Connecting base plate for composite floor and composite floor

Abstract

The utility model discloses a connecting base plate for a composite floor and the composite floor. The connecting base plate is used for splicing adjacent composite floors. Comprising a base plate, at least one side edge surrounding the periphery of the base plate is convexly provided with a lock tongue, and at least one side edge is concavely provided with a lock groove; when the base plates are spliced, the lock tongues and the lock grooves on the adjacent base plates are connected in a matched mode. The two opposite side faces, making contact with the lock groove in a matched mode, of the lock tongue are lock tongue connecting faces, and the two opposite side faces, making contact with the lock tongue in a matched mode, of the lock groove are lock groove connecting faces. A large number of groove holes are distributed in the spring bolt connecting face and / or the lock groove connecting face, and the drawing force between the spring bolt and the lock groove is improved by more than 1% under the same matching degree between the spring bolt and the lock groove through the groove holes. Due to the arrangement of the groove holes, the contact roughness between the spring bolt connecting face and the lock groove connecting face is improved, and therefore the drawing force between the spring bolt and the lock groove is enhanced, and the firmness of connection between the base plates is improved.

Description

Technical Field

[0001] This utility model relates to the field of flooring technology, and more specifically, to a connecting substrate for composite flooring and the composite flooring. Background Technology

[0002] In the field of building decoration materials, coverings for decorative materials include ceramic tiles, leather, and wood veneer. Ceramic tiles, with their durability and aesthetic appeal, are widely used in both residential and commercial renovations. However, with the accelerating pace of modern life and increased environmental awareness, the complexity of traditional ceramic tile installation and its environmental friendliness have become increasingly prominent issues. The installation process of traditional ceramic tiles is cumbersome and complex, usually requiring professional technicians, which not only increases construction costs but also extends the renovation period. Furthermore, the installation of traditional ceramic tiles relies heavily on materials such as cement mortar, which easily generates significant dust and noise during construction, negatively impacting the construction site and surrounding environment, thus contradicting modern green and environmentally friendly construction concepts. Secondly, the relatively large weight of traditional ceramic tiles undoubtedly increases the load-bearing burden on floor slabs in high-rise buildings or locations requiring lightweight decoration, increasing the difficulty and cost of structural design. Utility Model Content

[0003] This utility model provides a connecting substrate and composite flooring for composite flooring, which can achieve at least one of the following: 1) realize convenient installation of composite flooring and improve work efficiency; 2) increase the connection strength between substrates.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A connecting base plate for composite flooring, used for splicing adjacent composite flooring; comprising a base plate, with a latch protruding at at least one side around the base plate and a locking groove recessed at at least one side; when the base plates are spliced, the latches and locking grooves on adjacent base plates engage; the two opposite sides of the latch that engage with the locking groove are latch connecting surfaces, and the two opposite sides of the locking groove that engage with the latch are locking groove connecting surfaces; a large number of grooves are distributed on the latch connecting surfaces and / or locking groove connecting surfaces, the grooves increasing the pull-out force between the latch and the locking groove by more than 1% under the same degree of engagement.

[0006] In this solution, the connecting base plate is connected to the cover plate in the composite flooring. When laying and splicing the composite flooring, the interlocking tongues and grooves between adjacent base plates engage to complete the installation. Compared to traditional composite flooring installation methods, this solution greatly simplifies the process. During installation, only the ground needs to be leveled before splicing the composite flooring; there is no need to lay cement on the ground, reducing the building's load-bearing capacity and improving the ease of installation. The interlocking tongues and grooves allow for simple splicing; the tongues are simply inserted into the grooves, making the installation process simple and convenient, requiring no professional workers.

[0007] Furthermore, the composite flooring in this solution is primarily installed on the ground, with the substrates connected by latches and grooves to form the finished decorative flooring. This flooring bears a certain weight, but there may be some errors in the ground leveling process before installation. If the connection between the latches and grooves is not secure, the floorboards will often loosen, reducing the comfort of use. To prevent loosening of the latches and grooves, this solution incorporates numerous grooves on both the latch and groove connecting surfaces. When the latches and grooves are engaged, the contact between their surfaces causes misalignment of these grooves. This means that some grooves on the latch surface will contain structures not present on the groove surface, and vice versa. This increases the roughness between the latch and groove connecting surfaces, increasing friction and thus enhancing the pull-out force, improving the connection strength between the substrates and reducing the likelihood of loosening during use.

