Panel and use thereof

Abstract

The present invention relates to the technical field of decorative panels, in particular to a panel and a use thereof. The panel is in a rectangular shape having a pair of longitudinal long edges and a pair of transverse short edges, a mechanical locking system is arranged on the longitudinal long edges, a magnetic attraction locking system is arranged on the transverse short edges, the magnetic attraction locking system comprises magnetic attraction edges arranged on the side surfaces of the transverse short edges and at positions corresponding to each other, at least one side of each magnetic attraction edge is provided with an attaching edge used for improving static friction force in the vertical direction; and the edge length of the side face of each transverse short edge is larger than the thickness of the panel. According to the present application, by arranging the mechanical locking system and the magnetic attraction locking system on the side edges of the panel at the same time, the mounting and dismounting difficulty is greatly reduced while ensuring the connection stability, thereby effectively improving the mounting efficiency and reducing the risk of mounting errors.

Description

A panel and its application Technical Field

[0001] The present invention relates to the technical field of decorative panels, in particular to a panel and application thereof. Background Art

[0002] Floor panels are a decorative material used for flooring, often made of wood or man-made materials. They are designed to be joined together to cover an entire floor, creating a beautiful and durable surface. Because they offer the natural beauty and texture of solid wood flooring without sacrificing stability and durability, they are widely used in flooring installations in homes, businesses, and public spaces.

[0003] The connection between floor panels is crucial for ensuring a stable and durable floor covering. Proper connection ensures a tight connection between panels, preventing looseness or gaps. Proper connection also simplifies installation and improves efficiency.

[0004] Current floor panel connection methods include floating joints, adhesive joints, tongue and groove joints, mortise and tenon joints, locking connection systems, and nailing.

[0005] One of the most common methods is suspended splicing. For example, Patent CN 116420001 A discloses a design and manufacturing method for floor panels with raised tongues and grooves along their edges, allowing them to fit together and connect. This connection method is simple and easy to use, but if the connection is not secure or the installation is incorrect, it may cause gaps or looseness between the floor panels, making the floor unstable.

[0006] Adhesive splicing, such as that disclosed in patent CN115298403A, involves a tile panel and a surface covering composed of multiple adjacent tile panels. Installation requires specialized personnel and is difficult to disassemble and replace. The selection and proper application of glue are crucial, as otherwise the connection may become unstable, deform, or fall apart. Furthermore, adhesive splicing poses environmental challenges, as some glues may contain hazardous substances.

[0007] Tongue-and-groove and mortise-and-tenon joints require more craftsmanship and expertise. Improper installation can lead to gaps between floor panels, deformation, or loosening. Furthermore, the mortise-and-groove and mortise-and-tenon joint method requires higher material requirements, potentially increasing production costs.

[0008] Locking connection systems, such as those disclosed in CN116490658A, which discloses building panels with primary and secondary locking systems, provide a more secure and stable joint. However, installation requires ensuring that the locking connections are properly aligned and that appropriate force is applied. Otherwise, the connection may become unstable or damaged. Furthermore, the design and production of locking connection systems require a higher level of technology and cost.

[0009] Nailing is a traditional method of fastening floor panels to the ground using nails. However, this method can cause floor panels to break, nails to loosen and rust, and is not suitable for certain materials.

[0010] Therefore, there is an urgent need to research, develop, and improve floor panel connections. We need to find a connection method that ensures structural stability and longevity while also addressing aesthetics and environmental concerns. This next-generation connection method should be easy to install and removable, adaptable to various climate changes and usage environments, and address the strength challenges associated with thinner floor panels.

[0011] However, increasingly stringent ecological requirements and the drive to save materials, weight, and energy are driving the demand for thinner floor panels. However, these thinner floor panels inevitably present challenges. This is particularly true with regard to joint structures. Thinner floor panels mean smaller and thinner joints, potentially leading to reduced joint strength. In these situations, new connection methods and structural designs are needed to ensure stable and secure joints. Summary of the Invention

[0012] The present invention aims to overcome the challenge of reduced connection strength of panels in the prior art in the face of increasingly stringent 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-mentioned shortcomings.

[0013] In a first aspect, the present invention first provides a panel,

[0014] The panel is rectangular in shape with a pair of longitudinal long sides and a pair of transverse short sides;

[0015] A mechanical locking system is provided on the longitudinal long side, and the mechanical locking system allows the two panels to be joined together along the longitudinal long side; a magnetic locking system is provided on the transverse short side, and the magnetic locking system allows the two panels to be joined together along the transverse short side;

[0016] In which, the magnetic locking system includes magnetic edges arranged on the side surfaces of the lateral short edges and positioned corresponding to each other, at least one side of the magnetic edges is provided with a fitting edge for enhancing the static friction in the vertical direction, and the edge length of the lateral short edge is greater than the thickness of the panel.

[0017] The existing panels are provided with mechanical locking systems on both the long and short sides, which makes the installed panels have better mechanical properties and are less prone to deformation. However, this dual mechanical locking system has the following drawbacks:

[0018] (1) Difficulty in installation. Generally speaking, during the installation process, the long sides of the panels need to be locked first by the locking system located at the long sides of the panels. However, locking the long sides will make it difficult to correctly align and position the locking systems at the short sides of the panels. Therefore, if a mechanical locking system is set on each edge, it may increase the complexity of installation. In order to ensure that the mechanical locking system of each edge is correctly aligned and positioned, it may take more time and effort. This may make the installation process complicated and prone to errors.

[0019] (2) Increased costs. Using a mechanical locking system on each edge may increase manufacturing costs. Each edge requires a component with a mechanical locking system, which may increase material and production costs. In addition, a more complex design may also lead to higher processing and assembly costs.

[0020] (3) Design limitations. Providing a mechanical locking system on each edge may limit the design and appearance of the panel. The components of these mechanical locking systems require space, so sufficient space may need to be left in the design. This may limit the design flexibility of the panel and may restrict some special designs.

