Ceiling structure convenient to disassemble

Abstract

The utility model discloses a ceiling structure convenient to disassemble. The ceiling structure comprises a pinch plate, a main keel and an auxiliary keel. The main keel is arranged along the X axis, the two or more auxiliary keels are arranged below the main keel side by side along the Y axis, and the auxiliary keels are detachably connected with the main keel. The bottoms of the auxiliary keels extend towards the two sides of the X axis to form connecting plates. Every two adjacent auxiliary keels form a buckle plate installation area through the corresponding connecting plate. The ceiling structure is matched with the connecting plates at the bottoms of the auxiliary keels through the buckling notches in the buckling plates and the elastic pieces, detachable connection is achieved, the buckling plates are detached downwards, the problem that the aluminum alloy ceiling and the building ceiling are insufficient in space and cannot be detached smoothly is solved, the installation and detachment process is simple, and the installation and detachment efficiency is improved. Operation is easy, and workers can maintain, replace and disassemble the aluminum alloy suspended ceiling conveniently.

Description

Technical Field

[0001] The utility model relates to the field of indoor suspended ceilings, in particular to a suspended ceiling structure which is easy to disassemble. Background Art

[0002] The suspended ceiling, also known as the ceiling, is an important sub-division of the building decoration project. The suspended ceiling has the functions of heat preservation, heat insulation, sound insulation, and sound absorption. It is also a hidden layer for electrical, ventilation and air conditioning, communication, fire protection, alarm pipeline equipment and other projects. In the prior art, the aluminum alloy suspended ceiling belongs to the placement type ceiling. When it encounters maintenance during use, the aluminum gusset plate needs to be disassembled upward. If there is insufficient space between the aluminum alloy suspended ceiling and the building ceiling, one of the aluminum gusset plates needs to be destroyed before the other aluminum gusset plates can be disassembled, making the disassembly process more troublesome, causing great inconvenience to the maintenance, replacement and disassembly of the aluminum alloy suspended ceiling. Utility Model Content

[0003] The utility model aims to provide a ceiling structure that is easy to disassemble, so as to solve the problem that the aluminum alloy ceiling is affected by the structure, resulting in the aluminum gusset plate being difficult to repair, replace and disassemble.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a ceiling structure that is easy to disassemble, comprising a gusset plate, a main keel and a secondary keel;

[0006] The main keel is arranged along the X-axis, and two or more auxiliary keels are arranged side by side below the main keel along the Y-axis, and the auxiliary keels are detachably connected to the main keel; a connecting plate is extended from the bottom of the auxiliary keel to both sides of the X-axis; two adjacent auxiliary keels form a gusset plate installation area through the connecting plate;

[0007] The gusset plate comprises a gusset plate body, a connecting frame and an elastic member; the bottom area of ​​the connecting frame is smaller than the gusset plate body; the connecting frame is arranged on the top of the gusset plate body, and both ends of the connecting frame in the X-axis direction are provided with a clearance area; the elastic member is arranged on one side of the connecting frame in the X-axis direction; both sides of the connecting frame in the Y-axis direction extend to the other side of the connecting frame in the X-axis direction, and form a buckling notch with the gusset plate body;

[0008] The size of the snap-fit ​​notch is adapted to the thickness of the connecting plate, the bottom of the elastic member is against the connecting plate of the secondary keel on one side of the X-axis direction, and the elastic member is tightly against one side of the clip plate mounting area in the X-axis direction; the snap-fit ​​notch is clamped with the connecting plate on the other side of the X-axis direction.

[0009] In the easily disassembled ceiling structure, the main keel is provided with a plurality of first hanging weights at intervals, the upper ends of the first hanging weights are bent downward to form fixed hooks, the first hanging weights are connected to the main keel via the fixed hooks, and the lower ends of the first hanging weights are detachably connected to the secondary keel.

