CN203183058U

CN203183058U - Interactive self-ligating bracket capable of being changed between active and passive states

Info

Publication number: CN203183058U
Application number: CN 201320061679
Authority: CN
Inventors: 黄兵民
Original assignee: Beijing Smart Technology Co Ltd
Current assignee: Beijing Smart Technology Co Ltd
Priority date: 2013-02-01
Filing date: 2013-02-01
Publication date: 2013-09-11
Anticipated expiration: 2023-02-01

Abstract

The utility model relates to an interactive self-ligating bracket capable of being changed between active and passive states. The middle part of a base of a working wing sinks downwards to form a groove; all grooves are arranged on the same groove axis; and the base is divided into a first base and a second base by the groove axis. The interactive self-ligating bracket is characterized in that the height of the first base is smaller than that of the second base; a bend-back elastic lock plate is arranged at the top part of the first base; the bend-back elastic lock plate comprises a connecting end, a spring sheet and a free end, which are sequentially connected; the connecting end is connected with the first base; the spring sheet is an elastic curve plate; the free end is suspended above a buccal labial surface of the working wing and provided with a first locking plate, a second locking plate and a baffle plate; the first locking plate, the baffle plate and the grooves form an arch wire groove jointly when the spring sheet is in a relaxed state; the grooves are arranged at the upper part of the groove wall on the second base and provided with necks which are parallel to the groove axis and can contain the second locking plate; and the interactive self-ligating bracket disclosed by the utility model can be mutually changed in active and passive working states when the position of the second locking plate changes.

Description

A kind of can be initiatively and the interactive self-locking bracket of passive switching

Technical field

This utility model relates to a kind of dental orthodontic instrument field, be specifically related to a kind of can be initiatively and the interactive self-locking bracket of passive switching.

Background technology

Orthodontic treatment is a subdiscipline that degree of specialization is higher of dental field, mainly is to rescue at tooth, jawbone, facial deformity, by recover patient's normal occlusion function gradually at oral cavity internal fixation orthodontic appliance.Bracket is the important component part of orthodontic appliance, mainly is adhered on labial teeth, canine tooth, the premolars, and orthodontic treatment is by in the groove that will rescue arch wire and be installed in bracket, and the tooth of guiding dislocation moves to desirable position.

Traditional bracket adopts the mode of ligation silk or the ligation of India rubber circle that arch wire is fixed in the groove, but this fixed form exists shortcomings such as the time-consuming inconvenience of clinical manipulation, frictional force are big, level of comfort difference.In recent years, self-locking bracket (self-ligatingbracket) orthodontic treatment that appears as patho-occlusion of rescuing system has been introduced new method.The characteristics of self-locking bracket maximum are that the self-locking structure by bracket substitutes traditional ligation silk (circle) arch wire is carried out ligation, have reduced the frictional force of orthodontic appliance inside, make to rescue efficient and significantly increase, and be a kind of quick, comfortable, safe fixed orthodontic device.At present, the self-locking bracket with respect to traditional bracket have low-frictional force, reduce anchorage loss, improve clinical manipulation efficient, the patient is to the distinct advantages of aspects such as pain reaction is light, and the engagement of self-locking bracket is stable, small and exquisite attractive in appearance, the patient wears with comfortable, easy to clean, the other time of chair shortens, further consultation prolongs at interval, and it is shorter to rescue efficient height, the course for the treatment of.Make the self-locking bracket obtain more and more just abnormal doctors' understanding and certainly.Common self-locking bracket is slide way type structure (a passive slide) or locker formula structure (a spring clip).The slide way type self-locking bracket

Groove arranges slip lid in the groove both sides, promote slip lid after including arch wire in groove, closed conduct solid, that arch wire can move freely of the common formation of slip lid and groove, bracket can initiatively not apply strength to the arch wire that is positioned in the archwire slot, therefore claims passive self-locking bracket (passiveself-ligating bracket) again.The built-in high resiliency locker of locker formula self-locking bracket, the elastic pressure that locker cuts out the back generation can act on arch wire when needed, provide to continue soft orthodontic force, therefore claim initiatively self-locking bracket (active self-ligatingbracket) again.Because the self-locking device multidigit of self-locking bracket is in the bracket metal surface, convenient with instrument or finger tip switch, the ligation process is more easy.