[0021] (4) Difficulty in 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.

[0022] The present invention differs from conventional panel structures in that a mechanical locking system is provided only on the longitudinal long sides of the panels, while a magnetic locking system is provided on the transverse short sides. The cooperation between the mechanical and magnetic locking systems allows two panels to be joined together along their edges. This design approach has the following beneficial effects:

[0023] (1) The present invention simplifies the installation process by providing the mechanical locking system only on the long sides. The installer only needs to align and lock the long sides of the panel without having to perform complicated positioning and adjustments on the short sides. This improves installation efficiency and reduces the risk of installation errors.

[0024] (2) Compared to setting up a mechanical locking system on every edge, setting up a mechanical locking system only on the long edge can reduce 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 technology.

[0025] (3) Limiting the mechanical locking system to the long edges provides greater design flexibility. The magnetic locking system on the short edges is relatively small and concealed, which can better maintain the overall appearance and aesthetics of the panel.

[0026] (4) Using a mechanical locking system only on the long sides facilitates maintenance and replacement of panels. If a panel needs to be replaced or repaired, only the mechanical locking system on the long side needs to be handled, without involving the magnetic locking system on the short side. This simplifies the maintenance process, reducing time and costs.

[0027] In addition, regarding the magnetic locking system, the magnetic locking system in this application includes magnetic edges and fitting edges that are arranged on the side of the short transverse edges and are positioned corresponding to each other, and the length of the side edges of the short transverse edges is greater than the thickness of the panel. This approach can provide a larger connection area and increase the stability of the connection. The longer side edges 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 edges can provide better seismic performance when the floor is impacted or vibrated. 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. The design of the edge length being greater than the panel thickness can hide the connecting components, so the connection system can be installed inside the edge, making it invisible, thereby maintaining the neatness and continuity of the floor surface and improving the aesthetics of the floor. Finally, the longer side edges can increase the strength of the overall structure. By extending the edge beyond the thickness of the panel, additional structural support can be provided, making the floor stronger and more stable.

[0028] Preferably, the magnetic edge forms an angle with the horizontal plane that is not equal to 0 degree or 90 degrees.

[0029] Preferably, the projection of the magnetic edge in the vertical direction accounts for 20-95% of the thickness of the panel.

[0030] The design of a magnetic locking system requires adherence to certain principles, the most important of which are the stability of the magnetic attachment and the removability of the panel. In actual testing, the inventors found that the ratio of the vertical projection length of the magnetic edge to the panel thickness has a significant correlation with the mechanical properties of the final product.

[0031] In this application, the vertical projection of the magnetic edge accounts for 20% to 95% of the thickness of the panel, which can bring the following benefits:

[0032] Strong adsorption force. A large projection area can increase the adsorption force of the magnetic edge. The larger contact area provides stronger adsorption force, allowing the panel to adhere more firmly to the floor or other surface, reducing the risk of movement or loosening.

[0033] Improved stability: By increasing the projected area of ​​the magnetic edge, the stability of the panel can be improved. The larger contact area provides better support and connection force, reducing the possibility of the panel shaking or tilting in the vertical direction.

[0034] Easy removal and replacement: The appropriate projected area of ​​the magnetic edge maintains a high level of adhesion while also facilitating panel removal and replacement. When panel removal or replacement is necessary, the large projected area provides sufficient adhesion without excessive difficulty, making maintenance and replacement more convenient.

[0035] Aesthetics and concealment: Since the projected area of ​​the magnetic edge can be designed to occupy 20% to 95% of the panel thickness, the magnetic edge can be designed to be small and concealed. This can maintain the cleanliness and continuity of the panel surface and improve the aesthetics of the floor.

[0036] However, it's important to note that the vertical projection of the magnetic edge shouldn't be too small or too large. A too small projection may result in insufficient suction and insufficient stability. An excessively large projection may make removal and replacement difficult and may affect the floor's appearance.

[0037] Preferably, the magnetic edge includes a first magnetic strip embedded on a short transverse side of the panel for providing magnetism, and a second magnetic strip or metal sheet embedded on the short transverse side of the panel for magnetically matching the first magnetic strip.

[0038] In this application, the adsorption between the magnetic strip and the metal sheet, or the adsorption between the two magnetic strips, can effectively reduce the design difficulty of the magnetic locking system, and at the same time can effectively reduce the production cost of the magnetic locking system.

[0039] Preferably, a receiving groove for receiving the first magnetic strip, the second magnetic strip or the metal sheet is provided on the transverse short side of the panel.

[0040] In this application, a receiving groove for accommodating the first magnetic strip, the second magnetic strip or the metal sheet is first opened on the transverse short side of the panel, so that the magnetic edge can be embedded in the receiving groove, thereby ensuring the flatness of the side edge of the transverse short side of the panel.

[0041] Preferably, the fitting edge is a vertical edge, and a vertical edge is provided at the upper and lower ends of the magnetic edge respectively.

[0042] Vertical edges increase the stability of magnetic edges. They provide additional support and securing force, helping to secure the panels in their vertical position. This helps reduce panel wobble or loosening, providing a more stable floor surface. Furthermore, the vertical edges prevent the magnetic edges from shifting or tilting vertically. They provide boundaries and constraints, ensuring the magnetic edges always remain in the correct position. This increases the stability and safety of the floor. Furthermore, vertical edges enhance the strength and durability of the magnetic edges. They prevent them from excessive vertical bending or excessive stress, extending their lifespan and reducing the risk of damage. Finally, vertical edges enhance the aesthetics of the floor. They conceal the magnetic edge joints, creating a cleaner, more continuous surface. This contributes to a more aesthetically pleasing floor appearance.

[0043] Preferably, the surface roughness Ra value of the bonding edge is greater than 1 μm.

[0044] Preferably, the surface of the fitting edge is provided with a first elastic layer which can be deformed under the action of external force;

[0045] A deformation cavity for accommodating the deformation of the first elastic layer is also provided on the transverse short side of the panel.