[0010] In the ceiling structure that is easy to disassemble, a sliding notch is provided at the lower end of the first hanging code, a sliding block is provided at the top of the secondary keel, and the secondary keel is slidably assembled with the sliding block through the sliding notch.

[0011] In the ceiling structure that is easy to disassemble, the side walls of the main keel are provided with multiple first fixing holes at intervals, the first hanging code is provided with a first through hole and a first fixing code, the fixing hook is provided with a second through hole, the position of the first through hole and the position of the second through hole are adapted to the first fixing hole, the first fixing code passes through the first through hole, the first fixing hole and the second through hole in sequence, and the first hanging code is fixed to the main keel.

[0012] The ceiling structure that is easy to disassemble also includes a main keel connection assembly, which includes a second hanging bracket, a second fixing bracket, a corner plate and a fixing bolt, and the fixing bolt is fixed to the top of the ceiling; the cross section of the corner plate is "L"-shaped, and the side plate of the corner plate in the horizontal direction is fixedly connected to the fixing bolt by a nut; the structure of the second hanging bracket is the same as that of the first hanging bracket, and the structure of the second fixing bracket is the same as that of the first fixing bracket;

[0013] The second hanging code is hung on the angle plate, and the side plates of the angle plate in the vertical direction are provided with a plurality of second fixing holes at intervals, the second hanging code is provided with a third through hole, and the fixing hook of the second hanging code is provided with a fourth through hole, the positions of the third through hole and the fourth through hole are adapted to the second fixing hole, the second fixing code passes through the third through hole, the second fixing hole and the fourth through hole in sequence, and the second hanging code is fixed to the angle plate.

[0014] In the ceiling structure that is easy to disassemble, the elastic part is a metal sheet, and the metal sheet includes an integrally formed first connecting part, a first arc-shaped part, a second connecting part, a second arc-shaped part and a third connecting part, and the first connecting part, the second connecting part and the third connecting part are respectively connected to the side walls of the connecting frame; the metal sheet is in an "m" shape.

[0015] In the ceiling structure that is easy to disassemble, the gusset plate body also includes glass wool, and the glass wool is filled in the gusset plate body.

[0016] In the ceiling structure that is easy to disassemble, the secondary keel includes multiple sections of spliced ​​keels with the same structure, one end of the spliced ​​keel is provided with a connecting female buckle, and the other end of the spliced ​​keel is provided with a connecting male buckle; the spliced ​​keels are spliced ​​to form a secondary keel by connecting the connecting female buckle and the connecting male buckle.

[0017] A technical solution in the utility model can have the following beneficial effects:

[0018] The ceiling structure achieves a detachable connection by cooperating with the connecting plate at the bottom of the secondary keel through the snap-fitting notches and elastic parts on the gusset plate, and the gusset plate is disassembled downward, which solves the problem of insufficient space between the aluminum alloy ceiling and the building ceiling, resulting in the inability to disassemble smoothly. The installation and disassembly process is simple and easy to operate, which is convenient for the staff to repair, replace and disassemble the aluminum alloy ceiling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of one embodiment of the utility model in the X-axis direction;

[0020] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0021] Figure 3 It is a cross-sectional view of one embodiment of the utility model in the Y-axis direction;

[0022] Figure 4 This is a schematic diagram of the connection between the main keel and the secondary keel in one embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the first fixed code in one embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of a gusset plate in one embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of splicing keels in one embodiment of the utility model;

[0026] In the attached figure: gusset plate 1, main keel 2, auxiliary keel 3;

[0027] The gusset plate body 11, the connecting frame 12, the elastic member 13; the fastening notch 14; the first fixing hole 20; the first hanging code 21; the connecting plate 31; the sliding block 32; the splicing keel 33; the second hanging code 41, the second fixing code 42, the angle plate 43, and the fixing bolt 44;

[0028] The first connecting portion 131 , the first arc portion 132 , the second connecting portion 133 , the second arc portion 134 , the third connecting portion 135 ; the sliding notch 211 ; the first through hole 212 , the first fixing code 213 ; the connecting female buckle 331 , the connecting male buckle 332 . DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe features, without distinction of order or importance.

