阅读说明：本技术 一种自锁正畸托槽及其制备方法 (Self-locking orthodontic bracket and preparation method thereof ) 是由 李响 岳术俊 史春生 许奎雪 李宁 于 2021-09-26 设计创作，主要内容包括：本发明提供一种自锁正畸托槽,包括：底板,用于同牙冠表面弧度适配并粘接于其表面；主体,其上设有用于容纳正畸丝并传导正畸丝向牙冠表面施加矫治力的槽沟,以及用于置入卡件的卡孔；所述底板上背离牙冠的一面焊接于所述主体的底端面；锁片,其滑动卡合于所述主体的上端面,以与其上的所述卡件滑动连接；其中,所述槽沟开口方向向上。其优点是：可有效避免锁片与主体之间锁合不牢固的缺陷,其自锁功能强,由于其结构特性,使得在使用过程中,食用较为坚硬食物时也不会发生自动解锁情况的发生,从而避免因锁片脱离而造成人体伤害的情况发生,本发明保护的该结构在保证其功能性的同时,提高了其安全性、稳定性。(The invention provides a self-ligating orthodontic bracket, comprising: the bottom plate is matched with the radian of the surface of the dental crown and is adhered to the surface of the dental crown; the main body is provided with a groove for accommodating the orthodontic wire and conducting the orthodontic wire to apply correcting force to the surface of the dental crown and a clamping hole for placing the clamping piece; one surface of the bottom plate, which is far away from the dental crown, is welded on the bottom end surface of the main body; the locking piece is clamped on the upper end surface of the main body in a sliding manner so as to be connected with the clamping piece on the locking piece in a sliding manner; wherein the opening direction of the groove is upward. The advantages are that: the structure can effectively avoid the defect of insecure locking between the locking plate and the main body, has strong self-locking function, and can avoid the occurrence of automatic unlocking when eating hard food due to the structural characteristics, thereby avoiding the occurrence of human body injury caused by the separation of the locking plate.)

1. A self-ligating orthodontic bracket, comprising: comprises that

The base plate (100) is matched with the radian of the surface of the dental crown and is adhered to the surface of the dental crown;

the orthodontic tooth wire clamp comprises a main body (200) and a clamping hole (202), wherein the main body is provided with a groove (201) for accommodating an orthodontic wire and conducting the orthodontic wire to apply a correcting force to the surface of a dental crown, and the clamping hole is used for placing a clamping piece (300); one surface of the bottom plate (100) which is far away from the dental crown is welded on the bottom end surface of the main body (200);

a locking piece (400) which is slidably engaged with the upper end surface of the main body (200) to be slidably connected with the clip piece (300) thereon;

wherein, the opening direction of the groove (201) is upward.

2. The self-ligating orthodontic bracket of claim 1, wherein: a groove (403) with a downward opening and used for being in sliding connection with the clamping piece (300) is formed in one side, facing the main body (200), of the locking piece (400), and a fixing piece (404) is symmetrically arranged on the left side and the right side in the groove (403), so that the clamping piece (300) is in sliding abutting joint with the side wall of the fixing piece (404);

the fixing piece (404) is composed of a limiting portion (406) with an arc-shaped concave surface (405) and a sliding portion (407) integrally formed with the limiting portion, the width between two opposite sides of the sliding portion (407) is of a gradual change structure from narrow to wide, and the narrow end of the sliding portion is connected with the limiting portion (406), so that the clamping piece (300) is clamped with the main body (200) when the arc-shaped concave surface (405) is abutted, and when external force acts on the locking piece (400) to enable the locking piece (400) to be far away from the groove (201), the clamping piece (300) is pushed to the sliding portion (407) from the limiting portion (406) to unlock the locking piece (400) and the main body (200).

3. The self-ligating orthodontic bracket of claim 1, wherein: the left side and the right side of the locking plate (400) are symmetrically provided with sliding blocks (408) which are used for being in sliding connection with the main body (200).

4. The self-ligating orthodontic bracket of claim 3, wherein: the main part (200) face one end of locking plate (400) be equipped with sliding platform (203) of locking plate (400) slip adaptation, sliding platform (203) by continuous uncap groove (204) in order, slot (201), sliding tray (205) constitute, the bottom face of uncap groove (204) with the bottom face parallel and level of sliding tray (205) and through the connection of slot (201), the bottom face of slot (201) is located uncap groove (204) with the bottom face of sliding tray (205) is below for orthodontic wire is arranged in behind slot (201) through locking plate (400) with main part (200) locking is fixed, and the portion of pulling (409) of locking plate (400) is located uncap groove (204);

the sliding platform (203) is provided with a sliding rail (206) matched with the sliding block (408).