[0046] Shock absorption and noise reduction performance are extremely important for flooring. In this application, by providing a first elastic layer on the surface of the bonding edge that can be deformed under the action of external force, and providing a deformation cavity on the transverse short edge of the panel, the following benefits can be achieved: (1) The first elastic layer can be deformed under the action of external force, thereby reducing shock and buffering the impact force. It can absorb the impact or vibration of the floor, reduce damage to the floor material, and provide a more comfortable walking experience. (2) The deformation cavity can accommodate the deformation of the first elastic layer, thereby reducing stress concentration on the floor surface. This helps to extend the service life of the floor and reduce cracks 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 of the floor on the feet, they can reduce 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 transmission of noise and vibration generated by the floor, providing a quieter and more comfortable environment.

[0047] To achieve better shock absorption and noise reduction effects, the first elastic layer can be made of a high-damping rubber material, such as silicone rubber, EPDM rubber, natural rubber, styrene-butadiene rubber, nitrile rubber, etc. These rubber materials all have certain elasticity and damping properties, which can effectively reduce shock and impact, and reduce noise and vibration.

[0048] Preferably, a set of snap-fit ​​components is further provided on the side of the transverse short side close to the magnetic locking system;

[0049] The clamping assembly comprises a clamping slot arranged on one side of the transverse short side, and a clamping joint arranged on the other side of the transverse short side and used to match the clamping slot.

[0050] The present invention also provides a group of snap-fit ​​components on the side of the transverse short side close to the magnetic locking system, so that in addition to the magnetic locking system, a group of mechanical locking systems are added to the transverse short side of the panel, thereby effectively improving the connection strength of the panel at the transverse short side and preventing the panel from disintegrating due to external force impact on the transverse short side.

[0051] Preferably, the width of the clamping groove is greater than the width of the clamping joint, so that a first buffer gap is formed between the clamping groove and the clamping joint at a side away from the magnetic locking system.

[0052] The presence of the first buffer joint provides a buffering effect. When a certain gap exists between the connector and the slot, it can mitigate the direct transmission of external shock or vibration to the slot. This buffering effect protects the slot and connector, reducing damage or disruption caused by external forces. In the event of an unexpected impact or vibration, the first buffer joint can absorb some of the impact, reducing the impact on the panel structure and thereby reducing the risk of accidental panel disassembly. Furthermore, because the slot is wider than the connector, the connector can be inserted and removed relatively easily.

[0053] Preferably, a buffer edge recessed into the interior of the transverse short edge is provided below the fitting edge at the other side of the transverse short edge close to the magnetic locking system, and a second buffer seam is formed between the buffer edges after the two panels are joined to each other along the transverse short edge.

[0054] Preferably, the mechanical locking system includes a mortise and tenon provided on one longitudinal long side, and a tenon provided on the other longitudinal long side and capable of matching with the mortise and tenon.

[0055] Preferably, the mortise and tenon comprises a mortise and tenon cavity extending obliquely from the side of the longitudinal long side toward the upper surface of the panel, the mortise and tenon cavity is provided with a smoothly transitioned arc-shaped guide edge from its lower end opening to the top of the mortise and tenon cavity, and the mortise and tenon cavity is provided with a limiting portion for limiting the displacement of the tenon from the mortise and tenon cavity near its upper end near the opening.

[0056] In this application, the design of the mortise and tenon allows for a secure connection. The tenon fits snugly into the mortise cavity, forming a tight connection that securely locks the panel in the longitudinal direction, making it less susceptible to loosening or displacement. Furthermore, the tenon easily inserts into the mortise cavity, with its displacement limited by a stopper, enabling quick and reliable installation and removal. The smoothly transitioning curved guide edge at the top of the mortise cavity facilitates a smooth connection. This makes it easier for the tenon to find the correct position when inserted into the mortise cavity and reduces the risk of damage or instability caused by improper insertion.

[0057] Preferably, the distance between the top of the tongue and groove cavity and the bottom of the limiting portion is at least 1 / 10-1 / 5 of the thickness of the panel.

[0058] In actual testing, the applicant discovered that the spacing between the top of the mortise cavity and the bottom of the stopper is significantly correlated with the tightness of the connection between two adjacent panels. When the spacing between the top of the mortise cavity and the bottom of the stopper is less than 1 / 10 of the panel thickness, the two panels are more closely aligned when connected, resulting in lower connection strength. However, if the spacing between the top of the mortise cavity and the bottom of the stopper is greater than 1 / 5 of the panel thickness, connection between the two panels becomes more difficult. Therefore, when the spacing between the top of the mortise cavity and the bottom of the stopper is at least 1 / 10-1 / 5 of the panel thickness, both good connection strength and ease of assembly can be achieved.

[0059] Preferably, the arc-shaped guide edge is provided with a first fault-tolerant cavity recessed toward the lower surface of the panel near the opening of the mortise and tenon cavity;

[0060] A second fault-tolerant cavity that is recessed toward the upper surface of the panel is provided on one side of the limiting portion close to the arc-shaped guide edge.

[0061] The mechanical locking system requires precise alignment of the tenon and the mortise during the fitting process to ensure the quality and stable performance of the connection. The presence of the first and second tolerance cavities in this application improves the tolerance of the mechanical locking system. If the tenon is inserted into the mortise, even if there is slight misalignment, the tolerance cavity can accommodate this misalignment and ensure the tenon is correctly positioned. This reduces the precision requirements during installation, improving both tolerance and convenience. The recessed design of the tolerance cavity also helps reduce the risk of damage caused by incorrect insertion. If the tenon's insertion position deviates significantly, the tolerance cavity prevents direct contact between the tenon and the lower or upper surface of the panel, reducing potential wear and damage. The tolerance cavity design also improves installation efficiency. Because the tolerance cavity accommodates misalignment, it makes it easier for installers to find the correct insertion position during installation, reducing adjustment and correction time and improving installation efficiency. Finally, the presence of the tolerance cavity increases the stability of the mechanical locking system's connection. When the tenon is correctly inserted, the tolerance cavity provides support and a secure connection, preventing the tenon from loosening or shifting during use.

