Self-locking bracket with function of preventing cover plate from being opened by mistake

Abstract

This invention relates to a self-locking bracket with a function to prevent accidental opening of the cover plate, comprising a base plate, a bracket body, a cover plate, a limiting member, and a spring. When the cover plate needs to be opened, it is pressed towards the second working wing. Under pressure, the cover plate compresses the spring sleeved outside the limiting member. As the cover plate moves, its latches facing the first working wing gradually disengage from the slots on the first working wing, unlocking the cover. Then, the cover plate is pushed away from the first working wing to fully open it, exposing the archwire groove. When the cover plate needs to be closed, it is first pressed towards the second working wing to compress the spring, then pushed towards the first working wing, aligning the latches on the cover plate with and inserting them into the slots on the first working wing. After releasing the cover plate, the compressed spring, under restoring force, pushes the cover plate away from the second working wing, causing the latches to engage tightly with the slots, achieving automatic locking of the cover plate.

Description

Technical Field

[0001] This invention relates to the field of self-locking bracket technology, and in particular to a self-locking bracket with the function of preventing accidental opening of the cover plate. Background Technology

[0002] Self-ligating brackets, widely used fixed orthodontic appliances in modern orthodontic treatment, utilize built-in elastic posts or springs to quickly lock and release the archwire. This eliminates the need for ligatures or elastic bands required by traditional brackets, significantly reducing friction between the archwire and bracket. This facilitates efficient tooth movement, extends the intervals between appointments, improves patient comfort, and enhances oral hygiene maintenance. With advancements in orthodontic technology, self-ligating brackets have gradually replaced some traditional brackets in clinical practice, becoming one of the mainstream orthodontic appliances.

[0003] However, the opening mechanism of existing self-ligating brackets is generally designed to be pushed or pried open directly by conventional orthodontic instruments such as probes. While this improves ease of operation, it also introduces the risk of accidental opening of the cover during clinical procedures or daily use by patients. For example, during eating, brushing teeth, or when subjected to external impact, the cover may slip open due to unintentional contact, leading to archwire dislodgement, interruption of orthodontic force, and even affecting the overall treatment progress. Therefore, there is an urgent need for a structurally improved self-ligating bracket that can effectively prevent accidental opening of the cover while maintaining ease of operation, thereby improving the stability and reliability of the orthodontic process. Summary of the Invention

[0004] Therefore, it is necessary to provide a self-locking bracket that can effectively prevent the cover from being opened accidentally, in order to address the above-mentioned technical problems.

[0005] A self-locking bracket with a function to prevent accidental opening of the cover plate includes a base plate, a bracket body, a cover plate, a limiting member, and a spring. The bracket body is disposed on the base plate and has a bow wire groove that divides the bracket body into a first working wing and a second working wing. The cover plate is slidably disposed on the second working wing and has a mounting hole. The cover plate has a limiting groove on one side facing the second working wing. One end of the limiting member extends into the mounting hole, and the other end extends into the limiting groove. The spring is sleeved on the limiting member, with one end extending into the mounting hole and the other end not extending into the limiting groove. The other end of the spring is pressed against the cover plate. A locking groove is provided on one side of the first working wing facing the second working wing, and a buckle protrudes from one side of the cover plate facing the first working wing. The buckle can be locked into the locking groove to prevent the cover plate from being opened accidentally.

[0006] When it is necessary to open the cover, press the cover towards the second working wing, the cover compresses the spring, the buckle unlocks from the slot, and push the cover away from the first working wing to open the cover;

[0007] When it is necessary to close the cover, press the cover towards the second working wing. The cover compresses the spring and pushes the cover towards the first working wing until the buckle extends into the slot. Release the cover and the cover moves away from the second working wing under the restoring force of the spring. The buckle engages with the slot to lock.

[0008] In one embodiment, the slot has a concave structure, and the buckle has a convex structure, the convex structure cooperating with the concave structure.

[0009] In one embodiment, the limiting member includes a sleeve and a limiting post. The limiting post passes through the sleeve, with one end of the limiting post and one end of the sleeve extending into the mounting hole. The other end of the limiting post extends into the limiting groove, while the other end of the sleeve does not extend into the limiting groove. The spring is sleeved outside the sleeve.

[0010] In one embodiment, the limiting post and the sleeve are separate structures.

[0011] In one embodiment, the limiting post and the sleeve are integrally formed.

