Floor tile structure without adhesive coating at the bottom

#1. Field of the Invention

#A floor tile structure, which comprises a hard surface layer, a bottom layer, and a soft adhesive intermediate layer, wherein the periphery of the bottom layer is configured with a convex edge and a complementarily concave edge; and, the convex edge is protruded on the periphery of the surface layer, and the concave edge is embedded in the periphery of the surface layer.

#2. Description of the Background Art

#FIG. 1 is a cross-sectional view of a single structure according to the present invention;

#FIGS. 2 and 3 are partial schematic views of the edges of the floor tile according to the present invention;

#FIG. 4 is a cross-sectional view of the joining according to the present invention.

#A preferred embodiment according to the present invention is to attach a surface layer 14 and a bottom layer 16 on the upper and lower surfaces of the structure composed of a double-sided adhesive tape with pressure sensitivity in the intermediate layer 12, wherein the periphery 18 of the surface layer 14 is straight and provided with the structure made of hard material, such as ceramic, metal, rock or hard plastic. The bottom layer 16 is made of hard plastic or hard rubber and provided with a continuous periphery 20, as the L-type periphery shown in FIG. 2, forming as a convex portion 24 relative to the edge 22; and with another continuous periphery 26 in the bottom layer 16, as the L-type periphery shown in FIG. 3, forming as a concave portion 28 relative to the edge 22, and the concave portion 28 and the convex portion 24 can be formed as complementary in shape; further, the top surface 30 of the concave portion 28 is another adhesive surface of the intermediate layer 12.

#The floor tile structure according to the present invention is to laterally join two floor tiles with each other, with the joining manner shown in FIG. 4, wherein the convex portion 24 of one floor tile is engaged with the concave portion 28 of another floor tile, and the top surface of the convex portion 24 is attached with the top surface 30 of the concave portion 28. Thus, by engaging and adhering a plurality of convex portions 24 on the periphery of one floor tile with the concave portions 28 of another floor tile, these two floor tiles can be laterally joined. The convex portions 24 and the concave portions 28 for lateral joining between the floor tiles are not limited to the shapes shown in the figure, but may have any kinds of convex and concave shapes. The mutual engagement is not only purely joining two floor tiles, but only insert the convex portion 24 into the concave portion 28 for attaching on the concave portion 28. Therefore, it is not only a simple engagement function. Moreover, when the convex portion 24 and the concave portion 28 are engaged but not adhered, they don't have mutual limitation and can be separated laterally that this structure is different from the conventional engagement structure with male and female tenons.