5. The self-ligating orthodontic bracket of claim 4, wherein: the sliding rails (206) are arranged on the sliding grooves (205), and the clamping holes (202) are located between the two sliding rails (206).

6. The self-ligating orthodontic bracket of claim 4, wherein: the upper part of the surface of the pulling part (409) opposite to the inner side wall of the cover opening groove (204) is an arc-shaped surface.

7. The method for preparing self-ligating orthodontic brackets of any one of claims 1-6, wherein the method comprises the steps of: comprises the following steps

S1, after preparing a locking plate (400), a main body (200) and a bottom plate (100) by injecting metal powder into a die, inserting the locking plate (400) into the main body (200), inserting a clamping piece (300) into a clamping hole (202) of the main body (200) from the bottom of the main body (200), and ejecting the top of the clamping piece (300) into the locking plate (400), wherein the assembled product is named as a product A for later use;

s2, placing the product A obtained in the step A and the bottom plate (100) in a welding tool piece (500) for welding to fix the relative position of the bottom plate (100) and the main body (200) and further complete the preparation of the self-locking orthodontic bracket.

8. The method of claim 7, wherein: the welding tool piece (500) comprises a cover plate (502) provided with a bearing hole (501), a positioning block (503) used for accommodating a product A, and a supporting block (505) with an inner core (504), wherein the cover plate (502) is hinged to one side of the positioning block (503), one end of the supporting block (505) extends into a through hole (506) of the positioning block (503) and is flush with the top end face of the positioning block (503), the upper end face of the inner core (504) is positioned below the upper end face of the supporting block (505), and the configuration of the upper end face of the inner core (504) is matched with the configuration of one end of the product A, which is far away from the bottom plate (100), so that the inner core (504) and the bottom plate (100) of the product A, which are arranged in the supporting block (505), are arranged on the bearing hole (501), and after the cover plate (502) is covered, the bottom plate (100) on the cover plate (502) corresponds to the product A on the fixer, the relative position of the bottom plate (100) and the product A is convenient to fix and then the welding is carried out;

the depth of the bearing hole (501) is equal to the thickness of the bottom plate (100), and the shape of the bearing hole (501) is matched with that of the bottom plate (100); the inner core (504) is the electrode end and when welded, the other electrode end is applied to the cover sheet (502).

9. The method of claim 8, wherein: the positioning block (503) is provided with a positioning pin (507), the cover plate (502) is provided with a pin hole (508) matched with the positioning pin (507), so that when the cover plate (502) covers the positioning block (503), the positioning pin (507) is inserted into the pin hole (508) to fix the fixing block and the cover plate (502).

10. The self-ligating orthodontic bracket of claim 1, wherein: the clamping piece (300) is made of nickel-titanium memory alloy materials.

Technical Field

The invention relates to the technical field of dental orthodontics, in particular to a self-locking orthodontic bracket and a preparation method thereof.

Background

The orthodontic bracket is an important part of the fixed orthodontic technology, is directly bonded on the surface of the dental crown by using adhesive, and mainly has the main function of fixing an arch wire, and the arch wire applies various types of orthodontic force to the tooth through the orthodontic bracket so as to control the three-dimensional movement of the tooth and achieve the aim of orthodontic correction.

And the orthodontic bracket with the existing structure is easy to clamp and push the locking plate on the orthodontic bracket to push the locking plate away in the chewing process due to the structural defects of the orthodontic bracket, so that the locking plate opens the orthodontic wire to go out, even the locking plate falls and is mistakenly swallowed, and the orthodontic bracket causes harm to a human body.

The orthodontic bracket is a miniature part used in the oral cavity, and welding of all parts is very difficult in the preparation process, so that the structure of the welding tool is very important, and the welding tool is an important index of the preparation process, the welding quality, the production efficiency and the like.

Disclosure of Invention

The invention provides a self-locking orthodontic bracket and a preparation method thereof, aiming at overcoming at least one technical defect, reducing design and process cost and facilitating accurate installation.