[0012] In one embodiment, the mounting hole is a stepped hole, the diameter of the bottom of the mounting hole is smaller than the size of the top of the mounting hole, one end of the spring extends into the top of the mounting hole, and one end of the limiting member extends into the bottom of the mounting hole.

[0013] In one embodiment, a slide rail is provided on the second working wing, and a slide rail is provided on the cover plate. The cover plate is slidably disposed on the second working wing by cooperating with the slide rail and the slide rail.

[0014] In one embodiment, the slide rails are disposed on opposite sides of the cover plate.

[0015] In one embodiment, the slide rail is disposed on the side of the cover plate facing the second working wing, and the slide rail is located on opposite sides of the limiting groove.

[0016] In one embodiment, the top of the cover plate is provided with a positioning groove.

[0017] The aforementioned self-locking bracket with the function of preventing accidental opening of the cover plate has at least the following advantages:

[0018] The operation of the self-locking bracket is divided into two stages: opening and closing. To open the cover, press it towards the second working wing. The cover compresses the spring sleeved outside the limiting member. As the cover moves, the latches facing the first working wing gradually disengage from the slots on the first working wing, unlocking it. Then, push the cover away from the first working wing to fully open it and expose the archwire groove. To close the cover, first press it towards the second working wing to compress the spring, then push it towards the first working wing, aligning the latches on the cover with the slots on the first working wing. After releasing the cover, the compressed spring, under restoring force, pushes the cover away from the second working wing, ensuring a tight fit between the latches and the slots, thus automatically locking the cover.

[0019] The beneficial effects of the aforementioned self-locking bracket are mainly reflected in the following three aspects: First, it has a trigger-type opening and anti-accidental opening function. The cover plate can only be opened through a specific "press-slide" operation. The cooperation structure of the buckle and the slot can effectively prevent the cover plate from being accidentally opened due to daily chewing or external impact, ensuring the stability of the archwire during orthodontic treatment. Second, the spring has excellent durability. The spring is sleeved outside the limiting component and only undergoes axial compression deformation during operation, without lateral wear. Compared with elastic components that are prone to deformation and wear, it has a longer service life and can maintain a stable locking force for a long time. Third, the entire cover plate moves downward by pressing. The structure is simple, easy to manufacture, and the assembly relationship is clear. It does not require complex processing technology, which reduces the difficulty and cost of production and facilitates large-scale promotion and use. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a self-locking bracket with a function to prevent accidental opening of the cover plate in one embodiment;

[0023] Figure 2 for Figure 1 The self-locking bracket shown omits the cover plate;

[0024] Figure 3 for Figure 1 The self-locking bracket shown omits the cover plate, limiting component, and spring.

[0025] Figure 4 for Figure 1 A schematic diagram of the cover plate in the middle;

[0026] Figure 5 for Figure 4 The bottom view of the cover plate shown;

[0027] Figure 6 This is an exploded view of the limiting component and the spring;

[0028] Figure 7 for Figure 1 A cross-sectional view of the self-locking bracket shown;

[0029] Figures 8 to 10 for Figure 1 The diagram shows the cover of the self-locking bracket in the closed state and the open state.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Self-locking bracket; 100. Base plate; 200. Bracket body; 300. Cover plate; 400. Limiting component; 500. Spring; 210. Bow wire groove; 220. First working wing; 230. Second working wing; 310. Limiting groove; 240. Slide rail; 320. Slide rail; 250. Mounting hole; 410. Sleeve; 420. Limiting post; 221. Slot; 330. Buckle; 222. Recessed structure; 331. Protruding structure; 340. Positioning groove. Detailed Implementation

[0032] Unless otherwise stated, the following structural description requires the use of the maxillary teeth as a reference frame to describe embodiments of the invention. Therefore, as used herein, terms such as labial, lingual, mesial, distal, occlusal, and gingival, used to describe brackets, are relative to the selected reference frame. However, embodiments of the invention are not limited to the selected reference frame and the terms described, as brackets can be used on other teeth in the oral cavity and in other directions.

[0033] For example, brackets can also be coupled to the lingual surface of teeth and fall within the scope of this invention. Those skilled in the art will recognize that the descriptive terms used herein may not be directly applicable when there are changes in the frame of reference. However, embodiments of the invention are intended to be independent of position and orientation within the oral cavity, and the related terminology used to describe the embodiments is merely to provide clear illustration of the embodiments in the drawings. Similarly, the related terms labial, lingual, mesial, distal, occlusal, and gingival in no way limit the invention to a particular position or orientation.

