Panel and application thereof

Abstract

The invention relates to the technical field of decorative plates, in particular to a panel and application thereof.The panel is in a rectangular shape with a pair of longitudinal long edges and a pair of transverse short edges, a mechanical locking system is arranged on the longitudinal long edges, and a magnetic attraction locking system is arranged on the transverse short edges; the magnetic attraction locking system comprises magnetic attraction edges which are arranged on the side face of the transverse short edge and correspond to each other in position, at least one side of each magnetic attraction edge is provided with an attaching edge used for increasing static friction force in the vertical direction, and the edge length of the side face of the transverse short edge is larger than the thickness of the panel. The mechanical locking system and the magnetic attraction locking system are arranged on the side edge of the panel at the same time, on the premise that the connection stability is guaranteed, the mounting and dismounting difficulty can be greatly reduced, and therefore the mounting efficiency is effectively improved, and the risk of mounting errors is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of decorative boards, and particularly to a panel and its application. Background Art

[0002] Floor panels are a type of material used for floor decoration, often made of wood or artificial materials. They are designed to be joined together to cover the entire floor, creating an aesthetically pleasing and durable surface. Due to the natural beauty and texture of solid wood floors, while also possessing stability and durability, floor panels are widely used in the floor laying of homes, commercial and public places.

[0003] The connection of floor panels is the key to ensuring the firm and durable floor decoration. Appropriate connection methods can ensure the tight connection between floor panels, preventing loosening or gaps. Suitable connection methods can also simplify the installation process and improve work efficiency.

[0004] Currently, the connection methods of floor panels include floating splicing, adhesive splicing, tenon and mortise splicing, locking connection systems, and nailing connection, etc.

[0005] Floating splicing is one of the most common methods. For example, the patent CN 116420001 A discloses a design and manufacturing method of floor panels, whose edges are equipped with protruding tenon grooves and grooves, enabling them to be embedded and connected to each other. This connection method is simple and easy to implement, but if the connection is not firm or the installation is incorrect, it may lead to gaps or loosening between floor panels, making the floor unstable.

[0006] Adhesive splicing, for example, the patent CN115298403A discloses a tile panel and a surface covering composed of multiple adjacent tile panels, which requires professional personnel during the installation process, and disassembly and replacement are also relatively difficult. The selection and correct use of glue are crucial, otherwise the connection may be insecure, deformed or fall off. In addition, adhesive connection poses certain challenges to environmental friendliness because some glues may contain harmful substances.

[0007] Tenon and mortise splicing requires more processes and techniques. Improper installation may cause gaps, deformation or loosening between floor panels. In addition, the tenon and mortise connection method has higher requirements for materials, which may increase production costs.

[0008] Locking connection systems, for example, the patent CN116490658A discloses a building panel with first and second locking systems, providing a more firm and stable splicing method, but during installation, it is necessary to ensure the correct alignment of the locking connection and apply appropriate force. Otherwise, the connection may be unstable or damaged. In addition, the design and production of locking connection systems also require a higher technical level and cost.

[0009] Nailing connection is a traditional connection method, which fixes floor panels to the ground by using nails. However, this connection method may cause damage to the floor panels, loosening and rusting of the nails, and is not applicable to some special materials.

[0010] Therefore, the research and improvement of floor panel connection is an urgent need. We need to find a connection method that can ensure the structural stability and service life of the floor, while also taking into account the aesthetic effect and environmental protection requirements. The new generation of connection methods should have the characteristics of easy installation and detachable, be able to adapt to various climate changes and usage environments, and be able to solve the connection strength problem of thinner floor panels.

[0011] However, due to the increasingly strict ecological requirements and the motivation of saving materials, weight and energy, thinner floor panels are required. However, thinner floor panels will inevitably bring some challenges. Especially in the connection structure, thinner floor panels mean that the connection part is also smaller and thinner, which may lead to a problem of reduced connection strength. In this case, we need to seek new connection methods and structural designs to ensure the stability and firmness of the connection. Summary of the Invention

[0012] The present invention is to overcome the challenge of reduced connection strength brought by the existing panels in the face of increasingly strict ecological requirements and the demand for thinner floor panels, and provides a panel with stronger connection stability and firmness and its application to overcome the above deficiencies.

[0013] In a first aspect, the present invention first provides a panel, The panel is in a rectangular shape with a pair of longitudinal long sides and a pair of transverse short sides; A mechanical locking system is provided on the longitudinal long sides, and the mechanical locking system allows two of the panels to be joined to each other along the longitudinal long sides; a magnetic locking system is provided on the transverse short sides, and the magnetic locking system allows two of the panels to be joined to each other along the transverse short sides; Wherein, the magnetic locking system includes magnetic edges arranged at corresponding positions on the side surfaces of the transverse short sides, and at least one side of the magnetic edges is provided with a fitting edge for increasing the static friction in the vertical direction, and the length of the side edge of the transverse short side is greater than the thickness of the panel.

[0014] For the panels in the prior art, mechanical locking systems are respectively provided at the long sides and short sides, so that the mechanical properties of the installed panels are more excellent and not easily deformed. However, this dual mechanical locking system has the following defects: (1) Difficult installation. Generally speaking, during the installation process of the panel, it is usually necessary to first lock the long side of the panel through the locking system located at the long side of the panel. However, after locking the long side, it will be difficult for the locking system at the short side of the panel to be correctly aligned and positioned. Therefore, if a mechanical locking system is set on each edge, it may increase the complexity of the installation. To ensure the correct alignment and positioning of the mechanical locking system on each edge, more time and effort may be required. This may lead to a complex and error-prone installation process.

[0015] (2) Increased cost. Using a mechanical locking system on each edge may increase the manufacturing cost. Each edge needs to have components of the mechanical locking system, which may increase the material and production costs. In addition, a more complex design may also lead to higher processing and assembly costs.

[0016] (3) Design limitations. Setting a mechanical locking system on each edge may impose limitations on the design and appearance of the panel. The components of these mechanical locking systems require space, so sufficient space may need to be vacated in the design. This may limit the design flexibility of the panel and may impose limitations on some special designs.

[0017] (4) Difficult maintenance and replacement. Having a mechanical locking system on each edge may increase the difficulty of maintenance and replacement. If the panel needs to be replaced or repaired, more tools and steps may be required to disassemble and reinstall the mechanical locking system on each edge. This may increase the time and cost of maintenance and repair.

