Patent ID: 8209801

Claim:
A leg lift mechanism for an electric bed or chair, comprising: a bed frame; a primary frame including a first structural component mounted with the bed frame and having a securing aperture, a second structural component pivotally connected with the first structural component through a first connecting element, a third structural component pivotally connected with the second structural component through a second connecting element, at least one first angle bracket mounted with the second structural component and having a sliding slot, at least one second angle bracket having an aperture, and a lift bracket having a pivot member pivotally connected with the bed frame and mounted with the second angle bracket, and a support portion abutted against a bottom of the third structural component; a driver including a positioning portion at one end pivotally connected with the first structural component through a first pin inserted through the securing aperture of the first structural component, and an extendable rod at the other end having a through hole aligned with the sliding slot of the first angle bracket; and a link rod including a first aperture at an end and a second aperture at the other end, the end of the link rod being pivotally connected with the extendable rod of the driver by a control pin inserted into the sliding slot of the first angle bracket, the through hole of the extendable rod and the first aperture of the link rod, and the other end of the link rod being pivotally connected with the second angle bracket by a second pin inserted into the aperture of the second angle bracket and the second aperture of the link rod, such that the link rod can be driven by the driver to cause different movements of the primary frame.