Wood floor
By using the beveled self-locking design of dovetail grooves and dovetail tenons, and combining the through-type tenon and groove with the L-shaped platform surface, the problem of loosening of wood flooring connections under humidity changes and stress is solved, thus improving the stability and service life of the wood flooring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN YIBAIFEN WOOD IND CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-05
AI Technical Summary
The tenon structure of existing wood flooring is prone to loosening and cracking under changes in humidity and stress, resulting in unstable connections, especially in areas with large temperature differences or high-frequency foot traffic.
The structure employs dovetail grooves and dovetail tenons. The dovetail tenons are set perpendicular to the direction of the wood fibers. The dovetail tenons and the beveled edges of the dovetail grooves create a self-locking effect. Combined with the through-type tenon and groove and the L-shaped platform surface, a multi-directional force transmission path is formed, which increases the stability of the connection. A groove is set on the bottom surface of the base layer to buffer stress.
It effectively solves the problem of loosening of wood flooring connections due to humidity changes and stress, improves the connection stability and service life of wood flooring, reduces the risk of cracking at the joints, and adapts to the shrinkage and expansion deformation of wood.
Smart Images
Figure CN224200206U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of decorative materials technology, and in particular to a type of wood flooring. Background Technology
[0002] Existing wood flooring typically uses round dovetail joints as the tenon structure, a design with significant technical flaws. The round dovetail relies primarily on the glued area and friction between the wood and the round dove for fixation. In actual use, wood shrinks and deforms due to humidity changes, causing the glued joints to crack and the tenon structure to loosen. This structural defect is particularly pronounced in environments with large temperature variations. Furthermore, existing wood flooring commonly uses a simple tongue-and-groove joint, which is significantly inadequate in terms of pull-out resistance. When the wood flooring is subjected to an upward pulling force, the tongue and groove joint easily separates due to wood expansion or contraction, and the tenon easily comes out of the groove. This is mainly because the connection between the tongue and groove relies solely on the friction on the side of the tenon and a limited glued area, which cannot effectively resist upward pulling forces. This problem is especially noticeable on stairs or in high-traffic areas. In these specific usage scenarios, the tenon will gradually be pulled out due to repeated stress, eventually leading to cracks in the wood flooring joints, severely affecting the performance and lifespan of the flooring. Therefore, existing technologies urgently need improvement to address these issues. Utility Model Content
[0003] The purpose of this utility model is to provide a wood flooring to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: First, this utility model provides a wood floor, including a base layer and a surface layer. The top surface of the base layer is provided with a dovetail groove, which is set perpendicular to the direction of the wood fibers on the base layer. A dovetail tenon is provided in the dovetail groove, and the surface layer is glued to the top surface of the base layer and the dovetail tenon.
[0005] The base layer has a left latching edge and a right tongue edge for fastening on both sides along the direction of the wood fibers, wherein:
[0006] The middle part of the left buckle is recessed to form a groove, which is open to the side. The upper groove surface of the groove is open at the end of the opening. The lower groove surface of the groove extends outward along the groove surface direction, and a buckle is provided at the end of the extension. The buckle has a straight surface in the direction towards the bottom groove surface of the groove, and the straight surface is parallel to the bottom groove surface of the groove.
[0007] The upper part of the right tongue protrudes outward to form a bump, and the outer contour of the bump is consistent with the inner contour of the groove.
[0008] Compared to traditional dovetail tenons, the dovetail tenon provided by this utility model is set perpendicular to the direction of the wood fibers on the base layer. The beveled side of the dovetail can convert the lateral tensile force into the friction and compression force of the tenon and groove contact surface, forming a "self-locking" effect. At the same time, it can adapt to the shrinkage and expansion of wood due to dryness and wetness, effectively solving the problem of loose connection caused by the cracking of glue seams in the splicing structure of wood flooring.
[0009] The open upper groove surface of the left snap-fit groove in this technical solution allows the right tongue-side protrusion to be inserted at an inclined angle. During splicing, the protrusion is inserted into the groove at an inclined angle and a certain force is applied downward, so that the protrusion is locked between the straight surface and the lower groove surface of the groove, that is, the lower side of the protrusion is in contact with and fits against the lower groove surface of the groove. At this time, the contact between the straight surface and the protrusion forms a rigid barrier in the horizontal direction, which can limit the displacement of the protrusion in the horizontal direction. At the same time, the upper side of the protrusion fits against the upper groove surface of the groove, further limiting the displacement of the protrusion in the vertical direction. The outer contour of the protrusion contacts and fits against the inner contour of the groove, effectively improving the connection stability between the wood flooring.