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention protects in a first aspect a self-ligating orthodontic bracket comprising: the bottom plate is matched with the radian of the surface of the dental crown and is adhered to the surface of the dental crown;

the main body is provided with a groove for accommodating the orthodontic wire and conducting the orthodontic wire to apply correcting force to the surface of the dental crown and a clamping hole for placing the clamping piece; one surface of the bottom plate, which is far away from the dental crown, is welded on the bottom end surface of the main body;

the locking piece is clamped on the upper end surface of the main body in a sliding manner so as to be connected with the clamping piece on the locking piece in a sliding manner;

wherein the opening direction of the groove is upward.

Preferably, a groove with a downward opening for sliding connection with the clamping piece is formed in one side of the locking plate facing the main body, and a fixing piece is symmetrically arranged on the left side and the right side of the groove, so that the clamping piece is in sliding butt joint with the side wall of the fixing piece;

the fixing piece comprises a limiting portion with an arc-shaped concave surface and a sliding portion integrally formed with the limiting portion, the width between one side, opposite to the sliding portion, of the sliding portion is of a gradual changing structure from narrow to wide, one end of the narrow portion is connected with the limiting portion, the clamping piece is abutted to the arc-shaped concave surface, the locking piece is clamped with the main body, when external force acts on the locking piece to enable the locking piece to be far away from the groove, the clamping piece is pushed to the sliding portion through the limiting portion to achieve unlocking of the locking piece and the main body.

Preferably, the left side and the right side of the locking plate are symmetrically provided with sliding blocks used for being in sliding connection with the main body.

Preferably, a sliding platform which is in sliding fit with the locking plate is arranged at one end, facing the locking plate, of the main body, the sliding platform is composed of a cover opening groove, the groove and the sliding groove which are sequentially connected, the bottom end face of the cover opening groove is flush with the bottom end face of the sliding groove and is connected with the bottom end face of the sliding groove through the groove, the bottom end face of the groove is located below the bottom end faces of the cover opening groove and the sliding groove, so that the orthodontic wire is locked and fixed with the main body through the locking plate after being placed in the groove, and the pulling part of the locking plate is located in the cover opening groove;

and the sliding platform is provided with a sliding rail matched with the sliding block.

Preferably, the slide rail is arranged on the slide groove, and the clamping hole is positioned between the two slide rails.

Preferably, the upper part of the face, opposite to the inner side wall of the cover opening groove, of the pulling part is an arc-shaped face.

Preferably, the clip is made of a nickel-titanium memory alloy material.

The second aspect of the invention protects the preparation method of the self-locking orthodontic bracket in the first aspect, which comprises the following steps:

s1, after metal powder is injected into a die to prepare a locking plate, a main body and a bottom plate, the locking plate is inserted into the main body, a clamping piece is inserted into a clamping hole of the main body from the bottom of the main body, the top of the clamping piece is jacked into the locking plate, and the product assembled at the moment is named as a product A for later use;

s2, placing the product A obtained in the step A and the bottom plate in a welding tool piece for welding to fix the relative position of the bottom plate and the main body, and further completing the preparation of the self-locking orthodontic bracket.

Preferably, the welding tool piece comprises a cover plate provided with a bearing hole, a positioning block used for accommodating a product A, and a supporting block with an inner core, wherein the cover plate is hinged to one side of the positioning block, one end of the supporting block extends into the through hole of the positioning block and is flush with the top end face of the positioning block, the upper end face of the inner core is positioned below the upper end face of the supporting block, and the configuration of the upper end face of the inner core is matched with the configuration of one end of the product A, which deviates from the bottom plate, so that the inner core and the bottom plate, which are positioned in the supporting block, of the product A are positioned on the bearing hole, and after the cover plate is covered, the bottom plate on the cover plate corresponds to the product A on the fixer, and the welding is conveniently carried out after the relative positions of the bottom plate and the product A are fixed;

the depth of the bearing hole is equal to the thickness of the bottom plate, and the shape of the bearing hole is matched with that of the bottom plate; the inner core is one end of an electrode, and the other end of the electrode is applied to the cover plate when welding.

Preferably, the positioning block is provided with a positioning pin, and the cover plate is provided with a pin hole matched with the positioning pin, so that when the cover plate covers the positioning block, the positioning pin is inserted into the pin hole to fix the fixing block and the cover plate.