[0018] The difference between this application and the panel structure in the prior art is that a mechanical locking system is only set on the longitudinal long side of the panel, while a magnetic locking system is set on the transverse short side, so that through the cooperation between the mechanical locking system and the magnetic locking system, two panels are allowed to be joined to each other along the edge of the panel. This design method has the following beneficial effects: (1) By only setting the mechanical locking system on the long side, the present invention can simplify the installation process. The installer only needs to align and lock the long side of the panel, without the need for complex positioning and adjustment on the short side, which can improve the installation efficiency and reduce the risk of installation errors.

[0019] (2) Compared with setting a mechanical locking system on each edge, only setting the mechanical locking system on the long side can reduce the material and production costs. The magnetic locking system is relatively simple and low-cost, while the mechanical locking system may require more complex components and processing techniques.

[0020] (3) Limiting the mechanical locking system to the long side can provide greater design flexibility. The magnetic locking system on the short side is relatively small and inconspicuous, which can better maintain the overall appearance and aesthetics of the panel.

[0021] (4) Using a mechanical locking system only at the long sides can facilitate maintenance and replacement of the panels. If the panels need to be replaced or repaired, only the mechanical locking system at the long sides needs to be dealt with, without involving the magnetic locking system at the short sides. This can simplify the maintenance process and reduce time and costs.

[0022] In addition, for the magnetic locking system, the magnetic locking system in the present application includes magnetic edges and fitting edges which are arranged at the side surfaces of the transverse short sides and correspond to each other in position, and the length of the edge of the transverse short side surface is greater than the thickness of the panel. This way can provide a larger connection area and increase the connection stability. The longer side edge can provide better support and connection force, reducing the risk of the panel moving or separating in the transverse direction. In addition, the longer side edge can provide better earthquake resistance when the floor is subjected to impact or vibration. Since the edge length is greater than the panel thickness, it can better absorb and disperse the impact force, reducing the possibility of the floor loosening or cracking. The design with the edge length greater than the panel thickness can hide the connection components, so the connection system can be installed inside the edge and made invisible, thus maintaining the neatness and continuity of the floor surface and improving the aesthetics of the floor. Finally, the longer side edge can increase the strength of the overall structure. By extending the edge beyond the panel thickness, additional structural support can be provided, making the floor more solid and stable.

[0023] Preferably, an angle other than 0 degrees and 90 degrees is formed between the magnetic edge and the horizontal plane.

[0024] Preferably, the projection of the magnetic edge in the vertical direction accounts for 20% - 95% of the panel thickness.

[0025] Certain design principles need to be followed in the design process of the magnetic locking system. The most important point is the stability of magnetic adsorption and the detachable performance of the panel. The inventor found in actual tests that the ratio between the projection length of the magnetic edge in the vertical direction and the panel thickness has a significant correlation with the mechanical properties of the final product.

[0026] In the present application, making the projection of the magnetic edge in the vertical direction account for 20% - 95% of the panel thickness can bring the following benefits: Strong adsorption force. A larger projection area can increase the adsorption force of the magnetic edge. A larger contact area can provide stronger adsorption force, enabling the panel to adhere more firmly to the ground or other surfaces, reducing the risk of movement or loosening.

[0027] Improve stability. By increasing the projection area of the magnetic edge, the stability of the panel can be improved. A larger contact area can provide better support and connection force, reducing the possibility of the panel shaking or tilting in the vertical direction.

[0028] It is convenient to disassemble and replace. The appropriate magnetic adsorption edge projection area can maintain a high adsorption force, and at the same time, it is also convenient to disassemble and replace the panel. When it is necessary to remove or replace the panel, the larger projection area can provide sufficient adsorption force but not be too difficult. This makes the maintenance and replacement work more convenient.

[0029] Aesthetics and concealment. Since the projection area of the magnetic adsorption edge can be designed to occupy 20% - 95% of the panel thickness, the magnetic adsorption edge can be designed to be smaller and more concealed. This can keep the surface of the panel clean and continuous, and improve the aesthetics of the floor.

[0030] However, it should be noted that the projection area of the magnetic adsorption edge in the vertical direction should not be too small or too large. Too small a projection area may result in insufficient adsorption force and cannot provide sufficient stability. Too large a projection area may increase the difficulty of disassembly and replacement, and may also affect the appearance of the floor.

[0031] Preferably, the magnetic adsorption edge includes a first magnetic adsorption strip embedded in the lateral short side of one side of the panel for providing magnetism, and a second magnetic adsorption strip or a metal sheet embedded in the lateral short side of the other side of the panel and magnetically matched with the first magnetic adsorption strip.

[0032] In this application, the adsorption between the magnetic adsorption strip and the metal sheet, or the adsorption between two magnetic adsorption strips, can effectively reduce the design difficulty of the magnetic adsorption locking system, and at the same time can effectively reduce the manufacturing cost of the magnetic adsorption locking system.

[0033] Preferably, a receiving groove for receiving the first magnetic adsorption strip, the second magnetic adsorption strip or the metal sheet is provided on the lateral short side of the panel.

[0034] In this application, a receiving groove for receiving the first magnetic adsorption strip, the second magnetic adsorption strip or the metal sheet is first opened on the lateral short side of the panel, so that the magnetic adsorption edge can be embedded inside the receiving groove, thereby ensuring the flatness of the side of the lateral short side of the panel.

[0035] Preferably, the fitting edge is a vertical edge, and a vertical edge is provided at each of the upper and lower ends of the magnetic adsorption edge.

[0036] The setting of the vertical edges can increase the stability of the magnetic adsorption edges. They can provide additional support and connection force to help fix the position of the panel in the vertical direction. This helps to reduce the wobbling or loosening of the panel and provides a more stable floor surface. At the same time, the presence of the vertical edges can prevent the magnetic adsorption edges from shifting or tilting in the vertical direction. They provide boundaries and limitations to ensure that the magnetic adsorption edges always remain in the correct position. This can increase the stability and safety of the floor. In addition, the setting of the vertical edges can strengthen the strength and durability of the magnetic adsorption edges. They can prevent the magnetic adsorption edges from bending excessively or being overloaded in the vertical direction, thereby extending their service life and reducing the risk of damage. Finally, the setting of the vertical edges can enhance the aesthetic appearance of the floor. They can hide the connection part of the magnetic adsorption edges, making the floor surface cleaner and more continuous. This helps to create a more aesthetically pleasing floor appearance.

[0037] Preferably, the Ra value of the surface roughness of the fitting edge is greater than 1 μm.

[0038] Preferably, a first elastic layer that can deform under an external force is provided on the surface of the fitting edge; A deformation cavity for accommodating the deformation of the first elastic layer is further provided on the short transverse side of the panel.