[0010] As an extension of the above solution, the base layer is provided with a tenon and a mortise on the front and rear faces of the wood fiber direction, respectively. The mortise is completely through the left and right sides. The upper groove surface of the mortise is flush with the lower groove surface of the groove. The end of the mortise where it intersects with the fastener is the open end of the upper groove surface, so that the end face of the fastener is flush with the bottom groove surface of the mortise.
[0011] The outer contour of the tenon is similar to the inner contour of the mortise. The upper side of the tenon is flush with the lower groove surface of the groove, forming an L-shaped platform surface, which is used to support the lower side of the protrusion and the upper groove surface of the mortise.
[0012] This extended solution, after the wooden boards are spliced, forms a multi-directional force transmission path in three-dimensional space through the combination of through-hole mortise and tenon joints and L-shaped platform surfaces. This avoids splicing separation or tearing damage to the edges of the mortise and tenon joints when the force is concentrated or excessive on one side in the left-right or front-back directions.
[0013] As an extension of the above solution, the bottom surface of the base layer is provided with several parallel grooves. The air circulation channels formed by the grooves can accelerate the dissipation of moisture between the bottom surface of the base layer and the laying layer, reducing the probability of expansion and deformation caused by moisture accumulation. At the same time, the regularly arranged parallel grooves form a systematic stress buffer system. When the wood undergoes volume changes, the groove gaps can absorb some of the deformation, allowing residual stress to be evenly distributed to each groove unit, thereby maintaining the overall flatness of the base layer.
[0014] As an extension of the above solution, the upper side of the protrusion is provided with an obtuse-angled step, which fits against the upper groove surface of the groove.
[0015] This extended solution effectively enhances the pull-out strength at the connection between the protrusion and the groove, solves the problem of increased gap caused by material shrinkage, and the horizontal clamping force generated by the inclined contact makes the connection structure self-locking in the vertical direction. When the wood shrinks, the inclined step automatically adjusts the contact position to compensate for the gap, maintains the continuous fit of the connection surface, and prevents the protrusion from loosening and falling off.
[0016] As an extension of the above solution, the distance between the straight surface of the buckle and the bottom groove surface of the groove is greater than the distance between the outer side surface of the obtuse-angled step and the bottom groove surface of the groove.
[0017] This extended design ensures sufficient lateral groove space for the insertion and assembly of the protrusion. When the protrusion is about to be inserted, only a small amount of force is needed to press it completely into the groove, so that the groove and the protrusion fit together.
[0018] As an extension of the above solution, the top of the interlocking strip is a rounded top surface. This extended solution effectively eliminates the cumulative dimensional deviation when multiple pieces of wood flooring are spliced continuously, ensuring that the end boards in corridors or large areas can be installed normally without cutting, reducing the number of construction adjustments and material waste.
[0019] As an extension of the above solution, the highest point of the arc-shaped top surface is lower than the midpoint of the bottom groove surface of the groove. The height of the arc-shaped top surface is set to avoid the edge of the fastener cracking easily when the insertion force is applied due to excessive height, thus ensuring smooth assembly.
[0020] As an extension of the above solution, the height of the straight surface is 4-5 mm. By optimizing the height range of the straight surface, damage to the wood edges during installation is avoided, while ensuring a stable contact area between the vertical surface and the bottom groove surface.
[0021] As an extension of the above solution, the dovetail groove and / or dovetail tenon is a trapezoidal shape with a narrow top and wide bottom, and the thickness of the dovetail tenon is 0.6-0.7 times the thickness of the base layer. This extended solution maintains the effective contact area between the dovetail tenon and the dovetail groove, while avoiding a reduction in overall strength due to excessive cutting of the base wood fibers caused by an excessively thick dovetail tenon.
