CN212547219U - Orthodontic appliance - Google Patents

Abstract

The utility model discloses an orthodontic appliance, including main part and movable part, the main part has the archwire groove that is used for holding the archwire, movable part and main part cooperation and can move between open position and closed position for the main part, orthodontic appliance still includes fixed knot structure, fixed knot structure is used for with movable part fixes at least closed position, fixed knot structure is including the elastic component and the movable part that are arranged in one of them of main part and movable part, the movable part includes at least one overhang, the overhang is received in the other one of main part and movable part, the movable part can move about and fix movable part at least closed position with the elastic component in coordination, the movable part obtains the activity space through extrusion elastic component. In the opening and closing process of the movable part, the wear-resistant movable part replaces the elastic part to rub with the movable part, so that the wear resistance of the appliance is improved, and the service life of the appliance is prolonged.

Description

Orthodontic appliance

Technical Field

The utility model relates to an orthodontic appliance technical field, concretely relates to orthodontic appliance.

Background

At present, aiming at the problems of teeth or faces such as crowding of teeth, bucking of teeth, uneven arrangement of teeth, malocclusion and the like, an orthodontist treats a patient by adopting an orthodontic appliance, and orthodontic appliances such as a bracket, a buccal tube and the like are main components of the orthodontic treatment appliance. In conventional orthodontic treatment, an orthodontist affixes brackets to a patient's teeth and places an archwire into the archwire slots of the brackets, the archwire applying corrective forces through the brackets to the teeth to move the teeth into the correct positions. Conventional brackets use ligatures to retain the archwire within the archwire slot of each bracket, and self-ligating brackets have been developed that use movable parts such as pins or slides to retain the archwire within the archwire slots of the brackets. Self-ligating brackets have been successful in the marketplace today, but the structure of the brackets has continued to need improvement to complete their function, stability, and manufacturing costs.

Patent documents CN107714205B and CN208017607U disclose a self-locking orthodontic bracket in the prior art, most of the self-locking brackets in the market adopt a similar technical scheme, a concave part is arranged on the main body, one end of a fixing piece for fixing a movable part is arranged in the concave part, the other end of the fixing piece is received by an accommodating cavity on the movable part, the movement of the movable part is controlled by the elastic resilience of the fixing piece, in this scheme, the elastic piece directly contacts with the cover body, the elastic piece can repeatedly rub with the cover body in the opening and closing process of the cover body, the abrasion resistance of the elastic piece used by the bracket at present, such as memory alloy, is not ideal, after the cover body is opened and closed for many times, the elastic piece is worn seriously, and the problems that the locking of the cover body closing position is unstable or the cover body is opened too easily and the like can be caused.

The present application is directed to developing a more durable orthodontic appliance.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, the present invention provides a more durable orthodontic appliance.

The utility model provides a technical scheme that this technical problem adopted is:

an orthodontic appliance comprising a body having an archwire slot for receiving an archwire and a movable component engaged with the body and movable relative to the body between open and closed positions, the orthodontic appliance further comprising a securing structure for securing the movable component in at least the closed position, the securing structure comprising a resilient member in one of the body and the movable component and a movable member comprising at least one protruding end received in the other of the body and the movable component, the movable member being movable and cooperating with the resilient member to secure the movable component in at least the closed position, the movable member gaining access to a space for movement by compressing the resilient member. In the prior art such as CN107714205B, the elastic element directly contacts with the cover body, the elastic element will repeatedly rub against the cover body during the opening and closing process of the cover body, the abrasion resistance of the elastic element used in the current bracket, such as memory alloy, is not ideal, after the cover body is opened and closed for many times, the elastic element is worn too much, which may cause the problem that the locking of the cover body at the closing position of the cover body is unstable or is too easy to be opened, on the other hand, the solution is to control the movement and the position-limiting self-locking of the movable component by simply relying on the elastic shaft or the elastic body to bend and deform, the elasticity is determined by the elastic property of the elastic body material, the elastic property of the elastic body material is hard to adjust, and the control force of the position-locking switch of the movable component is determined by the elasticity, so the control of the self-locking switch of the prior art such as CN107714205B and CN208017607U is hard to adjust, which may cause the cover body of the self, is inconvenient for the doctor to operate. In the scheme, the movable part is controlled by the rigid movable part and the elastic part, the protruding end of the movable part is in contact friction with the movable part, and the rigid material has stronger wear resistance than the elastic material and has smaller wear after friction with the movable part, so that the movable part of the orthodontic appliance can be still stably fixed at a closed position after being opened and closed for multiple times. The elasticity of the scheme can be formed by utilizing the structure of the elastic piece, and the elasticity performance of the material can not be solely depended on, so that the scheme can generate softer elasticity, and the control force value of the position locking of the movable part can be finely adjusted and controlled by adjusting the specific shape, size, thickness and the like of the elastic piece.