[0039] Shock absorption and sound insulation performance are of extremely important significance for the floor. In this application, by providing a first elastic layer that can deform under an external force on the surface of the fitting edge and providing a deformation cavity on the short transverse side of the panel, the following benefits can be achieved: (1) The first elastic layer can deform under an external force to shock-absorb and buffer the impact force. It can absorb the impact or vibration received by the floor, reduce the damage to the floor material, and at the same time provide a more comfortable walking experience. (2) The deformation cavity can accommodate the deformation of the first elastic layer, thereby reducing the stress concentration on the floor surface. This helps to extend the service life of the floor and reduce the cracking or damage caused by external forces. (3) The design of the first elastic layer and the deformation cavity can improve the comfort of the human body when walking on the floor. By reducing the impact and pressure on the feet from the floor, they can reduce the foot fatigue and provide a softer stepping feeling. (4) The design of the first elastic layer and the deformation cavity can also reduce noise and vibration. They can absorb and reduce the noise and vibration transmission generated by the floor and provide a quieter and more comfortable environment.

[0040] In order to achieve better shock absorption and sound insulation effects, the first elastic layer can be selected to use high-damping rubber materials, such as silicone rubber, ethylene propylene rubber, natural rubber, styrene butadiene rubber, nitrile rubber, etc. These rubber materials all have certain elastic and damping properties, can effectively shock-absorb and absorb the impact force, and reduce noise and vibration.

[0041] Preferably, a set of clamping components is further provided on one side of the transverse short side close to the magnetic attraction locking system; The clamping components include a clamping groove provided on one side of the transverse short side, and a clamping head provided on the other side of the transverse short side and used for cooperating with the clamping groove.

[0042] In the present invention, a set of clamping components is further provided on one side of the transverse short side close to the magnetic attraction locking system, so that in addition to the magnetic attraction locking system at the transverse short side of the panel, a set of mechanical locking systems is added, effectively improving the connection strength of the panel at the transverse short side and preventing the panel from disintegrating due to external force impact at the transverse short side.

[0043] Preferably, the width of the clamping groove is greater than the width of the clamping head, so that a first buffer seam is formed between the clamping groove and the clamping head on the side away from the magnetic attraction locking system.

[0044] The existence of the first buffer seam can play a buffering role. When there is a certain gap between the clamping head and the clamping groove, it can to a certain extent reduce the direct transmission of external impact or vibration to the clamping groove. This buffering effect can protect the clamping groove and the clamping head, reducing damage or destruction caused by external forces. In the case of accidental impact or vibration, the first buffer seam can absorb part of the impact force, reduce the impact on the panel structure, and thus reduce the risk of accidental disintegration of the panel. In addition, since the width of the clamping groove is greater than the width of the clamping head, the clamping head can be relatively easily inserted and removed.

[0045] Preferably, a buffer edge recessed into the transverse short side is further provided below the joint edge on the other side of the transverse short side close to the magnetic attraction locking system. A second buffer seam is formed between the buffer edges after the two panels are joined to each other along the transverse short side.

[0046] Preferably, the mechanical locking system includes a mortise groove provided on one longitudinal long side, and a tenon head provided on the other longitudinal long side and capable of being adapted to the mortise groove.

[0047] Preferably, the mortise groove includes a mortise groove cavity extending obliquely from the side surface of the longitudinal long side to the upper surface of the panel. An arc-shaped guiding edge with a smooth transition is provided from the lower opening of the mortise groove cavity to the top of the mortise groove cavity. A limiting portion for restricting the displacement of the tenon head from the mortise groove cavity is provided at the upper end of the mortise groove cavity close to its opening.

[0048] In this application, the design of the mortise and tenon can achieve a stable connection. The tenon fits into the mortise cavity to form a tight connection, enabling the panel to be firmly locked in the longitudinal long side direction and not prone to loosening or displacement. Moreover, the tenon can be easily inserted into the mortise cavity, and its displacement is restricted by the limiting part, thus realizing fast and reliable installation and disassembly operations. The smooth transition arc-shaped guiding edge at the top of the mortise cavity helps to achieve a smooth connection process. It can make it easier for the tenon to find the correct position when inserted into the mortise cavity and reduce damage or instability caused by improper insertion.

[0049] Preferably, the distance between the top of the mortise cavity and the bottom of the limiting part is at least 1 / 10 - 1 / 5 of the thickness of the panel.

[0050] The applicant found in actual tests that the distance between the top of the mortise cavity and the bottom of the limiting part is highly correlated with the tightness of the connection between two adjacent panels. When the distance between the top of the mortise cavity and the bottom of the limiting part is less than 1 / 10 of the thickness of the panel, the connection between the two panels is closer to a butt joint, resulting in lower connection strength after the two panels are connected. However, if the distance between the top of the mortise cavity and the bottom of the limiting part is greater than 1 / 5 of the thickness of the panel, it will be more difficult to connect the two panels. Therefore, when the distance between the top of the mortise cavity and the bottom of the limiting part is at least 1 / 10 - 1 / 5 of the thickness of the panel, good connection strength and assembly simplicity can be achieved simultaneously.

[0051] Preferably, a first error tolerance cavity recessed towards the lower surface of the panel is provided at the arc-shaped guiding edge near the opening of the mortise cavity; A second error tolerance cavity recessed towards the upper surface of the panel is provided on the side of the limiting part close to the arc-shaped guiding edge.

[0052] During the mating process of the mechanical locking system, the tenon and mortise need to be precisely mated to ensure the quality and performance stability of their connection. The existence of the first error tolerance cavity and the second error tolerance cavity in this application can improve the error tolerance of the mechanical locking system. When the tenon is inserted into the mortise, if the insertion position is slightly deviated, the error tolerance cavity can accommodate this deviation and enable the tenon to be correctly positioned. This can reduce the precision requirements during installation, improve the error tolerance and convenience of installation. At the same time, the concave design of the error tolerance cavity helps to reduce the risk of damage caused by incorrect insertion. If the insertion position of the tenon is deviated greatly, the error tolerance cavity can prevent the tenon from directly contacting the lower surface or the upper surface of the panel, reducing possible wear or damage. The design of the error tolerance cavity can also improve the installation efficiency. Since the error tolerance cavity can accommodate the deviation of the insertion position, it is easier for the installer to find the correct insertion position during installation, reducing the adjustment and correction time of installation and improving the installation efficiency. Finally, the existence of the error tolerance cavity can increase the connection stability of the mechanical locking system. When the tenon is inserted into the correct position, the error tolerance cavity will provide support and a stable connection to prevent the tenon from loosening or displacing during use.

