Collapsible support frame particularly for ironing boards

A collapsible support frame for an ironing board, comprising:

• a ground bearing base;
• at least an arm having one end linked with the bearing base and an other end restrained to the ironing board;
• and
• blocking removable means acting both on the arm and on the bearing base, and on the ironing board to maintain said arm erected in a working position at an adjustable level above the bearing base,
• wherein said blocking removable means comprises,
• at least two strut elements, one of which has ends articulated, when used, respectively to said arm and to said bearing base, while the other of the two strut elements is articulated, when used, to said arm and to the ironing board, and
• locking removable means for locking the position of said strut elements,
• each of said strut elements comprising a plurality of plate-shaped elements, packed with a friction spacing element between two adjacent ones of the plate-shaped elements, and having one end articulated to the arm or to the bearing base, or to the ironing board, and another end provided with a slot for loose articulation to the bearing base or to the ironing board, or to the arm, respectively, said locking removable means comprising a tension rod, axially slidably mounted, and acting to engage the slot and to pack said plurality of plate-shaped elements, and elastic means to load the tension rod, and an operation device, for neutralizing, upon activation, the elastic loading force of the tension rod, thus allowing the sliding displacement each other between plate-shaped elements and tension rod,
• wherein the plurality of plate-shaped elements is comprised of a group of sliding plate-shaped elements and of a group of friction plate-shaped elements, each said group of sliding plate-shaped elements providing at least 7 elements and each said group of friction plate-shaped elements providing at least 8 elements,
• each group of plate-shaped elements of each strut element providing elastic means for packing the plate-shaped sliding elements and the plate-shaped friction elements.