[0034] The terms labial, lingual, mesial, distal, occlusal, and gingival are industry terms used in orthodontic treatment. Taking an upper jaw tooth as an example, the tooth surface can be roughly divided into six surfaces. The surface of the tooth that occludes with the lower jaw teeth is the occlusal surface; the surface of the tooth that connects to the attached gingival tissue is the gingival surface; the occlusal surface and the gingival surface are opposite each other, and the direction formed by the occlusal surface and the gingival surface is also called the gingio-occlusal direction. The surface of the tooth facing the lips is the labial surface, and the surface of the tooth facing the tongue is the lingual surface; the labial surface and the lingual surface are opposite each other, and the direction formed by the labial surface and the lingual surface is also called the labiolingual direction. The two surfaces of the tooth that contact adjacent teeth are the mesial surface and the distal surface, the difference being their distance from the center; the direction formed by the two is also called the mesiodistal direction, or mesiodistal direction.

[0035] Furthermore, in the description of direction, "lip-tongue direction" generally refers to two directions. However, "lip-tongue direction" specifically refers to a single direction, that is, from the side of the lips to the side of the tongue, and this is used to distinguish them.

[0036] Please see Figures 1 to 7 In one embodiment, a self-ligating bracket 10 is provided to prevent the cover plate 300 from being accidentally opened. The self-ligating bracket 10 includes a base plate 100, a bracket body 200, a cover plate 300, a limiting member 400, and a spring 500. The bracket body 200 is disposed on the base plate 100. Specifically, the bracket body 200 can be fixed to one side of the base plate 100 by welding, or the bracket body 200 can be integrally formed with the base plate 100. A mesh structure can be provided on the side of the base plate 100 facing away from the bracket body 200, forming numerous tiny mesh holes and gaps. When adhesive (resin) is applied to the bracket base plate 100, it penetrates into these mesh holes. After curing, countless tiny "buttons" or "hooks" are formed between the adhesive and the mesh wires, significantly enhancing the bonding strength between the bracket and the teeth and preventing the bracket from falling off during orthodontic treatment.

[0037] The bracket body 200 has a bow wire groove 210, which divides the bracket body 200 into a first working wing 220 and a second working wing 230. The bow wire groove 210 is mainly used to accommodate the bow wire, and the bow wire groove 210 extends in the proximal-distal direction.

[0038] A cover plate 300 is slidably disposed on the second working wing 230, and a limiting groove 310 is formed on the side of the cover plate 300 facing the second working wing 230. Specifically, a slide rail 240 is provided on the second working wing 230, and a slide rail 320 is provided on the cover plate 300. The cover plate 300 is slidably disposed on the second working wing 230 by cooperating with the slide rail 320 and the slide rail 240. The sliding direction of the cover plate 300 is approximately parallel to the gingival-maxillary direction. The cooperation between the slide rail 320 and the slide rail 240 also prevents the cover plate 300 from detaching from the bracket body 200 from the labial-lingual direction. Specifically, in this embodiment, the slide rail 320 is disposed on the side of the cover plate 300 facing the second working wing 230, and the slide rail 320 is located on opposite sides of the limiting groove 310. The cover plate 300 with this structure typically covers a large area of ​​the second working wing 230 and the archwire groove 210. Generally, when the slide rail 320 is located on the side of the cover plate 300 facing the second working wing 230, the cover plate 300 fully covers the second working wing 230 and the bow wire groove 210. This structure of the self-locking tray 10 has a more rounded outer contour and fewer exposed gaps, further reducing the probability of food residue entering the self-locking tray 10. Of course, in other embodiments, the slide rail 320 can also be located on opposite sides of the cover plate 300.

[0039] The second working wing 230 has a mounting hole 250, which is mainly used to accommodate the limiting member 400 and the spring 500. Specifically, one end of the limiting member 400 extends into the mounting hole 250, and the other end extends into the limiting groove 310. The spring 500 is sleeved on the limiting member 400, with one end extending into the mounting hole 250 and the other end not extending into the limiting groove 310. The other end of the spring 500 is pressed against by the cover plate 300. Specifically, the other end of the spring 500 is pressed against by the slide rail 320 of the cover plate 300.

[0040] The main function of the limiting member 400 is to prevent the cover plate 300 from detaching from the second working wing 230. When the cover plate 300 slides along the gingival direction to the fully open position, the limiting member 400 abuts against the side wall of the limiting groove 310, preventing the cover plate 300 from continuing to slide and detaching from the second working wing 230. In this embodiment, the limiting member 400 does not deform. That is, the limiting member 400 will not deform in either the axial or radial direction.

