A multi-layer foamed SPC floor

Abstract

The invention discloses a multi-layer foamed SPC floor, belonging to the technical field of SPC floor. In order to solve the problems of installation trouble and poor connection stability between adjacent floors, the upper connecting piece is plugged and connected inside the lower connecting piece, the upper fixing piece is plugged and connected inside the lower fixing piece, and the upper connecting plate body and the lower connecting plate body are fastened and connected only by pressing from top to bottom, which is fast and convenient to operate, and improves the convenience of installation and the efficiency of decoration construction. The trapezoidal clamp is plugged into the inside of the trapezoidal slot, the side clamping teeth are plugged into the inside of the side slot, the plugging column is plugged into the inside of the column hole, and the top block is plugged into the inside of the side hole, which improves the overall stability during installation. The plugging column can prevent the trapezoidal clamp from coming out of the inside of the trapezoidal slot, and the side clamping teeth can prevent the slide plate from sliding, so as not to cause the shape of the trapezoidal slot to change, thereby ensuring the stability of the connection between the connecting pieces, thereby ensuring the installation effect and the stability of the connection installation of the SPC floor.

Description

Technical Field

[0001] The invention relates to the technical field of SPC floors, and in particular to a multi-layer foamed SPC floor. Background Art

[0002] SPC is the abbreviation of Stone Plastic Composites. It is made by extruding the SPC base material through an extruder combined with a T-die, and then heating, laminating and embossing the PVC wear-resistant layer, PVC color film and SPC base material at one time using a three-roller or four-roller calender. It is a product that does not use glue. It is a new type of environmentally friendly floor developed based on high technology, with the characteristics of zero formaldehyde, fire prevention, insect resistance, and easy installation.

[0003] In the actual application of SPC floor, there are related patents, such as the publication number CN213806361U discloses a multi-layer composite clip-on SPC floor, including an SPC floor substrate, the left and right sides of the SPC floor substrate are respectively provided with mutually cooperating left and right clips, the left clip includes an upper horizontal plate, a first left clip, a first middle short plate, and a second left clip, the right clip includes a lower horizontal plate, a first right clip, a second middle short plate, and a second right clip, and the SPC floor substrate includes an anti-slip layer, a lower wear-resistant layer, an SPC floor layer, a mitigation layer, an upper wear-resistant layer, and a waterproof layer arranged from bottom to top. The beneficial effects of this patent are: the left clip of the SPC floor substrate is connected with the right clip of another SPC floor substrate, which saves the trouble and labor of aligning and laying one by one; the mitigation layer provided on the SPC floor substrate improves its impact resistance.

[0004] The above patent actually has the following problems in actual operation:

[0005] 1. In the process of laying and installing SPC floors, the installation is often troublesome. It is necessary to remove external tools or slide and plug to complete the splicing and installation between different floors. The operation is troublesome, and gaps are prone to water seepage between the floors.

[0006] 2. After the SPC floor is laid and installed, the connection between adjacent floors often becomes loose during use, which makes noise when people walk on the floor and has poor installation stability. Summary of the invention

[0007] The object of the present invention is to provide a multi-layer foamed SPC floor to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: a multi-layer foamed SPC floor, comprising an SPC floor and an edge seal, wherein the SPC floor comprises an upper connecting plate body and a lower connecting plate body, the edge of the upper connecting plate body is fixedly plugged and connected with the edge of the lower connecting plate body, the upper connecting plate body is arranged above the lower connecting plate body, and the edges of the upper connecting plate body and the lower connecting plate body are fixedly plugged and connected with the edge seal;

[0009] The edge sealing member comprises a top edge sealing strip, a bottom edge sealing strip, a top edge sealing corner and a bottom edge sealing corner. The top edge sealing strip and the top edge sealing corner are connected to the outer side of the lower connecting plate body, and the bottom edge sealing strip and the bottom edge sealing corner are connected to the outer side of the upper connecting plate body.