The invention relates to a self-locking orthodontic bracket and a preparation method thereof, which has the advantages that:

1. the structural design of the self-locking orthodontic bracket can effectively avoid the defect of infirm locking between the locking plate and the main body, has strong self-locking function, and can avoid the occurrence of automatic unlocking when eating hard food due to the structural characteristics, thereby avoiding the occurrence of human body injury caused by the separation of the locking plate;

2. the structural design of the groove on the locking plate effectively realizes the self-locking function between the locking plate and the clamping piece and between the locking plate and the main body, and the locking plate has a simple structure and is convenient to operate;

3. in the process of preparing the orthodontic bracket, the structural design of the welding tool piece ensures that the time required for structural alignment in the welding process of the tool is short, the operation is convenient, the condition that parts fall out is avoided, and the orthodontic bracket is suitable for batch production and has high efficiency.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic perspective view of a self-ligating orthodontic bracket of the invention;

FIG. 2 is a schematic structural view of a self-ligating orthodontic bracket of the present invention without a locking tab;

FIG. 3 is a schematic structural view of FIG. 2 without a latch;

fig. 4 and 5 are schematic structural views of different surfaces of the locking plate respectively;

FIG. 6 is a schematic view of a welding assembly;

FIG. 7 is a schematic view of the structure of the cover plate;

FIG. 8 is a schematic view of a positioning block;

FIG. 9 is a schematic view of the support block configuration;

FIG. 10 is a schematic structural view of the inner core;

wherein:

a base plate 100;

the device comprises a main body 200, a groove 201, a clamping hole 202, a sliding platform 203, an uncovering groove 204, a sliding groove 205 and a sliding rail 206;

a card member 300;

the locking plate comprises a locking plate 400, an arc surface 401, a plane 402, a groove 403, a fixing piece 404, an arc concave surface 405, a limiting part 406, a sliding part 407, a sliding block 408, a pulling part 409 and an arc surface 410;

the welding tool comprises a welding tool part 500, a bearing hole 501, a cover plate 502, a positioning block 503, an inner core 504, a supporting block 505, a through hole 506, a positioning pin 507, a pin hole 508, a first strip-shaped hole 509, a second strip-shaped hole 510, a third strip-shaped hole 511, an arc-shaped hole 512 and a handle 513.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

Example one

According to the illustration of fig. 1, there is provided a self-ligating orthodontic bracket comprising:

a base plate 100 for fitting to the surface of a dental crown in a curvature and adhering thereto;

the main body 200 is provided with a groove 201 for accommodating an orthodontic wire and conducting the orthodontic wire to apply an orthodontic force to the surface of a crown, and a clamping hole 202 for placing the clamping piece 300; the surface of the bottom plate 100 facing away from the dental crown is welded to the bottom end surface of the main body 200;

a locking piece 400 slidably engaged with an upper end surface of the main body 200 to be slidably coupled to the clip 300 thereon;

wherein the opening direction of the groove 201 is upward.

In a specific using process, the locking plate 400 deviates from the main body 200, one side of which is composed of an arc surface 401 and a plane 402 integrally formed with the arc surface 401, the plane 402 is located at one side far away from the clamping piece 300, and the arc surface 401 is located at one side close to the clamping piece 300, so that the using comfort degree is improved, and the cleaning is facilitated. The clip 300 is made of nitinol, preferably has two cylindrical structures, and is disposed in the corresponding clip holes 202 of the main body 200 at intervals side by side, and the clip holes 202 penetrate through the main body 200, so that the clip 300 can be fixed in the locking piece 400 by being abutted after penetrating from the bottom to the top of the main body 200 during the assembly process.

The preparation and working principle of the technical scheme is as follows:

after preparing the bottom plate 100, the main body 200, the locking plate 400 and the clip 300 through a mold, placing the locking plate 400 on the main body 200, penetrating the clip 300 from a bottom through hole of the main body 200 to the upper end surface thereof to abut against the lower end surface of the locking plate 400 to complete self-locking, and welding the bottom plate 100 on one end of the main body 200 departing from the locking plate 400 to prepare the self-locking orthodontic bracket of the invention;

then, the orthodontic bracket is bonded to the surface of the dental crown by using an adhesive, the locking plate 400 and the main body 200 are unlocked, the locking plate 400 slides on the main body 200 after an orthodontic wire is placed, so that the clip 300 is clamped between the locking plate 400 and the main body 200 under the double effects of an external thrust and the elastic deformation of the clip, and the self-locking process of the locking plate 400 and the main body 200 is completed.

The technical effect of the technical scheme is as follows:

the structure is simple, the operation is convenient, the safety and the stability of the orthodontic bracket are improved while the function of the orthodontic bracket is ensured, and the locking plate 400 is prevented from being separated from being mistakenly swallowed to cause injury to a human body.

