Multifunctional castor

A multifunctional castor comprising:

• a mounting seat with a shaft portion;
• a rotary seat rotatably mounted on the mounting seat and having a pivot portion pivoted to the shaft portion;
• an engaging member fixed in the rotary seat and including an engaging hole and an engaging tooth;
• a wheel rotatably disposed on the rotary seat and including a wheel toothed portion;
• a brake swing member including a brake pivot portion pivoted to the rotary seat, a brake press portion located at one side of the brake pivot portion, and a brake toothed portion located at another side of the brake pivot portion and used to engage with or disengage from the wheel toothed portion;
• a longitudinal rod assembly disposed in the shaft portion and the rotary seat in such a manner that the longitudinal rod assembly is moveable along an axial direction of the shaft portion and includes:
• a first end, a second end abutting against the brake press portion, and a first shoulder portion and a second shoulder portion between the first and second ends;
• an engaging assembly disposed between the first and second shoulder portions of the longitudinal rod assembly and including a protruding engaging portion for engaging with or disengaging from the engaging hole of the engaging member, and an engaging toothed portion for engaging with or disengaging from the engaging tooth of the engaging member;
• a transverse rod inserted in the shaft portion and including a push portion for pushing against the first end of the longitudinal rod assembly, and a press portion located opposite the push portion;
• a brake pedal pivotally mounted on the mounting seat and including an operation pivot portion pivoted to the mounting seat, an operation pedal portion located at one end of the operation pivot portion, and a directional stepped portion, a normal stepped portion and a brake stepped portion which are located at another end of the operation pivot portion and selectively pressed against the press portion of the transverse rod, when the normal stepped portion is pressed against the press portion, the protruding engaging portion and the engaging toothed portion of engaging assembly are disengaged from the engaging tooth and the engaging hole of the engaging member, respectively, the brake toothed portion of the brake swing member is disengaged from the wheel toothed portion of the wheel, so that the rotary seat is allowed to rotate with respect to the mounting seat, and the wheel is allowed to rotate relative to the rotary seat, when the directional stepped portion is pressed against the press portion, and the protruding engaging portion of the second toothed member is engaged in the engaging hole of the engaging member, the rotary seat is unable to rotate with respect to the mounting seat, when the brake stepped portion is pressed against the press portion, the engaging toothed portion of the engaging assembly is engaged with the engaging tooth of the engaging member, and the brake toothed portion of the brake swing member engages with the wheel toothed portion of the wheel, the wheel is stopped from rotating with respect to the rotary seat;
• and
• a brake-release pedal pivotally disposed in the mounting seat in such a manner that the brake-release pedal will pivot back to its original position after being pressed down, and pressing down the brake-release pedal makes the normal stepped portion of the brake pedal push against the press portion.