[0041] Specifically, in this embodiment, the limiting member 400 includes a sleeve 410 and a limiting post 420. The limiting post 420 passes through the sleeve 410, with one end of the limiting post 420 and one end of the sleeve 410 extending into the mounting hole 250. The other end of the limiting post 420 extends into the limiting groove 310, while the other end of the sleeve 410 does not extend into the limiting groove 310. The spring 500 is sleeved outside the sleeve 410. Because the overall size of the self-locking bracket 10 is relatively small, the diameter of the limiting post 420 is usually designed to be relatively small. However, the spring 500 needs to provide a certain restoring force, so the diameter of the spring 500 is designed to be much larger than that of the limiting post 420. If the spring 500 is directly sleeved on the limiting post 420, the gap between the spring 500 and the limiting post 420 will be too large, and the limiting post 420 will not be able to perform the limiting function. Therefore, a sleeve 410 is sleeved on the limiting post 420 to eliminate the gap between the spring 500 and the limiting post 420, so that the spring 500 has a sufficiently large restoring force and the limiting post 420 can perform the limiting function.

[0042] Furthermore, in this embodiment, the limiting post 420 and the sleeve 410 are separate structures. Therefore, the limiting post 420 and the sleeve 410 are relatively independent parts, which is beneficial for standardization and also makes maintenance convenient; if any part fails, only that part needs to be replaced. Of course, in other embodiments, the limiting post 420 and the sleeve 410 can also be integrally formed. This results in a stable structure and a long service life.

[0043] Furthermore, the mounting hole 250 is a stepped hole, with the bottom diameter of the mounting hole 250 being smaller than the top diameter. One end of the spring 500 extends into the top of the mounting hole 250, and one end of the limiting member 400 extends into the bottom of the mounting hole 250. Generally, the axial length of the spring 500 is smaller than the axial length of the limiting member 400; therefore, a stepped hole is provided to accommodate the spring 500 and the limiting member 400 respectively. By enlarging the entire mounting hole 250 to match the diameter of the spring 500, the stepped hole structure increases the overall strength of both the second working wing 230 and the bracket body 200.

[0044] A slot 221 is provided on the side of the first working wing 220 facing the second working wing 230. A buckle 330 protrudes from the side of the cover plate 300 facing the first working wing 220. The buckle 330 can be engaged in the slot 221 to prevent the cover plate 300 from being opened accidentally. Specifically, the slot 221 has a concave structure 222, and the buckle 330 has a convex structure 331, which cooperates with the concave structure 222. Therefore, directly pushing or pulling the cover plate 300 will not open the cover plate 300, making the structure more stable and better preventing the cover plate 300 from being opened accidentally.

[0045] Furthermore, a positioning groove 340 is provided on the top of the cover plate 300. The purpose of the positioning groove 340 is to facilitate the positioning of tools such as probes, and to facilitate the application of force by the probes to the cover plate 300. For example, in this embodiment, the positioning groove 340 is a circular groove. Of course, in other embodiments, the positioning groove 340 can also be a square groove. The positioning groove 340 is usually a blind groove to prevent food residue from entering the interior of the self-locking tray 10.

[0046] Please see Figures 8 to 10 When it is necessary to open the cover plate 300, press the cover plate 300 towards the direction of the second working wing 230, the cover plate 300 compresses the spring 500, the buckle 330 and the slot 221 unlock, and push the cover plate 300 away from the first working wing 220 to open the cover plate 300.

[0047] When it is necessary to close the cover plate 300, press the cover plate 300 towards the second working wing 230. The cover plate 300 compresses the spring 500 and pushes the cover plate 300 towards the first working wing 220 until the buckle 330 extends into the slot 221. Release the cover plate 300. Under the restoring force of the spring 500, the cover plate 300 moves away from the second working wing 230, and the buckle 330 engages with the slot 221 to lock.