[0031] In the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Please refer to Figures 1 to 7 The utility model provides a ceiling structure that is easy to disassemble, including a gusset plate 1, a main keel 2 and a secondary keel 3;

[0034] The main keel 2 is arranged along the X-axis, and two or more auxiliary keels 3 are arranged side by side below the main keel 2 along the Y-axis, and the auxiliary keel 3 is detachably connected to the main keel 2; a connecting plate 31 is extended from the bottom of the auxiliary keel 3 to both sides of the X-axis; two adjacent auxiliary keels 3 form a gusset plate installation area through the connecting plate 31;

[0035] The gusset plate 1 comprises a gusset plate body 11, a connecting frame 12 and an elastic member 13; the bottom area of ​​the connecting frame 12 is smaller than the gusset plate body 11; the connecting frame 12 is arranged on the top of the gusset plate body 11, and both ends of the connecting frame 12 in the X-axis direction are provided with a clearance area; the elastic member 13 is arranged on one side of the connecting frame 12 in the X-axis direction; both sides of the Y-axis of the connecting frame 12 extend to the other side of the connecting frame 12 in the X-axis direction, and form a buckling notch 14 with the gusset plate body 11;

[0036] The size of the snap-fit ​​notch 14 is adapted to the thickness of the connecting plate 31, the bottom of the elastic member 13 is against the connecting plate 31 of the secondary keel 3 on one side of the X-axis direction, and the elastic member 13 is tightly against one side of the snap plate mounting area in the X-axis direction; the snap-fit ​​notch 14 is clamped with the connecting plate 31 on the other side of the X-axis direction.

[0037] The main keel 2 and the secondary keel 3 form the main frame of the ceiling, and the bottom of the secondary keel 3 is provided with a connecting plate 31 extending to both sides of the X-axis; two adjacent secondary keels 3 form a buckle plate installation area through the connecting plate 31; the connecting plate 31 of the secondary keel 3 on the other side of the X-axis direction is stuck in the buckle plate 1 The notch 14, and the elastic member 13 is tightly against the secondary keel 3 on one side of the X-axis direction; at the same time, the bottom of the elastic member 13 also presses on the connecting plate 31 of the secondary keel 3 on one side of the X-axis direction, so that the buckle plate 1 can be firmly connected to the buckle plate installation area.

[0038] When the buckle plate 1 needs to be removed, the buckle plate body 11 is pushed toward one side of the elastic member 13, so that the buckle plate 1 is translated toward one side of the elastic member 13, and the elastic member 13 is compressed, so that the connecting plate 31 on the other side of the X-axis direction leaves the snap-fit ​​notch 14; then, with the side of the buckle plate body 11 close to the elastic member 13 as the rotation axis, the end of the buckle plate body 11 close to the snap-fit ​​notch 14 is rotated downward, and the buckle plate 1 can be removed from the buckle plate installation area.

[0039] When the buckle plate 1 needs to be reinstalled, the end of the buckle plate body 11 close to the elastic member 13 is first inserted into the connecting plate 31 of the secondary keel 3 on one side of the X-axis direction, so that the elastic member 13 rests against the connecting plate 31 of the secondary keel 3; then, with the side of the buckle plate body 11 close to the elastic member 13 as the rotation axis, the end of the buckle plate body 11 close to the snap-fitting notch 14 is rotated upward; when the snap-fitting notch 14 is close to the connecting plate 31 on the other side of the X-axis direction, the buckle plate body 11 is pushed toward the side of the elastic member 13, so that the buckle plate 1 moves toward the side of the elastic member 13, and the elastic member 13 is compressed, so that the connecting plate 31 on the other side of the X-axis direction has enough space to be inserted into the snap-fitting notch 14; then, the buckle plate body 11 is released to reset the elastic member 13, and the connecting plate 31 on the other side of the X-axis direction can be inserted into the snap-fitting notch 14 to complete the installation of the buckle plate 1.

