Support element for a chair

A support element for a chair, said support element comprising:

• a support body, provided with an upper face and with an opposite lower face;
• a covering element, flexible, placed to cover at least the upper face of said support body and provided with a perimeter portion;
• a tensioning element, flexible, which is engaged with the perimeter portion of said covering element and is provided with a grip portion, which is susceptible of being stretched in order to tighten said covering element, and is constrained to said support body in order to maintain said covering element taut on said support body;
• at least one guide element, which is fixed to the lower face of said support body and is extended along a main extension direction;
• a traction element, which is mechanically connected to the grip portion of said tensioning element and is slidably engaged in said at least one guide element, in order to tighten said covering element among multiple tensioning positions;
• a coupling system, which is configured for removably coupling said traction element to said at least one guide element in a pre-established said tensioning position;
• wherein said at least one guide element is provided with at least one guide channel, which is extended substantially parallel to said main extension direction, and that said traction element comprises at least one guide pin, which projects protrudingly from said traction element, transverse to said main extension direction, and is configured for slidably engaging the at least one guide channel of said at least one guide element in order to guide said traction element along said main extension direction.

A support element for a chair, said support element comprising:

• a support body, provided with an upper face and with an opposite lower face;
• a covering element, flexible, placed to cover at least the upper face of said support body and provided with a perimeter portion;
• a tensioning element, flexible, which is engaged with the perimeter portion of said covering element and is provided with a grip portion, which is susceptible of being stretched in order to tighten said covering element, and is constrained to said support body in order to maintain said covering element taut on said support body;
• at least one guide element, which is fixed to the lower face of said support body and is extended along a main extension direction;
• a traction element, which is mechanically connected to the grip portion of said tensioning element and is slidably engaged in said at least one guide element, in order to tighten said covering element among multiple tensioning positions;
• a coupling system, which is configured for removably coupling said traction element to said at least one guide element in a pre-established said tensioning position;
• wherein said support body is provided with multiple guide wings, which are placed perimetrically on said lower face, and each guide wing defines a respective engagement seat in which at least part of said perimeter portion of said covering element is inserted.