[0010] Furthermore, the upper connecting plate body includes an upper connecting piece, an upper fixing piece and an upper sealing strip. The upper connecting plate body is square in shape as a whole. Four upper fixing pieces are provided. The four upper fixing pieces are respectively provided at the four square corners of the upper connecting plate body. The upper connecting pieces are grouped into four groups of three and there are four groups respectively. A group of upper connecting pieces is respectively provided between two adjacent upper fixing pieces. Upper sealing strips are fixedly connected between each pair of upper connecting pieces in each group.

[0011] Furthermore, the lower connecting plate body includes a lower connecting piece, a lower fixing piece and a lower sealing strip. The lower connecting plate body is square in shape as a whole. There are four lower fixing pieces, which are respectively arranged at the four square corners of the lower connecting plate body. The lower connecting pieces are grouped into four groups of three and there are four groups respectively. A group of lower connecting pieces is respectively arranged between two adjacent lower fixing pieces, and lower sealing strips are fixedly connected between the lower connecting pieces in each group.

[0012] Furthermore, the position at which the upper sealing strip is set matches the lower sealing strip, the upper sealing strip and the lower sealing strip are fitted and connected, the position at which the upper connecting piece is set matches the lower connecting piece, the upper connecting piece is plugged and connected to the inside of the lower connecting piece, and the position at which the upper fixing piece is set matches the lower fixing piece, and the upper fixing piece is plugged and connected to the inside of the lower fixing piece.

[0013] Furthermore, the bottom surface of the upper sealing strip and the top surface of the lower sealing strip are both provided with toothed strips, and the toothed strips on the upper sealing strip are consistent with the toothed strips on the lower sealing strip.

[0014] Furthermore, the upper connecting piece includes an upper connecting block, side slots, a trapezoidal clip, a plug column and a side hole, a trapezoidal clip is fixedly connected to the middle part of the bottom surface of the upper connecting block, side slots are opened on the bottom surface of the upper connecting block on both sides of the trapezoidal clip, a plug column is arranged on the bottom surface of the trapezoidal clip, and side holes are opened on both sides of the plug column; the lower connecting piece includes a lower connecting block, a slide plate, side clamping teeth, a trapezoidal slot, an elastic strip, a column hole, a sliding hole, a top block and a spring, two slide plates are slidably arranged above the lower connecting block, the bottom of the slide plate is connected to the lower connecting block through an elastic strip, a trapezoidal slot is formed between the slide plate and the elastic strip, side clamping teeth are arranged on the top surface of the slide plate, a column hole is opened at the bottom of the trapezoidal slot, sliding holes are opened on both sides of the column hole, a spring is arranged inside the sliding hole, and the end of the spring close to the sliding hole mouth is fixedly connected to the top block.

[0015] Furthermore, the trapezoidal clamping piece is clamped in the trapezoidal clamping slot, the side clamping teeth are clamped in the side clamping slot, the plug post is inserted in the post hole, and the top block is clamped in the side hole.

[0016] Furthermore, the top view shapes of the upper fixing member and the lower fixing member are both isosceles right triangles, a plug is provided at the bottom of the upper fixing member, and a slot is provided on the top surface of the lower fixing member. After the two upper fixing members are butted against each other at an angle, the plug is inserted into the slot of the lower fixing member.

[0017] Furthermore, the overall structure of the top edge strip is the same as the structure of the edge of the upper plate body, the overall structure of the bottom edge strip is the same as the structure of the edge of the lower plate body, the overall structure of the top sealing corner is the same as the upper fixing piece, and the overall structure of the bottom sealing corner is the same as the lower fixing piece.

