阅读说明：本技术 一种装配式墙顶结构及安装方式 (Assembled wall top structure and mounting mode ) 是由 丁泽成 王文广 黄慧 周东珊 余广 于 2021-08-16 设计创作，主要内容包括：本发明涉及建筑装饰结构技术领域,具体涉及一种装配式墙顶结构及安装方式,所述装配式墙顶结构包括墙面板、吊顶板以及转角收口组件,转角收口组件包括转角单元、固定在转角单元一端的横向连接单元以及固定在转角单元另一端的竖向连接单元；横向连接单元具有至少一个扣压部,吊顶板包括用于承载扣压部的第一端部连接单元；竖向连接单元具有开口朝下的第一插接槽,墙面板包括与第一插接槽插接配合的第二端部连接单元。该专利中转角收口组件在安装时无需横向连接单元和竖向连接单元都严格保持对准,只要在下压时保持第一插接槽与第二端部连接单元上用于插接的部分对准即可,扣压部自然落在第一端部连接单元上,无严格精度要求,因此安装方便快捷。(The invention relates to the technical field of architectural decoration structures, in particular to an assembled wall top structure and an installation mode, wherein the assembled wall top structure comprises a wall panel, a ceiling board and a corner closing-in assembly, and the corner closing-in assembly comprises a corner unit, a transverse connecting unit fixed at one end of the corner unit and a vertical connecting unit fixed at the other end of the corner unit; the transverse connecting unit is provided with at least one buckling part, and the ceiling board comprises a first end connecting unit for bearing the buckling part; the vertical connecting unit is provided with a first inserting groove with a downward opening, and the wall panel comprises a second end connecting unit which is in inserting fit with the first inserting groove. Corner binding off subassembly need not transverse connection unit and vertical linkage unit all strictly to keep aligning when the installation in this patent, as long as keep when pushing down on first inserting groove and the second end linkage unit be used for the part of pegging graft to aim at can, the withholding portion falls naturally on first end linkage unit, does not have strict precision requirement, therefore simple to operate is swift.)

1. An assembled wall top structure is characterized by comprising a vertical wall panel (2), a tiled ceiling plate (1) and a corner closing-in assembly (3), wherein the corner closing-in assembly (3) comprises a corner unit (33), a transverse connecting unit (31) fixed at one end of the corner unit (33) and used for being connected with the ceiling plate (1), and a vertical connecting unit (32) fixed at the other end of the corner unit (33) and used for being connected with the wall panel (2); the transverse connecting unit (31) extends along the transverse direction and is provided with at least one buckling part (311), and the ceiling board (1) comprises a first end connecting unit (11) for bearing the buckling part (311); the vertical connecting unit (32) extends vertically and is provided with a first inserting groove (321) with a downward opening, and the wall panel (2) comprises a second end connecting unit (21) which is in inserting fit with the first inserting groove (321).

2. An assembled wall top structure according to claim 1, wherein the downward-facing surface of the pressing portion (311) is a pressing surface (312), and the first end connection unit (11) includes a bearing surface (111) for bearing the pressing surface (312).

3. An assembled wall top structure according to claim 2, wherein a first magnetic attraction layer (313) is fixed on the fastening surface (312), and a second magnetic attraction layer (112) capable of attracting the first magnetic attraction layer (313) is fixed on the bearing surface (111).

4. An assembled wall top structure according to claim 3, wherein at least a part of the pressing surface (312) is inclined.

5. An assembled wall top structure according to claim 3, wherein the bearing surface (111) and the fastening surface (312) are both flat, the transverse connecting unit (31) further comprises a limiting groove (314) with a downward opening, the height of the groove bottom of the limiting groove (314) is higher than that of the fastening surface (312), the first end connecting unit (11) comprises a limiting part (113) extending into the limiting groove (314), and the limiting part (113) is provided with a guide surface (114) for guiding the fastening surface (312) above the bearing surface (111).

6. An assembled type wall top structure according to claim 5, wherein a third magnetic absorption layer (315) is fixed on the bottom surface of the position limiting groove (314), a fourth magnetic absorption layer (115) capable of attracting the third magnetic absorption layer (315) is fixed on the upper surface of the position limiting portion (113), and the polarity of the fourth magnetic absorption layer (115) is opposite to that of the first magnetic absorption layer (313).