[0062] Preferably, the upper and lower ends of the longitudinal long side of the panel located on the side where the mortise is provided are respectively transitioned to the opening of the mortise through a first convex arc and a second convex arc;

[0063] The upper and lower ends of the longitudinal long side of the panel located on the side where the tenon is provided are respectively transitioned to the tail of the tenon through a first concave arc and a second concave arc;

[0064] The first convex arc is adapted to the first concave arc shape, and the second convex arc is adapted to the second concave arc shape, so that two adjacent panels can rotate along the contact surface of the first convex arc and the first concave arc.

[0065] Preferably, a splice joint extending toward the interior of the fault-tolerant cavity is further provided on the side of the tenon close to the fault-tolerant cavity.

[0066] The provision of the inlay joint can effectively improve the connection strength between the tenon and the mortise when the tenon is inserted into the mortise.

[0067] Preferably, when the two panels are joined to each other along their longitudinal long sides, a transition seam is formed between the bottoms of the longitudinal long sides of the two panels.

[0068] Preferably, a second elastic layer capable of deforming under the action of external force is provided on the inner wall of the mortise and tenon.

[0069] The deformation of the second elastic layer improves the connection stability of the mechanical locking system. When external forces act on the mortise and tenon, the deformation of the second elastic layer helps adjust and adapt to these changes, maintaining the stability of the connection point and preventing loosening or displacement. The second elastic layer also acts as a shock absorber and reduces the noise generated by the mechanical locking system. When external forces act on the mortise and tenon, the second elastic layer deforms to absorb and disperse the impact, reducing the extent to which the impact is transmitted to other components. It also absorbs and disperses noise caused by friction and vibration, effectively reducing the transmission of vibration and noise. Furthermore, the deformation of the second elastic layer shares and cushions the impact of external forces on the mortise and tenon, reducing stress concentration and thus extending the service life of the mechanical locking system. This reduces the risk of fatigue and damage to the mortise and tenon and other components, improving the durability of the system.

[0070] Preferably, the panel comprises, from bottom to top, a ground layer, a base layer and a finishing layer covering the surface of the base layer.

[0071] Preferably, irregularly distributed holes or lines are distributed on the lower surface of the ground layer.

[0072] In this application, irregularly distributed holes or lines on the lower surface of the grounding layer within the paneling structure increase friction between the floor and the ground. This increased friction improves the floor's stability, reduces slipping and movement during use, and provides a safer walking environment. When the floor surface is contaminated by water, oil, or other liquids, these holes or lines aid drainage and provide additional friction to prevent slips and falls. Furthermore, the holes or lines on the lower surface of the grounding layer help reduce the floor's ability to conduct sound, further enhancing the floor's sound insulation. This is particularly important for sound insulation and noise control between floors, creating a quiet and comfortable living or working environment.

[0073] Preferably, the surface roughness Ra value of the lower surface of the grounding layer is greater than 1 μm.

[0074] Preferably, a three-dimensional wood grain layer is provided on the upper surface of the finishing layer.

[0075] The presence of a three-dimensional wood grain layer enhances the floor's natural beauty. The wood grain layer mimics the grain and texture variations of real wood, giving the floor a natural and warm appearance, making indoor environments more comfortable and attractive. The three-dimensional wood grain layer also improves the floor's scratch resistance. The wood grain layer provides an additional layer of protection to the floor surface, reducing the likelihood of scratches and wear. This helps maintain the floor's beauty and surface quality, reducing the effects of wear and tear over time.

[0076] Preferably, the base layer is any one of an SPC substrate, a plastic substrate, and a wood substrate.

[0077] In a second aspect, the present invention further provides use of the panel in a floor, a wall panel or a ceiling panel.

[0078] The present invention has the following beneficial effects:

[0079] By setting up a mechanical locking system and a magnetic locking system on the side of the panel at the same time, this application can greatly reduce the difficulty of installation and disassembly while ensuring the stability of the connection, 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

[0080] FIG1 is a schematic diagram of the overall structure of the panel according to the present invention.

[0081] FIG2 is a schematic diagram of the cross-sectional structure of the panel according to the present invention.

[0082] FIG3 is a schematic diagram of the connection structure of the mechanical locking system of the panel according to the present invention.

[0083] FIG4 is a schematic diagram of the split structure of the mechanical locking system of the panel according to the present invention.

[0084] FIG. 5 is a schematic diagram showing the structure of the tongue and groove including the second elastic layer in the mechanical locking system of the panel according to the present invention.

[0085] FIG. 6 is a diagram illustrating the installation process of the mechanical locking system of the panel according to the present invention.

[0086] FIG. 7 is a schematic diagram of another connection structure of the mechanical locking system of the panel according to the present invention.

[0087] FIG8 is a schematic diagram of the connection structure of the magnetic locking system of the panel according to the present invention.

[0088] FIG9 is a schematic diagram of the split structure of the magnetic locking system of the panel according to the present invention.

[0089] FIG. 10 is a schematic diagram showing the state where two panels are connected along their transverse short sides.

[0090] Figure 11 is a schematic diagram of the test process at different magnetic strip angles.

[0091] FIG. 12 is a schematic diagram of another connection structure of the magnetic locking system of the panel according to the present invention.