[0018] Furthermore, a floor body is disposed inside the upper connecting plate body and the lower connecting plate body, and the floor body includes a UV coating, a wear-resistant layer, a decorative layer, a first stabilizing layer, a foaming layer and a second stabilizing layer.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Under the prior art, during the installation of SPC flooring, the installation is often troublesome, and it is necessary to remove external tools or slide and plug to complete the splicing and installation between different floors. The operation is troublesome, and gaps are easily generated between the floors, resulting in water seepage. The upper sealing strip and the lower sealing strip of the present invention are fitted and connected, the upper connecting piece is plugged and connected to the inside of the lower connecting piece, and the upper fixing piece is plugged and connected to the inside of the lower fixing piece. When laying the SPC floor, the upper connecting plate body and the lower connecting plate body are fastened and connected only by pressing from top to bottom. The operation is fast and convenient, and there is no need to use bolts or other tools for splicing. At the same time, there is no need to slide and insert to complete the mortise and tenon connection between the upper connecting plate body and the lower connecting plate body, thereby improving the installation convenience and decoration construction efficiency. The upper sealing strip and the lower sealing strip fit together, and the two are engaged with each other through the toothed strips, thereby improving the sealing effect between the upper sealing strip and the lower sealing strip, preventing water seepage, and increasing the service life of the floor.

[0021] 2. Under the prior art, after the SPC floor is laid and installed, the connection between adjacent floors often becomes loose as it is used, which makes noise when people walk on the floor and has poor installation stability. The trapezoidal clamp of the present invention is clamped into the inside of the trapezoidal slot, the side clamping teeth are clamped into the inside of the side slot, the plug column is inserted into the inside of the column hole, and the top block is clamped into the inside of the side hole. The arrangement of the upper connecting member and the lower connecting member improves the overall stability of the SPC floor during installation. The arrangement of the plug column can prevent the trapezoidal clamp from escaping from the inside of the trapezoidal slot. At the same time, the side clamping teeth on both sides of the trapezoidal clamp are respectively clamped into the two side slots, thereby preventing the slide plate from sliding, thereby not causing the shape of the trapezoidal slot to change, ensuring the stability of the connection between the upper connecting member and the lower connecting member, thereby ensuring the installation effect of the SPC floor and improving the stability of the connection and installation of the SPC floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the SPC floor of the present invention;

[0023] Figure 2 This is a schematic diagram of the decomposed structure of the SPC floor of the present invention;

[0024] Figure 3 It is a schematic diagram of the upper plate structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the lower connecting plate of the present invention;

[0026] Figure 5 It is a schematic structural diagram of the upper and lower connecting members of the present invention in a separated state;

[0027] Figure 6 It is a structural schematic diagram of the upper and lower connecting members of the present invention in connection state;

[0028] Figure 7 It is a schematic structural diagram of the upper and lower fixing parts of the present invention in a separated state;

[0029] Figure 8 It is a schematic diagram of the layered structure of the floor main body of the present invention.

[0030] In the figure: 1, SPC floor; 11, upper connecting plate; 111, upper connecting piece; 1111, upper connecting block; 1112, side card slot; 1113, trapezoidal card; 1114, plug post; 1115, side hole; 112, upper fixing piece; 1121, plug; 113, upper sealing strip; 12, lower connecting plate; 121, lower connecting piece; 1211, lower connecting block; 1212, sliding plate; 1213, side card teeth; 1214, trapezoidal card slot; 1215, spring Strip; 1216, column hole; 1217, sliding hole; 1218, top block; 1219, spring; 122, lower fixing piece; 1221, slot; 123, lower sealing strip; 13, floor body; 131, UV coating; 132, wear-resistant layer; 133, decorative layer; 134, first stabilizing layer; 135, foaming layer; 136, second stabilizing layer; 2, edge sealing piece; 21, top edge sealing strip; 22, bottom edge sealing strip; 23, top corner sealing; 24, bottom corner sealing. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-2 A multi-layer foamed SPC floor comprises an SPC floor 1 and an edge sealing member 2. The SPC floor 1 comprises an upper connecting plate body 11 and a lower connecting plate body 12. The edge of the upper connecting plate body 11 is fixedly plugged and connected with the edge of the lower connecting plate body 12. The upper connecting plate body 11 is arranged above the lower connecting plate body 12. The edge of the upper connecting plate body 11 and the edge of the lower connecting plate body 12 are fixedly plugged and connected with the edge of the edge sealing member 2; the edge sealing member 2 comprises a top edge sealing strip 21, a bottom edge sealing strip 22, a top edge sealing corner 23 and a bottom edge sealing corner 24. The top edge sealing strip 21 and the top edge sealing corner 23 are connected to the outer side of the lower connecting plate body 12, and the bottom edge sealing strip 22 and the bottom edge sealing corner 24 are connected to the outer side of the upper connecting plate body 11.