In some embodiments, a blocking portion is provided on one of the movable member and the main body, the blocking portion abutting against the protruding end and blocking movement of the movable member relative to the main body when the protruding end is in the first position, and the movable member is movable relative to the main body when the protruding end is in the second position. When the protruding end is located at the first position, the movable component is located at the closing position, and the blocking part blocks the movement of the movable component, namely, the movable component is locked at the closing position; when the protruding end is located at the second position, the movable member may be moved up to the open position.

In some preferred embodiments, the protruding end is located at the first position when the elastic member is in an unstressed state, and the movable member fixes the movable member at the closed position. When the movable part is located at the closing position, the elastic piece does not apply force, on one hand, the assembly is convenient, the production efficiency is higher, the production cost is lower, on the other hand, when no external force is needed to move the movable part, the elastic piece does not apply force to the movable part, the position of the movable part is changed, the movable part can be stably located at the position, and the movable part can be locked at the closing position more stably.

In some embodiments, the resilient member can contract or expand and cooperate with the movable member to secure the movable member in at least the closed position. The elastic part can meet the requirement as long as the elastic part can provide resetting force for the movable part to enable the movable part to restore the original position, and the preferable scheme is that the spring type elastic part is adopted, the elastic part generates elasticity in a contraction and expansion mode, the elasticity can be formed by utilizing the structure of the elastic part, the elasticity performance of the material can not be simply depended on, so that the scheme can generate softer elasticity, and the control force value of the position locking of the movable part can be finely adjusted and controlled by adjusting the specific shape, size, thickness and the like of the elastic part.

In other specific embodiments, the resilient member can bend or unbend and cooperate with the movable member to secure the movable member in at least the closed position. It is also within the scope of the present application that some shape of the resilient member provides the return force to the movable member by bending.

In some specific embodiments, the elastic member includes at least one abutting wall abutting against a side wall of the movable member. The abutting wall abuts against the movable piece, when the movable piece is stressed and moves, the elastic piece is extruded to deform, after the force application on the movable piece is removed, the reset force of the elastic piece provides reset force for the movable piece, and in the process that the elastic piece restores to the original shape, the movable piece restores to the initial position. The number of the abutting walls can be one, or two, and when the movable member is arranged in the middle of the elastic member, the elastic member can comprise two abutting walls.

In other specific embodiments, the movable member is provided with a hole, and the elastic member is inserted into the hole. When the movable part is stressed and moves, the elastic part is driven to deform, and after the force application of the movable part is removed, the reset force of the elastic part provides reset force for the movable part, and the movable part restores to the initial position in the process of restoring the original shape. In a further preferred embodiment, the hole is a through hole through which the elastic member passes.

In some preferred embodiments, the movable member is movable and secures the movable member in at least the closed position in cooperation with the elastic member for providing the movable member with a movable space and a restoring force. The movable part can move or rotate, or the combination of moving and rotating.

In some preferred embodiments, the movable member is rotatable about an axis generally parallel to the labial-lingual or gingival-lingual direction. The direction of rotation of the movable member may be any, and in a preferred embodiment, is about an axis generally parallel to the labial-lingual or gingival-lingual direction.

In other specific embodiments, the fixing structure includes two elastic members located at both sides of the movable member, and the elastic members are used for providing the movable member with a moving space and a restoring force.

In some specific embodiments, the elastic member is any one of "N" -shaped, "M" -shaped, "pi" -shaped, "Contraband" -shaped, "C" -shaped, "S" -shaped, "L" -shaped, "T" -shaped, "U" -shaped, "H" -shaped, linear, and zigzag in a cross-section substantially parallel to the labial direction or the gingival direction. The elastic member may be of a shape that is contractible or bendable in a cross section in the labial-lingual direction or a shape that is contractible or bendable in the gingival-gingival direction, as long as the elastic member can be contracted or bent, and the elastic member can provide the movable member with a space for movement and a restoring force.