[0008] As a further improvement, the grooved holes are irregularly distributed on the latch connecting surface and the lock groove connecting surface. This irregular distribution of the grooved holes increases the probability of misalignment during the contact between the latch connecting surface and the lock groove connecting surface. For example, it allows more grooved holes on the latch connecting surface to accommodate more structures on the lock groove connecting surface that do not have grooved holes, further improving the robustness of the connection between the latch connecting surface and the lock groove connecting surface.

[0009] As a further improvement, the groove hole includes an opening and a recessed portion connected to the opening and recessed in the substrate. The opening is located on the latch connection surface or the lock groove connection surface. The recessed portion is arc-shaped, and the maximum arc length of the recessed portion is less than the maximum circumference of the closed hole when the groove hole in which it is located is a closed hole.

[0010] The preferred embodiment is that the recessed portion is arc-shaped. However, in other embodiments, the shape of the recessed portion can also be other forms, such as a polygonal structure. In this embodiment, the recessed portion is still described as arc-shaped. The maximum arc length of the recessed portion is less than the maximum circumference of the closed hole when the recessed hole is closed. For example, the arc length of some recessed portions is equal to half the maximum circumference of the closed hole when the recessed hole is closed, the arc length of some recessed portions is greater than half the maximum circumference of the closed hole when the recessed hole is closed, and the arc length of some recessed portions is less than half the maximum circumference of the closed hole when the recessed hole is closed. Moreover, recessed portions of different sizes are irregularly distributed on the latch connecting surface and the lock groove connecting surface. In this case, the recesses of different sizes on the latch connecting surface and the lock groove connecting surface are misaligned, making the roughness of different parts on the latch connecting surface and the lock groove connecting surface more uniform and similar. This results in better uniformity of connection between different parts of the latch and the lock groove, especially for cases where the base plate is long, such as when the base plate length is set to more than 1000cm. This avoids the possibility of poor connection at some connection points between the latch and the lock groove.

[0011] As a further improvement, the average maximum diameter of the groove holes is 60-100 micrometers. The openings of all the groove holes on each of the latch connecting surfaces or lock groove connecting surfaces occupy 30%-90% of the surface area of ​​each latch connecting surface or lock groove connecting surface. The size of the groove holes and the distribution area of ​​their openings on the latch connecting surfaces or lock groove connecting surfaces maximize the possibility of misalignment fit between the groove holes.

[0012] As a further improvement, the substrate has two opposing target surfaces, where target surface one is used to connect with the cover element in the composite flooring, and target surface two serves as the laying surface; at least one end of the laying surface is chamfered or rounded at the connection point with the side of the substrate where the latch or locking groove is located. Taking the chamfering or rounded connection point of the laying surface with the side of the substrate where the latch is located as an example, when adjacent substrates are spliced, for example, after the first substrate is laid, the locking groove of the first substrate awaits splicing, and the second substrate is held close to the first substrate for splicing, with the latch of the second substrate awaiting splicing. During this process, the second substrate is held at a certain angle. As the latch enters the locking groove during splicing, the second substrate is gradually flattened. The chamfering or rounded transition at the connection point between the laying surface and the side of the substrate where the latch is located prevents jamming of the second substrate's laying surface when the latch and locking groove are flattened. On the other hand, in some cases, after the second substrate is laid flat, it will push the second substrate so that the locking tongue of the second substrate is fully engaged with the locking groove of the first substrate. The chamfer or transition arc makes the second substrate easier to push.

[0013] Furthermore, the chamfered corners or rounded transitions better prevent damage from debris on the ground during substrate installation. Without chamfers or rounded transitions, the substrate is at a right angle. If debris is present on the ground during installation, pushing the substrate can easily damage or scratch this right angle, creating a stress concentration point. During use, sudden external forces, such as falling heavy objects, or heating conditions, can cause cracks at these stress concentration points, affecting the substrate's lifespan.

[0014] As a further improvement, the end of the latch away from the base plate is arc-shaped. Since the roughness between the latch connecting surface and the lock groove connecting surface of the base plate is relatively large in this design, this arc shape provides a certain guide when the latch is inserted into the lock groove, making the latch and lock groove easier to assemble.