[0033] Specifically, when laying the SPC floor 1, the lower connecting plate body 12 is laid on the installation ground, the upper connecting plate body 11 is laid at the edge adjacent to the lower connecting plate body 12, the edge of the upper connecting plate body 11 is spliced ​​with the edge of the lower connecting plate body 12, and the edges of the upper connecting plate body 11 and the lower connecting plate body 12 that are not spliced ​​with each other are sealed by the edge sealing member 2.

[0034] In order to solve the technical problems of SPC floor installation, which is often difficult to install, requires the removal of external tools or sliding plugs to complete the splicing and installation between different floors, and is difficult to operate, and it is easy to have gaps between floors and cause water seepage, please refer to Figure 3-4 , the present invention provides the following technical solutions:

[0035] The upper connecting plate body 11 includes an upper connecting piece 111, an upper fixing piece 112 and an upper sealing strip 113. The upper connecting plate body 11 is square in shape as a whole. Four upper fixing pieces 112 are provided. The four upper fixing pieces 112 are respectively arranged at the four square corners of the upper connecting plate body 11. The upper connecting pieces 111 are grouped into four groups of three, and a group of upper connecting pieces 111 is respectively arranged between two adjacent upper fixing pieces 112. The upper sealing strips 113 are fixedly connected between each pair of the upper connecting pieces 111 in each group. The lower connecting plate body 12 includes a lower connecting piece 121, a lower fixing piece 122 and a lower sealing strip 123. The lower connecting plate body 12 is square in shape as a whole. There are four lower fixing pieces 122, which are respectively arranged at the four square corners of the lower connecting plate body 12. There are four groups of three lower connecting pieces 121, and one group of lower connecting pieces 121 is respectively arranged between two adjacent lower fixing pieces 122. The lower connecting pieces 121 in each group are fixedly connected with lower sealing strips 123.

[0036] The position where the upper sealing strip 113 is set matches the lower sealing strip 123, and the upper sealing strip 113 and the lower sealing strip 123 are closely connected, the position where the upper connecting piece 111 is set matches the lower connecting piece 121, and the upper connecting piece 111 is plugged and connected inside the lower connecting piece 121, and the position where the upper fixing piece 112 is set matches the lower fixing piece 122, and the upper fixing piece 112 is plugged and connected inside the lower fixing piece 122. The bottom surface of the upper sealing strip 113 and the top surface of the lower sealing strip 123 are both provided with toothed strips, and the toothed strips on the upper sealing strip 113 match the toothed strips on the lower sealing strip 123.

[0037] Specifically, when laying the SPC floor 1, the upper sealing strip 113 and the lower sealing strip 123 are fitted and connected, the upper connecting member 111 is plugged and connected to the inside of the lower connecting member 121, and the upper fixing member 112 is plugged and connected to the inside of the lower fixing member 122, so as to fasten the upper connecting plate body 11 and the lower connecting plate body 12, and it only needs to be pressed from top to bottom, which is fast and convenient to operate, and there is no need to use bolts or other tools for splicing, and there is no need for sliding insertion to complete the mortise and tenon connection of the upper connecting plate body 11 and the lower connecting plate body 12, thereby improving the installation convenience and decoration construction efficiency. The upper sealing strip 113 and the lower sealing strip 123 are fitted together, and the two are engaged with each other through the toothed strips, thereby improving the sealing effect between the upper sealing strip 113 and the lower sealing strip 123, preventing water seepage, and increasing the service life of the floor.