Present most self-locking bracket itself has certain design defect, its slip lid or locker are opened under some unexpected factor affecting easily, can lose groove to the control of arch wire if slip lid or locker accident are opened, influence therapeutic effect, instead prolonged treatment time.And, because the structure more complicated of self-locking bracket, some external force (comprising masticatory force) and doctor's maloperation all may cause the damage of self-locking bracket, thereby cause slip lid or locker to open and to close, when serious even cause the self-locking bracket to scrap, increase patient's financial burden, improved the treatment cost.Again, the self-locking device of self-locking bracket occupies on the facing usually than large space, makes that the integral thickness of self-locking bracket is bigger, may come off when chewing, and therefore there is limitation in the relatively poor child of compliance and deep overbite patient's use.Simultaneously because the short and small circle of the work wing of self-locking bracket is blunt, inconvenience of maintenance, easily slippage when adding the ligation adnexa, and inserting arch wire and taking out in the process of arch wire, the self-locking bracket is compared with traditional double-vane bracket has great uncomfortable property, usually causes patient's pain.Except above-mentioned defective, when using crooked stainless steel square silk to adjust individual teeth, arch wire is in place can't close slip lid or locker than difficulty, and these have all limited the use of traditional meticulous adjustment mode.

Chinese patent: the self-locking bracket (patent No. is 201220332362.7) that carries the elastic ring snap close on a kind of work wing discloses the self-locking bracket that carries the contrary flexure elastic collet on a kind of work wing, the work wing that comprises a bracket base and be arranged on the buccal labial surface of bracket base, the work wing comprises the pedestal that is connected with bracket base, the pedestal middle part is recessed to form groove downwards, and all grooves is on a groove axis; Pedestal is divided into first pedestal and second pedestal by the groove axis; It is characterized in that: the first pedestal top arranges a contrary flexure elastic collet, the contrary flexure elastic collet comprises shell fragment and free end, and shell fragment one end and first pedestal are fixed, and the other end connects free end, shell fragment is the rubber-like curved tabs, and free end is suspended from the buccal labial surface top of the work wing; The card and the catch that stretch out to different directions are set on the free end, and when shell fragment was relaxed state, card, catch and groove constituted archwire slot jointly.Card and catch simultaneously, same moved further, namely realize closing the arch wire gateway simultaneously and arch wire be limited in function in the archwire slot.Because this patent arranges concave edge at the terminal edge of card, top at first furrow bank arranges fixture block, the interim locking in top that is used for card end and first furrow bank, but in practical operation, the doctor need hook the card end from fixture block, as undue force, easily patient's oral cavity is scratched during operation.And this patent is passive type self-locking bracket, can't realize the mutual conversion of passive type bracket and active bracket.

The utility model content

This utility model is at the deficiencies in the prior art, proposed a kind ofly both can conveniently control opening of arch wire gateway, close, effectively be limited in arch wire in the archwire slot, can realize with the archwire slot sectional dimension being that (a kind of be more than or equal to 0.025 inch of 0.018 inch * to the standard section size again under external force, another kind is more than or equal to 0.028 inch of 0.022 inch *) thus the passive type bracket and the archwire slot sectional dimension less than the active bracket of standard section size mutually conversion realize interaction function, and it is integrated to have function, simple in structure, the high characteristics of patient wear comfort level can be initiatively and the interactive self-locking bracket of passive switching.