[0053] Preferably, the upper and lower ends of the longitudinal long side of the panel on the side provided with the mortise are respectively transitioned through a first convex arc and a second convex arc at the opening of the mortise; The upper and lower ends of the longitudinal long side of the panel on the side provided with the tenon are respectively transitioned through a first concave arc and a second concave arc at the tail of the tenon; The first convex arc is adapted to the shape of the first concave arc, and the second convex arc is adapted to the shape of the second concave arc, so that two adjacent panels can rotate along the contact surface of the first convex arc and the first concave arc.

[0054] Preferably, an insertion joint extending into the error tolerance cavity is further provided on one side of the tenon close to the error tolerance cavity.

[0055] The setting of the insertion joint can effectively improve the connection strength between the tenon and the mortise after the tenon is inserted into the mortise.

[0056] Preferably, when the two panels are joined to each other along the longitudinal long side, a transition seam is formed between the bottoms of the longitudinal long sides of the two panels.

[0057] Preferably, a second elastic layer capable of deforming under an external force is provided on the inner wall of the mortise.

[0058] The deformation of the second elastic layer can improve the connection stability of the mechanical locking system. When an external force acts on the mortise and tenon groove, the deformation of the second elastic layer can help adjust and adapt to the change of the external force, maintain the stability of the connection point, and prevent loosening or displacement. At the same time, the second elastic layer can play a role in shock absorption and reducing the noise generated by the mechanical locking system. When an external force acts on the mortise and tenon groove, the second elastic layer can absorb and disperse the impact force through deformation, reduce the degree of impact transmitted to other components, absorb and disperse the noise caused by friction and vibration, so as to effectively reduce the transmission of vibration and noise. And the deformation of the second elastic layer can share and buffer the influence of the external force on the mortise and tenon groove, reduce stress concentration, and thus extend the service life of the mechanical locking system. It can reduce the fatigue and damage risk of the mortise and tenon groove and other components, and improve the durability of the system.

[0059] Preferably, the panel sequentially includes a grounding layer, a base layer, and a decorative layer covering the surface of the base layer from bottom to top.

[0060] Preferably, irregularly distributed holes or lines are distributed on the lower surface of the grounding layer.

[0061] In this application, the irregularly distributed holes or lines on the lower surface of the grounding layer in the structure of the panel can increase the friction between the floor and the ground. This increased friction can improve the stability of the floor, reduce the sliding and movement of the floor during use, and provide a safer walking environment. When the floor surface is contaminated by water, oil or other liquids, these holes or lines can help drain water and provide additional friction to prevent people from slipping or falling. And the holes or lines on the lower surface of the grounding layer can also help reduce the ability of the floor to conduct sound, further improving the sound insulation effect of the floor. This is particularly important for sound insulation and noise control between floors, creating a quiet and comfortable living or working environment.

[0062] Preferably, the Ra value of the surface roughness of the lower surface of the grounding layer is greater than 1μm.

[0063] Preferably, a three-dimensional wood grain layer is provided on the upper surface of the decorative layer.

[0064] The existence of the three-dimensional wood grain layer can increase the natural beauty of the floor. The wood grain layer can imitate the texture and texture changes of real wood, bringing a natural and warm appearance to the floor and making the indoor environment more comfortable and attractive. At the same time, the three-dimensional wood grain layer can improve the scratch resistance of the floor. The wood grain layer can provide an additional protective layer for the floor surface, reducing the possibility of scratching and wear. This helps to maintain the beauty and surface quality of the floor and reduce the impact of wear during long-term use.

[0065] Preferably, the base layer is any one of an SPC substrate, a plastic substrate, and a wood substrate.

[0066] In a second aspect, the present invention also provides an application of the panel in a floor, a wall panel or a ceiling panel.

[0067] The present invention has the following beneficial effects: By simultaneously providing a mechanical locking system and a magnetic attraction locking system on the side of the panel, the present application can significantly reduce the installation and disassembly difficulty on the premise of ensuring the connection stability, thereby effectively improving the installation efficiency and reducing the risk of installation errors, and the aesthetics can be greatly improved after the installation is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 It is a schematic diagram of the overall structure of the panel of the present invention.

[0069] Figure 2 It is a schematic diagram of the sectional structure of the panel of the present invention.

[0070] Figure 3 It is a schematic diagram of the connection structure of the mechanical locking system of the panel of the present invention.

[0071] Figure 4 It is a schematic diagram of the split structure of the mechanical locking system of the panel of the present invention.

[0072] Figure 5 It is a schematic diagram of the structure of the mortise and tenon groove including a second elastic layer in the mechanical locking system of the panel of the present invention.

[0073] Figure 6 It is a diagram of the installation process of the mechanical locking system of the panel of the present invention.

[0074] Figure 7 It is another schematic diagram of the connection structure of the mechanical locking system of the panel of the present invention.

[0075] Figure 8 It is a schematic diagram of the connection structure of the magnetic attraction locking system of the panel of the present invention.

[0076] Figure 9 It is a schematic diagram of the split structure of the magnetic attraction locking system of the panel of the present invention.

[0077] Figure 10 It is a schematic diagram of the state of connection of two such panels along the short side in the horizontal direction.

[0078] Figure 11 It is a schematic diagram of the test process at different angles of the magnetic attraction strip.

[0079] Figure 12 It is another schematic diagram of the connection structure of the magnetic attraction locking system of the panel of the present invention.

[0080] Wherein: the longitudinal long side 1, the transverse short side 2, the mechanical locking system 10, the mortise groove 11, the tenon 12, the mortise groove cavity 111, the arc-shaped guiding edge 112, the limiting portion 113, the first error tolerance cavity 114, the second error tolerance cavity 115, the first convex arc 116, the first concave arc 117, the second convex arc 118, the second concave arc 119, the second elastic layer 120, the insertion joint 121, the transition seam 122, the magnetic attraction locking system 20, the magnetic attraction edge 21, the first magnetic attraction strip 211, the second magnetic attraction strip 212a, the metal sheet 212b, the accommodation groove 213, the fitting edge 22, the first elastic layer 221, the deformation cavity 222, the clamping component 23, the clamping groove 231, the clamping joint 232, the first buffer seam 233, the buffer edge 24, the second buffer seam 25, the grounding layer 30, the base layer 40, the decorative layer 50, the three-dimensional wood grain layer 51. Detailed implementation manners

[0081] The present invention will be further described below in conjunction with specific embodiments. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. In addition, the embodiments of the present invention involved in the following descriptions are usually only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0082] As Figures 1 - 2 shown, in this embodiment, a panel is provided, which is in a rectangular shape with a pair of longitudinal long sides 1 and a pair of transverse short sides 2. The panel has a multi-layer composite structure, and the panel sequentially includes a grounding layer 30, a base layer 40, and a decorative layer 50 covering the surface of the base layer from bottom to top.