[0040] The ceiling structure achieves a detachable connection by cooperating with the connecting plate 31 at the bottom of the secondary keel 3 through the snap-fitting notch 14 and the elastic member 13 on the gusset plate 1, and the gusset plate 1 is disassembled downward, which solves the problem of insufficient space between the aluminum alloy ceiling and the building ceiling, resulting in the inability to disassemble smoothly. The installation and disassembly process is simple and easy to operate, which is convenient for the staff to repair, replace and disassemble the aluminum alloy ceiling.

[0041] Furthermore, the main keel 2 is provided with a plurality of first hanging brackets 21 at intervals, the upper ends of the first hanging brackets 21 are bent downward to form fixed hooks, the first hanging brackets 21 are connected to the main keel 2 via the fixed hooks, and the lower ends of the first hanging brackets 21 are detachably connected to the secondary keel 3.

[0042] In a specific embodiment of the present invention, the main keel 2 is connected to the secondary keel 3 via a first hanging bracket 21. The above structure is simple, and the installation and disassembly process is faster and more convenient.

[0043] Furthermore, a sliding notch 211 is provided at the lower end of the first hanging bracket 21 , a sliding block 32 is provided at the top of the secondary keel 3 , and the secondary keel 3 is slidably assembled with the sliding block 32 through the sliding notch 211 .

[0044] During installation, the sliding block 32 on the top of the secondary keel 3 is passed through the sliding notch 211 to achieve the connection between the first hanging bracket 21 and the secondary keel 3; in practical applications, in order to make the structure more solid, multiple main keels 2 are provided, and the positions of the first hanging brackets 21 on the main keels 2 are adapted, and the secondary keel 3 sequentially passes through the first hanging brackets 21 of multiple main keels 2, thereby achieving the assembly of the main keel 2 and the secondary keel 3. The above structure is simple, and is easy to install and disassemble, which can increase the installation speed.

[0045] Specifically, the side wall of the main keel 2 is provided with a plurality of first fixing holes 20 at intervals, the first hanging code 21 is provided with a first through hole 212 and a first fixing code 213, the fixing hook is provided with a second through hole, the position of the first through hole 212 and the position of the second through hole are adapted to the first fixing hole 20, the first fixing code 213 passes through the first through hole 212, the first fixing hole 20 and the second through hole in sequence, and fixes the first hanging code 21 to the main keel 2.

[0046] The first fixed code 213 can refer to Figure 5 The first fixing code 213 is made of bent metal sheets. The first fixing code 213 passes through the first through hole 212, the first fixing hole 20 and the second through hole, and fixes the first hanging code 21 to the main keel 2. With the above structure, the spacing between adjacent secondary keels 3 can be adjusted by selecting the first fixing hole 20 at the corresponding position, so that the ceiling structure is more flexible and can be adapted to different installation environments.

[0047] Optionally, a main keel connection assembly is further included, the main keel connection assembly includes a second hanging bracket 41, a second fixing bracket 42, an angle plate 43 and a fixing bolt 44, the fixing bolt 44 is fixed to the top of the ceiling; the cross section of the angle plate 43 is "L"-shaped, and the side plate of the angle plate 43 in the horizontal direction is fixedly connected to the fixing bolt 44 through a nut; the structure of the second hanging bracket 41 is the same as that of the first hanging bracket 21, and the structure of the second fixing bracket 42 is the same as that of the first fixing bracket 213;

[0048] The second hanging code 41 is hung on the angle plate 43, and the side plates of the angle plate 43 in the vertical direction are provided with a plurality of second fixing holes at intervals. The second hanging code 41 is provided with a third through hole, and the fixing hook of the second hanging code 41 is provided with a fourth through hole. The positions of the third through hole and the fourth through hole are adapted to the second fixing hole. The second fixing code 42 passes through the third through hole, the second fixing hole and the fourth through hole in sequence, and fixes the second hanging code 41 to the angle plate 43.

