Collapsible supporting frame and furniture having same

A structure comprising:

• a first supporting unit and a second supporting unit disposed substantially symmetrically with each other, each comprising a first leg, a second leg, and one or more lateral connecting bars disposed between and fixedly connected with the first and second legs;
• and
• a first bar unit and a second bar unit disposed between the first and second supporting units, each comprising a first bar and a second bar,
• wherein
• the first and second bars are rotatably connected with each other at proximal ends thereof;
• a distal end of the first bar is rotatably connected with the first or second leg of the first supporting unit;
• a distal end of the second bar is rotatably connected with the first or second leg of the second supporting unit;
• rotational movement of the first and second bars pulls the first and second supporting units together or pushes the first and second supporting units away from each other;
• each of the first and second bars comprises an upper slot and a lower slot at the proximal end thereof, wherein the upper slots of the first and second bars are symmetrically disposed with respect to each other, and the lower slots of the first and second bars are symmetrically disposed with respect to each other;
• a first insert having a first end disposed in the upper slot of the first bar and rotatably connected with the first bar, and a second end disposed in the upper slot of the second bar and rotatably connected with the second bar;
• and
• a second insert having a first end disposed in the lower slot of the first bar and rotatably connected with the first bar, and a second end disposed in the lower slot of the second bar and rotatably connected with the second bar.

A structure comprising:

• a first supporting unit and a second supporting unit disposed substantially symmetrically with each other, each comprising a first leg, a second leg, and one or more lateral connecting bars disposed between and fixedly connected with the first and second legs;
• and
• a first bar unit and a second bar unit disposed between the first and second supporting units, each comprising a first bar and a second bar,
• wherein
• the first and second bars are rotatably connected with each other at proximal ends thereof;
• a distal end of the first bar is rotatably connected with the first or second leg of the first supporting unit;
• a distal end of the second bar is rotatably connected with the first or second leg of the second supporting unit;
• rotational movement of the first and second bars pulls the first and second supporting units together or pushes the first and second supporting units away from each other;
• each of the first and second legs of the first and second supporting units comprises a first bracket at an interior side thereof;
• each distal end of the first and second bars of the first and second bar units comprises a second bracket at an interior side thereof;
• each of the first and second brackets comprises an upper portion, a middle portion and a lower portion;
• the middle portion of the first bracket is fixedly connected with the first or second leg of the first or second supporting unit;
• the middle portion of the second bracket is fixedly connected with the first or second end of the first or second bar unit;
• the upper portion of the second bracket is rotatably connected with the upper portion of the first bracket;
• and
• the lower portion of the second bracket is rotatably connected with the lower portion of the first bracket.

A structure comprising:

• a first supporting unit and a second supporting unit disposed substantially symmetrically with each other, each comprising a first leg, a second leg, and one or more lateral connecting bars disposed between and fixedly connected with the first and second legs;
• a first bar unit and a second bar unit disposed between the first and second supporting units, each comprising a first bar and a second bar;
• and
• a plurality of longitudinal connecting bars, wherein
• the first and second bars are rotatably connected with each other at proximal ends thereof;
• a distal end of the first bar is rotatably connected with the first or second leg of the first supporting unit;
• a distal end of the second bar is rotatably connected with the first or second leg of the second supporting unit;
• rotational movement of the first and second bars pulls the first and second supporting units together or pushes the first and second supporting units away from each other;
• the first leg of each of the first and second supporting units comprises a first upper portion above the first bar unit;
• the plurality of longitudinal connecting bars is disposed between the first upper portions of the first legs of the first and second supporting units and removably connected with the first upper portions of the first legs, wherein the structure is a chair and the plurality of longitudinal connecting bars collectively serves as a backrest of the chair.