Electromotive furniture drive

摘要

The system for raising and lowering a component of a piece of furniture comprises a threaded spindle attached to an electric motor. The component is mounted on a spindle nut (10) with an internal thread which moves along the spindle. An internally threaded locking insert (11) fits into a recess (15) in the top of the nut. The thread of the insert has greater play with respect to the spindle thread than that on the nut, so that it moves sideways to engage the nut with it when the spindle begins to revolve.