The technical solution of the utility model is as follows:

A kind of can be initiatively and the interactive self-locking bracket of passive switching, the one or more work wing of buccal labial surface that comprises a bracket base and be arranged on described bracket base, the described work wing comprises the pedestal that is connected with bracket base, described pedestal middle part is recessed to form groove downwards, and all described grooves are all on a groove axis; Described pedestal is divided into first pedestal and second pedestal by described groove axis; It is characterized in that: the height of described first pedestal is lower than described second pedestal, the described first pedestal top arranges a contrary flexure elastic collet, described contrary flexure elastic collet comprises link, shell fragment and the free end that connects successively, described link is connected with described first pedestal, described shell fragment is the elastic bending sheet, and described free end is suspended from the buccal labial surface top of the described work wing; First card, second card and catch are set on the described free end, and when described shell fragment was relaxed state, described first card, catch and groove constituted archwire slot jointly; The furrow bank top that described groove is positioned on described second pedestal arranges the draw-in groove that is parallel to holding of described groove axis of described second card.

When described second card was in the position of described catch, the big I in inner space that the medial surface of described shell fragment and the described first pedestal top surround was held described first card and catch.

When described shell fragment is relaxed state, the top of the end of described catch and described first pedestal joins or only stays narrow and small slit, the end of described first card and described groove are positioned at furrow bank top on described second pedestal and join or only stay narrow and small slit, and the top of the downside of described second card and described second pedestal joins or only stays narrow and small slit.

Described narrow and small slit is less than 0.3mm.

Angle between described card and the catch is right angle or approximate right angle, and the angle between described first card and second card is acute angle.

Described acute angle is less than 60 degree.

One operation window is set on the described shell fragment.

Described shell fragment thickness is 0.05 ~ 2mm.

The described work wing and contrary flexure elastic collet are made by elastic metallic.

Described elastic metallic is niti-shaped memorial alloy, Ni-Ti-based shape memory alloy, titanium-base alloy, cochrome or rustless steel.

Described bracket base, the work wing and contrary flexure elastic collet are one-body molded, and described integrated method is metal casting, metal powder injection molding, line cutting, laser engraving or laser cutting method.

Technique effect of the present utility model is as follows:

Of the present utility model a kind of can be initiatively and the interactive self-locking bracket of passive switching, the one or more work wing of buccal labial surface that comprises a bracket base and be arranged on bracket base, the work wing comprises the pedestal that is connected with bracket base, the pedestal middle part is recessed to form groove downwards, and all grooves is all on a groove axis; Pedestal is divided into first pedestal and second pedestal by the groove axis; It is characterized in that: second pedestal shown in the height of first pedestal is lower than, the first pedestal top arranges a contrary flexure elastic collet, the contrary flexure elastic collet comprises link, shell fragment and the free end that connects successively, link is connected with first pedestal, shell fragment is the elastic bending sheet, and free end is suspended from the buccal labial surface top of the work wing; First card, second card and catch are set on the free end, and when shell fragment was relaxed state, first card, catch and groove constituted archwire slot jointly; The furrow bank top that groove is positioned on second pedestal arranges the draw-in groove that holds second card that is parallel to the groove axis.When the position of second card changed, interactive self-locking bracket of the present utility model can conversion mutually under active and these two kinds of duties of passive type.Its transformation process is:

When shell fragment under relaxed state, first card, catch and groove constitute archwire slot jointly, the top of the downside of second card and second pedestal joins or only stays narrow and small slit.Catch intercepts arch wire outside " C shape " inner space that surrounds jointly at shell fragment, catch and the first pedestal top, arch wire is in archwire slot, archwire slot can be to the arch wire positive force, frictional force between groove and the arch wire is low, arch wire is in passive stress, and this moment, bracket was passive type self-locking bracket.

When second card places the draw-in groove of second pedestal, shell fragment still is in deformed state, and the position of first card moves down, and compresses the space of original archwire slot.When the insufficient space of archwire slot to hold the arch wire greater than the archwire slot size, arch wire produces active force to first card, archwire slot produces distortion, and the angle between first card and second card is diminished.This moment, first card produced counteracting force to arch wire, and arch wire is subjected to continuing the soft thrust to the groove bottom from bracket first card, and this thrust can help tooth to realize torque, positive axis, and this moment, bracket was changed passive/active modes by passive type.