[0092] Among them: longitudinal long side 1, transverse short side 2, mechanical locking system 10, mortise 11, tenon 12, mortise cavity 111, arc-shaped guide edge 112, limiting portion 113, first fault-tolerant cavity 114, second fault-tolerant cavity 115, first convex arc 116, first concave arc 117, second convex arc 118, second concave arc 119, second elastic layer 120, embedding joint 121, transition seam 122, magnetic locking system 20, magnetic edge 21, first magnetic strip 211, second magnetic strip 212a, metal sheet 212b, accommodating groove 213, fitting edge 22, first elastic layer 221, deformation cavity 222, snap-fit ​​assembly 23, snap-fit ​​groove 231, snap-fit ​​joint 232, first buffer seam 233, buffer edge 24, second buffer seam 25, grounding layer 30, base layer 40, finishing layer 50, three-dimensional wood grain layer 51. DETAILED DESCRIPTION

[0093] The present invention will be further described below with reference to specific embodiments. Those skilled in the art will be able to implement the present invention based on these descriptions. Furthermore, the embodiments of the present invention described below generally represent only a portion of the present invention, rather than all of the embodiments. Therefore, all other embodiments derived by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0094] As shown in Figures 1 and 2, this embodiment provides a panel having 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, comprising, from bottom to top, a ground layer 30, a base layer 40, and a finishing layer 50 covering the base layer.

[0095] The grounding layer 30 has a thickness ranging from 0.5 to 5 mm (preferably 0.5 to 2 mm). Its bottom is roughened mechanically using sandpaper or a belt sander, leaving irregularly distributed holes or lines on the bottom of the grounding layer 30. This results in a surface roughness Ra greater than 1 μm on the lower surface of the grounding layer 30. This increased roughness significantly increases the friction (static and kinetic friction) between the grounding layer 30 and the ground, thereby enhancing the stability of the connection between the panel and the ground after installation and preventing the panel from slipping.

[0096] Furthermore, when the floor surface is contaminated by water, oil, or other liquids, these holes or lines help drain water and provide additional friction to prevent people from slipping or falling. Furthermore, the holes or lines on the underside of the grounding layer can help reduce the floor's ability to conduct sound, further enhancing the floor's sound insulation. This is particularly important for sound insulation and noise control between floors, creating a quiet and comfortable living or working environment.

[0097] The base layer 40 is a plate-like material with a thickness of 2-10 mm (preferably 2-5 mm) and exhibits a certain degree of elasticity and toughness. It can be combined with the ground layer 30 through melt coextrusion to form an integrated structure. The base layer 40 can be primarily made of any of SPC, plastic, or wood substrates, with SPC or IXPE being particularly preferred. These materials offer excellent mechanical strength and long service life, making them suitable for a variety of applications once installed.

[0098] To enhance the naturalness and aesthetics of the floor, the present application also provides a finishing layer 50 on the upper surface of the base layer 40. This finishing layer 50 may include a three-dimensional wood grain layer 51 that mimics the texture and grain variations of real wood, giving the floor a natural and warm appearance, making the indoor environment more comfortable and attractive. The three-dimensional wood grain layer 51 provides an additional layer of protection for the floor surface, reducing the likelihood of scratches and wear. This helps maintain the floor's aesthetics and surface quality, and reduces the effects of wear and tear over time.

[0099] In order to allow the panels to be joined together to cover the entire floor, locking systems are required at the edges of the panels. Conventional panels have mechanical locking systems on both the long and short edges, which improves the mechanical properties of the installed panels and prevents deformation. However, this dual mechanical locking system presents drawbacks such as installation difficulties, increased costs, and difficulties in maintenance and replacement. To overcome these shortcomings of the existing technology, the present application has developed a design for a locking system for the panels.

[0100] As shown in Figures 3 and 4 , the present invention provides a mechanical locking system 10 on the longitudinal long edge 1 of the floor panel, allowing the two panels to be joined together along the longitudinal long edge 1. Simultaneously, a magnetic locking system 20 is provided on the transverse short edge 2, allowing the two panels to be joined together along the transverse short edge 2. Therefore, the present invention differs from conventional panel structures in that the mechanical locking system 10 is only provided on the longitudinal long edge 1, while the magnetic locking system 20 is provided on the transverse short edge. The mechanical locking system 10 and the magnetic locking system 20 cooperate to allow the two panels to be joined together along the panel's edge. Since the mechanical locking system 10 is only provided on the longitudinal long edge 1, the installation process is simplified. Installers only need to align and lock the panels along the longitudinal long edge 1, eliminating the need for complex positioning and adjustment on the transverse short edge 2. This improves installation efficiency and reduces the risk of installation errors. Furthermore, the magnetic locking system is relatively simple and inexpensive, so providing the mechanical locking system 10 only on the long edge reduces material and production costs. Most importantly, using the mechanical locking system 10 only on the longitudinal long edge 1 facilitates maintenance and replacement of the panels. If the panel needs to be replaced or repaired, only the mechanical locking system 10 on the longitudinal long edge 1 needs to be handled, without involving the magnetic locking system 20 on the short edge. This simplifies the maintenance process and reduces time and cost.

[0101] The mechanical locking system 10 in the present application specifically includes a mortise and tenon 11 provided on one longitudinal long side 1 , and a tenon 12 provided on the other longitudinal long side 1 and capable of matching with the mortise and tenon.

[0102] As can be seen from the enlarged view of Figure 4, the difference from the mortise and tenon structure in the prior art is that the mortise and tenon structure in this application includes a mortise and tenon cavity 111 extending from the side of the longitudinal long side 1 inclined toward the upper surface of the panel, and its structure is an inverted J-shape.

[0103] In the prior art, in order to facilitate installation, the mortise and tenon cavity 111 is usually provided as a horizontal cavity or a downwardly inclined cavity. However, such conventional cavities have the disadvantage of being easily separated after installation. In the present application, by providing the mortise and tenon cavity 111 extending toward the upper surface of the panel, it is possible to effectively prevent the mortise and tenon 12 from becoming unstable after installation.