In some embodiments, the movable member is a plate-like member or a pin. The movable piece can be made into other arbitrary shapes, and can be made into a plate shape or a pin shape, so that the structure is simple, and the cost is lower.

In some specific embodiments, one of the movable member and the main body is provided with a receiving cavity at a surface facing the movable member, and the protruding end of the movable member is received in the receiving cavity.

The present invention will be further explained with reference to the drawings and examples.

Drawings

Fig. 1 is a front view of an orthodontic appliance of embodiment 1.

Fig. 2 is an exploded view of the orthodontic appliance of example 1.

Fig. 3 is a cross-sectional view of section a-a of fig. 1 with the orthodontic appliance closed.

Fig. 4 is a schematic view of the movable member in a closed state of the orthodontic appliance.

Fig. 5 is a cross-sectional view of the section a-a in fig. 1 with the orthodontic appliance in an open state.

Fig. 6 is a schematic structural view of the movable member in an open state of the orthodontic appliance.

Fig. 7 is a sectional view of the orthodontic appliance of example 2.

Fig. 8 is an exploded view of the orthodontic appliance of example 2.

Fig. 9 is an exploded view of the orthodontic appliance of example 4.

Fig. 10 is a top view of the orthodontic appliance of example 5.

Fig. 11 is an exploded view of the orthodontic appliance of example 5.

Fig. 12 is a cross-sectional view of section B-B of fig. 10 with the orthodontic appliance closed.

Fig. 13 is a cross-sectional view of the orthodontic appliance at section C-C of fig. 10 in a closed position.

Fig. 14 is a rear view of the movable member in a closed state of the orthodontic appliance.

Fig. 15 is a cross-sectional view of the orthodontic appliance at section C-C of fig. 10 in an open position.

Fig. 16 is a rear view of the movable member in an open state of the orthodontic appliance.

FIG. 17 is a schematic view of a dental reference frame.

Detailed Description

In the following structural description, it is necessary to describe the orthodontic brackets using a reference frame to the teeth, see in particular fig. 17, and as used herein, terms such as labial, lingual, mesial, distal, occlusal, gingival are used to describe the orthodontic brackets as the reference frame for the corresponding teeth. However, embodiments of the invention are not limited to the chosen frame of reference and the terms described, as orthodontic brackets may be used on other teeth and other orientations within the oral cavity. For example, orthodontic brackets may also be used bonded to the lingual surfaces of teeth and are within the scope of the invention. Those skilled in the art will appreciate that when there are variations in the reference frame, the descriptive terms used herein may not be directly applicable. However, embodiments of the invention are intended to be independent of position and orientation within the oral cavity and the relative terms used to describe the embodiments are merely intended to provide an unambiguous explanation of the embodiments in the drawings. Likewise, the relative terms labial, lingual, mesial, distal, occlusal and gingival are in no way intended to limit the present invention to a particular position or orientation.

It is to be noted that the relative terms labial, lingual, mesial, distal, jaw plane and jaw-gum are the terms of art for orthodontic treatment. Taking the mandibular teeth as an example, the surface of the orthodontic bracket may be roughly divided into six planes. The face facing the lip is the labial side face of the orthodontic bracket, the face facing the tongue is the lingual side face of the orthodontic bracket, the labial side face is opposite to the lingual side face, and the direction formed by the labial side face and the lingual side face is also called the labial-lingual direction. The surface facing the occlusion of the upper jaw teeth is the occlusal surface of an orthodontic bracket, and can also be called as a jaw plane and a jaw end surface; the surface of the gum tissue facing the bonded teeth is the gum end surface of the orthodontic bracket; the direction in which the occlusal surface and the gingival surface form is also called the gingival jaw direction. The face of the tooth facing the midline of the tooth is the mesial face, the face opposite the mesial face is called the distal face, and the direction in which the mesial and distal faces are formed is called the mesial-distal direction.

And in the description of directions, such as the labial and lingual directions, it is generally referred to as bi-directional. For example, the lip-tongue direction refers to a single direction, i.e., a direction from the labial side to the lingual side, and whether or not a dash line is added is used as a distinction.