When free end moves under external force, shell fragment generation deformation, catch and first card enter in the inner space, and second card moves to the original position of catch to the first card direction and forms the arch wire gateway.After arch wire enters archwire slot, discharge external force, catch, first card and second card are returned to original position, and the arch wire gateway is closed and arch wire is limited in the archwire slot.Above process can conveniently be controlled the open and close of arch wire gateway, and arch wire effectively is limited in the archwire slot.

Since the contrary flexure elastic collet be shaped as from the first pedestal top one side away from groove to groove direction turnup, cross the first pedestal top (i.e. the buccal labial surface of first pedestal), the medial surface of contrary flexure elastic collet and first pedestal top inner space of being large enough to hold first card and catch of common formation.Can outside first pedestal and the free-ended labyrinth of contrary flexure elastic collet, form the smooth surface profile of a shape as the second pedestal work wing like this, avoid in when operation effectively and when wearing the oral cavity to the patient damage.

No matter the duty of interactive self-locking bracket is active or passive type, because the contrary flexure elastic collet is formed in one with the work wing, and under the passive type duty, first card covers groove naturally and forms archwire slot, under active duty, second card snaps in the draw-in groove, initiatively arch wire is pressed to the groove bottom.Therefore do not need to apply in addition other lock buckling part, reduced the structural complexity of self-locking bracket, be convenient to install and use.And because default lock buckling parts such as slip lid can not make the archwire slot accident close or open because accident collision changes the position of slip lid yet, guaranteed the stability in use of self-locking bracket.

Description of drawings

Fig. 1 is that interactive self-locking bracket elastic lock of the present utility model is the structural representation under the relaxed state

Fig. 2 is that interactive self-locking bracket of the present utility model second card end when forming the arch wire gateway is stuck in the stage sketch map in the draw-in groove

Fig. 3 is the sketch map that the arch wire gateway is formed jointly at the top of the second card lateral surface of interactive self-locking bracket of the present utility model and second furrow bank

The sketch map of Fig. 4 when to be interactive self-locking bracket of the present utility model as active bracket use

Fig. 5 is the sketch map of interactive self-locking bracket of the present utility model when using as the passive type bracket

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Specific embodiment described herein is only in order to explaining this utility model, and is not used in restriction this utility model.

Of the present utility model can initiatively and the interactive self-locking bracket of passive switching comprise bracket base and the one or more work wing, the wing of wherein working comprises the pedestal that is connected with bracket base, and be recessed to form downwards be used to the groove that holds arch wire by the pedestal center of top, the groove of all working wing is all on a groove axis.The pedestal of the single work wing is divided into first pedestal of groove axis one side and second pedestal of groove axis opposite side by groove, and a contrary flexure elastic collet is positioned on first pedestal.The contrary flexure elastic collet is divided into link, shell fragment and the free end that connects successively, shell fragment is the crooked laminated structure of rubber-like, wherein link is connected with the top of first pedestal, shell fragment is crossed the over top (i.e. the buccal labial surface of first pedestal) of first pedestal, roll to the groove direction, make the section of shell fragment be the semiclosed circle with big inner space that is similar to " C "; Free end bends to the second pedestal direction, and the medial surface of shell fragment and free end surround the inner space of contrary flexure elastic collet.Have on the shell fragment for the operation window that free end is applied active force, how the operator controls free end.