[0104] In order to facilitate the smooth installation of the mechanical locking system 10 in this embodiment, this embodiment is provided with a smoothly transitioned arc-shaped guide edge 112 along the lower end opening of the mortise cavity 111 to the top of the mortise cavity 111, thereby facilitating the smooth fitting of the tenon 12 along the arc-shaped guide edge 112 into the deep part of the mortise cavity 111, and making it easier for the tenon 12 to find the correct position when inserted into the mortise cavity 111, thereby reducing damage or instability caused by improper insertion. The upper end of the mortise cavity 111 near its opening is provided with a limiting portion 113 for limiting the displacement of the tenon 12 from the mortise cavity 111. The design of the limiting portion 113 can limit the displacement of the tenon 12 inside the mortise cavity 111 after the tenon 12 is inserted into the mortise cavity 111.

[0105] Furthermore, in some preferred embodiments, the distance between the top of the mortise and tenon cavity 111 and the bottom of the limiting portion 113 is set to at least 1 / 10-1 / 5 of the thickness, thereby ensuring the connection strength of the two panels after connection, and also making the connection between the two panels more convenient.

[0106] Two panels measuring 1260mm x 970mm x 4.85mm were assembled and fixed along their long horizontal edge 1. The gap between the top of the tongue-and-groove cavity 111 and the bottom of the stop 113 was adjusted to test the joint strength. During the test, one panel was fixed to the ground with glue or screws, while the other panel was pulled upward near the joint using a force measuring device. The maximum tensile force required to separate the two panels was recorded. The test results are shown in Table 1 below.

[0107] Table 1

[0108]

[0109] In addition, in order to reduce the gap between the two panels after connection and to facilitate installation and removal, in some preferred embodiments, the upper and lower ends of the longitudinal long side 1 of the panel located on the side where the mortise 11 is provided are transitioned to the opening of the mortise 11 through a first convex arc 116 and a second convex arc 118 respectively; and the upper and lower ends of the longitudinal long side 1 of the panel located on the side where the tenon 12 is provided are transitioned to the tail of the tenon 12 through a first concave arc 117 and a second concave arc 119 respectively. At the same time, the first convex arc 116 and the first concave arc 117 are set to be adapted in shape, and the second convex arc 118 and the second concave arc 119 are set to be adapted in shape, so that the 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 along the contact surface of the first convex arc 116 and the first concave arc 117 to adjust the installation angle during the installation process, which is beneficial to the installation of the entire panel.

[0110] As shown in FIG6 , FIG6 shows the installation process of the mechanical locking system 10 of the present invention. During the installation process, one end of the mortise 11 needs to be fixed to the ground, and the tenon 12 is inserted obliquely into the mortise 11. Then, the tenon 12 is continuously rotated with the tenon 12 as the center of the circle to adjust the relative angle between the tenon 12 and the mortise 11, and finally the tenon 12 is completely inserted into the mortise 11 to achieve mechanical locking of two adjacent panels.

[0111] Because the mechanical locking system 10 requires precise matching of the tenon 11 and the mortise 12 during the mating process to ensure the quality and stable performance of their connection, further, in some preferred embodiments, to further enhance the ease of connection between the mortise 11 and the tenon 12, a first fault-tolerant cavity 114 recessed toward the lower surface of the panel is provided near the opening of the mortise cavity 111 on the curved guide edge 112, while a second fault-tolerant cavity 115 recessed toward the upper surface of the panel is provided on the side of the limiting portion 113 near the curved guide edge 112. The presence of the first fault-tolerant cavity 114 and the second fault-tolerant cavity 115 in this preferred embodiment can enhance the fault tolerance of the mechanical locking system.

[0112] When the tenon 12 is inserted into the mortise 11, if the insertion position deviates slightly, the first fault-tolerant cavity 114 and the second fault-tolerant cavity 115 can accommodate such deviation and enable the tenon 12 to be correctly positioned. This can reduce the precision requirements during installation and improve the fault tolerance and convenience of installation.

[0113] The recessed design of the first and second tolerance cavities 114, 115 also helps reduce the risk of damage due to incorrect insertion. If the tenon 12 is inserted into a position with a large deviation, the first and second tolerance cavities 114, 115 prevent the tenon 12 from directly contacting the lower or upper surface of the panel, reducing possible wear or damage.

[0114] Furthermore, the design of the first fault-tolerant cavity 114 and the second fault-tolerant cavity 115 can improve installation efficiency. Since the fault-tolerant cavity can accommodate deviations in the insertion position, it is easier for the installer to find the correct insertion position during installation, reducing installation adjustment and correction time and improving installation efficiency.

[0115] Finally, the presence of the first fault-tolerant cavity 114 and the second fault-tolerant cavity 115 can increase the connection stability of the mechanical locking system. When the tenon 12 is inserted into the correct position, the first fault-tolerant cavity 114 and the second fault-tolerant cavity 115 will provide support and a stable connection to prevent the tenon 12 from loosening or displacement during use.

[0116] To further enhance 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 be provided on the inner wall of the mortise 11. Its structure is shown in Figure 5. Consequently, when external force acts on the mortise 11, the deformation of the second elastic layer 116 helps adjust and adapt to the changes in external force, maintaining the stability of the connection point and preventing loosening or displacement. Furthermore, when external force acts on the mortise 11, the second elastic layer 116 absorbs and disperses the impact force through deformation, reducing the extent of the impact transmitted to other components, sharing and buffering the impact of external force on the mortise, reducing stress concentration, and lowering the risk of fatigue and damage to the mortise 11 and other components, thereby extending the service life of the mechanical locking system. Furthermore, the provision of the second elastic layer 116 can absorb and disperse noise caused by friction and vibration, effectively reducing the transmission of vibration and noise.

[0117] As shown in Figure 7, in some preferred embodiments, the tenon 12 is further provided with an embedding joint 121 extending into the fault-tolerant cavity 115 on one side close to the fault-tolerant cavity 115, so that when the tenon is inserted into the mortise, the embedding joint 121 can be embedded in the fault-tolerant cavity 115, thereby effectively improving the connection strength between the tenon 12 and the mortise.