[0022] As an extension of the above solution, the spacing between adjacent dovetail tenons is 28-33cm. When the wood shrinks along its fiber direction due to changes in environmental humidity, the 28-33cm spacing allows for an effective support zone between adjacent dovetail tenons. The amount of wood shrinkage within each support zone is controlled within the tolerance range of the glued surface, avoiding excessive stress concentration at a single point that could lead to cracking of the glue joint. Attached Figure Description
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0024] Figure 1 This is an exploded structural diagram of the wood flooring in the embodiment;
[0025] Figure 2 This is a schematic diagram of the end face structure of the wood flooring in an embodiment;
[0026] Figure 3 yes Figure 2 A magnified view of part A in the middle;
[0027] Figure 4 yes Figure 2 A magnified view of part B in the middle section;
[0028] Figure 5 This is a schematic diagram of the front end structure of the wood flooring in an embodiment;
[0029] Figure 6 This is a schematic diagram of the rear end face structure of the wood flooring in an embodiment.
[0030] In the attached diagram: 100: base layer, 110: dovetail groove, 120: dovetail tenon, 130: groove, 200: surface layer, 300: left snap edge, 310: groove, 311: upper groove surface of groove, 312: lower groove surface of groove, 313: bottom groove surface of groove, 320: snap strip, 321: straight surface, 400: right tongue edge, 410: protrusion, 411: obtuse angle step, 500: front end face, 510: tenon, 511: upper side of tenon, 600: rear end face, 610: mortise and tenon. Detailed Implementation
[0031] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0032] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0033] In the description of this utility model, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.
[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0035] Reference Figures 1 to 6 The following are several embodiments of a wood flooring according to the present invention.
[0036] like Figures 1-4 As shown, in some embodiments, a wood flooring includes a base layer 100 and a surface layer 200. The top surface of the base layer 100 is provided with a dovetail groove 110, which is perpendicular to the direction of the wood fibers on the base layer 100. Figure 1 As shown in the front-to-back direction (i.e., the length direction of the wood flooring), the dovetail groove 110 is provided with a dovetail tenon 120, and the surface layer 200 is glued to the top surface of the base layer 100 and the dovetail tenon 120. A dovetail groove refers to a groove structure with a trapezoidal cross-section, the groove extending perpendicular to the wood fibers, and can be formed by milling. Its design perpendicular to the fiber direction can disperse the lateral stress generated by wood shrinkage. A dovetail tenon refers to a trapezoidal insert that matches the shape of the dovetail groove, and can be made of hardwood or composite materials. Its top-narrow and bottom-wide structure forms a mechanical interlock after gluing, preventing lateral displacement.
[0037] The base layer 100 has a left latching edge 300 and a right tongue edge 400 on both sides along the direction of the wood fibers for fastening, wherein:
[0038] The left buckle 300 has a recessed groove 310 in the middle. The groove 310 is open to the side. The side-opening design of the groove 310 allows the right tongue protrusion 410 to slide in laterally. The upper groove surface 311 of the groove 310 is open upward at the open end position. Opening upward means that the upper groove surface 311 of the groove 310 is inclined upward at the end position, which expands the side-opening groove. This structure provides room for the protrusion 410 to be inserted.
[0039] The lower groove surface 312 of the groove 310 extends outward along the groove surface direction, and a buckle 320 is provided at the end of the extension. The buckle 320 has a straight surface 321 in the direction facing the bottom groove surface of the groove 310. The straight surface 321 is parallel to the bottom groove surface 313 of the groove 310. The straight surface 321 refers to a planar structure perpendicular to the lower groove surface of the groove. After the protrusion is inserted, the straight surface contacts the protrusion to form a rigid block in the horizontal direction, which can limit the displacement of the protrusion in the horizontal direction.
[0040] The upper part of the right tongue edge 400 protrudes outward to form a protrusion 410. The outer contour of the protrusion 410 is consistent with the inner contour of the groove 310. The protrusion of the right tongue edge refers to a protrusion whose shape is complementary to that of the groove on the left buckle edge, and its outer contour matches the groove.
[0041] In this embodiment, the dovetail tenon is set perpendicular to the direction of the wood fibers on the base layer. The bevel of the dovetail can convert the lateral tensile force into the friction and compression force of the tenon and groove contact surface, forming a "self-locking" effect. At the same time, it can adapt to the shrinkage and expansion of wood. The lateral shrinkage and expansion rate of wood is relatively high. The vertically set dovetail tenon can dynamically adapt to slight deformation through the trapezoidal structure: when dry, a small gap is generated between the tenon and groove due to shrinkage, but the bevel of the dovetail can still limit the longitudinal movement of the tenon; when wet, the expansion of wood makes the tenon and groove interlock more tightly, avoiding the compression crack caused by expansion, effectively solving the problem of loose connection caused by glue cracking in the splicing structure of wood flooring.
