least two mounting ports 24 of working forms for the accessory 30, which can reduce the number of times the shell-shaped body is replaced.

[0042] In this way, when using the shell-shaped dental instrument, the doctor can select the most suitable angle to install the attachment 30 according to the patient's condition to obtain the best correction force.

[0043] In this embodiment, the accessory 30 is a traction hook. The traction hook can be a standard part, which can be pre-made into shapes and sizes that meet different correction needs using different materials. The traction hook 30 can also be a customized part, which can be customized according to the individual patient's situation and treatment needs. The accessory 30 may include a rod, and the rod may have a working end and an assembly section. The working end may be provided with a hook head, and the assembly end may be inserted into the mounting port 24 and fixed to the accessory mounting seat 20. The traction hook may be connected to an elastic member to generate traction. The magnitude and direction of the applied traction force will change depending on the direction of the traction hook. By providing a plurality of mounting ports 24 with different opening directions in the circumferential direction Z, installation positions of working forms in different directions can be provided for the traction hook. The doctor can flexibly adjust the installation direction of the traction hook according to the patient's tooth arrangement and treatment plan without replacing the shell-like body 10, thereby adjusting the direction and magnitude of the force applied by the traction member.

[0044] For further information, see Figure 5 In one embodiment of the present invention, the accessory mounting seat 20 is hollow, and a hollow portion communicating with the mounting port 24 is provided in the middle of the accessory mounting seat 20, and the hollow portion forms a limiting portion 26. The accessory 30 includes a retaining portion 31 that cooperates with the limiting portion 26, and the retaining portion 31 can be provided on one side of the assembly end of the rod. When the accessory 30 is installed on the accessory mounting seat 20, the retaining portion 31 cooperates with the limiting portion 26, that is, the retaining portion 31 is placed in the hollow portion, and the proximal and distal tooth surfaces of the accessory mounting seat 20 can limit the movement of the retaining portion 31 along the axial direction X, that is, limit the movement of the accessory 30 along the axial direction X.

[0045] The accessory mounting seat 20 may be provided with a plurality of mounting walls 25 at intervals along the circumferential direction Z, and a mounting opening 24 is formed between any two adjacent mounting walls 25. The inner end portions 27 of the mounting walls 25 surround the hollow portion, and the limiting portion may include the inner end portions 27 of the mounting walls 25. When the accessory 30 is mounted on the mounting seat, the inner end portion 27 of the mounting portion abuts against the retaining portion 31 to limit the movement of the retaining portion 31 along the radial direction Y.

[0046] In this embodiment, the retaining portion 31 may have a bottom surface, a top surface opposite to the bottom surface, and a side surface connecting the bottom surface and the top surface. The bottom surface and the top surface of the retaining portion 31 may be flat surfaces. When the accessory 30 is mounted on the accessory mounting seat 20, the bottom surface of the retaining portion 31 is parallel to and in contact with the bottom surface 21 of the accessory mounting seat 20, and the top surface of the retaining portion 31 is parallel to and in contact with the top surface 22 of the accessory mounting seat 20, thereby limiting the movement of the retaining portion 31 in the axial direction X; the inner end 27 of the mounting wall 25 abuts against the side surface of the retaining portion 31, thereby limiting the movement of the retaining portion 31 in the radial direction Y. That is, by providing a hollow portion to form the limiting portion 26, the accessory 30 can be limited in the axial direction X and the radial direction Y at the same time.

[0047] Furthermore, in one embodiment of the present invention, when the accessory 30 is fixedly installed in the installation opening 24, the retaining portion 31 and the limiting portion 26 are interference fit, and the retaining portion 31 and / or the limiting portion 26 can undergo elastic deformation.

[0048] In this embodiment, the hardness of one of the retaining portion 31 and the limiting portion 26 is higher than the hardness of the other, so that the installation and disassembly of the accessory 30 can be facilitated, and the one with lower hardness between the retaining portion 31 and the limiting portion 26 can easily undergo elastic deformation to form an interference fit.

[0049] The attachment 30 is limited to move relative to the attachment mounting seat 20 by the interference fit between the retaining portion 31 and the limiting portion 26. When the attachment 30 is fixedly mounted in the mounting opening 24, the rod portion can be inserted into the mounting opening 24, the rod portion can be loosely fitted with the mounting opening 24, and the extension direction of the rod portion is the same as the extension direction of the mounting opening 24, and the mounting opening 24 can only play a directional role. At the same time, the retaining portion 31 and the limiting portion 26 are interference-fitted to limit the movement of the attachment 30 relative to the attachment mounting seat 20, so that the attachment 30 is fixedly mounted in the mounting opening 24.