[0049] The main keel connection assembly is used to connect the building ceiling and the main keel 2. When installing the ceiling structure, the main keel 2 and the auxiliary keel 3 are first assembled to form the main frame of the ceiling, and then the main frame is fixed to the building ceiling through the main keel connection assembly.

[0050] The fixing structure of the second hanging bracket 41 and the second fixing bracket 42 is the same as the fixing structure of the first hanging bracket 21 and the first fixing bracket 213, and will not be described in detail here. The above structure is simple and easy to install. The staff can select the corresponding second fixing hole according to actual needs, so as to flexibly select the installation position of the main keel 2 to meet the installation requirements on site. The cross section of the angle plate 43 is "L" shaped, including the side plate in the horizontal direction and the side plate in the vertical direction. The second hanging bracket 41 is hung on the side plate in the vertical direction through a fixing hook with the same structure as the first hanging bracket 21.

[0051] Specifically, the elastic member 13 is a metal sheet, which includes an integrally formed first connecting portion 131, a first arc-shaped portion 132, a second connecting portion 133, a second arc-shaped portion 134 and a third connecting portion 135, wherein the first connecting portion 131, the second connecting portion 133 and the third connecting portion 135 are respectively connected to the side walls of the connecting frame 12; the metal sheet is in an "m" shape.

[0052] In a specific embodiment of the present invention, the elastic member 13 is specifically an elastic metal sheet, including one of a steel sheet, an aluminum alloy sheet and a copper alloy sheet. The first arc portion 132 and the second arc portion 134 have an arc, and when squeezed, a reaction force will be generated; so that the gusset plate 1 can be tightly pressed against the side wall of the secondary keel 3 when installed in the gusset plate installation area. The first connecting portion 131, the second connecting portion 133 and the third connecting portion 135 are all connected to the connecting frame 12, and the second connecting portion 133 is provided with a fixing through hole, and the second connecting portion 133 is fixed to the connecting frame 12 by bolts.

[0053] In a specific embodiment of the present invention, the connection frame 12 is provided with two elastic members 13 .

[0054] Preferably, the gusset plate body 11 further includes glass wool, and the glass wool is filled in the gusset plate body 11 .

[0055] By adopting the above structure, glass wool is filled in the gusset plate body 11 to achieve the functions of heat insulation, heat preservation, sound insulation and noise reduction, thereby improving the user experience.

[0056] Optionally, the secondary keel 3 includes multiple sections of spliced ​​keels 33 with the same structure, one end of the spliced ​​keel 33 is provided with a connecting female buckle 331, and the other end of the spliced ​​keel 33 is provided with a connecting male buckle 332; the spliced ​​keels 33 are spliced ​​to form the secondary keel 3 by snap-connecting the connecting female buckle 331 with the connecting male buckle 332.

[0057] In a specific embodiment of the utility model, the secondary keel 3 is formed by splicing the splicing keels 33 of the same structure end to end, and the structure of the connecting male buckle 332 and the connecting female buckle 331 can refer to the existing ceiling structure. With the above structure, a sufficient number of splicing keels 33 can be selected according to the size of the ceiling on site. When installing the ceiling structure, the connecting female buckle 331 and the connecting male buckle 332 are snap-connected to form a complete secondary keel 3, so as to prevent the problem of re-cutting due to the inconsistency between the size of the ceiling and the actual length of the secondary keel 3, save the step of cutting the length of the secondary keel 3, and the connection between the connecting female buckle 331 and the connecting male buckle 332 is fast and convenient, reducing the work intensity of workers.