[0015] As a further improvement, the latch connecting surface and the lock groove connecting surface are flush with the target surface of the substrate.

[0016] As a further improvement, the end of the latch near the center of the base plate is its root, and the other end is its free portion; at least one of the latch connecting surfaces is inclined, so that the thickness of the latch gradually increases from the free portion to the root.

[0017] And / or,

[0018] At least one of the lock groove connecting surfaces is inclined, so that the size of the lock groove gradually increases from the opening to the bottom surface.

[0019] As a further improvement, the angle of inclination of the latch connecting surface or the lock groove connecting surface relative to the target surface of the substrate is α, and the range is 0°<α≤10°.

[0020] As a further improvement, the bolt and the locking groove are connected by an interference fit, which makes the locking groove clamp the bolt more tightly and further improves the pull-out force.

[0021] As a further improvement, the thickness of the latch and the locking groove accounts for 30% to 60% of the thickness of the substrate.

[0022] As a further improvement, the width of the protruding latch and the depth of the recessed lock groove are 3~8mm.

[0023] As a further improvement, the laying surface is provided with an insulating element, which is a 1-3mm thick membrane. Preferably, the membrane contains an antifungal agent, and the antifungal agent-containing membrane is one of IXPE (electronically cross-linked polyethylene foam or radiation-cross-linked polyethylene foam), EVA (ethylene-vinyl acetate copolymer), or cork membrane. The inclusion of this membrane can improve the product's sound insulation or noise reduction effect. Simultaneously, this type of membrane is elastic and, when used in combination with the substrate, provides cushioning for the substrate, improving the comfort of walking on the composite flooring.

[0024] This utility model also provides a composite floor, including a cover and a connecting substrate for composite floor as described in any one of the claims, wherein the cover and the substrate are bonded together.

[0025] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0026] (1) A connecting base plate for composite flooring according to this utility model. In this solution, the connecting base plate is connected to the cover piece in the composite flooring. When the composite flooring is laid and spliced, the laying of the composite flooring can be completed by the interlocking of the locking tongue and locking groove between adjacent base plates. Compared with the traditional method of laying composite flooring, this solution greatly simplifies the laying method of composite flooring and improves the convenience of flooring installation. The base plates are connected by locking tongue and locking groove. A large number of groove holes are provided on the locking tongue connecting surface and the locking groove connecting surface to improve the roughness between the contact surfaces of the locking tongue connecting surface and the locking groove connecting surface, increase the friction between the two, thereby enhancing the pull-out force between the locking tongue and the locking groove, improving the firmness of the connection between the base plates, and making it less likely to loosen during use.

[0027] (2) The connecting substrate for composite flooring of this utility model has irregularly distributed groove holes. When the locking tongue connecting surface and the locking groove connecting surface are in contact with each other, the probability of misalignment of the groove holes on them can be increased. For example, more groove holes on the locking tongue connecting surface can accommodate more structures that do not have groove holes on the locking groove connecting surface, further improving the firmness of the connection between the locking tongue connecting surface and the locking groove connecting surface.

[0028] (3) In a connecting substrate for composite flooring of this utility model, at least one end of the laying surface is chamfered or rounded at the connection point with the side of the substrate where the latch or groove is provided. On the one hand, when adjacent substrates are spliced, for example, after the first substrate is laid, the chamfering or rounded transition prevents the second substrate from getting stuck when the latch and groove are spliced ​​and the second substrate is laid flat. On the other hand, in some cases, after the second substrate is laid flat, it will push the second substrate to make the second substrate fully fit with the first substrate. The chamfering or rounded transition makes the second substrate easier to push. Attached Figure Description

[0029] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of this utility model. Furthermore, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.

[0030] Figure 1 This is a schematic diagram of the connecting substrate structure;

[0031] Figure 2 This is a schematic diagram of a cross-section of the substrate along its thickness direction;

[0032] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0033] Figure 4 A schematic diagram showing the inclined setting of the latch connection surface;

[0034] Figure 5 This is a schematic diagram illustrating the splicing state of adjacent substrates in a practical scenario.

[0035] Figure 6 A schematic diagram showing the chamfering at the connection between the surface to the base plate and the side of the latching tongue.

[0036] Figure 7 A schematic diagram showing the chamfering at the connection between the laying surface and the side of the substrate, near the lock groove.