The axis inclination marking line refers to an inclined line which is arranged on the orthodontic bracket and has the same angle with the bracket axis inclination angle, and is used for more accurate positioning when a doctor uses the bracket to be bonded to a tooth surface.

Furthermore, the components and spaces described below are also described with reference to the reference system of the mandibular teeth, such as the gingival direction, jaw face, etc. of a component, but without limitation to the component and space.

Example 1:

referring to fig. 1 to 3, fig. 1 is a front view of an orthodontic appliance of example 1, fig. 2 is an exploded view of the orthodontic appliance of example 1, fig. 3 is a sectional view of a-a section of fig. 1 in a closed state of the orthodontic appliance, and the present embodiment provides an orthodontic appliance including a main body 100 having an archwire slot 120 for receiving an archwire, and a movable member 200 coupled with the main body 100 and movable between an open position and a closed position with respect to the main body 100, and further including a fixing structure for fixing the movable member 200 in at least the closed position, the fixing structure including an elastic member 300 and a movable member 400 in one of the main body 100 and the movable member 200, and in the present embodiment, the movable member 200 is a locking slider, in other embodiments, the movable component may be other structures such as a clamp, the elastic element 300 and the movable element 400 are disposed on the main body 100, the main body 100 is provided with a recess 110, the elastic element 300 and the movable element 400 are disposed in the recess 110, and the orthodontic appliance may be a bracket or a buccal tube. The movable member 400 includes at least one protruding end 410, and the protruding end 410 is received in the other one of the main body 100 and the movable member 200, and in this embodiment, the protruding end 410 is received in the movable member 200. The movable member 400 is rotatable and fixes the movable member 200 at least in the closed position in cooperation with the elastic member 300, and the movable member 400 obtains the movement space and the reset force by pressing the elastic member 300.

The elastic parts in the prior art such as CN107714205B directly contact with the cover body, the elastic parts can repeatedly rub with the cover body in the opening and closing process of the cover body, the abrasion resistance of the materials such as memory alloy and the like adopted by the elastic parts used by the current bracket is not ideal enough, and after the cover body is opened and closed for many times, the elastic parts are abraded too much, so that the problems that the locking of the cover closing position of the cover body is unstable or the cover body is opened too easily and the like can be caused; on the other hand, the proposal controls the movement of the movable part and the limit self-locking by simply depending on the bending deformation of the elastic shaft or the elastic body, the elasticity is determined by the elastic performance of the elastic body material, the elastic performance of the elastic body material is difficult to adjust, and the control force of the position locking switch of the movable part is determined by the elasticity, so the control of the self-locking switch of the prior art like CN107714205B and CN208017607U is difficult to adjust, which easily causes the cover of the self-locking bracket to be unstable to cover or the switch for opening the cover to use large force, thus being inconvenient for the doctor to operate. In the scheme, the movable part 200 is controlled by the rigid movable part 400 in cooperation with the elastic part 300, the protruding end 410 of the movable part 400 is in contact friction with the movable part 200, the abrasion resistance of a rigid material is higher than that of an elastic material, and the abrasion after the rigid material is in friction with the movable part 200 is smaller, so that the movable part 200 of the orthodontic appliance can still stably fix the movable part 200 at the closed position after being opened and closed for multiple times.

Referring to fig. 3 to 6, the movable member 400 is connected to the main body 100 by a shaft 500, the movable member 400 rotates around the shaft 500 and fixes the movable member 200 in at least the closed position in cooperation with the elastic member 300, and the elastic member 300 is used to provide a moving space and a restoring force to the movable member 400. The movable part can move or rotate, or the combination of moving and rotating. In particular, the movable member 400 can rotate about an axis substantially parallel to the gingival jaw direction. The direction of rotation of the movable member 400 may be arbitrary, or may be along an axis substantially parallel to the labial-lingual direction. In other embodiments, the movable member 400 may not be fixedly connected to the main body 100, and may be directly placed in the recess 110.