7. An assembled wall top structure according to claim 6, wherein the second end connection unit (21) comprises a plug-in projection (211) capable of protruding into the first plug-in groove (321).

8. An assembled wall top structure according to claim 6, wherein the second end connection unit (21) comprises a second insertion groove (212) opened upward and an insertion plate (213) having a lower portion capable of being inserted into the second insertion groove (212), and the upper portion of the insertion plate (213) is capable of being inserted into the first insertion groove (321).

9. An assembled wall top structure according to claim 8, wherein the middle of the inserting plate (213) is provided with a barrier (214) extending in the transverse direction, the barrier (214) separating the vertical connecting unit (32) and the second end connecting unit (21).

10. An assembly type wall top structure installation method according to claim 9, comprising the steps of:

s1: respectively installing the vertical wall panel (2) and the flat-paved ceiling board (1) on a wall body;

s2: inserting the lower half part of the inserting plate (213) into the second inserting groove (212), wherein the upper half part of the inserting plate (213) extends out above the second end connecting unit (21), and the lower surface of the baffle plate (214) is attached to the upper end surface of the wall panel (2);

s3: placing the corner closing-in assembly (3) between the first end connecting unit (11) and the second end connecting unit (21), wherein the vertical connecting unit (32) is positioned right above the second end connecting unit (21) and an opening of the first inserting groove (321) is aligned with the inserting plate (213), the transverse connecting unit (31) is positioned right above the first end connecting unit (11) and the buckling surface (312) is aligned with the bearing surface (111), and the limiting groove (314) is aligned with the limiting part (113);

s4: moving the whole corner closing-in assembly (3) downwards along the vertical direction and enabling the plug board (213) to start to enter the first plug groove (321);

s5: the attractive force between the first magnetic attraction layer (313) and the second magnetic attraction layer (112) guides the pressing surface (312) to keep aligned with the bearing surface (111) and accelerates the pressing down of the pressing surface (312).

Technical Field

The invention relates to the technical field of architectural decoration structures, in particular to an assembled wall top structure and an installation mode.

Background

In traditional construction, the juncture of wall decoration material and top decoration material can leave the gap, need to fill caulking compound, covers the uneven problem in gap, perhaps uses the moulding of various styles to cover the piece seam, guarantees when reaching decorative effect that the binding off is pleasing to the eye. When the distance between the wall surface and the top surface at the internal corner or the external corner of the wall body is larger, the closing-up line structure is not adopted, but the wall surface and the top surface are connected through the corner structure, and the closing-up between the wall surface and the top surface is realized. The European-style wallboard fillet disclosed in the Chinese patent with the application number of 201620100224.4 comprises a first wood veneer, a second wood veneer and a circular arc-shaped solid wood internal corner, wherein the first wood veneer is connected with one side edge of the circular arc-shaped solid wood internal corner bent inwards, the second wood veneer is connected with the other side edge of the circular arc-shaped solid wood internal corner bent inwards, and the first wood veneer and the second wood veneer are respectively connected with the two sides of the circular arc-shaped solid wood internal corner through clamping strip grooves. This patent realizes connecting and binding off between wood veneer one and the wood veneer two through convex wood reentrant corner, nevertheless connects through card strip groove, and its joint strength is not enough, and the dismouting is inconvenient.

Disclosure of Invention

In view of the above technical problems, the present invention provides an improvement to the above patent, that is, a technical solution to be provided by the present invention is an assembly type wall top structure, including a vertical wall panel, a tiled ceiling board, and a corner closing-in assembly, where the corner closing-in assembly includes a corner unit, a transverse connecting unit fixed to one end of the corner unit and used for connecting with the ceiling board, and a vertical connecting unit fixed to the other end of the corner unit and used for connecting with the wall panel; the transverse connecting unit extends along the transverse direction and is provided with at least one buckling part, and the ceiling board comprises a first end connecting unit for bearing the buckling part; the vertical connecting unit extends vertically and is provided with a first inserting groove with a downward opening, and the wall panel comprises a second end connecting unit which is in inserting fit with the first inserting groove.

Preferably, the surface of the fastening part facing downwards is a fastening surface, and the first end connecting unit includes a bearing surface for bearing the fastening surface.

Preferably, the fastening surface is fixed with a first magnetic attraction layer, and the bearing surface is fixed with a second magnetic attraction layer capable of attracting the first magnetic attraction layer.