[0050] Furthermore, in one embodiment of the present invention, the maximum width of the retaining portion 31 is greater than the width of the installation opening 24 , and the retaining portion 31 can be elastically deformed to pass through the installation opening 24 and cooperate with the limiting portion 26 .

[0051] In this embodiment, when installing the accessory 30 to the accessory mounting seat 20, the accessory 30 can be first inserted into the mounting opening 24 and a force directed inward can be applied to push the accessory 30 into the mounting opening 24. Since the width of the retaining portion 31 is greater than the width of the mounting opening 24, the retaining portion 31 undergoes elastic deformation until the retaining portion 31 enters the limiting portion 26. The retaining portion 31 and the limiting portion 26 are interference fit. The retaining portion 31 still undergoes elastic deformation, but the elastic deformation amount is reduced. At this time, unless a large outward pulling force is applied to the accessory 30, the accessory 30 will not move. During use, the force applied to the accessory 30, such as the traction force applied to the traction hook, often forms a certain angle with the rod of the traction member, and does not apply a force along the extension direction of the rod to the traction hook. Moreover, the traction force is small and the accessory 30 will not be directly pulled out of the mounting opening 24.

[0052] After completing this correction step, the doctor applies an outward pulling force to the attachment 30, and the retaining portion 31 continues to deform elastically and comes out through the installation opening 24. When performing the next correction step, the doctor can install the attachment 30 to other installation openings 24 and adjust the installation position and correction force of the attachment 30 according to the patient's tooth arrangement and treatment plan.

[0053] In this embodiment, the side surface of the retaining portion 31 includes concave arc surfaces 312 that are symmetrical at both ends and a convex arc surface 311 connecting the two concave arc surfaces 312. The distance between the two concave arc surfaces 312 increases from the side away from the convex arc surface 311 to the side close to the convex arc surface 311. When the accessory 30 is installed on the accessory 30 mounting base, the convex arc surface 311 contacts the inner end 27 of the mounting wall 25.

[0054] The cross section of the retaining portion 31 may be an axisymmetric figure, and the axis of symmetry may pass through the center of the convex arc of the convex arc surface 311. The chord length of the convex arc may be greater than the width of the installation opening 24, and the minimum distance between the two concave arc surfaces 312 may be less than the width of the installation opening 24.

[0055] The convex arc surface 311 side can be the working end of the accessory, and the concave arc surface 312 side can be the assembly end of the accessory, that is, the end of the accessory. When the accessory 30 is installed on the accessory 30 mounting base, the accessory 30 is inserted into the mounting opening 24 from the concave arc surface 312 side, and the distance between the two concave arc surfaces 312 of the retaining portion 31 gradually increases. The concave arc surface can play a guiding role during the insertion process, making it easier to insert the retaining portion 31 into the mounting opening 24. In the process of removing the accessory 30, the convex arc surface plays a guiding role, making it easier to pull the accessory 30 out of the mounting opening 24.

[0056] In this embodiment, the cross section of the end of the mounting opening 24 away from the limiting portion 26 is trapezoidal, and the width of the trapezoidal shape on the side close to the limiting portion 26 is smaller than the width on the side away from the limiting portion 26. It can be understood that the opening of the mounting opening 24 is in a trumpet shape that expands outward, so that it is easier to insert the accessory 30 into the mounting opening 24.

[0057] Furthermore, in one embodiment of the present invention, the number of the mounting openings 24 is an even number, and the mounting openings 24 are collinear in pairs, and the inner side ends 27 of the mounting walls 25 of the two collinear mounting openings 24 respectively abut against the convex arc surface 311 and the two concave arc surfaces 312. Both sides of the retaining portion can be simultaneously inserted into a pair of oppositely disposed mounting openings 24.

[0058] In this embodiment, when the number of the mounting openings 24 is 2, the accessory 30 can have two working modes, and in the two working modes, the relative angle of the accessory 30 is 180°. The accessory 30 can be inserted from one mounting opening 24. When the accessory 30 is inserted into the mounting opening 24, the retaining portion 31 and the limiting portion 26 cooperate, and at the same time, the end of the accessory 30 is inserted into another mounting opening 24 that is colinear with the mounting opening 24. Of course, the accessory 30 can also be inserted from another opposite mounting opening 24. When the retaining portion 31 and the limiting portion 26 cooperate, the end of the accessory 30 is inserted into the mounting opening 24.