[0038] In order to solve the problem that after the SPC floor is laid and installed, the connection between adjacent floors often becomes loose during use, which makes people walk on the floor and makes noise. The installation stability is poor. Please refer to Figure 5-6 , the present invention provides the following technical solutions:

[0039] The upper connecting member 111 includes an upper connecting block 1111, a side slot 1112, a trapezoidal clamp 1113, a plug post 1114 and a side hole 1115. The middle part of the bottom surface of the upper connecting block 1111 is fixedly connected with the trapezoidal clamp 1113. The bottom surface of the upper connecting block 1111 is provided with side slots 1112 on both sides of the trapezoidal clamp 1113. The bottom surface of the trapezoidal clamp 1113 is provided with a plug post 1114. The two sides of the plug post 1114 are provided with side holes 1115. The lower connecting member 121 includes a lower connecting block 1211, a slide plate 1212, a side clamping tooth 1213, a trapezoidal slot 1214, an elastic strip 1215, a column hole 1216, a sliding hole 1217, a top block 1218 and a spring 1219, two slide plates 1212 are slidably arranged above the lower connecting block 1211, the bottom of the slide plate 1212 is connected to the lower connecting block 1211 through an elastic strip 1215, a trapezoidal slot 1214 is formed between the slide plate 1212 and the elastic strip 1215, a side clamping tooth 1213 is arranged on the top surface of the slide plate 1212, a column hole 1216 is provided at the bottom of the trapezoidal slot 1214, sliding holes 1217 are provided on both sides of the column hole 1216, a spring 1219 is arranged inside the sliding hole 1217, and a top block 1218 is fixedly connected to one end of the spring 1219 close to the opening of the sliding hole 1217. The trapezoidal clamping piece 1113 is clamped in the trapezoidal clamping slot 1214 , the side clamping teeth 1213 are clamped in the side clamping slot 1112 , the plug post 1114 is inserted in the post hole 1216 , and the top block 1218 is clamped in the side hole 1115 .

[0040] Specifically, when laying the SPC floor 1, when the upper connecting piece 111 and the lower connecting piece 121 are plugged, the upper connecting piece 111 is pressed from above to the lower connecting piece 121, and the trapezoidal clamping piece 1113 presses the slide plate 1212 downward, and the elastic strip 1215 is deformed by the pressure and moves to both sides, while pushing the slide plate 1212 to both sides, and with the increase of the distance between the slide plates 1212, the trapezoidal clamping piece 1113 moves downward and slides into the trapezoidal clamping groove 1214, and the trapezoidal clamping piece 1113 scratches the slide plate 1212. After insertion, the extrusion of the slide plate 1212 by the trapezoidal clamp 1113 is released, the slide plate 1212 is reset, the trapezoidal clamp 1113 completes the clamping, and at the same time, the two side clamping teeth 1213 are respectively clamped in the inside of the side clamping groove 1112, along with the clamping of the trapezoidal clamp 1113, the plug post 1114 is downwardly inserted into the inside of the column hole 1216, and under the action of the spring 1219, the top block 1218 slides along the sliding hole 1217 and is clamped into the inside of the side hole 1115, thereby forming a triple clamping connection between the upper connecting member 111 and the lower connecting member 121.

[0041] The arrangement of the upper connecting member 111 and the lower connecting member 121 improves the overall stability of the SPC floor 1 during installation. The arrangement of the plug 1114 can prevent the trapezoidal clamp 1113 from escaping from the trapezoidal slot 1214. At the same time, the side clamping teeth 1213 on both sides of the trapezoidal clamp 1113 are respectively clamped in the two side slots 1112, thereby preventing the slide plate 1212 from sliding, thereby not causing the shape of the trapezoidal slot 1214 to change, ensuring the stability of the connection between the upper connecting member 111 and the lower connecting member 121, thereby ensuring the installation effect of the SPC floor 1 and improving the stability of the connection and installation of the SPC floor 1.

[0042] See also Figure 7 The top view shapes of the upper fixing member 112 and the lower fixing member 122 are both isosceles right triangles. A plug 1121 is provided at the bottom of the upper fixing member 112, and a slot 1221 is provided on the top surface of the lower fixing member 122. After the two upper fixing members 112 are butted against each other at an angle, the plug 1121 is inserted into the slot 1221 of the lower fixing member 122.