Example two

According to the self-locking orthodontic bracket of the first embodiment, as shown in fig. 4, a downward opening groove 403 is formed in one side of the locking plate 400 facing the main body 200 and is used for being slidably connected with the clip 300, and a fixing member 404 is symmetrically arranged on the left side and the right side in the groove 403, so that the clip 300 is slidably abutted against the side wall of the fixing member 404;

the fixing piece 404 is composed of a limiting portion 406 with an arc-shaped concave surface 405 and a sliding portion 407 integrally formed with the limiting portion, the width between two opposite sides of the sliding portion 407 is a gradually changing configuration from narrow to wide, and the narrow end is connected with the limiting portion 406, so that when the clip 300 abuts against the arc-shaped concave surface 405, the locking plate 400 is engaged with the main body 200, when external force acts on the locking plate 400 to make the locking plate 400 far away from the groove 201, the clip 300 is pushed to the sliding portion 407 from the limiting portion 406 to unlock the locking plate 400 and the main body 200, and at this time, the placing or taking out operation of the orthodontic wire is facilitated.

The technical effect of the technical scheme is as follows:

the clip 300 can be limited and fixed by a specific structural design in the groove 403, for example, the limiting part 406, so as to prevent the clip 300 from falling out of the groove, thereby ensuring the stability of orthodontic bracket locking, when a pushing force is applied to the locking plate 400, the locking plate 400 slides on the main body 200, so that the clip 300 is deformed and pushed into the sliding part 407 (i.e., the surface opposite to the two sliding parts 407 abuts against and slides), and the locking mode is convenient and has strong stability.

EXAMPLE III

According to the self-locking orthodontic bracket of the third embodiment, as shown in fig. 5, the left side and the right side of the locking plate 400 are symmetrically provided with the sliding blocks 408 for sliding connection with the main body 200.

More specifically, as shown in fig. 2 and 3, a sliding platform 203 in sliding fit with the locking plate 400 is disposed on one end of the main body 200 facing the locking plate 400, the sliding platform 203 is composed of an uncovering groove 204, the groove 201 and a sliding groove 205 which are connected in sequence, a bottom end surface of the uncovering groove 204 is flush with a bottom end surface of the sliding groove 205 and is connected through the groove 201, the bottom end surface of the groove 201 is located below the bottom end surfaces of the uncovering groove 204 and the sliding groove 205, so that an orthodontic wire is locked and fixed with the main body 200 through the locking plate 400 after being placed in the groove 201, and a pulling portion 409 of the locking plate 400 is located in the uncovering groove 204;

the sliding platform 203 is provided with a sliding rail 206 adapted to the sliding block 408, and the sliding rail 206 and the sliding platform 203 are located on the same plane.

The technical effect of the technical scheme is as follows:

the structural design of the sliding block 408 and the sliding platform 203 ensures that the locking plate 400 and the main body 200 have good sliding performance and good stability; more specifically, when the locking plate 400 is locked with the main body 200, the bottom end of the locking plate 400 is connected with the uncovering groove 204 and the sliding groove 205 at the same time, and the groove 201 is located at the lower part of the locking plate 400, so that the orthodontic bracket does not affect the orthodontic force applied to teeth by an arch wire through the orthodontic bracket in the using process, and the purpose of orthodontic correction is achieved.

Example four

According to the self-ligating orthodontic bracket of the fourth embodiment, as shown in fig. 1 to 3, the slide rails 206 are arranged on the slide grooves 205, and the fastening holes 202 are positioned between the two slide rails 206.

The technical effect of the technical scheme is as follows:

the setting position of slide rail 206 has improved the motion performance between locking plate 400 and the main part 200, when locking state, improves its locking degree, when the unblock, because of the thrust is in its one end that deviates from for need use great thrust just can the unblock, thereby improved the stability in the use, reduce the unexpected unblock that causes because of food is chewed.

EXAMPLE five

According to the self-locking orthodontic bracket of the fourth embodiment, as shown in fig. 5, the upper part of the surface of the pulling part 409, which is opposite to the inner side wall of the cover opening groove 204, is an arc-shaped surface 410.

The technical effect of the technical scheme is as follows:

the setting of this arcwall face improves use comfort, reduces uncomfortable and feels.