In this embodiment, the elastic member 300 can contract and expand and cooperate with the movable member 400 to fix the movable member 200 in at least the closed position. By adopting the spring type elastic member 300, the elastic member 300 generates elasticity by contracting and expanding, the elasticity can be formed by utilizing the structure of the elastic member 300, and the elasticity performance of the material can not be solely depended on, so the scheme can generate softer elasticity, and the control force value of the position locking of the movable component 200 can be finely adjusted and controlled by adjusting the specific shape, size, thickness and the like of the elastic member 300. The elastic member 300 is of any one of an "N" shape, "M" shape, "pi" shape, "Contraband" shape, "C" shape, "S" shape, "L" shape, "T" shape, "U" shape, "H" shape, linear shape, and a broken line shape on a cross section approximately parallel to the labial-lingual direction or the gingival-gingival direction, and in this embodiment, the cross section of the elastic member 300 in the labial-lingual direction is of an "N" shape. As long as the elastic member 300 can be contracted or bent, it may have a shape that is contracted or bent in a cross section in the labial-lingual direction, or a shape that is contracted or bent in the gingival-gingival direction, and may provide a movement space and a restoring force for the movable member 400.

Referring to fig. 3 to 4, fig. 3 is a sectional view of a section a-a of fig. 1 in a closed state of the orthodontic appliance, and fig. 4 is a schematic structural view of a movable member in the closed state of the orthodontic appliance, wherein a stopper 210 is provided on one of the movable member 200 and the main body 100, and a protruding end of the movable member is received in the receiving cavity. In this embodiment, the movable member 400 and the elastic member 300 are disposed on the main body 100, and the blocking portion 210 is disposed on the movable member 200. In this embodiment, an accommodating cavity 220 is provided on a surface of the movable member 200 facing the movable member 400, the blocking portion 210 is provided on a side wall of the accommodating cavity 220, the blocking portion 210 is a protrusion structure, in other embodiments, the blocking portion 210 may have any other structure, and the accommodating cavity 220 may be a through hole or other alternative structures. The protruding end 410 is located at the first position in fig. 3-4, when the blocking portion 210 abuts against the protruding end 410 and blocks the movable member 200 from moving relative to the main body 100, when the movable member 200 is located at the closed position, and the blocking portion 210 blocks the movable member 200 from moving, i.e., locks the movable member 200 at the closed position. At this time, the elastic member 300 is in an unstressed state, that is, in an undeformed state, and when the movable member 200 is located at the closed position, the elastic member 300 does not apply a force, so that on one hand, the assembly is convenient, the production efficiency is higher, and the production cost is lower, and on the other hand, when no external force is applied to move the movable member, the elastic member 300 does not apply a force to the movable member 400, so that the position of the movable member 400 is changed, the movable member 400 can be stably located at the position, and the movable member 200 can be more stably locked at the closed position.

The elastic member 300 includes at least one abutting wall 310, and the abutting wall 310 abuts against a side wall of the movable member 400. The abutting wall 310 abuts against the movable member 400, when the movable member 400 is forced to move or rotate, the elastic member 300 is extruded to deform, after the force applied to the movable member 400 is removed, the restoring force of the elastic member 300 provides the restoring force for the movable member 400, and in the process of restoring the original shape of the elastic member 300, the movable member 400 restores to the initial position. The abutting wall 310 may be one, or two or more, and in this embodiment, the elastic member includes one abutting wall 310.

The simpler the structure of the part, the lower its production cost, the movable member 400 can be made as a plate-like member or a pin, so that its production cost is low. The movable member 400 may be made in any other shape, and in this embodiment, the movable member 400 is a cylindrical pin.

Referring to fig. 5 to 6, fig. 5 is a sectional view of a section a-a of fig. 1 in an opened state of the orthodontic appliance, fig. 6 is a schematic structural view of a movable part of the orthodontic appliance in a movable state, the protruding end 410 is located at a second position in fig. 5 to 6, the movable part 200 can be moved relative to the main body 100, and the movable part 200 can be moved to the opened position. When the movable member 200 is moved to the open position, the side wall of the receiving cavity 220 can block the protruding end 410 from sliding out, thereby preventing the movable member 200 from sliding off the main body 100.