[0042] The open upper groove surface of the left snap-on groove allows the right tongue-side protrusion to be inserted at an angle. During splicing, the protrusion is inserted into the groove at an angle and a certain force is applied downwards, so that the protrusion is locked between the straight surface and the lower groove surface of the groove. That is, the lower side of the protrusion is in contact with and fits against the lower groove surface of the groove. At this time, the contact between the straight surface and the protrusion forms a rigid barrier in the horizontal direction, which can limit the displacement of the protrusion in the horizontal direction. At the same time, the upper side of the protrusion fits against the upper groove surface of the groove, further limiting the displacement of the protrusion in the vertical direction. The outer contour of the protrusion is in contact with and fits against the inner contour of the groove, effectively improving the connection stability between the wood flooring.
[0043] like Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, the base layer 100 is provided with a tenon 510 and a mortise 610 on the front end face 500 and the rear end face 600 of the wood fiber direction, respectively. The mortise 610 completely penetrates the left and right sides. The upper groove surface of the mortise 610 is flush with the lower groove surface 312 of the groove 310. The end of the mortise 610 where it intersects with the fastener 320 is the end with the upper groove surface open, so that the end face of the fastener 320 is flush with the bottom groove surface of the mortise 610.
[0044] The outer contour of the tenon 510 is similar to the inner contour of the mortise 610. The upper side 511 of the tenon 510 is flush with the lower groove surface 312 of the groove 310, forming an L-shaped platform surface, which is used to support the lower side of the protrusion 410 and the upper groove surface of the mortise 610.
[0045] In this embodiment, the mortise and tenon completely penetrating both sides means that the mortise and tenon forms a through-groove structure in the width direction of the base layer, which can be milled through both sides of the base layer. This design allows the tenons of adjacent floorboards to be inserted into the same mortise and tenon simultaneously, forming multi-point contact support. The open end of the upper groove surface of the mortise and tenon means that the top of the mortise and tenon forms an unobstructed opening at the intersection with the fastener strip. This structure allows the end of the fastener strip and the rear side of the tenon to form surface contact with the bottom of the groove when they are inserted into the mortise and tenon.
[0046] The L-shaped platform surface refers to the upper side 511 (i.e. the top surface of the tenon) of the rear end face 500 being flush with the lower groove surface 312 of the groove 310 of the left snap edge 300 and connected at the corner, forming an L-shaped planar structure with a right-angle transition. This L-shaped platform surface can effectively bear the downward pressure of the upper protrusion and the contact force of the tenon groove. Since the two sides of the corner are used to form the overall platform force-bearing surface, the force support at the corner can be significantly improved after the wood boards are spliced. Through the combination of the through tenon groove and the L-shaped platform surface, a multi-directional force transmission path is formed in three-dimensional space, avoiding splicing separation or tearing damage to the edge of the tenon groove when the force is concentrated or too heavy on one side in the left-right or front-back direction.
[0047] like Figure 2 As shown, in some embodiments, the bottom surface of the base layer 100 is provided with a plurality of grooves 130 arranged in parallel. A groove is a linear groove continuously formed along a specific direction on the lower surface of the base layer. By increasing the surface area of the base layer's bottom surface, the grooves promote a more uniform moisture exchange rate, reducing warping caused by localized differences in moisture content. The air circulation channels formed by the grooves also accelerate the dissipation of moisture between the base layer's bottom surface and the laying layer, reducing the probability of expansion deformation caused by moisture accumulation. Simultaneously, the regularly arranged parallel grooves form a systematic stress buffer system. When the wood undergoes volume changes, the groove gaps can absorb some of the deformation, allowing residual stress to be evenly distributed to each groove unit, thereby maintaining the overall flatness of the base layer.
[0048] like Figure 3 and 4 As shown, in some embodiments, the upper side of the protrusion 410 is provided with an obtuse-angled step 411, which fits against the upper groove surface 311 of the groove 310. An obtuse-angled step refers to a stepped structure formed by two intersecting planes with an angle greater than 90 degrees. The inclination direction matches the contact trajectory of the upper groove surface, so that the inclined surface of the step forms a surface contact with the upper groove surface.