EXAMPLE six

The method for preparing the self-ligating orthodontic bracket according to the first embodiment to the fourth embodiment comprises the following steps:

s1, after preparing the locking piece 400, the main body 200 and the bottom plate 100 by injecting metal powder in a mold, inserting the locking piece 400 into the main body 200, inserting the card element 300 into the card hole 202 of the main body 200 from the bottom of the main body 200, and ejecting the top of the card element 300 into the locking piece 400, wherein the product assembled at the moment is named as a product A for standby;

s2, placing the product A obtained in the step A and the bottom plate 100 in a welding tool 500 for welding to fix the relative position of the bottom plate 100 and the main body 200, and further completing the preparation of the self-locking orthodontic bracket.

As shown in fig. 6-10, the welding tool 500 includes a cover 502 having a bearing hole 501, a positioning block 503 for accommodating a product a, and a supporting block 505 with an inner core 504, where the cover 502 is hinged to one side of the positioning block 503, one end of the supporting block 505 extends into a through hole 506 of the positioning block 503 and is flush with a top end face of the positioning block 503, an upper end face of the inner core 504 is located below an upper end face of the supporting block 505, and a configuration of the upper end face of the inner core 504 is adapted to a configuration of an end of the product a away from the base plate 100, so that the inner core 504 and the base plate 100 with the product a placed in the supporting block 505 are placed on the bearing hole 501, and after the cover 502 is closed, the base plate 100 on the cover 502 corresponds to the product a on the positioning block 503, which facilitates welding after the base plate 100 is fixed to the product a;

the depth of the bearing hole 501 is equal to the thickness of the bottom plate 100, and the shape of the bearing hole 501 is matched with that of the bottom plate 100; the inner core 504 is the electrode end and when welded, the other end of the electrode is applied to the cover plate 502.

The technical effect of the technical scheme is as follows:

by combining the orthodontic bracket structure protected by the first aspect of the invention, the mass production of orthodontic brackets can be realized by the preparation method of the technical scheme; specifically, the specific structural design of the welding tool 500 is designed by matching with the orthodontic bracket structure protected by the first aspect of the present invention, so that the product a and the base plate 100 are aligned and fixed quickly, and the inner core 504 is an electrode at one end, and the other electrode end is applied on the cover plate 502 to realize quick welding.

EXAMPLE seven

According to the sixth preparation method of the embodiment, as shown in fig. 6 to 10, the positioning block 503 is provided with a positioning pin 507, and the cover plate 502 is provided with a pin hole 508 adapted to the positioning pin 507, so that when the cover plate 502 is covered on the positioning block 503, the positioning pin 507 is inserted into the pin hole 508 to fix the positioning block 503 and the cover plate 502.

The technical effect of the technical scheme is as follows:

the cover plate 502 and the positioning block 503 are aligned and fixed accurately, so that the locking plate 400 is connected with the product A effectively and correspondingly, welding is easier, the production efficiency and the product qualification rate are improved greatly, and batch production is realized.

The cover plate 502 is further provided with a first strip-shaped hole 509 communicated with the pin hole 508 and a second strip-shaped hole 510 communicated with the bearing hole 501, the other ends of the first strip-shaped hole 509 and the second strip-shaped hole 510 extend along the edge of the cover plate 502, and the first strip-shaped hole 509 and the second strip-shaped hole 510 are vertically arranged and are not connected with each other, so that the cover plate 502 and the positioning block 503 can be conveniently and rapidly aligned and covered, time is saved, and efficiency is improved;

in order to increase the welding precision, the supporting block 505 and the positioning block 503 are in interference fit during machining and matching. The supporting block 505 is provided with a third strip-shaped hole 511 communicated with the center thereof along the length direction, and if the third strip-shaped hole 511 is not assembled or is difficult to assemble, the third strip-shaped hole is difficult to disassemble even in the assembly. The third strip-shaped hole 511 is reserved to enable the third strip-shaped hole to have certain expansion elasticity, and assembly is facilitated. And the assembly is tight, the welding error is reduced, and the supporting block 505 is convenient to disassemble.

The cross section of the through hole 506 is square, four corners of the square are respectively provided with an arc hole 512 which is communicated with the square for connection, the arc holes 502 are communicated along the height direction of the positioning block 503, so that after the upper part of the supporting block 505 extends into the through hole 506, gaps are reserved between the four corners of the supporting block 505 and the arc holes 512, the four corners of the through hole 506 are enlarged by the arc holes 512, the fault tolerance rate can be increased, and the supporting block 505 cannot be assembled in the positioning block 503 due to machining errors is avoided.

The cover plate 502 is provided with a handle 513 with an included angle with the cover plate, so that the cover plate 502 is covered by the handle 513, and the operation is convenient.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.