Preferably, at least a part of the pressing surface is inclined.

Preferably, the bearing surface and the buckling surface are both in a flat state, the transverse connection unit further comprises a limiting groove with a downward opening, the bottom surface of the limiting groove is higher than the buckling surface, the first end connection unit comprises a limiting part extending into the limiting groove, and the limiting part is provided with a guide surface for guiding the buckling surface to the upper side of the bearing surface.

Preferably, a third magnetic attraction layer is fixed on the bottom surface of the limiting groove, a fourth magnetic attraction layer capable of attracting the third magnetic attraction layer is fixed on the upper surface of the limiting portion, and the polarity of the fourth magnetic attraction layer is opposite to that of the first magnetic attraction layer.

Preferably, the second end connection unit includes a plug projection capable of extending into the first plug groove.

Preferably, the second end connection unit includes a second insertion groove with an upward opening and an insertion plate with a lower half portion capable of extending into the second insertion groove, and the upper half portion of the insertion plate is capable of extending into the first insertion groove.

Preferably, the middle of the insertion plate is provided with a baffle plate extending along the transverse direction, and the baffle plate separates the vertical connecting unit from the second end connecting unit.

An installation method of an assembly type wall top structure comprises the following steps:

s1: respectively installing the vertical wall panel and the flat-paved ceiling board on a wall body;

s2: inserting the lower half part of the inserting plate into the second inserting groove, wherein the upper half part of the inserting plate extends out of the second end connecting unit, and the lower surface of the baffle plate abuts against the upper end surface of the wall panel;

s3: placing the corner closing-in assembly between the first end connecting unit and the second end connecting unit, wherein the vertical connecting unit is positioned right above the second end connecting unit, an opening of the first inserting groove is aligned with the inserting plate, the transverse connecting unit is positioned right above the first end connecting unit, the buckling and pressing surface is aligned with the bearing surface, and the limiting groove is aligned with the limiting part;

s4: moving the whole corner closing-in assembly downwards along the vertical direction and enabling the inserting plate to start to enter the first inserting groove;

s5: the acting force of mutual attraction between the first magnetic attraction layer and the second magnetic attraction layer guides the buckling and pressing surface to keep aligned with the bearing surface and accelerates the buckling and pressing surface to be pressed downwards.

Has the advantages that:

the corner closing-in assembly of the assembly type wall top structure does not need to require that the transverse connecting unit and the vertical connecting unit are strictly aligned when being pressed down and installed, only needs to keep the parts for splicing on the first splicing groove and the second end connecting unit to be aligned when being pressed down, and the buckling part naturally falls on the first end connecting unit without strict precision requirement, so that the assembly type wall top structure is convenient and quick to install; in addition, the wall panel and the ceiling board are installed in advance, so that the wall panel and the ceiling board are installed independently of the corner closing-in assembly, and once the wall panel or the ceiling board is damaged, the wall panel or the ceiling board needs to be replaced, and the wall panel and the ceiling board are convenient to disassemble and assemble.

Drawings

FIG. 1 is a schematic view of the general structure of an assembled wall top structure of the present invention;

FIG. 2 is a schematic view of the connection between the corner closing-in assembly and the ceiling tile and the wall panel;

FIG. 3 is a schematic structural view of the first end connection unit;

FIG. 4 is a schematic view of the first end connection unit with a magnetic attraction layer secured thereto;

FIG. 5 is a schematic structural view of a transverse connection unit;

FIG. 6 is a schematic view of a transverse connection unit with a magnetic attraction layer fixed thereon;

FIG. 7 is a schematic view of the connection of the first end connection unit with the transverse connection unit;

FIG. 8 is a schematic view of a first embodiment of a plug-in connection with a wall panel having a plug-in projection integrally formed thereon;

FIG. 9 is an exploded view of a second plug-in mating embodiment;

in the figure: 1. the suspended ceiling board, 2, the shingle nail, 3, the corner closing-in component, 11, the first end connecting unit, 111, the bearing surface, 112, the second magnetic attraction layer, 113, the spacing part, 114, the guide surface, 115, the fourth magnetic attraction layer, 116, the bearing groove, 21, the second end connecting unit, 211, the inserting convex block, 212, the second inserting groove, 213, the inserting plate, 214, the baffle, 31, the transverse connecting unit, 311, the buckling part, 312, the buckling surface, 313, the first magnetic attraction layer, 314, the spacing groove, 315, the third magnetic attraction layer, 32, the vertical connecting unit, 321, the first inserting groove, 33, the corner unit.