Example 2:

referring to fig. 7 to 8, fig. 7 is a sectional view of an orthodontic appliance of example 2, and fig. 8 is an exploded view of the orthodontic appliance of example 2, and this embodiment provides an orthodontic appliance having substantially the same structure as that of example 1 except that: in some specific embodiments, the fixed structure includes two elastic members 301 and 501 located at two sides of the movable member 401, and the elastic members 301 and 501 are used for providing a moving space and a reset force for the movable member 401. The two elastic members 301 and 501 have abutting walls 311 and 511, respectively, abutting against both sides of the movable member 401, respectively. In fig. 7, the movable member 201 is in the closed position, in which the elastic members 301 and 501 are in the unstressed state, the movable member 401 is not fixedly connected to the main body 101, the movable member 401 is movably disposed in the recess 111, when the movable member 201 is pushed by a force, the movable member 201 presses the movable member 401, the movable member 401 presses the elastic member 301, and then the movable member 401 rotates, and then the movable member 201 is allowed to move.

Example 3:

this example provides an orthodontic appliance substantially the same as the orthodontic appliance of example 2, and the configuration thereof is completely the same as that of example 2, except that: in the state shown in fig. 7, the movable member 201 is in the closed position, and at this time, the elastic members 301 and 501 are both in the stressed state, and when the movable member 201 is pushed by a force, the movable member 201 presses the movable member 401, the movable member 401 presses the elastic member 301, and then the movable member 401 moves, and the moving form is a combination of moving and rotating, and then the movable member 201 is allowed to move.

Example 4:

referring to fig. 9, fig. 9 is an exploded view of an orthodontic appliance of embodiment 4, and this embodiment provides an orthodontic appliance having substantially the same structure as embodiment 1 except that: the elastic member 302 has two abutting walls 312 and 322, and the abutting walls 312 and 322 abut against two side walls of the movable member 402, respectively. The cross-section of the elastic member 302 in the labial-lingual direction includes two "Contraband" shapes.

Example 5:

referring to fig. 10 to 13, fig. 10 is a top view of the orthodontic appliance of example 5, fig. 11 is an exploded view of the orthodontic appliance of example 5, fig. 12 is a sectional view of a section B-B of fig. 10 in a closed state of the orthodontic appliance, and fig. 13 is a sectional view of a section C-C of fig. 10 in a closed state of the orthodontic appliance, and this embodiment provides an orthodontic appliance having a front view identical to that of the orthodontic appliance of example 1, the orthodontic appliance including a main body 103, a bottom plate 503 and a movable member 203, the bottom plate 503 being for adhering to a tooth of a patient, the movable member 203 being engaged with the main body 103 and being movable between an open position and a closed position with respect to the main body 103, and further including a fixing structure for fixing the movable member 203 at least in the closed position, the fixing structure comprises an elastic piece 303 and a movable piece 403 which are positioned in the main body 103, a concave part 113 is arranged on the main body 103, and the elastic piece 303 and the movable piece 403 are arranged in the concave part 113. The movable member 403 includes at least one protruding end 413, one protruding end 413 being received in the movable member 203. The movable member 403 is capable of rotating and cooperates with the resilient member 303 to secure the movable member 203 in at least the closed position, and the resilient member 303 is capable of flexing and cooperates with the movable member 403 to secure the movable member 203 in at least the closed position.

The movable member 403 is provided with a hole into which the elastic member 303 is inserted. When the movable member 403 is forced to move or rotate, the elastic member 303 is driven to bend and deform, or the elastic member 303 is driven to expand, after the force applied to the movable member is removed, the restoring force of the elastic member 303 provides a restoring force for the movable member 403, and in the process of restoring the original shape of the elastic member 303, the movable member 403 restores to the initial position. In this embodiment, the hole is a through hole, and the elastic member 303 passes through the through hole. The cross section of the elastic member 303 in the gingival jaw direction is a broken line type, and in other embodiments, the elastic member may be a straight line type. Compared with a linear elastic member, the elasticity of the broken line type may be formed by using the structure of the elastic member, and may not simply depend on the elastic property of the material itself, and may generate a softer elasticity, and the control force value of the position locking of the movable part 203 may be finely adjusted and controlled by adjusting the specific shape, size, thickness, and the like of the elastic member 303.