[0043] Specifically, when laying the SPC floor 1, after the two lower fixing members 122 are butted against each other at an angle, the two slots 1221 are spliced, and the size of the spliced ​​slots 1221 matches the size of the plugs 1121. After the two upper fixing members 112 are butted against each other at an angle, the two plugs 1121 are spaced a certain distance apart. When plugging in, the two plugs 1121 are subjected to the pressure at the entrance of the slots 1221 and deform inwardly. As the slots 1221 are inserted as a whole, the deformation of the slots 1221 is released and reset, thereby realizing the plugging in between the upper fixing member 112 and the lower fixing member 122.

[0044] See also Figure 2The overall structure of the top sealing strip 21 is the same as the structure of the edge of the upper plate body 11, the overall structure of the bottom sealing strip 22 is the same as the structure of the edge of the lower plate body 12, the overall structure of the top sealing corner 23 is the same as the upper fixing piece 112, and the overall structure of the bottom sealing corner 24 is the same as the lower fixing piece 122.

[0045] Specifically, when the SPC floor 1 is laid, the edges where the upper plate body 11 and the lower plate body 12 are not spliced ​​to each other are sealed by the top edge strip 21, the bottom edge strip 22, the top edge corner 23 and the bottom edge corner 24.

[0046] See also Figure 8 A floor body 13 is disposed inside the upper connecting plate body 11 and the lower connecting plate body 12 . The floor body 13 includes a UV coating 131 , a wear-resistant layer 132 , a decorative layer 133 , a first stabilizing layer 134 , a foaming layer 135 and a second stabilizing layer 136 .

[0047] Specifically, the main material of the wear-resistant layer 132 is PVC resin, which is made through a calendering process using field plasticizers, lubricants and stabilizers. The decorative layer 133 is a PVC film with patterns printed on the surface. The first stabilizing layer 134 and the second stabilizing layer 136 are respectively arranged on both sides of the foaming layer 135. The thickness of the first stabilizing layer 134 and the second stabilizing layer 136 are both 1 to 5 mm, and the thickness of the foaming layer is 2 to 10 mm.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-layer foamed SPC floor, comprising an SPC floor (1) and an edge sealing member (2), characterized in that: The SPC floor (1) comprises an upper connecting plate body (11) and a lower connecting plate body (12), the edge of the upper connecting plate body (11) is fixedly plugged into the edge of the lower connecting plate body (12), the upper connecting plate body (11) is arranged above the lower connecting plate body (12), and the edges of the upper connecting plate body (11) and the lower connecting plate body (12) are fixedly plugged into an edge sealing member (2); The edge sealing member (2) comprises a top edge sealing strip (21), a bottom edge sealing strip (22), a top edge sealing corner (23) and a bottom edge sealing corner (24); the top edge sealing strip (21) and the top edge sealing corner (23) are connected to the outer side of the lower connecting plate body (12), and the bottom edge sealing strip (22) and the bottom edge sealing corner (24) are connected to the outer side of the upper connecting plate body (11); The upper connecting plate body (11) comprises an upper connecting piece (111), an upper fixing piece (112) and an upper sealing strip (113); the upper connecting plate body (11) is square in shape as a whole; four upper fixing pieces (112) are provided; the four upper fixing pieces (112) are respectively provided at four square corners of the upper connecting plate body (11); three upper connecting pieces (111) are provided in four groups; one group of upper connecting pieces (111) is provided between two adjacent upper fixing pieces (112); and upper sealing strips (113) are fixedly connected between each of the upper connecting pieces (111) in each group; The lower connecting plate body (12) comprises a lower connecting piece (121), a lower fixing piece (122) and a lower sealing strip (123); the lower connecting plate body (12) is square in shape as a whole; four lower fixing pieces (122) are provided; the four lower fixing pieces (122) are respectively provided at four square corners of the lower connecting plate body (12); three lower connecting pieces (121) are provided in four groups; one group of lower connecting pieces (121) is provided between two adjacent lower fixing pieces (122); and lower sealing strips (123) are fixedly connected between each pair of lower connecting pieces (121) in each group; The position at which the upper sealing strip (113) is arranged matches the lower sealing strip (123), the upper sealing strip (113) and the lower sealing strip (123) are fitted and connected to each other, the position at which the upper connecting piece (111) is arranged matches the lower connecting piece (121), the upper connecting piece (111) is plug-connected inside the lower connecting piece (121), the position at which the upper fixing piece (112) is arranged matches the lower fixing piece (122), and the upper fixing piece (112) is plug-connected inside the lower fixing piece (122); The upper connecting member (111) comprises an upper connecting block (1111), a side clamping groove (1112), a trapezoidal clamping member (1113), a plugging column (1114) and a side hole (1115); the middle part of the bottom surface of the upper connecting block (1111) is fixedly connected to the trapezoidal clamping member (1113); the bottom surface of the upper connecting block (1111) is provided with a side clamping groove (1112) on both sides of the trapezoidal clamping member (1113); the bottom surface of the trapezoidal clamping member (1113) is provided with a plugging column (1114); and the side holes (1115) are provided on both sides of the plugging column (1114); the lower connecting member (121) comprises a lower connecting block (1211), a slide plate (1212), a side clamping tooth (1213), a trapezoidal clamping groove (1214), an elastic strip (1215), a column hole (1216), A sliding hole (1217), a top block (1218) and a spring (1219) are provided. Two sliding plates (1212) are slidably arranged above the lower connecting block (1211). The bottom of the sliding plate (1212) is connected to the lower connecting block (1211) through an elastic strip (1215). A trapezoidal slot (1214) is formed between the sliding plate (1212) and the elastic strip (1215). A side clamping tooth (1213) is arranged on the top surface of the sliding plate (1212). A column hole (1216) is provided at the bottom of the trapezoidal slot (1214). Both sides of the column hole (1216) are provided with sliding holes (1217). A spring (1219) is arranged inside the sliding hole (1217). One end of the spring (1219) close to the opening of the sliding hole (1217) is fixedly connected to the top block (1218).