Detailed Description

The following specific examples are given by way of illustration only and not by way of limitation, and it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made in the examples without inventive faculty, and yet still be protected by the scope of the claims.

Fig. 1 shows an assembled wall top structure of the present invention, which includes an upright wall panel 2, a tiled ceiling board 1, and a corner closing assembly 3, where the corner closing assembly 3 includes a corner unit 33, a transverse connection unit 31 fixed at one end of the corner unit 33 and used for connecting with the ceiling board 1, and a vertical connection unit 32 fixed at the other end of the corner unit 33 and used for connecting with the wall panel 2. The form that is tiling in this embodiment the hoist and mount of furred ceiling board 1 have the interval between furred ceiling board 1 and the smallpox, be upright form shingle nail 2 is installed on the wall body, furred ceiling board 1 with connect through corner binding off subassembly 3 between the shingle nail 2, consequently transverse connection unit 31 along transverse extension realize with the connection of furred ceiling board 1, vertical connecting unit 32 along vertical extension realize with the connection of shingle nail 2. The assembly type wall top structure is usually pre-installed with a wall panel 2 and a ceiling board 1 during installation, and then is provided with a corner closing-in component 3, wherein the corner closing-in component 3 has two installation modes, one mode is installation by moving along the horizontal direction, and the other mode is installation by pressing down along the vertical direction; in the former installation method, the transverse connection unit 31 needs to be aligned with the connection structure on the ceiling board 1 in advance, and the vertical connection unit 32 needs to be aligned with the connection structure on the wall panel 2 in advance, which has a high requirement on the placement accuracy of the corner closing-in assembly 3, and a fine accuracy error exists, so that the two alignment requirements cannot be met, and in addition, in general, the corner unit 33 in the corner closing-in assembly 3 has a certain tension after the installation is completed, and the corner unit 33 has a fine deformation, which does not exist before the installation, so that the two alignment requirements are difficult to be met, and therefore, the installation efficiency is low; in this embodiment, the corner closing-in component 3 is preferably installed by pressing down in the vertical direction. As shown in fig. 5, the transverse connecting unit 31 has at least one buckling part 311, the ceiling plate 1 includes a first end connecting unit 11 for carrying the buckling part 311, and during the installation process of the downward movement of the corner closing-in assembly 3, the buckling part 311 moves downward to connect with the first end connecting unit 11; the vertical connection unit 32 is provided with a first insertion groove 321 with a downward opening, the wall panel 2 includes a second end connection unit 21 in insertion fit with the first insertion groove 321, and in the installation process of the downward movement of the corner closing-up assembly 3, the first insertion groove 321 moves downward and is connected with the second end connection unit 21. The corner closing-in component 3 of the assembly type wall top structure does not need to require that the transverse connecting unit 31 and the vertical connecting unit 32 are strictly aligned when being pressed down and installed, only needs to keep the parts for plugging on the first plugging groove 321 and the second end connecting unit 21 aligned when being pressed down, and has no strict precision requirement because the buckling part 311 naturally falls on the first end connecting unit 11, so that the installation is convenient and quick; in addition, the wall panel 2 and the ceiling board 1 are installed in advance, so that the installation of the wall panel 2 and the ceiling board 1 does not depend on the corner closing-in component 3, and once the wall panel 2 or the ceiling board 1 is damaged, the wall panel or the ceiling board needs to be replaced, and the wall panel or the ceiling board is convenient to disassemble and assemble.