The free-ended end of contrary flexure elastic collet stretches out three sheet components to different directions, be respectively first card that covers the groove top, with first card at an angle and second card of digging to the second pedestal over top, with the catch of arch wire retaining outside the inner space of contrary flexure elastic collet.Under the relaxed state of contrary flexure elastic collet, the end of catch can join with the top of first pedestal or only stay narrow and small slit, first card and groove are configured for holding the archwire slot of arch wire jointly, and the side of second card can join with the top (i.e. the buccal labial surface of second pedestal) of second pedestal or only stay narrow and small slit.Groove top side wall at second pedestal has the draw-in groove parallel with the groove direction, and the end of second card can enter in the draw-in groove in the process of shell fragment by deformed state recovery relaxed state, makes draw-in groove and second card form the relation of fixing.

At the shell fragment of contrary flexure elastic collet under relaxed state, the archwire slot standard section size of interactive self-locking bracket is divided into two kinds usually, a kind of is more than or equal to 0.025 inch of 0.018 inch * (being called for short No. 18 groove), and another kind is more than or equal to 0.028 inch of 0.022 inch * (being called for short No. 22 groove).The maximum arch wire of putting into 0.025 inch of 0.018 inch * in the archwire slot of No. 18 grooves wherein, the maximum arch wire of putting into 0.028 inch of 0.022 inch * in the archwire slot of No. 22 grooves.

First card, second card and catch when interactive self-locking bracket uses on the free end can be positioned over different positions and realize active bracket and passive type bracket function respectively, and can switch mutually under external force between two kinds of user modes.At first when arch wire is placed on bracket lip buccal side groove top position, the operator applies to the power of groove bottom direction motion arch wire, this force transmission is to the contrary flexure elastic collet, shell fragment generation deformation, free end are moved to the groove bottom direction, first card, second card, the same moved further of catch, catch and first card enter in the inner space of contrary flexure elastic collet, second card moves until the original position of catch to the first card direction simultaneously, between the groove sidewall of second card and second pedestal, form the arch wire gateway, allow arch wire to enter archwire slot.

When arch wire has placed groove, because second card do not have the relation of fixing and do not have the external force effect with the first pedestal top, second card, first card, catch just move the position under the relaxed state during shell fragment resilience.After second card motion is in the draw-in groove, lead to free end is applied to the power of bracket lip buccal side direction, second card is spun off from draw-in groove, when second card is returned to the original position of the second pedestal buccal labial surface, the archwire slot that forms between first card and the groove has enough big space to hold the arch wire of corresponding size, and archwire slot can be to the arch wire positive force, and the frictional force between groove and the arch wire is low, arch wire is in passive stress, and this moment, bracket was the passive type bracket.

When arch wire has placed groove, because second card do not have the relation of fixing and do not have the external force effect with the first pedestal top, second card, first card, catch just move the position under the relaxed state during shell fragment resilience.After second card motion was in the draw-in groove, first card synchronously moved to groove top simultaneously, if shell fragment is not applied external force, then second card can rest in the draw-in groove, and the archwire slot space of first card and groove formation is compressed.When the insufficient space of archwire slot when holding the arch wire greater than the archwire slot size, produce active force between first card and the arch wire, archwire slot produces distortion, the angle of first card and second card is diminished, first card and second card are in non-relaxed state, first card produces counteracting force to arch wire, arch wire is subjected to continuing the soft thrust to the groove bottom from first card, this thrust can help tooth to realize rectifying effects such as torque, positive axis, and this moment, bracket was converted to active bracket by the passive type bracket.

As shown in Figure 1, the interactive self-locking bracket of present embodiment comprises a bracket base 1, the work wing 2 and contrary flexure elastic collet 3.The front of bracket base 1 is buccal labial surface 11, and the back side is adhesive surface 12, and buccal labial surface 11 is smooth flat, and gully shape texture is set on the adhesive surface 12, is conducive to binding agent and flows into, and strengthens the maintenance power of self-locking bracket and tooth bonding.The work wing 2 comprises the pedestal 21 that is connected with bracket base 1, and be recessed to form downwards be used to the groove 22 that holds arch wire by pedestal 21 center of top, pedestal 21 is divided into first pedestal 23 that is positioned at groove axis one side and second pedestal 24 that is positioned at groove axis opposite side by groove 22, furrow bank on first pedestal 23 is that the furrow bank on first furrow bank, 25, the second pedestals 24 is second furrow bank 26.The height of first pedestal 23 is short slightly than second pedestal 24, and contrary flexure elastic collet 3 is positioned on first pedestal 23.The top of second pedestal 24 stretches out, and forms the top that draw-in groove 28 that the fin 27, turn up is parallel to the groove axis is arranged on second furrow bank 26.