[0083] Wherein, the thickness of the grounding layer 30 ranges from 0.5 to 5 mm (preferably from 0.5 to 2 mm). Its bottom is roughened by mechanical external force using sandpaper or a sander, so that irregularly distributed holes or lines are left on the bottom of the grounding layer 30, making the surface roughness Ra value of the lower surface of the grounding layer greater than 1 μm. Due to the improvement of roughness, the friction force (static friction force and dynamic friction force) between the grounding layer 30 and the ground is greatly improved, thereby improving the connection stability between the panel and the ground after the panel is erected on the ground and preventing the panel from slipping on the ground.

[0084] In addition, when the floor surface is contaminated by water, oil or other liquids, these holes or lines can help drain water and provide additional friction to prevent people from slipping or falling. And the holes or lines on the lower surface of the grounding layer can also help reduce the sound conduction ability of the floor, further improving the sound insulation effect of the floor. This is particularly important for sound insulation and noise control between floors, creating a quiet and comfortable living or working environment.

[0085] The base layer 40 is a plate-shaped material with a thickness of 2 to 10 mm (preferably in the range of 2 to 5 mm), and at the same time has certain elasticity and toughness. It can be compounded with the grounding layer 30 through the form of melt co-extrusion to obtain an integrated structure. The main material of the base layer 40 can be selected from any one of SPC base materials, plastic base materials, and wood base materials, and is particularly preferably an SPC base material or an IXPE material. These materials have good mechanical strength and good service life, so that they can be effectively applied in a variety of different usage scenarios after installation.

[0086] At the same time, in order to enhance the naturalness and beauty of the floor, a decorative layer 50 is also provided on the upper surface of the base layer 40. The decorative layer 50 may include a three-dimensional wood grain layer 51 that imitates the texture and texture changes of real wood, thereby bringing a natural and warm appearance to the floor and making the indoor environment more comfortable and attractive. The three-dimensional wood grain layer 51 can provide an additional protective layer on the floor surface, reducing the possibility of scratching and wear. This helps to maintain the beauty and surface quality of the floor and reduce the impact of wear during long-term use.

[0087] In order to enable the panels to be spliced with each other to cover the entire floor, a locking system needs to be provided at the edges of the panels. In the prior art, mechanical locking systems are respectively provided at the long sides and short sides of the panels, so that the mechanical properties of the installed panels are more excellent, so as to achieve the purpose of not being easily deformed. However, this dual mechanical locking system has defects such as difficult installation, increased cost, and difficult maintenance and replacement. In order to overcome the deficiencies in the prior art, the present application has made certain designs for the locking system of the panels.

[0088] Such as Figure 3 And Figure 4As shown, the present application is provided with a mechanical locking system 10 on the longitudinal long side 1 of the floor panel, thereby allowing two such panels to be joined to each other along the longitudinal long side 1. At the same time, a magnetic locking system 20 is provided on the transverse short side 2, thereby allowing two such panels to be joined to each other along the transverse short side 2. Therefore, the difference between the present application and the panel structure in the prior art is that only a mechanical locking system 10 is provided on the longitudinal long side 1 of the panel, while a magnetic locking system 20 is provided on the transverse short side, so that through the cooperation between the mechanical locking system 10 and the magnetic locking system 20, two panels can be joined to each other along the edge of the panel. Since the mechanical locking system 10 is only provided on the longitudinal long side 1, the installation process can be simplified. The installer only needs to align and lock the longitudinal long side 1 of the panel, without the need for complex positioning and adjustment on the transverse short side 2, which can improve the installation efficiency and reduce the risk of installation errors. At the same time, the magnetic locking system is relatively simple and has a low cost, so only setting the mechanical locking system 10 on the long side can reduce the material and production costs. Most importantly, only using the mechanical locking system 10 at the longitudinal long side 1 can facilitate the maintenance and replacement of the panel. If the panel needs to be replaced or repaired, only the mechanical locking system 10 on the longitudinal long side 1 needs to be dealt with, without involving the magnetic locking system 20 on the short side, which can simplify the maintenance process and reduce the time and cost.

[0089] Among them, the mechanical locking system 10 in the present application specifically includes a mortise 11 provided on one side of the longitudinal long side 1, and a tenon 12 provided on the other side of the longitudinal long side 1 and capable of being adapted to the mortise.

[0090] From Figure 4 the enlarged view, it can be seen that the difference from the mortise and tenon structure in the prior art is that: the mortise 11 in the present application includes a mortise cavity 111 extending obliquely from the side surface of the longitudinal long side 1 towards the upper surface of the panel, and its structure is an inverted J shape.

[0091] In the prior art, in order to achieve the purpose of easy installation, usually the mortise cavity 111 is set as a horizontal cavity or a downwardly inclined cavity. However, such traditional cavities have the defect of being easily separated after installation. In the present application, by providing the mortise cavity 111 extending towards the upper surface of the panel, it can effectively prevent the connection instability phenomenon between the mortise 11 and the tenon 12 after installation.

[0092] To facilitate the smooth installation of the mechanical locking system 10 in this embodiment, an arc-shaped guiding edge 112 with a smooth transition is provided in the tenon groove cavity 111 from its lower opening to the top of the tenon groove cavity 111, which helps the tenon 12 to smoothly fit into the depth of the tenon groove cavity 111 along the arc-shaped guiding edge 112, and can make the tenon 12 easier to find the correct position when inserted into the tenon groove cavity 111, reducing damage or instability caused by improper insertion. A limiting portion 113 for restricting the displacement of the tenon 12 from the tenon groove cavity 111 is provided at the upper end of the tenon groove cavity 111 near its opening. The design of the limiting portion 113 can restrict the displacement of the tenon 12 inside the tenon groove cavity 111 after the tenon 12 is inserted into the tenon groove cavity 111.

[0093] Furthermore, in some preferred embodiments, the distance between the top of the tenon groove cavity 111 and the bottom of the limiting portion 113 is set to be at least 1 / 10 - 1 / 5 of the thickness, so as to ensure the connection strength after the two panels are connected, and at the same time make the connection between the two panels more convenient.

[0094] Two panels 1260mm * 970mm * 4.85mm are assembled and fixed along the transverse long side 1, and the connection strength after the two panels are connected is tested by adjusting the distance between the top of the tenon groove cavity 111 and the bottom of the limiting portion 113. During the test, one of the panels is fixed to the ground by gluing or screwing, and near the connection of the other panel, it is lifted upward with a force measuring device, and the maximum pulling force used when the two panels are separated is recorded. The test results are shown in Table 1 below.

