Abstract: A wheelchair includes a main body having a main frame with two rear wheels, a connecting frame securely connected to two side frames of the main frame, and a steering/driving device. The steering/driving device includes a handlebar, a connecting member, a wheel frame connected to the handlebar, a front wheel rotatably mounted to the wheel frame, and a transmission mechanism. The connecting member includes a first end securely connected to a front end of the connecting frame and a second end pivotally connected to the handlebar. The transmission mechanism includes a transmission block and a transmission gear device. The transmission block is securely connected to the handlebar. The transmission gear device is coupled with a shaft of the front wheel. The wheelchair is moved forward when a user in the wheelchair manipulates the handlebar back and forth while providing a steering function of the wheelchair.

Abstract: A combined skateboard scooter/exerciser comprises a handlebar, a board, a steering device, a transmission device, and a wheel device. The steering rod is rotatably supported by the board and thus rotatable relative to the board. In addition, the steering rod is movable back and forth relative to the board. The handlebar is mounted to an upper end of the steering rod to move therewith. The steering device is mounted to a lower end of the steering rod to move therewith. The wheel device is mounted to the steering device. The transmission device is 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.

Abstract: A combined skateboard scooter/exerciser comprises a handlebar, a board, a steering device, a transmission device, and a wheel device. The steering rod is rotatably supported by the board and thus rotatable relative to the board. In addition, the steering rod is movable back and forth relative to the board. The handlebar is mounted to an upper end of the steering rod to move therewith. The steering device is mounted to a lower end of the steering rod to move therewith. The wheel device is mounted to the steering device. The transmission device is 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.

Abstract: A combined skateboard scooter/exerciser comprises a handlebar, a front body, a transmission device, a wheel device, and a board. A rear end of the front body is pivoted to the board and includes a slot through which a steering rod extends. The steering rod is attached to the handlebar to move therewith and movable along the slot. The transmission device is engaged with 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 wheel device includes wheels attached to front and rear ends of the board. The user may stand on the board and operate the handlebar and the steering rod to move back and forth to thereby move the combined skateboard scooter/exerciser forward while achieving a rowing-like exercise effect.