초록 ▼

The dual power unit includes an elongate housing having mounted therein adjacent opposite ends thereof two power units, one of which is drivingly connected to the movable back of an armchair, and the other unit is connected to a movable footrest of an armchair. Each unit includes a pivotal shaft con

The dual power unit includes an elongate housing having mounted therein adjacent opposite ends thereof two power units, one of which is drivingly connected to the movable back of an armchair, and the other unit is connected to a movable footrest of an armchair. Each unit includes a pivotal shaft connected to the back or footrest of the armchair. Each such shaft is connected to the output shaft of an electronic motor reducer through a transmission-gear in the form of a screw extending transversely of the respective pivotal shaft. The screw is drivingly connected through a threaded slider which is in engagement with a pair of cam elements mounted on a respective pivotal shaft to impart pivotal movement thereto, and consquent movement to the portion of the armchair connected thereto.

대표청구항 ▼

[ What is claimed is:] [1.]1. A dual power unit for movement of a back and a footrest in a power-driven armchair, comprising an elongated casing (11) which, close to each end, has a transverse-movement shaft (12) which is connected to a shaft (13) of an electric motor reducer trough a transmission-g

[ What is claimed is:] [1.]1. A dual power unit for movement of a back and a footrest in a power-driven armchair, comprising an elongated casing (11) which, close to each end, has a transverse-movement shaft (12) which is connected to a shaft (13) of an electric motor reducer trough a transmission-gear (15), the transmission-gear comprising a screw (16) connected to the shaft (13) of the motor reducer and extended transversely of the movement shaft (12) and longitudinally of the casing and a threaded sliding slider (17) into which the screw is screwed down, cam means being integral with the movement shaft and bearing on the slider for converting the sliding movement of the slider along the screw into an angular-rotation movement of the movement shaft, characterized in that the screw (16) thoroughly crosses the slider (17) and in that the cam means comprises two cam elements (19, 20) laterally projecting from the movement shaft for resting on thrust surfaces (21, 22) provided on the slider, on opposite sides of the screw.