[0095] Table 1 。

[0096] In addition, in order to make the gap between the two panels smaller after connection and make the installation and disassembly more convenient. In some preferred embodiments, the upper and lower ends of the longitudinal long side 1 of the panel on the side provided with the tenon groove 11 are respectively transitioned with the openings of the tenon groove 11 through the first convex arc 116 and the second convex arc 118; while the upper and lower ends of the longitudinal long side 1 of the panel on the side provided with the tenon 12 are respectively transitioned with the tails of the tenons 12 through the first concave arc 117 and the second concave arc 119. At the same time, the first convex arc 116 and the first concave arc 117 are set to be shape-matched, and the second convex arc 118 and the second concave arc 119 are set to be shape-matched, so that two adjacent panels can rotate along the contact surface of the first convex arc 116 and the first concave arc 117, so that the two panels can slowly rotate and adjust the installation angle along the contact surface of the first convex arc 116 and the first concave arc 117 during the installation process, which is beneficial to the installation of the overall panel.

[0097] As Figure 6 shown Figure 6 During the installation process of the mechanical locking system 10 of the present invention, during the installation process, one end of the mortise groove 11 needs to be fixed to the ground, and at the same time, the tenon 12 is obliquely inserted into the mortise groove 11. Subsequently, it is continuously rotated around the tenon 12 as the center, so as to adjust the relative angle between the tenon 12 and the mortise groove 11. Finally, the tenon 12 is completely inserted into the mortise groove 11 to achieve the mechanical locking of two adjacent panels.

[0098] Since the mechanical locking system 10 needs to precisely fit the tenon 11 and the mortise groove 12 during the cooperation process to ensure the quality and performance stability of its connection. Therefore, further, in some preferred embodiments, in order to further improve the connection simplicity between the mortise groove 11 and the tenon 12, a first error tolerance cavity 114 recessed towards the lower surface of the panel is provided at the opening of the arc-shaped guiding edge 112 close to the mortise groove cavity 111, and at the same time, a second error tolerance cavity 115 recessed towards the upper surface of the panel is provided on one side of the limiting portion 113 close to the arc-shaped guiding edge 112. The existence of the first error tolerance cavity 114 and the second error tolerance cavity 115 in this preferred embodiment can improve the error tolerance of the mechanical locking system.

[0099] When the tenon 12 is inserted into the mortise groove 11, if the insertion position is slightly deviated, the first error tolerance cavity 114 and the second error tolerance cavity 115 can accommodate this deviation and enable the tenon 12 to be correctly positioned. This can reduce the precision requirements during installation and improve the error tolerance and convenience of installation.

[0100] At the same time, the recessed design of the first error tolerance cavity 114 and the second error tolerance cavity 115 helps to reduce the risk of damage caused by incorrect insertion. If the insertion position of the tenon 12 is deviated greatly, the first error tolerance cavity 114 and the second error tolerance cavity 115 can prevent the tenon 12 from directly contacting the lower surface or the upper surface of the panel, reducing possible wear or damage.

[0101] In addition, the design of the first error tolerance cavity 114 and the second error tolerance cavity 115 can also improve the installation efficiency. Since the error tolerance cavity can accommodate the deviation of the insertion position, it is easier for the installer to find the correct insertion position during installation, reducing the installation adjustment and correction time and improving the installation efficiency.

[0102] Finally, the existence of the first error tolerance cavity 114 and the second error tolerance cavity 115 can increase the connection stability of the mechanical locking system. When the tenon 12 is inserted into the correct position, the first error tolerance cavity 114 and the second error tolerance cavity 115 will provide support and a stable connection to prevent the tenon 12 from loosening or displacing during use.

[0103] To further improve the connection stability of the mechanical locking system 10, in some preferred embodiments, a second elastic layer 116 capable of deforming under external force may also be provided on the inner wall of the mortise 11, and its structure is as shown in Figure 5 shown. Thus, when an external force acts on the mortise 11, the deformation of the second elastic layer 116 can help adjust and adapt to the change of the external force, maintain the stability of the connection point, and prevent loosening or displacement. At the same time, when an external force acts on the mortise 11, the second elastic layer 116 can absorb and disperse the impact force through deformation, reduce the degree of impact transmitted to other components, share and buffer the influence of the external force on the mortise, reduce stress concentration, and reduce the fatigue and damage risks of the mortise 11 and other components, thereby extending the service life of the mechanical locking system. And the setting of the second elastic layer 116 can also absorb and disperse the noise caused by friction and vibration, thereby effectively reducing the transmission of vibration and noise.

[0104] As shown in Figure 7 shown, in some preferred embodiments, an insertion joint 121 extending towards the inside of the fault tolerance cavity 115 is further provided on one side of the tenon 12 close to the fault tolerance cavity 115, so that when the tenon is inserted into the mortise, the insertion joint 121 can be embedded in the fault tolerance cavity 115, thereby effectively improving the connection strength between the tenon 12 and the mortise.

[0105] In addition, in this preferred embodiment, when the two panels are joined to each other along the longitudinal long side 1, a transition seam 122 is further formed between the bottoms of the longitudinal long sides 1 of the two panels, which is beneficial to absorbing a part of the external impact force and hindering the transmission of the impact force, thereby reducing the risk of accidental disintegration of the panel.

[0106] The magnetic attraction locking system 20 in the present application is as shown in Figure 8 shown. The magnetic attraction locking system 20 includes magnetic attraction edges 21 arranged at corresponding positions on the side surfaces of the transverse short sides 2, and a fitting edge 22 arranged vertically on at least one side for increasing the static friction in the vertical direction. In order to enable the fitting edge 22 to provide greater friction, the surface of the fitting edge 22 can also be sanded to increase its roughness, so that the surface roughness Ra value is greater than 1 μm. In this embodiment, between two adjacent panels, only the two opposite transverse short sides 2 need to be abutted against each other, and then the magnetic attraction edges 21 on the two panels can be relied on for adsorption connection. At the same time, the fitting edges 22 are arranged vertically on both the upper and lower sides of the magnetic attraction edges 21, and this part of the fitting edges 22 can provide static friction during the process of the panel being lifted by an external force, thereby improving the connection strength between two adjacent panels.

