Combined skateboard scooter/exerciser

A combined skateboard scooter/exerciser comprising:

• a board;
• a steering rod rotatably supported by the board, the steering rod having an upper end and a lower end, the steering rod being rotatable relative to the board and movable back and forth relative to the board;
• a handlebar mounted to the upper end of the steering rod to move therewith;
• a steering device mounted to the lower end of the steering rod to move therewith, a wheel device being mounted to the steering device;
• and,
• a transmission device mounted between the lower end of the steering rod and the wheel device such that back and forth movement of the steering rod urges the wheel device to move forward via transmission by the transmission device;
• the transmission device including a transmission block and a transmission wheel, the transmission block including a first end securely engaged with the lower end of the steering rod, the transmission block further including a toothed second end for meshing with the transmission wheel;
• the transmission wheel including an outer tubular member and an inner member, the outer tubular member including a plurality of outer peripheral teeth for meshing with the toothed second end of the transmission block and a plurality of inner peripheral teeth, the inner member including a central hole for securely receiving a front axle rod, the wheel device including a front wheel securely mounted around the front axle rod to turn therewith, the inner member further including a movable tooth block on an outer periphery thereof, each of the inner peripheral teeth of the outer tubular member including an inclined surface and an engaging portion;
• wherein when the engaging portion of each of the inner peripheral teeth of the outer tubular member moves toward the tooth block of the inner member, the inner member is turned;
• and
• wherein when the inclined surface of each of the inner peripheral teeth of the outer tubular member moves toward the tooth block of the inner member, the tooth block is pressed yet the inner member is not turned.