[0037] Figure 8 A schematic diagram of the structure when the locking tongue is set with an arc at the end away from the base plate.

[0038] Label Explanation:

[0039] 1. Base plate; 11. Lock tongue; 111. Lock tongue connecting surface; 12. Lock groove; 121. Lock groove connecting surface; 13. Groove hole; 100. Chamfer; 101. Side side one; 102. Side side two. Detailed Implementation

[0040] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0041] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation. In addition to indicating orientation or positional relationships, some of the aforementioned terms may also have other meanings. For example, the term "upper" may, in certain circumstances, indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0043] This embodiment provides a connecting substrate for composite flooring. The substrate 1 has two opposing target surfaces, one of which is used to connect with a cover material. The cover material can be leather, wood veneer, or ceramic tile, etc. When ceramic tile is used, it is an ultra-thin ceramic tile, typically with a thickness of less than 6 mm, for example, a thickness of 4 mm, 5 mm, or 6 mm. This embodiment uses an ultra-thin ceramic tile as an example for illustration.

[0044] Combination Figure 1 and Figure 2 As shown, the connecting substrate for composite flooring provided in this embodiment includes a substrate 1. The substrate 1 has two opposing target surfaces as large surfaces, wherein target surface one is used for connecting with ceramic tiles, and target surface two is used as the laying surface. The sides adjacent to the target surfaces include two opposing side surfaces one 101 and two opposing side surfaces two 102. A locking tongue 11 is provided on one of the adjacent side surfaces one 101 and one of the adjacent side surfaces two 102, and a locking groove 12 is provided on the other adjacent side surfaces one 101 and one of the adjacent side surfaces two 102. When two substrates 1 are spliced ​​together, the locking tongue 11 and the locking groove 12 on the adjacent substrates 1 engage and connect; the two opposing sides of the locking tongue 11 that engage with the locking groove 12 are the locking tongue connecting surfaces 111, and the two opposing sides of the locking groove 12 that engage with the locking tongue 11 are the locking groove connecting surfaces 121.

[0045] It should be noted that in some cases, only one of the two opposite sides 101 is provided with a locking tongue 11 or a locking groove 12, and only one of the two opposite sides 102 is provided with a locking tongue 11 or a locking groove 12.

[0046] Typically, the substrate 1 is a complete square. The latch 11 and the lock groove 12 are formed on the substrate 1 by removing material, for example by milling, so that the latch 11 and the lock groove 12 are integrally formed on the substrate 1, giving the substrate 1 good integrity.

[0047] Combination Figure 2 and Figure 3 As shown, in this preferred embodiment, a large number of recessed holes 13 are distributed on the latch connecting surface 111 and the lock groove connecting surface 121. These recessed holes 13 increase the pull-out force between the latch 11 and the lock groove 12 by more than 1% under the same degree of fit. Specifically, the increase in pull-out force can be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, and 4%. 6%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%.

[0048] The same degree of fit between the latch 11 and the lock groove 12 means that the depth and width of the latch 11 and the lock groove 12 are the same, the contact area at the mating point is the same when they are connected, and the interference fit between the latch 11 and the lock groove 12 is the same. Specifically, each pair of spliced ​​substrates forms a group, and the corresponding dimensions of the latch 11 and lock groove 12 of the two groups of substrates are consistent.

[0049] The pull-out force is the force measured when the latch and groove of adjacent base plates move at a relatively uniform speed during pull-out along the width of the protruding latch or the depth of the recessed groove. For details on the pull-out direction (see [link to relevant documentation]),... Figure 1 The direction indicated by B in the diagram.

[0050] In this design, substrate 1 is used to connect with tiles to form a composite floor. When laying tiles on the ground, the interlocking tongues 11 and grooves 12 between adjacent substrates cooperate to complete the tile installation. Compared to traditional floor tile laying methods, this design greatly simplifies the tile laying process. During installation, tiles can be joined after the ground is leveled, eliminating the need for cement and reducing the building's load-bearing capacity. The interlocking tongues 11 and grooves 12 are used for connection; during joining, the tongues 11 are simply inserted into the grooves 12, making the installation process simple and convenient, requiring no professional workers. Furthermore, substrate 1 in this design can be made from existing plastics, further reducing the added building weight during decoration compared to traditional thick floor tiles.