[0107] In order to further improve the connection stability of the magnetic attraction locking system 20, in another preferred embodiment of the present application, a certain inclination angle is formed between the magnetic attraction edge 21 and the horizontal plane. It should be noted that the included angle formed between the magnetic attraction edge 21 and the horizontal plane is not equal to 0 degree and 90 degrees, so that when the two panels are joined along the transverse short side 2, the suction force between the magnetic attraction edges 21 can generate component forces in the vertical direction and the horizontal direction. When the included angle between the magnetic attraction edge 21 and the horizontal plane is 0 degree, that is, the magnetic attraction edge 21 is parallel to the horizontal plane. At this time, although the connection strength between the two panels is the largest, when the floor needs to be disassembled, the difficulty of disassembly will be greatly increased. When the included angle between the magnetic attraction edge 21 and the horizontal plane is 90 degrees, the connection between the two mainly relies on the magnetic attraction of the magnetic attraction edge 21, which results in too low connection strength between the two and is not conducive to the stable connection between the panels.

[0108] After a certain included angle is formed between the magnetic attraction edge 21 and the horizontal plane, the length of the side edge of the transverse short side is greater than the thickness of the panel. This way can provide a larger connection area and increase the connection stability. At the same time, the longer side edge can provide better support and connection force, reducing the risk of the panel moving or separating in the transverse direction. And because the edge length is greater than the panel thickness, it can better absorb and disperse the impact force, reducing the possibility of the floor loosening or cracking. After a certain included angle is formed between the magnetic attraction edge 21 and the horizontal plane, the connection system can be installed inside the edge, making it invisible, thus maintaining the cleanliness and continuity of the floor surface and improving the aesthetics of the floor. Finally, the longer side edge can increase the strength of the overall structure. By extending the edge beyond the panel thickness, additional structural support can be provided, making the floor more solid and stable.

[0109] In this embodiment, the inventor has conducted a certain screening on the setting angle of the magnetic attraction edge 21. The screening results show that when the projection of the magnetic attraction edge 21 in the vertical direction accounts for 20% - 95% of the thickness of the panel, it can ensure that the panels have both stable magnetic attraction and good detachable performance at the same time.

[0110] As Figures 9 - 11 shown, two panels of 1260mm * 970mm * 4.85mm are assembled and fixed along the transverse short side 2. The magnetic attraction edge 21 on the transverse short side 2 of one panel is composed of a first magnetic attraction strip 211 with a length of 6mm, and the magnetic attraction edge 21 on the transverse short side 2 of the other panel is composed of the same second magnetic attraction strip 212a or a metal sheet 212b. During the test, one panel is fixed to the ground by means of glue or screws, and at the connection of the other panel, a force measuring device is used to lift it upward, and the maximum pulling force used when the two panels are separated is recorded. Among them Figure 10The figure is a schematic diagram of the test process at different magnetic strip angles. The test results are shown in Table 2 below.

[0111] Table 2 .

[0112] It can be seen from the data in the above table that when the angles of the first magnetic strip 211, the second magnetic strip 212a or the metal sheet 212b are adjusted, the pulling force required to separate the two interconnected panels is significantly different. When the projection ratio of the magnetic strip is too small, the pulling force used to separate the two panels will be greater, which makes it more difficult to disassemble them later. At the same time, due to the low thickness of the panels, the magnetic edge 21 of the panels may be damaged during the disassembly process, resulting in the problem of difficulty in recycling. At the same time, when the projection ratio of the magnetic strip is too small, that is, the closer the angle between the magnetic edge 21 and the horizontal plane is to 90°, this horizontal insertion method will seriously reduce the installation rate of the panels during the installation process. When the projection ratio of the magnetic strip is too high, the pulling force used to separate the two panels will be greatly reduced, resulting in the problem of reduced stability of the connection.

[0113] like Figure 9 As shown, in order to better fix the first magnetic strip 211, the second magnetic strip 212a or the metal sheet 212b on the transverse short edge 2, in some preferred embodiments, we can first open a receiving groove 213 on the transverse short edge 2 of the panel for accommodating the first magnetic strip 211, the second magnetic strip 212a or the metal sheet 212b, so that the first magnetic strip 211, the second magnetic strip 212a or the metal sheet 212b can be fixed inside the receiving groove 213 by bonding.

[0114] from Figure 9As shown, in order to improve the performance of the fitting edge 22 in enhancing the static friction force, in some preferred embodiments of the present invention, a first elastic layer 221 capable of deforming under an external force is provided on the surface of the fitting edge 22, and a deformation cavity 222 for accommodating the deformation of the first elastic layer 221 is further provided on the transverse short side 2 of the panel. In addition, the design of the first elastic layer 221 and the deformation cavity 222 is also of extremely important significance for the shock absorption and sound insulation performance of the floor. The first elastic layer 221 can deform under an external force, thereby achieving the functions of shock absorption and buffering impact force. It can absorb the impact or vibration received by the floor, reduce the damage to the floor material, and at the same time provide a more comfortable walking experience. At the same time, the deformation cavity 222 can accommodate the deformation of the first elastic layer 221, thereby reducing the stress concentration on the floor surface. This helps to extend the service life of the floor, reduce the cracking or damage caused by external forces, and the design of the first elastic layer 221 and the deformation cavity 222 can also reduce noise and vibration. They can absorb and reduce the noise and vibration transmission generated by the floor, providing a quieter and more comfortable environment.

[0115] As Figure 12 As shown, in order to further enhance the connection strength of the panel at the transverse short side and prevent the panel from disintegrating due to external force impact at the transverse short side. In some preferred embodiments, a set of clamping components 23 is further provided on the side of the transverse short side 2 close to the magnetic attraction locking system 20. Specifically, the clamping component 23 includes a clamping groove 231 provided on one side of the transverse short side 2, and a clamping head 232 provided on the other side of the transverse short side 2 and used to cooperate with the clamping groove 231.

[0116] Among them, the width of the clamping groove 231 is greater than the width of the clamping head 232, so that a first buffer seam 233 is formed between the clamping groove 231 and the clamping head 232 on the side away from the magnetic attraction locking system 20. The setting of the first buffer seam 233 can, to a certain extent, reduce the direct transmission of external impact or vibration to the clamping groove. This buffering effect can protect the clamping groove 231 and the clamping head 232 from damage or destruction caused by external forces. In the case of accidental impact or vibration, the first buffer seam 233 can absorb part of the impact force, reduce the impact on the panel structure, and thus reduce the risk of accidental disintegration of the panel. In addition, since the width of the clamping groove 231 is greater than the width of the clamping head 232, the clamping head 232 can be relatively easily inserted and removed.

[0117] In addition, in this preferred embodiment, a buffer edge 24 recessed inwardly towards the transverse short side 2 is further provided below the fitting edge 22 on the other side of the transverse short side 2 close to the magnetic attraction locking system 20, and a second buffer seam 25 is formed between the buffer edges 24 after the two panels are joined to each other along the transverse short side 2.