[0049] When the protrusion is inserted into the groove, the inclined surface of the obtuse-angled step makes continuous planar contact with the groove surface. At this time, the vertical external force is decomposed into a normal force perpendicular to the inclined surface and a shear force parallel to the inclined surface. The normal force generates friction between the contact surfaces, and the shear force is converted into a horizontal pressing force on the base layer through the angle of the inclined surface. When the material expands or contracts, the inclined surface of the obtuse-angled step allows the protrusion to make a slight displacement along the inclined surface, compensating for dimensional changes by changing the contact position, while maintaining an effective pressing state of the contact surfaces.
[0050] This embodiment effectively enhances the pull-out strength at the connection between the protrusion and the groove, solves the problem of increased gap caused by material shrinkage, and the horizontal clamping force generated by the inclined contact makes the connection structure self-locking in the vertical direction. When the wood shrinks, the inclined step automatically adjusts the contact position to compensate for the gap, maintains the continuous fit of the connection surface, and prevents the protrusion from loosening and falling off.
[0051] like Figure 3 and Figure 4 As shown, in some embodiments, the distance between the straight surface 321 of the buckle 320 and the bottom groove surface 313 of the groove 310 is greater than the distance between the outer side of the obtuse-angled step 411 and the bottom groove surface 313 of the groove 310. This embodiment can ensure the lateral groove space of the groove, providing sufficient space for the insertion and assembly of the protrusion. When the insertion is about to be in place, only a small force needs to be applied to press the protrusion completely into the groove, so that the groove and the protrusion fit together.
[0052] like Figure 3 As shown, in some embodiments, the top of the interlocking strip is an arc-shaped surface. An arc-shaped surface refers to an outer contour of the top of the interlocking strip that is continuously curved, with its radius parameter designed to match the curvature of the bottom surface of adjacent protrusions. During the splicing process, the arc surface guides the protrusions into the groove and automatically adjusts their positional offset. The contact point between the arc-shaped surface and the bottom surface of the protrusion dynamically changes with the insertion depth, forcing the protrusions to slide along the tangent of the arc, thereby causing the entire piece of wood flooring to undergo lateral micro-adjustment. This dynamic adjustment process avoids the gradual accumulation of errors along the laying direction.
[0053] This embodiment effectively eliminates the cumulative dimensional deviation when multiple pieces of wood flooring are spliced continuously, ensuring that the end boards in corridors or large areas can be installed normally without cutting, reducing the number of construction adjustments and material waste.
[0054] In some embodiments, the highest point of the arc-shaped top surface is lower than the midpoint of the bottom groove surface of the groove. The midpoint of the bottom groove surface of the groove refers to the middle position of the bottom groove surface along the height direction. The height of the straight surface is 4-5 mm. The height setting of the arc-shaped top surface avoids insufficient contact area due to insufficient height, which would reduce pull-out resistance, or excessive height, which would easily cause the edge of the fastener to crack when the insertion force is applied. By limiting the height range of the vertical surface, while ensuring smooth assembly, the parallel contact between the vertical surface and the bottom groove surface resists the lateral separation force. At the same time, a deformation buffer gap is formed between the top of the fastener and the upper groove surface of the groove to accommodate the expansion and deformation of the wood after it gets damp. This embodiment optimizes the height range of the straight surface to avoid damage to the wood edge during installation and ensures that the vertical surface and the bottom groove surface form a stable contact area.
[0055] like Figure 1 As shown, in some embodiments, the dovetail groove 110 and / or dovetail tenon 120 are trapezoidal with a narrow top and wide bottom, and the thickness of the dovetail tenon 120 is 0.6-0.7 times the thickness of the base layer 100. The spacing between adjacent dovetail tenons is 28-33 cm. In some specific embodiments, the dovetail tenons can be arranged at intervals along the length of the base layer, and the bottom width of the tenon can be set to 1.2-1.5 times the top width, with the slope angle controlled within the range of 75-80 degrees. When the wood flooring shrinks due to humidity changes, the two sides of the trapezoidal structure exert guiding constraints on the dovetail tenon, forcing the tenon to maintain contact pressure with the groove wall when moving along the slope direction. When subjected to vertical lifting force, the normal force component of the contact surface between the tenon and the groove wall is converted into frictional resistance, forming a self-locking effect. The thickness of the tenon is adopted in an appropriate proportion, which maintains the effective contact area between the dovetail tenon and the dovetail groove, and avoids reducing the overall strength due to excessive cutting area of the base wood fibers caused by excessively thick dovetail tenons.