In this embodiment, the downward surface of the pressing portion 311 is a pressing surface 312, the first end connecting unit 11 includes a bearing surface 111 for bearing the pressing surface 312, the pressing surface 312 is attached to the bearing surface 111, and the bearing surface 111 plays a good role in supporting the pressing portion 311 through the pressing surface 312, thereby supporting the transverse connecting unit 31. In a further improvement, a first magnetic absorption layer 313 is fixed on the fastening surface 312, and a second magnetic absorption layer 112 capable of attracting the first magnetic absorption layer 313 is fixed on the bearing surface 111, that is, the polarities of the first magnetic absorption layer 313 and the second magnetic absorption layer 112 are opposite, so that the fastening surface 312 and the bearing surface 111 are detachably fixed, and the connection strength between the first end connection unit 11 and the transverse connection unit 31 is enhanced. On the basis that the acting force between the first magnetic attraction layer 313 and the second magnetic attraction layer 112 is along the up-down direction, and the buckling part 311 is not limited in the horizontal direction, two improved embodiments exist; one is that at least a part of the fastening surface 312 is inclined, correspondingly, at least a part of the bearing surface 111 is inclined to fit with the inclined part of the fastening surface 312, so that the fastening part 311 is limited in the horizontal direction, and the connection strength between the first end connection unit 11 and the transverse connection unit 31 is further enhanced, but correspondingly, the first magnetic absorption layer 313 and the second magnetic absorption layer 112 are also inclined, both the first magnetic absorption layer 313 and the second magnetic absorption layer 112 are not flat, and the magnetic absorption effect may be affected; the other is that the bearing surface 111 and the pressing surface 312 are flat surfaces in a flat state, the first magnetic absorption layer 313 and the second magnetic absorption layer 112 are flat surfaces, so as to ensure a good magnetic absorption effect, and the restriction of the pressing portion 311 in the horizontal direction is achieved by arranging the limiting groove 314 and the limiting portion 113.

Fig. 6 shows that the transverse connection unit 31 further includes a limiting groove 314 with a downward opening, the height of the groove bottom surface of the limiting groove 314 is higher than the height of the fastening surface 312, the first end connection unit 11 includes a limiting portion 113 extending into the limiting groove 314, so that the limiting portion 113 is also higher than the bearing surface 111, a bearing groove 116 is formed above the bearing surface 111, after the installation is completed, the fastening portion 311 enters the bearing groove 116, and the limiting portion 113 enters the limiting groove 314 to form a zigzag staggered structure, so that the fastening portion 311 is limited in the horizontal direction, thereby enhancing the connection strength. According to the above, when the pressing portion 311 is installed, the bearing surface 111 does not need to be aligned strictly, so as to reduce the installation difficulty, the embodiment is further improved, the limiting portion 113 has the guide surface 114 for guiding the pressing surface 312 to the upper side of the bearing surface 111, that is, for guiding the pressing portion 311 into the bearing groove 116, and the guide surface 114 may be an inclined surface or an arc surface.

In a further improvement, a third magnetic absorption layer 315 is fixed on the bottom surface of the limiting groove 314, a fourth magnetic absorption layer 115 capable of attracting the third magnetic absorption layer 315 is fixed on the upper surface of the limiting portion 113, that is, the polarity of the third magnetic absorption layer 315 is opposite to that of the fourth magnetic absorption layer 115, and the connection strength between the transverse connection unit 31 and the first end connection unit 11 can be further enhanced after the installation. Since some of the pressing surface 312 may be located above the position-limiting portion 113 during installation, it should be avoided that the first magnetic attraction layer 313 provided on the pressing surface 312 and the fourth magnetic attraction layer 115 fixed on the upper surface of the position-limiting portion 113 attract each other to block the pressing portion 312 from entering the bearing slot 116, so that the polarity of the fourth magnetic attraction layer 115 is opposite to that of the first magnetic attraction layer 313, and when installation, a repulsive force exists between the pressing surface 312 and the position-limiting portion 113 to push the pressing surface 312 to move down along the guide surface 114 and enter the bearing slot 116, thereby further improving the installation efficiency.