[0051] In this design, the composite flooring is primarily installed on the ground, bearing a certain weight. However, there may be some errors in the ground leveling process before installation. If the connection between the latch 11 and the locking groove 12 is not secure, the floorboards may become loose, reducing the comfort of use. In this design, the baseboards 1 are connected by the latch 11 and the locking groove 12. To prevent the latch 11 and locking groove 12 from separating under load, recessed holes 13 are provided on the latch connecting surface 111 and the locking groove connecting surface 121. When the latch 11 and locking groove 12 are engaged, the contact between the latch connecting surface 111 and the locking groove connecting surface 121 causes misalignment of the recessed holes 13. This means that some recessed holes 13 on the latch connecting surface 111 will accommodate structures that do not have recessed holes on the locking groove connecting surface 121, and the same applies to the recessed holes 13 on the locking groove connecting surface 121. This improves the roughness between the contact surface 111 of the latch and the contact surface 121 of the lock groove, increases the friction between them, enhances the pull-out force between the latch and the lock groove, and improves the firmness of the connection between the base plates, making it less prone to loosening during use.

[0052] It should be noted that in other embodiments, groove holes may be provided only on the latch connecting surface 111 or only on the lock groove connecting surface 121. This can also increase the roughness between the latch connecting surface 111 and the lock groove connecting surface 121, increase the friction between them, and thus enhance the pull-out force between the latch and the lock groove. This can be applied to some occasions where the pull-out force requirement between the substrates is low.

[0053] In the experiment, plastic vinyl sheets of the same size were selected for each group, with one group of plastic vinyl sheets having a density of 0.85 g / cm³. 3 The latch connecting surface 111 and the lock groove connecting surface 121 are provided with recessed holes 13. Another set of plastic vinyl sheets has a density of 1.6 g / cm³. 3The latch connecting surface 111 and the lock groove connecting surface 121 do not have recessed holes 13. Both have dimensions of 100mm × 100mm × 5mm (length × width × thickness). The thickness of both the latch 11 and the lock groove 12 is 1.8mm. The protruding width of the latch 11 is 3.5mm, the recess depth of the lock groove 12 is 5mm, and the length of the mating connection between the latch 11 and the lock groove 12 is 100mm. Each sample consists of 5 pieces, and the average pull-out force is calculated. Details are shown in the table below:

[0054]

[0055] The pull-out force test was conducted using a JF-100A testing equipment manufactured by Dongguan Jianfeng Instrument Co., Ltd. The locking tongue connecting surface 111 and the locking groove connecting surface 121 were flush with the surface of the substrate 1. The test speed was 100 mm / min. Pull-out force values ​​between other substrates, such as those using wooden (oak) substrates or other types of plastic substrates, can also be obtained using the same method.

[0056] As a further improvement, the recessed holes 13 are irregularly distributed on the latch connecting surface 111 and the lock groove connecting surface 121. The irregular distribution means that the recessed holes 13 are randomly located at different positions on the latch connecting surface 111 and the lock groove connecting surface 121, and the size, shape and depth of each recessed hole 13 embedded in the substrate are the same or different.

[0057] The recessed hole 13 can be formed by any existing method, such as machining, grinding or chemical etching.

[0058] Specifically, the recessed hole 13 includes an opening and a recessed portion connected to the opening and recessed in the substrate. The opening is located on the latch connecting surface 111 or the lock groove connecting surface 121. The recessed portion is arc-shaped, and the maximum arc length of the recessed portion is less than the maximum circumference of the closed hole when the recessed hole is closed. Figure 3 As shown, the groove holes 13 are embedded to different depths into the substrate 1.

[0059] In this design, the average maximum diameter of the recessed hole 13 is 60-100 micrometers, more preferably 70-90 micrometers. The opening of all the recessed holes 13 on each latch connecting surface 111 or lock groove connecting surface 121 occupies 30%-90% of the surface area of ​​each latch connecting surface 111 or lock groove connecting surface 121. Corresponding to different sizes of recessed holes 13, the size of the opening of the recessed hole 13 relative to the surface area of ​​each latch connecting surface 111 or lock groove connecting surface 121 is different.

