Abstract: A knob-driven adjusting mechanism has two fastening belts, one adjusting device, two base seats and two shafts. The fastening belt goes through a long groove. The fastening belt is formed with a tooth row on the side of the long groove. The adjusting device has a shell seat and a knob, and each fastening belt respectively goes through the shell seat. The knob is configured on the shell seat in a rotary form to drive the fastening belts. Each base seat is respectively used for the two side parts configured on an object. The base seat has two protruding support parts. Each shaft is respectively configured on each base seat. The two ends of the shaft respectively goes into each support part in the axial direction. Each shaft is respectively connected to each fastening belt, so that each fastening belt can respectively rotate in relation to the base seat.

Abstract: A knob-driven adjusting mechanism has two fastening belts, one adjusting device, two base seats and two shafts. The fastening belt goes through a long groove. The fastening belt is formed with a tooth row on the side of the long groove. The adjusting device has a shell seat and a knob, and each fastening belt respectively goes through the shell seat. The knob is configured on the shell seat in a rotary form to drive the fastening belts. Each base seat is respectively used for the two side parts configured on an object. The base seat has two protruding support parts. Each shaft is respectively configured on each base seat. The two ends of the shaft respectively goes into each support part in the axial direction. Each shaft is respectively connected to each fastening belt, so that each fastening belt can respectively rotate in relation to the base seat.

Abstract: A pitman-style foldable frame structure has an innovative and unique assembled design. The frame structure includes foldable panels, a central spindle, lateral frames, oblique connecting rods, a control device, and a central connecting frame. The frame structure offers improvement over the prior art in lowering the material cost and increasing structural support strength and rigidity of the pitman-style foldable frame and achieves practical advancement and better industrial utilization effect.

Abstract: A pitman-style foldable frame structure has an innovative and unique assembled design. The frame structure includes foldable panels, a central spindle, lateral frames, oblique connecting rods, a control device, and a central connecting frame. The frame structure offers improvement over the prior art in lowering the material cost and increasing structural support strength and rigidity of the pitman-style foldable frame and achieves practical advancement and better industrial utilization effect.