[0056] This embodiment effectively suppresses the widening of the tenon-groove gap caused by wood shrinkage. In high-frequency vibration scenarios such as stair treads, the interlocking of the dovetail tenon and dovetail groove prevents them from coming loose. The thickness ratio setting ensures a more uniform stress distribution when the tenon is subjected to bending loads, avoiding the risk of fracture caused by stress concentration. When the wood shrinks along the fiber direction due to changes in environmental humidity, the 28-33cm spacing allows for an effective support zone between adjacent dovetail tenons. The amount of wood shrinkage within each support zone is controlled within the range that the glued surface can withstand, avoiding excessive stress concentration at a single point that could lead to cracking of the glue joint.
[0057] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A type of wood flooring, characterized in that: It includes a base layer (100) and a surface layer (200). The top surface of the base layer (100) is provided with a dovetail groove (110). The dovetail groove (110) is set perpendicular to the direction of the wood fibers on the base layer (100). A dovetail tenon (120) is provided in the dovetail groove (110). The surface layer (200) is glued to the top surfaces of the base layer (100) and the dovetail tenon (120). The base layer (100) has a left latching edge (300) and a right tongue edge (400) for fastening on both sides along the direction of the wood fibers, wherein: The left buckle edge (300) has a recessed groove (310) in the middle. The groove (310) is open to the side. The upper groove surface of the groove (310) is open at the end. The lower groove surface of the groove (310) extends outward along the groove surface direction and a buckle strip (320) is provided at the end of the extension. The buckle strip (320) has a straight surface (321) facing the bottom groove surface of the groove (310). The straight surface (321) is parallel to the bottom groove surface of the groove (310). The upper part of the right tongue edge (400) protrudes outward to form a protrusion (410), and the outer contour of the protrusion (410) is consistent with the inner contour of the groove (310).
2. The wood flooring according to claim 1, characterized in that: The base layer (100) is provided with a tenon (510) and a mortise (610) on the front end face (500) and the rear end face (600) of the wood fiber direction, respectively. The mortise (610) completely penetrates the left and right sides. The upper groove surface of the mortise (610) is flush with the lower groove surface of the groove (310). The end of the mortise (610) intersecting with the buckle (320) is the end with the upper groove surface open, so that the end face of the buckle (320) is flush with the bottom groove surface of the mortise (610). The outer contour of the tenon (510) is similar to the inner contour of the mortise (610). The upper side of the tenon (510) is flush with the lower groove surface of the groove (310) to form an L-shaped platform surface, which is used to support the lower side of the protrusion (410) and the upper groove surface of the mortise (610).
3. The wood flooring according to claim 1, characterized in that: The bottom surface of the base layer (100) is provided with several grooves (130) arranged in parallel.
4. The wood flooring according to claim 1, characterized in that, The upper side of the protrusion (410) is provided with an obtuse-angled step (411) that is inclined, and the obtuse-angled step (411) is in contact with the upper groove surface of the groove (310).
5. A type of wood flooring according to claim 4, characterized in that, The distance between the straight surface (321) of the buckle (320) and the bottom groove surface of the groove (310) is greater than the distance between the outer side of the obtuse angle step (411) and the bottom groove surface of the groove (310).
6. The wood flooring according to claim 1, characterized in that, The top of the buckle (320) is an arc-shaped top surface.
7. A type of wood flooring according to claim 6, characterized in that, The highest point of the arc-shaped top surface is lower than the midpoint of the bottom groove surface of the groove (310).
8. A type of wood flooring according to claim 1, characterized in that, The height of the straight surface (321) is 4-5 mm.
9. A type of wood flooring according to claim 1, characterized in that, The dovetail groove (110) and / or dovetail tenon (120) are trapezoidal with a narrow top and a wide bottom, and the thickness of the dovetail tenon (120) is 0.6-0.7 times the thickness of the base layer (100).
10. A type of wood flooring according to claim 1, characterized in that, The spacing between adjacent dovetail tenons (120) is 28-33cm.