[0060] Combination Figure 5 , Figure 6 and Figure 7As shown, substrate 1 has two opposing target surfaces, where target surface one is used for connection with the tile, and target surface two serves as the laying surface. When adjacent substrates 1 are spliced, for example, after the first substrate is laid, the locking groove 12 of the first substrate awaits splicing, and the second substrate is held close to the first substrate for splicing, with the locking tongue 11 of the second substrate awaiting splicing. During this process, the second substrate is held with a certain tilt. As the locking tongue 11 enters the locking groove 12 during splicing, the second substrate is gradually flattened. The connection between the laying surface and the side of the substrate 1 where the locking tongue 11 is located is chamfered to prevent the locking tongue 11 from jamming when splicing the second substrate. At the same time, the second substrate is easier to push.

[0061] In other cases, a transition arc can also be provided at the connection between the laying surface and the side where the latch 11 is provided on the substrate 1.

[0062] In another scenario, the rounded or chamfered design can also be located at the connection point between the laying surface and the side of the locking groove 12 on the substrate 1. In this case, the locking tongue 11 awaits splicing after the first substrate is laid.

[0063] Furthermore, the 100° chamfer or transition arc can better prevent the substrate from being damaged by debris on the ground during installation. Compared to the absence of a chamfer or transition arc, where the substrate 1 is at a right angle, if there are debris on the ground during installation, the right angle is easily damaged or scratched by the debris when the substrate 1 is pushed, forming a stress concentration point. During the use of the substrate 1, if a sudden external force occurs, such as a heavy object falling, or under heating conditions, cracks are likely to appear at the stress concentration point, affecting the service life of the substrate 1.

[0064] In a preferred embodiment, the latch connecting surface 111 and the lock groove connecting surface 121 are flush with the surface of the substrate 1, which facilitates the processing and formation of the latch 11 and the lock groove 12.

[0065] In another embodiment, the latch 11 has its root at one end near the center of the substrate 1 and its free end at the other end; at least one latch connecting surface 111 is inclined, so that the thickness of the latch 11 gradually increases from the free end to the root. In other cases, at least one lock groove connecting surface 121 may be inclined, so that the size of the lock groove 12 gradually increases from the opening to the bottom surface. Moreover, the inclination angle of the latch connecting surface 111 or the lock groove connecting surface 121 relative to the surface of the substrate 1 is α, and the angle range of α is 0° < α ≤ 10°. This arrangement makes it easier for the latch 11 to be inserted into the latch 12.

[0066] Whether the latch connecting surface 111 and the lock groove connecting surface 121 are flush or inclined, the latch 11 and the lock groove 12 are connected by an interference fit at the connection point.

[0067] Preferably, the center lines of the thickness of the latch 11 and the locking groove 12 coincide with the center line of the thickness of the substrate 1. The thickness of the latch 11 and the locking groove 12 accounts for 30% to 60% of the thickness of the substrate 1, for example, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, or 60% of the thickness of the substrate 1. The protruding width of the latch 11 and the recessed depth of the locking groove 12 are 3 to 8 mm, for example, the width or depth can be selected as 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, or 8 mm. The protruding width of the latch 11 and the recessed depth of the locking groove 12 can be the same or different. The thickness of the latch 11 and the lock groove 12, combined with their depth and width, ensures that the strength of the latch 11 and the lock groove 12 meets the usage requirements.

[0068] like Figure 8 As shown, the end of the latch 11 away from the base plate is arc-shaped, which provides a certain guide for the latch 11 when it is inserted into the lock groove 1.

[0069] In a preferred embodiment, an insulating element is laid on the substrate 1. The insulating element is a 1-3 mm thick membrane containing an antifungal agent. This membrane can be made of IXPE, EVA, or cork, and can improve the product's noise reduction or sound insulation effect.

[0070] This utility model also provides a composite floor, including the aforementioned connecting substrate and covering. In this embodiment, ultra-thin ceramic tiles and substrate 1 are bonded together. The ultra-thin ceramic tiles and substrate 1 can be connected by any existing method, such as by adhesive bonding.

[0071] In combination Figure 5 As shown, the ultra-thin ceramic tile is bonded to the target surface of the substrate 1. After the ceramic tile and the substrate 1 are connected, the relative position between the edge of the ceramic tile and the edge of the substrate 1 also determines whether there is a gap between adjacent ceramic tiles after installation.

[0072] For example, in one scenario, the tile size is relatively small compared to the substrate size, and after installation, the edges of adjacent substrates are close together. In this case, there is a certain gap between adjacent tiles, and grout can be applied into this gap.