2. A multi-layer foamed SPC floor as claimed in claim 1, characterized in that: The bottom surface of the upper sealing strip (113) and the top surface of the lower sealing strip (123) are both provided with toothed strips, and the toothed strips on the upper sealing strip (113) match the toothed strips on the lower sealing strip (123).

3. The multi-layer foamed SPC floor according to claim 1, characterized in that: The trapezoidal clamping piece (1113) is clamped inside the trapezoidal clamping slot (1214), the side clamping teeth (1213) are clamped inside the side clamping slot (1112), the plug post (1114) is inserted inside the post hole (1216), and the top block (1218) is clamped inside the side hole (1115).

4. The multi-layer foamed SPC floor according to claim 1, characterized in that: The upper fixing member (112) and the lower fixing member (122) are both isosceles right triangles in top view; a plug (1121) is provided at the bottom of the upper fixing member (112); a slot (1221) is provided on the top surface of the lower fixing member (122); and after the two upper fixing members (112) are butted against each other at an angle, the plug (1121) is inserted into the slot (1221) of the lower fixing member (122).

5. The multi-layer foamed SPC floor according to claim 1, characterized in that: The overall structure of the top edge seal strip (21) is the same as the structure of the edge of the upper plate body (11), the overall structure of the bottom edge seal strip (22) is the same as the structure of the edge of the lower plate body (12), the overall structure of the top edge seal corner (23) is the same as the upper fixing piece (112), and the overall structure of the bottom edge seal corner (24) is the same as the lower fixing piece (122).

6. The multi-layer foamed SPC floor according to claim 1, characterized in that: A floor main body (13) is disposed inside the upper connecting plate body (11) and the lower connecting plate body (12), and the floor main body (13) comprises a UV coating (131), a wear-resistant layer (132), a decorative layer (133), a first stabilizing layer (134), a foaming layer (135), and a second stabilizing layer (136).

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