Referring to fig. 13-14, fig. 13 is a sectional view of the section C-C in fig. 10 in a closed state of the orthodontic appliance, fig. 14 is a rear view of the movable member in the closed state of the orthodontic appliance, a receiving cavity 223 is provided on a surface of the movable member 203 facing the movable member 403, a blocking portion 213 is provided on a side wall of the receiving cavity 223, and a protruding end 413 of the movable member 403 is received in the receiving cavity 223. In fig. 13-14 the protruding end 413 is in the first position, when the blocking portion 213 abuts the protruding end 413 and blocks the movable member 203 from moving relative to the main body 103, when the movable member 203 is in the closed position, and when the blocking portion 213 blocks the movable member 203 from moving, i.e. locks the movable member 203 in the closed position. At this time, the elastic member 303 is in an unstressed state, that is, in an undeformed state, and when the movable member 203 is located at the closed position, the elastic member 303 does not apply a force, so that on one hand, assembly is facilitated, production efficiency is higher, and production cost is lower, and on the other hand, when no external force is applied to move the movable member, the elastic member 303 does not apply a force to the movable member 403, so that the position of the movable member 403 is changed, the movable member 403 can be stably located at the position, and the movable member 203 can be more stably locked at the closed position.

The simpler the structure, the lower the production cost of the part, and in this embodiment, the movable member 400 is a square cylindrical pin, which is low in production cost.

Referring to fig. 15-16, fig. 15 is a cross-sectional view of the orthodontic appliance at section C-C of fig. 10 in an open state, fig. 16 is a rear view of the movable member in the open state of the orthodontic appliance, and fig. 15-16 show the protruding end 413 rotated to a second position, the movable member 203 being movable relative to the main body 103, the movable member 203 being movable to the open position. When the movable member 203 moves to the open position, the side wall of the accommodating cavity 223 can block the protruding end 413 from sliding out, and then prevent the movable member 203 from sliding off the main body 103.

The present invention is not limited to the above embodiment, and various modifications and variations of the present invention are also intended to be included within the scope of the claims and the equivalent technical scope of the present invention if they do not depart from the spirit and scope of the present invention.

Claims (12)

1. An orthodontic appliance comprising a body having an archwire slot for receiving an archwire and a movable member, the movable member cooperates with the body and is movable relative to the body between an open position and a closed position, the orthodontic appliance further comprising a securing structure for securing the movable member in at least a closed position, the fixed structure includes an elastic member and a movable member in one of the main body and the movable member, the movable member includes at least one protruding end that is received in the other of the main body and the movable member, the movable member is movable and fixes the movable member in at least the closed position in cooperation with the elastic member, and the movable member acquires a movement space by pressing the elastic member.

2. The orthodontic appliance of claim 1 wherein one of said movable member and said body includes a stop that abuts said protruding end and blocks movement of said movable member relative to said body when said protruding end is in the first position and wherein said movable member is movable relative to said body when said protruding end is in the second position.

3. The orthodontic appliance of claim 2 wherein said spring in an unstressed condition with said projecting ends in said first position, said movable member securing said movable member in a closed position.

4. The orthodontic appliance of claim 1 wherein said spring member is capable of contracting or expanding and cooperates with said movable member to secure said movable member in at least a closed position.

5. The orthodontic appliance of claim 1 wherein said spring member is capable of bending or unbending and cooperates with said movable member to secure said movable member in at least a closed position.

6. The orthodontic appliance of any one of claims 1 to 5 wherein said spring member includes at least one abutment wall, said abutment wall abutting a side wall of said movable member.

7. The orthodontic appliance of any one of claims 1 to 5 wherein said movable member is provided with an aperture and said spring member is inserted into said aperture.

8. The orthodontic appliance of any one of claims 1 to 5 wherein said movable member is rotatable about an axis generally parallel to the labial-lingual or gingival-lingual direction.

9. The orthodontic appliance of any one of claims 1 to 5 wherein said anchoring structure includes two resilient members on either side of said movable member, said resilient members being adapted to provide space for movement and a return force to said movable member.

10. The orthodontic appliance of any one of claims 1 to 5, wherein said elastic member is of any one of an "N" -shape, an "M" -shape, a "pi" -shape, an "Contraband" -shape, a "C" -shape, an "S" -shape, an "L" -shape, a "T" -shape, a "U" -shape, an "H" -shape, a straight-line shape, and a broken-line shape in a cross-section generally parallel to the labial-lingual direction or the gingival-gingival direction.

11. The orthodontic appliance of any one of claims 1 to 5 wherein said movable member is a plate or pin and said movable member is a locking slide.

12. The orthodontic appliance of any one of claims 1 to 5 wherein one of said movable member and said body is provided with a receiving cavity in a surface facing said movable member, said projecting end of said movable member being received in said receiving cavity.

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