Dental chair with tilting backrest.

摘要

The pivoted backrest is supported at an angle to the seat (1) via a carrier (25), also allowing the backrest to more backwards and forwards relative to the seat (1). Both the seat (1) and the carrier (25) has a curved surface with a cooperating guide (37,41) allowing the backrest to more inwards towards the seat (1) as it is pivoted backwards and to move away from the seat (1) as it is pivoted forwards, with the print about which the backrest is pivoted moving in an open spiral curve. The carrier cam pivot as it is linked via a lead screw (39) with a motor drive comprising four motors (16-19) electronically controlled (20) in dependence on the actuation of individual. Keys (21-23) or programmed keys (P1-P3) located in the chair armrest.