[0118] In addition, in this preferred embodiment, after the two panels are joined to each other along the longitudinal long sides 1, a transition seam 122 is formed between the bottoms of the longitudinal long sides 1 of the two panels, which is conducive to absorbing part of the external impact force and hindering the transmission of the impact force, thereby reducing the risk of accidental disintegration of the panels.

[0119] The magnetic locking system 20 in the present application is shown in Figure 8. The magnetic locking system 20 includes a magnetic edge 21 arranged on the side of the horizontal short edge 2 and positioned corresponding to each other, and a vertically arranged fitting edge 22 arranged 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 its surface roughness Ra value is greater than 1μm. In this embodiment, the two adjacent panels only need to place the two opposite horizontal short edges 2 against each other, so that they can be adsorbed and connected by the magnetic edges 21 on the two panels. At the same time, vertically arranged fitting edges 22 are provided on the upper and lower sides of the magnetic edge 21. This part of the fitting edge 22 can provide static friction when the panel is lifted upward by an external force, thereby improving the strength of the connection between the two adjacent panels.

[0120] In order to further improve the connection stability of the magnetic locking system 20, in another preferred embodiment of the present application, a certain inclination angle is formed between the magnetic edge 21 and the horizontal plane. However, it should be noted that the angle formed between the magnetic edge 21 and the horizontal plane is not equal to 0 degrees or 90 degrees, so that when the two panels are connected to each other along the transverse short side 2, the suction force between the magnetic edges 21 can generate components in the vertical direction and the horizontal direction. When the angle between the magnetic edge 21 and the horizontal plane is 0 degrees, that is, the magnetic edge 21 is parallel to the horizontal plane, although the connection strength between the two panels is the greatest at this time, when the floor needs to be disassembled, the difficulty of disassembly will be greatly increased. When the angle between the magnetic edge 21 and the horizontal plane is 90 degrees, the connection between the two panels mainly relies on the magnetic attraction of the magnetic edge 21, which results in too low connection strength between the two panels, which is not conducive to the stable connection between the panels.

[0121] When a certain angle is formed between the magnetic edge 21 and the horizontal plane, the length of the short lateral side edge is greater than the thickness of the panel. This method can provide a larger connection area and increase the stability of the connection. At the same time, the longer side edge can provide better support and connection force, reducing the risk of movement or separation of the panel in the lateral direction. And because the edge length is greater than the thickness of the panel, it can better absorb and disperse impact force, reducing the possibility of the floor loosening or breaking. After a certain angle is formed between the magnetic edge 21 and the horizontal plane, the connection system can be installed inside the edge, making it invisible, thereby 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 thickness of the panel, additional structural support can be provided, making the floor stronger and more stable.

[0122] In this embodiment, the inventors have screened the setting angle of the magnetic edge 21. The screening results show that when the projection of the magnetic edge 21 in the vertical direction accounts for 20% to 95% of the thickness of the panel, it can ensure that the panels have stable magnetic adsorption and good detachability at the same time.

[0123] As shown in Figures 9-11, two panels measuring 1260mm*970mm*4.85mm were assembled and fixed along their short transverse edges 2. The magnetic edge 21 on one panel's short transverse edge 2 consisted of a first magnetic strip 211 with a length of 6mm, while the magnetic edge 21 on the other panel's short transverse edge 2 consisted of an identical second magnetic strip 212a or metal sheet 212b. During testing, one panel was secured to the ground with glue or screws, while the other panel was lifted upward near the connection using a force measuring device. The maximum pulling force required to separate the two panels was recorded. Figure 10 shows the test process at different magnetic strip angles. The test results are shown in Table 2 below.

[0124] Table 2

[0125]

[0126] As can be seen from the data in the table above, when adjusting the angles of the first magnetic strip 211, the second magnetic strip 212a, or the metal sheet 212b, the pulling force required to separate the two interconnected panels varies significantly. When the projection of the magnetic strip is too small, the pulling force used to separate the two panels is greater, which makes subsequent disassembly more difficult. At the same time, due to the low thickness of the panels, the magnetic edge 21 of the panel may be damaged during disassembly, making recycling difficult. At the same time, when the projection 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°, the horizontal insertion method will seriously reduce the installation speed of the panel during installation. When the projection of the magnetic strip is too high, the pulling force used to separate the two panels will be greatly reduced, resulting in a decrease in the stability of the connection.

[0127] As shown in Figure 9, in order to better fix the first magnetic strip 211, the second magnetic strip 212a or the metal sheet 212b on the horizontal short side 2, in some preferred embodiments, we can first open a receiving groove 213 on the horizontal short side 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.

[0128] As shown in Figure 9, to enhance the static friction-enhancing properties of the mating edge 22, in some preferred embodiments of the present invention, the mating edge 22 is provided with a first elastic layer 221 that deforms under external forces. A deformation cavity 222 is also provided on the transverse short edge 2 of the panel to accommodate the deformation of the first elastic layer 221. Furthermore, the design of the first elastic layer 221 and the deformation cavity 222 is crucial for the floor's shock absorption and quietness. The first elastic layer 221 deforms under external forces, thereby absorbing shock and cushioning impact. It absorbs shock or vibration, minimizing damage to the floor material and providing a more comfortable walking experience. Simultaneously, the deformation cavity 222 accommodates the deformation of the first elastic layer 221, reducing stress concentration on the floor surface. This helps extend the floor's service life and reduces cracking or damage caused by external forces. Furthermore, the design of the first elastic layer 221 and the deformation cavity 222 also reduces noise and vibration. They absorb and reduce the transmission of noise and vibration generated by the floor, providing a quieter and more comfortable environment.

[0129] As shown in Figure 12, to further enhance the connection strength of the panel at the transverse short edge and prevent the panel from disintegrating due to external impact at the transverse short edge, in some preferred embodiments, a set of snap-fit ​​components 23 is further provided on the side of the transverse short edge 2 adjacent to the magnetic locking system 20. Specifically, the snap-fit ​​components 23 include a snap-fit ​​groove 231 provided on one side of the transverse short edge 2, and a snap-fit ​​connector 232 provided on the other side of the transverse short edge 2 for mating with the snap-fit ​​groove 231.

