A supporting frame includes a mounting assembly and a plurality of leg assemblies to support the mounting assembly. The mounting assembly includes first and second mounting units, at least one of which is extendable in a longitudinal or lateral direction of the mounting assembly. In some cases, the first and second mounting units are pivotally connected to each other and each of the leg assemblies is foldable relative to the first or second mounting unit, resulting in an extendable and foldable supporting frame. A supporting structure includes a supporting frame and first and second panels connected to the supporting frame. In some cases, the supporting structure is foldable in half.

A supporting frame includes a mounting assembly and a plurality of leg assemblies to support the mounting assembly. The mounting assembly includes first and second mounting units, at least one of which is extendable in a longitudinal or lateral direction of the mounting assembly. In some cases, the first and second mounting units are pivotally connected to each other and each of the leg assemblies is foldable relative to the first or second mounting unit, resulting in an extendable and foldable supporting frame. A supporting structure includes a supporting frame and first and second panels connected to the supporting frame. In some cases, the supporting structure is foldable in half.

An extension table (2) comprises a plurality of extension rails (4, 6) along the table (2) for adjusting a dimension of the table (2), wherein an extension rail (4) of the plurality of extension rails (4, 6) comprises, laterally disposed relative to each other, a middle part (4b); a first outer part (4a) connected to a first section (10) of the table (2) and slidable relative to the middle part (4b), a second outer part (4c) connected to a second section (12) of the table (2) and slidable relative to the middle part (4b), wherein the middle part (4b), the first outer part (4a), and the second outer part (4c) of the extension rail (4) each comprises an identically designed profile (106).

An extension table (2) comprises a plurality of extension rails (4, 6) along the table (2) for adjusting a dimension of the table (2), wherein an extension rail (4) of the plurality of extension rails (4, 6) comprises, laterally disposed relative to each other, a middle part (4b); a first outer part (4a) connected to a first section (10) of the table (2) and slidable relative to the middle part (4b), a second outer part (4c) connected to a second section (12) of the table (2) and slidable relative to the middle part (4b), wherein the middle part (4b), the first outer part (4a), and the second outer part (4c) of the extension rail (4) each comprises an identically designed profile (106).

A table with a central extension, includes a frame, two movable trays bearing on the frame and adapted to be brought close to one another to constitute a continuous surface on their own, or to be symmetrically brought away from each other, or independently of each other to enable the set-up of one or several so-called central extension(s) between the movable trays. The edges of the movable trays and of the extension(s) include at least one tab located on a first half of the edge and a groove located on a second half of the edge, the tab having a height increasing from its distal edge up to its central portion and decreasing from its central portion up to its proximal edge, and the depth of the groove being larger than the tab height, enabling an assembly by mortise-and-tenon joint even when the trays and/or the extension are deformed.

A table with a central extension, includes a frame, two movable trays bearing on the frame and adapted to be brought close to one another to constitute a continuous surface on their own, or to be symmetrically brought away from each other, or independently of each other to enable the set-up of one or several so-called central extension(s) between the movable trays. The edges of the movable trays and of the extension(s) include at least one tab located on a first half of the edge and a groove located on a second half of the edge, the tab having a height increasing from its distal edge up to its central portion and decreasing from its central portion up to its proximal edge, and the depth of the groove being larger than the tab height, enabling an assembly by mortise-and-tenon joint even when the trays and/or the extension are deformed.

An extension table (2) comprises a plurality of extension rails (4, 6) each extending along the table (2) for adjusting a dimension of the said table (2); an extension leaf (14); and a locking mechanism, comprising a first locking part (16) fixed to an extension rail (4) of the said plurality of extension rails (4, 6); and a second locking part (18) fixed to the extension leaf (14); wherein the first locking part (16) is lockable to the second locking part (18), when the extension leaf (14) is added to the extension table (2), so that the extension leaf (14) is prevented from being lifted upwards.

An extension table (2) comprises a plurality of extension rails (4, 6) each extending along the table (2) for adjusting a dimension of the said table (2); an extension leaf (14); and a locking mechanism, comprising a first locking part (16) fixed to an extension rail (4) of the said plurality of extension rails (4, 6); and a second locking part (18) fixed to the extension leaf (14); wherein the first locking part (16) is lockable to the second locking part (18), when the extension leaf (14) is added to the extension table (2), so that the extension leaf (14) is prevented from being lifted upwards.

A table with a central extension, includes a frame, two movable trays bearing on the frame and adapted to be brought close to one another to constitute a continuous surface on their own, or to be symmetrically brought away from each other, or independently of each other to enable the set-up of one or several so-called central extension(s) between the movable trays. The edges of the movable trays and of the extension(s) include at least one tab located on a first half of the edge and a groove located on a second half of the edge, the tab having a height increasing from its distal edge up to its central portion and decreasing from its central portion up to its proximal edge, and the depth of the groove being larger than the tab height, enabling an assembly by mortise-and-tenon joint even when the trays and/or the extension are deformed.

A table with a central extension, includes a frame, two movable trays bearing on the frame and adapted to be brought close to one another to constitute a continuous surface on their own, or to be symmetrically brought away from each other, or independently of each other to enable the set-up of one or several so-called central extension(s) between the movable trays. The edges of the movable trays and of the extension(s) include at least one tab located on a first half of the edge and a groove located on a second half of the edge, the tab having a height increasing from its distal edge up to its central portion and decreasing from its central portion up to its proximal edge, and the depth of the groove being larger than the tab height, enabling an assembly by mortise-and-tenon joint even when the trays and/or the extension are deformed.