[0059] In this way, the mounting walls 25 of the two opposite mounting openings 24 can both be used for limiting, and the overall structure is simpler.

[0060] In this embodiment, the accessory mounting seat 20 may be provided with six mounting openings 24, and the six mounting openings 24 may be arranged along the circumferential direction Z. Six mounting walls 25 may be arranged in the accessory mounting seat 20 at intervals along the circumferential direction, and a mounting opening 24 is formed between any two adjacent mounting walls 25. The limiting portion 26 includes an inner end portion 27 of the mounting wall 25. When the accessory 30 is mounted on the mounting seat, the inner end portion 27 of the mounting portion abuts against the retaining portion 31 to limit the movement of the accessory 30 in the radial direction Y. The distance between the ends of any two symmetrical mounting walls 25 is less than the chord length of the convex arc.

[0061] When the accessory 30 is mounted on the accessory mounting seat 20, the inner end 27 of the mounting wall 25 of the mounting opening 24 of the mounting accessory 30 abuts against the convex arc surface 311, the inner end 27 of the mounting wall 25 of the opposite mounting opening 24 abuts against the concave arc surface 312, and the other mounting walls 25 abut against the connection between the concave arc surface and the convex arc surface. Thus, the inner wall ends of the six mounting parts can limit the retaining part 31.

[0062] The distance between the ends of the two symmetrical mounting walls 25 is smaller than the chord length of the convex arc 311 , so that when the retaining portion 31 cooperates with the limiting portion 26 , the two symmetrical mounting walls 25 press against the retaining portion 31 to cause the retaining portion 31 to undergo elastic deformation, and the retaining portion 31 and the limiting portion 26 have an interference fit.

[0063] In this embodiment, the cross section of the mounting wall 25 may be an axisymmetric hexagon. The outer contour of the accessory mounting seat 20 may be a hexagonal prism, and the six sides of the hexagonal prism form a circumferential surface 23, and each of the six sides is provided with a mounting opening 24. The symmetry axis of the cross section of the mounting wall 25 may pass through two symmetrical edges of the hexagonal prism.

[0064] In this embodiment, the bottom surface 21 of the accessory mounting seat 20 can be pasted or welded to the outer surface of the shell-shaped body 10, and the center of the top surface 22 can be provided with an observation hole 28. The observation hole 28 can be directly opposite to the area of ​​the limiting portion 26, and the accessory 30 can be observed through the observation hole 28 to see whether it is installed in place.

[0065] Furthermore, in one embodiment of the present invention, each accessory 30 mounting opening 24 can be selectively connected to at least two types of accessories 30 .

[0066] In this embodiment, at least two types of accessories 30 include traction hooks and arch wire accessories, wherein the arch wire accessories 30 include at least one of a palatal bead trainer, a tongue spike, a tongue grid, an expansion arch auxiliary arch, a transverse palatal rod, a Nance support, a segmental arch and other multi-purpose auxiliary arches.

[0067] See also Figure 6 , provides a schematic diagram of archwire accessories installed on an accessory mounting base.

[0068] The archwire of the archwire accessory can be inserted into a pair of collinear mounting openings 24, and one end of the archwire can be bent to prevent the archwire from coming out of the mounting opening 24 during use. Of course, the end of the archwire can also be fixed in position by other means such as a clip.

[0069] In this embodiment, the accessory mounting seat 20 can selectively connect at least two accessories 30, which increases the versatility and usage time of the shell-shaped dental instrument. During the correction process, the number of replacement times of the shell-shaped body can be reduced. The doctor can replace the accessory 30 or adjust the working form of the accessory 30 according to the patient's correction needs.

[0070] In summary, in the accessory assembly and shell-shaped dental instrument provided by the present invention, the accessory mounting seat 20 is provided with at least two mounting openings 24 in the circumferential direction Z to provide at least two installation positions for the accessory 30 in working forms. The accessory 30 can be detachably installed in any mounting opening 24. During use, the doctor can change the working form of the accessory 30 according to the patient's tooth arrangement and correction plan to obtain appropriate correction force without frequently replacing the accessory mounting seat 20 and the shell-shaped main body 10.

[0071] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0072] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An accessory assembly, comprising an accessory and an accessory mounting seat for mounting the accessory, characterized in that: The accessory mounting seat is provided with at least two mounting openings in the circumferential direction, and the accessory is detachably fixedly mounted in any one of the mounting openings. The accessory mounting seat has a limiting portion, and the limiting portion is used to limit the movement of the accessory in the radial and axial directions.