[0073] In another scenario, the substrate size is relatively small compared to the tile size, and after installation, the edges of adjacent tiles are close together. In this case, a seamless tile installation is formed.

[0074] The relative position between the edge of the tile and the edge of the substrate 1 can be determined according to customer requirements.

[0075] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A coupling base plate for a composite floor, for splicing of adjacent composite floors; characterized by: The invention relates to a substrate (1) with at least one side edge protruding a locking tongue (11) and at least one side edge recessing a locking groove (12); when the substrates (1) are spliced, the locking tongue (11) and the locking groove (12) on adjacent substrates (1) are connected; the two opposite sides of the locking tongue (11) contacting the locking groove (12) are locking tongue connecting surfaces (111), and the two opposite sides of the locking groove (12) contacting the locking tongue (11) are locking groove connecting surfaces (121). The locking tongue connecting surfaces (111) and / or the locking groove connecting surfaces (121) are provided with a plurality of groove holes (13), which increase the pulling force between the locking tongue (11) and the locking groove (12) by more than 1% at the same fitting degree.

2. The coupling base plate for a composite floor panel according to claim 1, characterized in that: The groove holes (13) are irregularly distributed on the locking tongue connecting surfaces (111) and the locking groove connecting surfaces (121).

3. The coupling base plate for a composite floor panel according to claim 1, wherein: The groove holes (13) include an opening part and an inner recess part connected to the opening part and recessed in the substrate; the opening part is located on the locking tongue connecting surface (111) or the locking groove connecting surface (121); the inner recess part is arc-shaped, and the maximum arc length of the inner recess part is less than the maximum circumference length of the closed hole when the groove hole is a closed hole.

4. The coupling base plate for a composite floor panel according to claim 3, wherein: The maximum diameter of the groove hole (13) is 60-100 microns.

5. The coupling base plate for a composite floor panel according to claim 3, wherein: The opening parts of all the groove holes (13) on each locking tongue connecting surface (111) or locking groove connecting surface (121) account for 30%-90% of the surface area of each locking tongue connecting surface (111) or locking groove connecting surface (121).

6. The joining base plate for a laminate floor according to any one of claims 1 to 5, wherein: The substrate (1) has two opposite target surfaces, one of which is used to connect with a cover in a composite floor, and the other of which is used as a laying surface; at least one end of the laying surface is connected to the side surface of the substrate (1) where the locking tongue (11) or the locking groove (12) is arranged, and is provided with a chamfer (100) or a transition arc.

7. The joining base plate for a laminate floor according to any one of claims 1 to 5, wherein: The end of the locking tongue (11) away from the substrate (1) is arc-shaped.

8. The joining base plate for a composite floor panel according to claim 1, wherein: The locking tongue connecting surface (111) and the locking groove connecting surface (121) are flush with the target surface of the substrate (1).

9. The joining base plate for a composite floor panel according to claim 1, wherein: The end of the locking tongue (11) close to the center of the substrate (1) is the root part, and the other end is the free part; at least one locking tongue connecting surface (111) is arranged obliquely, so that the thickness of the locking tongue (11) gradually increases from the free part to the root part. At least one locking groove connecting surface (121) is arranged obliquely, so that the size of the locking groove (12) gradually increases from the opening to the bottom surface. The inclination angle of the locking tongue connecting surface (111) or the locking groove connecting surface (121) relative to the target surface of the substrate (1) is α, and the range is 0°<α≤10°.

10. The joining substrate for a composite floor panel according to claim 9, characterized in that: The locking tongue (11) and the locking groove (12) are connected in an interference fit.

11. The base panel for a laminate flooring according to claim 8 or 9, wherein: The thickness of the locking tongue (11) and the locking groove (12) accounts for 30%-60% of the thickness of the substrate (1).

12. The joining base plate for a composite floor panel according to claim 6, wherein: The protruding width of the locking tongue (11) and the recess depth of the locking groove (12) are 3-8 mm.

13. The joining base plate for a composite floor panel according to claim 6, wherein: ​ 14. The joining base plate for a composite floor panel according to claim 6, wherein: The laying surface is provided with an insulation which is a 1-3 mm thick membrane.

15. A composite floor panel, characterized by: A covering and a joint baseboard for a composite floor according to any one of claims 1-14 are bonded together.

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