In this embodiment, it is required to ensure that the first inserting groove 321 in the vertical connecting unit 32 is aligned with the part for inserting in the second end connecting unit 21 and inserting fit is realized when mounting, and there are two embodiments for arranging the inserting part on the second end connecting unit 21; one is that the second end connection unit 21 includes an insertion protrusion 211 capable of extending into the first insertion groove 321, and the insertion protrusion 211 is integrally formed on the wall panel 2; the second end connection unit 21 includes a second insertion groove 212 with an upward opening and a insertion plate 213 with a lower portion capable of being inserted into the second insertion groove 212, and an upper portion of the insertion plate 213 is capable of extending into the first insertion groove 321. Since the plugging portion is easily broken, once the plugging protrusion 211 is broken, the whole wall panel needs to be replaced, and once the plugging plate 213 is broken, the plugging plate 213 only needs to be replaced alone in the second embodiment, and the whole wall top structure does not need to be disassembled completely during replacement, and only the broken plugging plate 213 needs to be pulled out in the horizontal direction, and then a new plugging plate 213 is inserted in the horizontal direction. The second embodiment described above is therefore preferred. In a further improvement, the middle of the inserting plate 213 is provided with a baffle plate 214 extending along the transverse direction, the baffle plate 214 separates the vertical connecting unit 32 from the second end connecting unit 21, so that the vertical connecting unit 32 and the second end connecting unit 21 are prevented from being violently collided when being installed, a protection effect is achieved, meanwhile, the baffle plate 214 is attached to the upper surface of the wall panel 2, a correction effect can be achieved on the vertical state of the inserting plate 213, the inserting plate 213 is ensured to be kept in the vertical state, alignment of the first inserting groove 321 is facilitated, and the installation efficiency is further improved.

The invention relates to an installation mode of an assembly type wall top structure, which comprises the following steps:

s1: respectively installing the vertical wall panel 2 and the flat-paved ceiling board 1 on a wall body;

s2: inserting the lower half part of the inserting plate 213 into the second inserting groove 212, wherein the upper half part of the inserting plate 213 extends above the second end connecting unit 21, and the lower surface of the baffle plate 214 abuts against the upper end surface of the wall panel 2;

s3: placing the corner closing-in assembly 3 between the first end connection unit 11 and the second end connection unit 21, the vertical connection unit 32 being located right above the second end connection unit 21 and the opening of the first inserting-connecting groove 321 being aligned with the inserting-connecting plate 213, the horizontal connection unit 31 being located right above the first end connection unit 11 and the pressing surface 312 being aligned with the bearing surface 111, and the limiting groove 314 being aligned with the limiting portion 113;

s4: moving the whole corner closing-in assembly 3 downward along the vertical direction and making the plugging plate 213 start to enter the first plugging slot 321;

s5: the attractive force between the first magnetic attraction layer 313 and the second magnetic attraction layer 112 guides the fastening surface 312 to keep aligned with the carrying surface 111 and accelerates the fastening surface 312 to be pressed down.

In the first step, the wall panel 2 and the ceiling board 1 are independently installed in advance, and the corner closing-in assembly 3 is not needed, so that the assembly and disassembly are convenient, any one of the wall panel and the ceiling board can be independently replaced when damaged, and other parts are not affected. In the second step, the baffle plate 214 can correct the vertical state of the socket plate 213, so as to ensure that the socket plate 213 is kept in the vertical state, thereby facilitating the alignment of the first socket 321 and further improving the installation efficiency. In the third step, the corner closing-in component 3 is pressed down for installation, the first inserting-connecting groove 321 is aligned with the inserting-connecting plate 213, and the pressing portion 311 only needs to be aligned with the bearing surface 111 approximately, because the corner closing-in component 3 is slightly deformed due to the tension after the installation is completed, and the corner closing-in component 3 is not deformed before the installation, when the first inserting-connecting groove 321 is aligned with the inserting-connecting plate 213, the pressing surface 312 is not aligned with the bearing surface 111 strictly, and needs to pass through the guide surface 114 to enter the bearing groove 116 smoothly. The installer is only required to focus on the alignment of the first jack slot 321 and the jack panel 213 during installation, which greatly increases the efficiency of installation. In the fourth step, when the entire corner closing-in assembly 3 moves downward along the vertical direction and the inserting plate 213 starts to enter the first inserting groove 321, the transverse connecting unit 31 naturally moves toward the first end connecting unit 11, and the fifth step is performed as the corner closing-in assembly 3 continues to move downward. In the fifth step, the mutual attraction between the first magnetic attraction layer 313 and the second magnetic attraction layer 112 guides the pressing surface 312 to enter the bearing groove 116 along the guide surface 114 and gradually align with the bearing surface 111, the mutual attraction between the third magnetic attraction layer 315 and the fourth magnetic attraction layer 115 also guides the position-limiting portion 113 to enter the position-limiting groove 314, and the repulsive force between the first magnetic attraction layer 313 and the fourth magnetic attraction layer 115 pushes the pressing portion 311 to enter the bearing groove 116.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.