2. The accessory assembly according to claim 1, wherein: The accessory is a towing hook.

3. The accessory assembly according to claim 1, wherein: The accessory mounting seat has a distal tooth surface, a proximal tooth surface opposite to the distal tooth surface, and a circumferential surface connecting the distal tooth surface and the proximal tooth surface. The at least two mounting openings are opened on the circumferential surface. A hollow portion communicating with the mounting opening is provided in the middle of the accessory mounting seat to form the limiting portion. The accessory includes a retaining portion cooperating with the limiting portion. The distal tooth surface and the proximal tooth surface are used to limit the axial movement of the retaining portion.

4. The accessory assembly according to claim 3, characterized in that The accessory mounting seat is provided with a plurality of mounting walls spaced apart along the circumferential direction, and the mounting opening is formed between any two adjacent mounting walls. The limiting portion includes an inner end portion of the mounting wall, and the inner end portion surrounds the hollow portion. When the accessory is mounted on the accessory mounting seat, the inner end portion of the mounting wall abuts against the retaining portion to limit radial movement of the retaining portion.

5. The accessory assembly according to claim 4, characterized in that When the accessory is fixedly installed in the installation opening, the retaining portion and the limiting portion are interference-fitted, and the retaining portion and / or the limiting portion are elastically deformed.

6. The accessory assembly according to claim 5, characterized in that The hardness of one of the retaining portion and the limiting portion is higher than the hardness of the other.

7. The accessory assembly according to claim 4, characterized in that The maximum width of the retaining portion is greater than the width of the installation opening, and the retaining portion can be elastically deformed to pass through the installation opening and cooperate with the limiting portion.

8. The accessory assembly according to claim 7, wherein: The retaining portion includes a bottom surface, a top surface and a side surface connecting the bottom surface and the top surface, the side surface of the retaining portion includes two symmetrical concave arc surfaces and a convex arc surface connecting the two concave arc surfaces, the distance between the two concave arc surfaces increases from the side away from the convex arc surface to the side close to the convex arc surface, when the accessory is installed on the accessory mounting base, the convex arc surface contacts the inner end portion of the mounting wall, the minimum distance between the concave arc surfaces is less than the width of the mounting opening, and the chord length of the convex arc of the convex arc surface is greater than the width of the mounting opening.

9. The accessory assembly according to claim 8, wherein: The cross section of the end of the installation opening away from the limiting portion is trapezoidal, and the width of the side close to the limiting portion is smaller than the width of the side away from the limiting portion.

10. The accessory assembly according to claim 8, wherein: The number of the installation openings is an even number, and the installation openings are collinear in pairs, and the inner ends of the installation walls of the two collinear installation openings respectively abut against the convex arc surface and the two sections of the concave arc surface.

11. The accessory assembly according to claim 10, wherein: Six mounting walls are arranged at intervals along the circumferential direction inside the accessory mounting seat, and the distance between the ends of any two symmetrical mounting walls is smaller than the chord length of the convex arc. When the accessory is installed to the mounting port, the inner end of the mounting wall of the mounting port for installing the accessory abuts the convex arc surface, the inner end of the mounting wall of the opposite mounting port abuts the concave arc surface, and the other mounting walls abut the connection between the concave arc surface and the convex arc surface.

12. The accessory assembly according to claim 11, wherein: The outer contour of the accessory mounting seat is a hexagonal prism, the six side surfaces of the hexagonal prism form the circumferential surface, each of the six side surfaces is provided with the mounting opening, and the cross section of the mounting wall is an axisymmetric hexagon.

13. The accessory assembly of claim 1, wherein: Each of the mounting ports can be selectively connected to at least two types of accessories.

14. The accessory assembly according to claim 13, wherein: The at least two types of accessories include traction hooks and archwire accessories.

15. The accessory assembly of claim 14, wherein: The archwire accessories include at least one of a palatal bead trainer, a tongue spike, a tongue grid, an arch expansion auxiliary arch, a transverse palatal rod, a Nance support, a segmental arch and other multi-purpose auxiliary arches.

16. A shell-shaped dental instrument, comprising a shell-shaped body, wherein the shell-shaped body is formed with a cavity for accommodating teeth, characterized in that: It also includes an accessory assembly as described in any one of claims 1 to 15, wherein the accessory mounting seat is arranged on the shell-shaped body.

17. The shell-shaped dental device according to claim 16, characterized in that: The shell-shaped main body is provided with an accessory installation area, and the accessory installation area has a bonding surface. The bottom surface of the accessory mounting seat is bonded or welded to the bonding surface.

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