Provided is a steering mechanism (8) including a swing bar (81a) which swings in response to input from a rider, a cam guide (83c) slidable on a peripheral surface of a column section (5a), a ball joint (82a) which slides the cam guide (83c) in response to the swinging of the swing bar (81a), a cam follower (83b) vertically provided on the peripheral surface of the column section (5a) to rotate the column section (5a) in response to the sliding of the cam guide (83c), and a coil spring (83e) which returns the cam guide (83c) to a predetermined rotation angle. The cam follower (83b) comes in contact with a cam surface (83c4) of the cam guide (83c) which has a recess surface shape, at two positions on the peripheral surface, in a state where the column section (5a) is located at a predetermined position.

This document describes accessory devices for wheelchairs. For example, this document describes wheelchair accessory devices that include a wheel and foot pedals so that a wheelchair user can use his/her legs to propel the wheelchair by pedaling.

A wheelchair having a frame and a drive wheel coupled to the frame. The drive wheel rotates relative to the frame about a first axis of rotation. A first push rim is coupled to the frame. The first push rim rotates relative to the frame about a second axis of rotation that extends substantially parallel to the first axis of rotation. A second push rim is coupled to the frame. The second push rim rotates relative to the frame about a third axis of rotation that extends substantially parallel to the first axis of rotation. A transmission transmits rotation of each of the first and second push rims to the drive wheel. Movement of the first push rim by a first arc length causes the drive wheel to rotate by a first angular displacement, and movement of the second push rim by the first arc length causes the drive wheel to rotate by a second angular displacement that is greater than the first angular displacement.

The invention relates to a mechanical wheelchair drive, comprising a rotatably mounted lever, a handle fastened to the lever, and a force transfer unit for transferring rotational motion of the lever to a wheelchair wheel, wherein the lever has a variable length and is guided along a closed guide of a guide plate, said guide deviating from the circular form, such that the length of the lever changes during the rotational motion.

A patient transport apparatus operable by a user for transporting a patient along stairs. A seat section is coupled to a support structure supporting a track assembly having a belt. A motor selectively generates torque to drive the belt. A user interface is arranged for engagement by the user, and has a direction input control for selecting a drive direction of the motor, and an activation input control for operating the motor to drive the belt. A controller in communication with the motor and the user interface is configured to limit operation of the motor in response to user engagement of the activation input control preceding engagement of the direction input control to prevent driving the belt, and to permit operation of the motor in response to user engagement of the activation input control following engagement of the direction input control to drive the belt in a selected drive direction.

Provided is a steering mechanism (8) including a swing bar (81a) which swings in response to input from a rider, a cam guide (83c) slidable on a peripheral surface of a column section (5a), a ball joint (82a) which slides the cam guide (83c) in response to the swinging of the swing bar (81a), a cam follower (83b) vertically provided on the peripheral surface of the column section (5a) to rotate the column section (5a) in response to the sliding of the cam guide (83c), and a coil spring (83e) which returns the cam guide (83c) to a predetermined rotation angle. The cam follower (83b) comes in contact with a cam surface (83c4) of the cam guide (83c) which has a recess surface shape, at two positions on the peripheral surface, in a state where the column section (5a) is located at a predetermined position.

This invention is a rotational manual propulsion wheel chair hand pedal to be fitted to the axles of both wheels of a wheel chair. The rotational wheel chair hand pedal is attached to the two large wheels of a wheel chair by means of being directly attached to the axles and or hubs securely of the wheel chair's wheels, or surrounding the hubs of the wheel chair's wheels. The rotational wheel chair hand pedal has an arm, which fits from the wheel chair's axle and or hub to the wheel chairs wheel's rim. The position of the handles is fixed by retractable and is adjustable by pressing a button at the end of the handle to retract the pins.

A reciprocating drive motion wheelchair is provided. The wheelchair device includes a low-profile wheelchair that utilizes push bars pivotally connected to the wheelchair frame and operably connected to a crank bar, which run parallel to the ground and connects back to a crank on each wheel. An additional pair of wheels is disposed rearward of the drive wheels and prevents the wheelchair from tipping, thus allowing the user to utilize the push bars to move the wheelchair quickly and easily.

A wheel frame (16a) includes a cylindrical hub (16c) into which an axle (11b) is rotatably inserted, a six-axis force sensor (16e) having an insertion hole (16e1) into which the hub (16c) is inserted, and an outer flange (16f) extending radially outward from an input section (16e2) of the six-axis force sensor (16e), wherein a hand rim (17) is attached to the outer flange (16f).

Provided is a wheelchair that can be easily operated with either a right or left hand. The wheelchair according to the present invention is provided with: a right-left pair of first handrims connected to handrim spokes; a right-left pair of second handrims connected to spokes; a first rotary shaft for transmitting a first rotational force generated by rotation of the left first handrim to a right wheel; and a second rotary shaft for transmitting a second rotational force generated by rotation of the right first handrim to a left wheel, wherein a first power transmission device on a right inner shaft of a right drive mechanism meshes with a second power transmission device on the second rotary shaft, and a third power transmission device on a right outer shaft of the right drive mechanism meshes with a fourth power transmission device on the first rotary shaft.