[0118] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A panel, characterized in that, the panel is in a rectangular shape with a pair of longitudinal long sides (1) and a pair of transverse short sides (2); a mechanical locking system (10) is provided on the longitudinal long side (1), and the mechanical locking system (10) allows two such panels to be joined to each other along the longitudinal long side (1); a magnetic attraction locking system (20) is provided on the transverse short side (2), and the magnetic attraction locking system (20) allows two such panels to be joined to each other along the transverse short side (2); wherein, the magnetic attraction locking system (20) includes magnetic attraction edges (21) which are arranged at corresponding positions on the side surfaces of the transverse short sides (2), and at least one side of the magnetic attraction edges (21) is provided with a fitting edge (22) for increasing the static friction force in the vertical direction, and the sum of the lengths of the magnetic attraction edges (21) and the fitting edges (22) is greater than the thickness of the panel.

2. A panel according to claim 1, characterized in that, an angle other than 0 degrees and 90 degrees is formed between the magnetic attraction edges (21) and the horizontal plane; so that when two such panels are joined to each other along the transverse short side (2), the suction force between the magnetic attraction edges (21) can generate component forces in the vertical direction and the horizontal direction.

3. A panel according to claim 1 or 2, characterized in that, the projection of the magnetic attraction edges (21) in the vertical direction accounts for 20% - 95% of the thickness of the panel.

4. A panel according to claim 1 or 2, characterized in that, the magnetic attraction edges (21) include a first magnetic attraction strip (211) embedded on one side of the transverse short side (2) of the panel for providing magnetism, and a second magnetic attraction strip (212a) or a metal sheet (212b) which is embedded on the other side of the transverse short side (2) of the panel and is magnetically matched with the first magnetic attraction strip (211).

5. A panel according to claim 4, characterized in that, a receiving groove (213) for receiving the first magnetic attraction strip (211), the second magnetic attraction strip (212a) or the metal sheet (212b) is provided on the transverse short side (2) of the panel.

6. A panel according to claim 1, characterized in that, the fitting edge (22) is a vertical edge, and a vertical edge is respectively provided at the upper and lower ends of the magnetic attraction edge (21).

7. A panel according to claim 1 or 6, characterized in that, the Ra value of the surface roughness of the fitting edge (22) is greater than 1μm.

8. A panel according to claim 7, characterized in that, a first elastic layer (221) which can be deformed under an external force is provided on the surface of the fitting edge (22); a deformation cavity (222) for accommodating the deformation of the first elastic layer (221) is further provided on the transverse short side (2) of the panel.

9. A panel according to claim 1 or 2, characterized in that, a set of clamping components (23) is further provided on one side of the transverse short side (2) close to the magnetic attraction locking system (20); The snap - fit component (23) includes a snap - fit groove (231) provided on one side of the transverse short side (2), and a snap - fit head (232) provided on the other side of the transverse short side (2) and used to cooperate with the snap - fit groove (231).

10. A panel according to claim 9, wherein, the width of the snap - fit groove (231) is greater than the width of the snap - fit head (232), so that a first buffer seam (233) is formed between the snap - fit groove (231) and the snap - fit head (232) on the side away from the magnetic attraction locking system (20).

11. A panel according to claim 9, wherein, a buffer edge (24) recessed into the interior of the transverse short side (2) is further provided below the fitting edge (22) on the other side of the transverse short side (2) close to the magnetic attraction locking system (20), and a second buffer seam (25) is formed between the buffer edges (24) after the two panels are joined to each other along the transverse short side (2).

12. A panel according to claim 1, wherein, the mechanical locking system (10) includes a mortise groove (11) provided on one longitudinal long side (1), and a tenon (12) provided on the other longitudinal long side (1) and capable of being adapted to the mortise groove.

13. A panel according to claim 12, wherein, the mortise groove (11) includes a mortise groove cavity (111) extending obliquely from the side surface of the longitudinal long side (1) towards the upper surface of the panel, an arc - shaped guiding edge (112) with a smooth transition is provided from the lower opening of the mortise groove cavity (111) to the top of the mortise groove cavity (111), and a limiting portion (113) for restricting the displacement of the tenon (12) from the mortise groove cavity (111) is provided at the upper end of the mortise groove cavity (111) near its opening.

14. A panel according to claim 13, wherein, the distance between the top of the mortise groove cavity (111) and the bottom of the limiting portion (113) is at least 1 / 10 - 1 / 5 of the thickness.

15. A panel according to claim 13, wherein, a first error - tolerance cavity (114) recessed towards the lower surface of the panel is provided at the arc - shaped guiding edge (112) near the opening of the mortise groove cavity (111); a second error - tolerance cavity (115) recessed towards the upper surface of the panel is provided on the side of the limiting portion (113) close to the arc - shaped guiding edge (112).

16. A panel according to claim 15, wherein, the upper and lower ends of the longitudinal long side (1) of the panel on the side provided with the mortise groove (11) are respectively transitioned through a first convex arc (116) and a second convex arc (118) at the openings of the mortise groove (11); the upper and lower ends of the longitudinal long side (1) of the panel on the side provided with the tenon (12) are respectively transitioned through a first concave arc (117) and a second concave arc (119) at the tails of the tenon (12); The first convex arc (116) is adapted to the shape of the first concave arc (117), and the second convex arc (118) is adapted to the shape of the second concave arc (119), so that two adjacent panels can rotate along the contact surface between the first convex arc (116) and the first concave arc (117).

17. A panel according to any one of claims 12 to 16, wherein, a second elastic layer (120) capable of deforming under an external force is provided on the inner wall of the mortise groove (11).

18. A panel according to any one of claims 15 to 17, wherein, a socket joint (121) extending towards the inside of the fault tolerance cavity (115) is further provided on one side of the tenon (12) close to the fault tolerance cavity (115).

19. A panel according to any one of claim 18, wherein, when the two panels are joined to each other along the longitudinal long side (1), a transition seam (122) is formed between the bottoms of the longitudinal long sides (1) of the two panels.

20. A panel according to claim 1, wherein, the panel sequentially includes a grounding layer (30), a base layer (40), and a decorative layer (50) covering the surface of the base layer from bottom to top.

21. A panel according to claim 20, wherein, irregularly distributed holes or lines are distributed on the lower surface of the grounding layer.

22. A panel according to claim 20 or 21, wherein, the Ra value of the surface roughness of the lower surface of the grounding layer is greater than 1 μm.

23. A panel according to claim 20, wherein, a three-dimensional wood grain layer (51) is provided on the upper surface of the decorative layer.

24. A panel according to claim 20, wherein, the base layer is any one of an SPC substrate, a plastic substrate, and a wood substrate.

25. Application of the panel according to any one of claims 1 to 24 in a floor, a wall panel, or a ceiling panel.

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