US Patent 7293309 Automatically operated bed

An automatically operated bed includes a support frame, a first frame, a first drive cylinder, a second frame, a second drive cylinder, an auxiliary frame, and a cushion. Thus, the first frame and the second frame are lifted or lowered by operation of the first drive cylinder and the second drive cylinder, so that the bed has a simplified construction, thereby decreasing the costs of fabrication. In addition, the auxiliary frame is disposed at a horizontal state by support of the push bar of the second frame until the auxiliary frame so that a user's lower leg is supported by the auxiliary frame in comfortable manner to prevent the user's leg from being bent excessively, thereby providing a comfortable sensation to the user.