Contrary flexure elastic collet 3 is divided into link 31, shell fragment 32 and the free end 33 that connects successively, wherein link 31 is connected with first pedestal, 23 tops, link position is partial to first pedestal, 23 tops away from an end of groove 22, rolls to groove 22 directions so that shell fragment 32 is crossed first pedestal, 23 tops.The lateral surface profile of shell fragment 32 and the fin of second pedestal 24 27 are approximate, and the medial surface of shell fragment 32 and first pedestal, 23 tops surround the inner space 34 of contrary flexure elastic collet 3.Arrange on the end of free end 33 to first card 35, second card 36 and the catch 37 of different directions expenditure, first card 35 is between second card 36 and catch 37, angle between first card 35 and second card 36 is the acute angle less than 60 °, the rectangular or approximate right angle of the angle between first card 35 and the catch 37.Have on the shell fragment 32 for the operation window 38 that free end 33 is applied active force, the operator can apply strength by operation window 38 is put on operation tool (for example probe) top, makes free end 33 along moved by force direction.

When contrary flexure elastic collet 3 under relaxed state, the end of first card 35 can cover groove 22 tops, and join with second furrow bank 25 on second pedestal 24 or the gap less than 0.3mm, first card 35 and second furrow bank 25 join or close positions is lower than the lower limb of draw-in groove 28, first card 35 and groove 22 are configured for holding the archwire slot of arch wire jointly; The top of the end of second card 36 and second pedestal 24 join or the gap less than 0.3mm, second card 36 covers first card, 35 tops and also extends to second pedestal, 24 buccal labial surfaces top; The end of catch 37 can join with the top of first pedestal 23 or the gap less than 0.3mm, enter in the inner space 34 to avoid arch wire.

The preferred shell fragment 32 of present embodiment is that a thickness is the crooked laminated structure of 0.05 ~ 2mm.Groove 22 can be made into No. 22 grooves of cuboid that can maximum hold 0.018 * 0.025 inch～0.022 * 0.028 inch arch wire as required.The distance on the base of draw-in groove 28 bases and groove 22 is greater than 0.65mm.The work wing 2 and contrary flexure elastic collet 3 are made by elastic metallic, and elastic metallic is niti-shaped memorial alloy, Ni-Ti-based shape memory alloy, titanium-base alloy, cochrome or rustless steel.Bracket base 1, the work wing 2 and contrary flexure elastic collet 3 are one-body molded, and integral formation method is metal casting, metal powder injection molding, line cutting, laser engraving or laser cutting method.

Interactive self-locking bracket in use, as shown in Figure 2, when arch wire is placed on the bracket lip buccal side and is positioned at groove 22 top positions, the operator applies to the power of groove 22 bottoms motion arch wire, this force transmission makes free end 33 to the motion of groove 22 bottoms to shell fragment 32, and deformation takes place shell fragment 32.As shown in Figure 3, under the continuation effect of external force, second card 36 arrives the original position of catch 37, and arch wire gateway 4 is formed jointly at the top of second card, 36 lateral surface and second furrow bank 26, and arch wire can enter or deviates from groove 22 by arch wire gateway 4.

After arch wire enters groove 22, when interactive self-locking bracket uses as active bracket, as shown in Figure 4, when arch wire enters in the groove 22, under external force, after the end of shell fragment 32 second card 36 in reseting procedure enters in the draw-in groove 28, if do not continue to apply external force, then second card, 36 cards can be stuck in the draw-in groove 28, shell fragment 32 still is in deformed state, arch wire is locked in the archwire slot, and the archwire slot space that first card 35, catch 37 and groove 22 form reduces, and the arch wire that first card 35 is opposite in the archwire slot initiatively applies the power of rescuing.