[0048] The self-locking bracket 10 with the function of preventing the cover plate 300 from being opened accidentally has at least the following advantages:

[0049] The operation of the self-locking bracket 10 is divided into two stages: opening the cover plate 300 and closing the cover plate 300. When it is necessary to open the cover plate 300, press the cover plate 300 towards the second working wing 230. After the cover plate 300 is subjected to force, it compresses the spring 500 sleeved outside the limiting member 400. As the cover plate 300 moves, the buckle 330 on the side facing the first working wing 220 gradually disengages from the slot 221 on the first working wing 220, thereby unlocking it. Then, push the cover plate 300 away from the first working wing 220 to fully open the cover plate 300 and expose the bow wire groove 210. When it is necessary to close the cover plate 300, first press the cover plate 300 towards the second working wing 230 to compress the spring 500, and then push the cover plate 300 towards the first working wing 220 so that the buckle 330 on the cover plate 300 is aligned and inserted into the slot 221 of the first working wing 220; after releasing the cover plate 300, the compressed spring 500 pushes the cover plate 300 away from the second working wing 230 under the action of the restoring force, so that the buckle 330 and the slot 221 are tightly engaged, thereby realizing the automatic locking of the cover plate 300.

[0050] The beneficial effects of the self-locking bracket 10 mentioned above are mainly reflected in the following three aspects: First, it has a trigger-type opening and anti-accidental opening function. The cover plate 300 can only be opened by a specific operation of "pressing and sliding". The cooperation structure of the buckle 330 and the slot 221 can effectively prevent the cover plate 300 from being accidentally opened due to daily chewing or external force collision, ensuring the stability of the archwire during orthodontic treatment. Second, the spring 500 has excellent durability. The spring 500 is sleeved outside the limiting member 400. During operation, it only undergoes axial compression deformation and has no lateral wear. Compared with elastic parts that are prone to deformation and wear, its service life is longer and it can maintain a stable locking force for a long time. Third, by pressing the entire cover plate 300 downward, the structure is simple, easy to manufacture, and the assembly relationship is clear. It does not require complex processing technology, which reduces the difficulty and cost of production and facilitates large-scale promotion and use.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A self-locking bracket with a function to prevent accidental opening of the cover plate, characterized in that, The device includes a base plate, a bracket body, a cover plate, a limiting member, and a spring. The bracket body is disposed on the base plate and has a bow wire groove that divides the bracket body into a first working wing and a second working wing. The cover plate is slidably disposed on the second working wing and has a mounting hole. The cover plate has a limiting groove on one side facing the second working wing. One end of the limiting member extends into the mounting hole, and the other end extends into the limiting groove. The spring is sleeved on the limiting member, with one end extending into the mounting hole and the other end not extending into the limiting groove. The other end of the spring is pressed against the cover plate. The first working wing has a slot on one side facing the second working wing, and the cover plate has a buckle protruding on one side facing the first working wing. The buckle can engage in the slot to prevent the cover plate from being accidentally opened. When it is necessary to open the cover, press the cover towards the second working wing, the cover compresses the spring, the buckle unlocks from the slot, and push the cover away from the first working wing to open the cover; When it is necessary to close the cover, press the cover towards the second working wing. The cover compresses the spring and pushes the cover towards the first working wing until the buckle extends into the slot. Release the cover and the cover moves away from the second working wing under the restoring force of the spring. The buckle engages with the slot to lock.

2. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 1, characterized in that, The slot has a concave structure, and the buckle has a convex structure, which cooperates with the concave structure.

3. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 1, characterized in that, The limiting component includes a sleeve and a limiting post. The limiting post passes through the sleeve. One end of the limiting post and one end of the sleeve extend into the mounting hole. The other end of the limiting post extends into the limiting groove. The other end of the sleeve does not extend into the limiting groove. The spring is sleeved outside the sleeve.

4. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 3, characterized in that, The limiting post and the sleeve are separate structures.

5. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 3, characterized in that, The limiting post and the sleeve are integrally formed.

6. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 1, characterized in that, The mounting hole is a stepped hole, the diameter of the bottom of the mounting hole is smaller than the size of the top of the mounting hole, one end of the spring extends into the top of the mounting hole, and one end of the limiting member extends into the bottom of the mounting hole.

7. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 1, characterized in that, The second working wing is provided with a slide rail, and the cover plate is provided with a slide rail. The cover plate is slidably disposed on the second working wing by cooperating with the slide rail and the slide rail.

8. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 7, characterized in that, The slide rails are located on opposite sides of the cover plate.

9. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 7, characterized in that, The slide rail is disposed on the side of the cover plate facing the second working wing, and the slide rail is located on opposite sides of the limiting groove.

10. The self-locking bracket with anti-accidental opening function of the cover plate according to claim 1, characterized in that, The top of the cover plate is provided with a positioning groove.

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