A cane or stick with motorised length adjustable device using a threaded member and matching aperture to set the length of two telscoping body members that are locked in position by a coupling ring

摘要

A linearly adjustable device such as a walking stick or cane or crutch, the device comprising a main body including at least two circular tubular body sections aligned along a longitudinal axis, said sections being operatively connected together for linear telescopic movement relative to one another in the axial direction; a threaded acme screw linear actuator operatively mounted within the main body for causing the relative axial movement between the body sections, the linear actuator including a drive and a power transmission mechanism operatively connected to the drive, the transmission mechanism including an elongated threaded member operatively connected to one of the body sections and a cooperating threaded member operatively connected to another of the body sections such that relative rotation between the elongated threaded member and the cooperating threaded member causes relative movement of the body sections; and a coupling ring releasably coupled to one of the body sections, the coupling ring including one or more biased members which cooperate with a longitudinal slot provided in the other body section for restricting relative rotation between the body sections. A battery powered electric motor operated by a variable speed switch moves the threaded member to move the body sections apart or closer between maximum and minimum stops.