[0058] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A ceiling structure that is easy to disassemble, characterized in that: Including gusset plate, main keel and auxiliary keel; The main keel is arranged along the X-axis, and two or more auxiliary keels are arranged side by side below the main keel along the Y-axis, and the auxiliary keels are detachably connected to the main keel; a connecting plate is extended from the bottom of the auxiliary keel to both sides of the X-axis; two adjacent auxiliary keels form a gusset plate installation area through the connecting plate; The gusset plate comprises a gusset plate body, a connecting frame and an elastic member; the bottom area of ​​the connecting frame is smaller than the gusset plate body; the connecting frame is arranged on the top of the gusset plate body, and both ends of the connecting frame in the X-axis direction are provided with a clearance area; the elastic member is arranged on one side of the connecting frame in the X-axis direction; both sides of the connecting frame in the Y-axis direction extend to the other side of the connecting frame in the X-axis direction, and form a buckling notch with the gusset plate body; The size of the snap-fit ​​notch is adapted to the thickness of the connecting plate, the bottom of the elastic member is against the connecting plate of the secondary keel on one side of the X-axis direction, and the elastic member is tightly against one side of the clip plate mounting area in the X-axis direction; the snap-fit ​​notch is clamped with the connecting plate on the other side of the X-axis direction.

2. The easily disassembled ceiling structure according to claim 1, characterized in that: The main keel is provided with a plurality of first hanging brackets at intervals, the upper ends of the first hanging brackets are bent downward to form fixing hooks, the first hanging brackets are connected to the main keel via the fixing hooks, and the lower ends of the first hanging brackets are detachably connected to the secondary keel.

3. The easily disassembled ceiling structure according to claim 2, characterized in that: A sliding notch is provided at the lower end of the first hanging bracket, a sliding block is provided at the top of the secondary keel, and the secondary keel is slidably assembled with the sliding block through the sliding notch.

4. The easily disassembled ceiling structure according to claim 2, characterized in that: The side wall of the main keel is provided with a plurality of first fixing holes at intervals, the first hanging code is provided with a first through hole and a first fixing code, the fixing hook is provided with a second through hole, the positions of the first through hole and the second through hole are adapted to the first fixing hole, the first fixing code passes through the first through hole, the first fixing hole and the second through hole in sequence, and the first hanging code is fixed to the main keel.

5. The easily disassembled ceiling structure according to claim 2, characterized in that: It also includes a main keel connection assembly, which includes a second hanging bracket, a second fixing bracket, an angle plate and a fixing bolt, wherein the fixing bolt is fixed to the top of the ceiling; the cross section of the angle plate is "L"-shaped, and the side plate of the angle plate in the horizontal direction is fixedly connected to the fixing bolt through a nut; the structure of the second hanging bracket is the same as that of the first hanging bracket, and the structure of the second fixing bracket is the same as that of the first fixing bracket; The second hanging code is hung on the angle plate, and the side plates of the angle plate in the vertical direction are provided with a plurality of second fixing holes at intervals, the second hanging code is provided with a third through hole, and the fixing hook of the second hanging code is provided with a fourth through hole, the positions of the third through hole and the fourth through hole are adapted to the second fixing hole, the second fixing code passes through the third through hole, the second fixing hole and the fourth through hole in sequence, and the second hanging code is fixed to the angle plate.

6. The easily disassembled ceiling structure according to claim 1, characterized in that: The elastic member is a metal sheet, which includes an integrally formed first connecting portion, a first arc-shaped portion, a second connecting portion, a second arc-shaped portion and a third connecting portion, wherein the first connecting portion, the second connecting portion and the third connecting portion are respectively connected to the side walls of the connecting frame; the metal sheet is in an "M" shape.

7. The easily disassembled ceiling structure according to claim 1, characterized in that: The gusset plate body also includes glass wool, and the glass wool is filled in the gusset plate body.

8. The easily disassembled ceiling structure according to claim 1, characterized in that: The secondary keel comprises a plurality of sections of spliced ​​keels with the same structure, one end of the spliced ​​keel is provided with a connecting female buckle, and the other end of the spliced ​​keel is provided with a connecting male buckle; the spliced ​​keels are spliced ​​to form the secondary keel by snap-connecting the connecting female buckle with the connecting male buckle.

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