[0130] The width of the snap-in slot 231 is greater than the width of the snap-in joint 232, forming a first buffer gap 233 between the snap-in slot 231 and the snap-in joint 232 on the side away from the magnetic locking system 20. The provision of the first buffer gap 233 can, to a certain extent, reduce the direct transmission of external shocks or vibrations to the snap-in slot. This buffering effect can protect the snap-in slot 231 and the snap-in joint 232 from damage or destruction caused by external forces. In the event of accidental impact or vibration, the first buffer gap 233 can absorb some of the impact force, reducing the impact on the panel structure, thereby reducing the risk of accidental disintegration of the panel. In addition, because the width of the snap-in slot 231 is greater than the width of the snap-in joint 232, the snap-in joint 232 can be relatively easy to insert and remove.

[0131] In addition, in this preferred embodiment, a buffer edge 24 recessed into the interior of the lateral short edge 2 is provided below the fitting edge 22 on the other side of the lateral short edge 2 close to the magnetic locking system 20. After the two panels are joined to each other along the lateral short edge 2, a second buffer seam 25 is formed between the buffer edges 24.

[0132] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A panel, characterized in that: The panel is in a rectangular shape having 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 the two panels to be joined together along the longitudinal long side (1); a magnetic locking system (20) is provided on the transverse short side (2), and the magnetic locking system (20) allows the two panels to be joined together along the transverse short side (2); The magnetic locking system (20) comprises magnetic edges (21) arranged on the side of the transverse short edge (2) and at positions corresponding to each other, at least one side of the magnetic edge (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 edge (21) and the fitting edge (22) is greater than the thickness of the panel.

2. A panel according to claim 1, characterized in that The magnetic edges (21) form an angle with the horizontal plane that is not equal to 0 degrees or 90 degrees, so that when the two panels are joined to each other along the transverse short sides (2), the suction force between the magnetic 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 edge (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 edge (21) comprises a first magnetic strip (211) embedded in a short transverse edge (2) on one side of the panel for providing magnetism, and a second magnetic strip (212a) or a metal sheet (212b) embedded in a short transverse edge (2) on the other side of the panel and magnetically matching the first magnetic strip (211).

5. A panel according to claim 4, characterized in that A receiving groove (213) for receiving the first magnetic strip (211), the second magnetic 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 provided at the upper and lower ends of the magnetic attraction edge (21), respectively.

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

8. A panel according to claim 7, characterized in that The surface of the fitting edge (22) is provided with a first elastic layer (221) which can be deformed under the action of an external force; A deformation cavity (222) for accommodating deformation of the first elastic layer (221) is also 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 snap-fit ​​components (23) is also provided on one side of the transverse short side (2) close to the magnetic locking system (20); The clamping assembly (23) comprises a clamping groove (231) arranged on one side of the transverse short side (2), and a clamping joint (232) arranged on the other side of the transverse short side (2) and used to cooperate with the clamping groove (231).

10. A panel according to claim 9, characterized in that The width of the clamping groove (231) is greater than the width of the clamping joint (232), so that a first buffer gap (233) is formed between the clamping groove (231) and the clamping joint (232) on a side away from the magnetic locking system (20).

11. A panel according to claim 9, characterized in that A buffer edge (24) recessed into the interior of the transverse short edge (2) is also provided below the fitting edge (22) at the other side of the transverse short edge (2) close to the magnetic locking system (20); after the two panels are joined together along the transverse short edge (2), a second buffer seam (25) is formed between the buffer edges (24).

12. A panel according to claim 1, characterized in that The mechanical locking system (10) comprises a mortise and tenon groove (11) arranged on one longitudinal long side (1), and a tenon (12) arranged on the other longitudinal long side (1) and capable of matching with the mortise and tenon groove.

13. A panel according to claim 12, characterized in that The mortise and tenon (11) comprises a mortise and tenon cavity (111) extending obliquely from the side of the longitudinal long side (1) toward the upper surface of the panel, the mortise and tenon cavity (111) is provided with a smoothly transitioning arc-shaped guide edge (112) from its lower end opening to the top of the mortise and tenon cavity (111), and the mortise and tenon cavity (111) is provided with a limiting portion (113) at the upper end near its opening for limiting the displacement of the tenon (12) from the mortise and tenon cavity (111).

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

15. A panel according to claim 13, characterized in that The arc-shaped guide edge (112) is provided with a first fault-tolerant cavity (114) recessed toward the lower surface of the panel near the opening of the tenon cavity (111); A second fault-tolerant cavity (115) recessed toward the upper surface of the panel is provided on one side of the limiting portion (113) close to the arc-shaped guide edge (112).

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

17. A panel according to any one of claims 12 to 16, characterized in that: A second elastic layer (120) capable of deforming under the action of an external force is provided on the inner wall of the tongue and groove (11).

18. A panel according to any one of claims 15 to 17, characterized in that A side of the tenon (12) close to the fault-tolerant cavity (115) is also provided with an inlay joint (121) extending into the interior of the fault-tolerant cavity (115).

19. A panel according to any one of claims 18, characterized in that When the two panels are joined to each other along the longitudinal long sides (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, characterized in that The panel comprises, from bottom to top, a grounding layer (30), a base layer (40), and a finishing layer (50) covering the surface of the base layer.

21. A panel according to claim 20, characterized in that The lower surface of the grounding layer is provided with irregularly distributed holes or lines.

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

23. A panel according to claim 20, characterized in that A three-dimensional wood grain layer (51) is provided on the upper surface of the finishing layer.

24. A panel according to claim 20, characterized in that The base layer is any one of an SPC base material, a plastic base material, and a wood base material.

25. Use of the panel as claimed in any one of claims 1 to 24 in floor panels, wall panels or ceiling panels.

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