After arch wire enters groove 22, when interactive self-locking bracket uses as the passive type bracket, as shown in Figure 5, when arch wire enters in the groove 22, under external force, after the end of shell fragment 32 second card 36 in reseting procedure enters in the draw-in groove 28, putting into operation window 38 with instrument (for example probe) applies to the power of bracket lip buccal side direction free end 33, second card 36 is spun off from draw-in groove 28, shell fragment 32 recovers relaxed state, namely second card 36 covers first card, 35 tops and extends to the top of second pedestal 24, and arch wire also is locked in the archwire slot, and the arch wire that first card 35 is opposite in the archwire slot does not initiatively apply the power of rescuing.

Should be pointed out that the above specific embodiment can make those skilled in the art more fully understand this utility model, but limit this utility model never in any form.Therefore; although this description has been described in detail this utility model with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can make amendment or be equal to replacement this utility model; in a word, all do not break away from technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the middle of the protection domain of this utility model patent.

Claims

One kind can be initiatively and the interactive self-locking bracket of passive switching, the one or more work wing of buccal labial surface that comprises a bracket base and be arranged on described bracket base, the described work wing comprises the pedestal that is connected with bracket base, described pedestal middle part is recessed to form groove downwards, and all described grooves are all on a groove axis; Described pedestal is divided into first pedestal and second pedestal by described groove axis; It is characterized in that: the height of described first pedestal is lower than described second pedestal, the described first pedestal top arranges a contrary flexure elastic collet, described contrary flexure elastic collet comprises link, shell fragment and the free end that connects successively, described link is connected with described first pedestal, described shell fragment is the elastic bending sheet, and described free end is suspended from the buccal labial surface top of the described work wing; First card, second card and catch are set on the described free end, and when described shell fragment was relaxed state, described first card, catch and groove constituted archwire slot jointly; The furrow bank top that described groove is positioned on described second pedestal arranges the draw-in groove that is parallel to holding of described groove axis of described second card.
As claimed in claim 1 a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: when described second card was in the position of described catch, the big I in inner space that the medial surface of described shell fragment and the described first pedestal top surround was held described first card and catch.
As claimed in claim 1 or 2 a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: when described shell fragment is relaxed state, the top of the end of described catch and described first pedestal joins or only stays narrow and small slit, the end of described first card and described groove are positioned at furrow bank top on described second pedestal and join or only stay narrow and small slit, and the top of the downside of described second card and described second pedestal joins or only stays narrow and small slit.
As claimed in claim 3 a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: described narrow and small slit is less than 0.3mm.
As claim 1 or 2 or 4 described a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: the angle between described card and the catch is right angle or approximate right angle, the angle between described first card and second card is acute angle.
As claimed in claim 5 a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: described acute angle is less than 60 degree.
7. as claim 1 or 2 or 4 or 6 described a kind of can it is characterized in that: an operation window is set on the described shell fragment at the interactive self-locking bracket of active and passive switching.
As claim 1 or 2 or 4 or 6 described a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: described shell fragment thickness is 0.05 ~ 2mm.
As claim 1 or 2 or 4 or 6 described a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: the described work wing and contrary flexure elastic collet are made by elastic metallic.
As claimed in claim 9 a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: described elastic metallic is niti-shaped memorial alloy, Ni-Ti-based shape memory alloy, titanium-base alloy, cochrome or rustless steel.
11. as claim 1 or 2 or 4 or 6 or 10 described a kind of can be initiatively and the interactive self-locking bracket of passive switching, it is characterized in that: described bracket base, the work wing and contrary flexure elastic collet are one-body molded, and described integrated method is metal casting, metal powder injection molding, line cutting, laser engraving or laser cutting method.