Patent ID: 6138300
Filing Date: 2000-10-31
Classification: A47C

Abstract:
A futon frame convertible between a bed position and a sitting position, comprising:(a) a back portion oriented generally upright when the frame is in the sitting position and oriented horizontally when the frame is in the bed position the back portion comprising a pair of opposed outer edges;(b) a seat portion hingedly attached to the back portion to permit relative movement of the back portion with respect to the seat portion;(c) a connector releasably connecting the back portion and seat portion to cause the back portion to move on movement of the seat portion in a first direction about a pivot axis;(d) a support for supporting the back portion with respect to a supporting surface;(e) a pair of first pins, each connected to one of the outer edges of the back portion and the support;(f) a pair of first slots, each in the other of the outer edges of the back portion and the support, for constraining movement of the first pins within respective first slots, each first slot comprising a contact surface preventing upward movement of the pins with respect to the first slots when the frame is in the bed position and positioned such that the pins are releasable from the contact surface upon movement of the back portion in the first direction, when the frame is moved from its bed position to its sitting position;(g) the contact surfaces are curved and comprise an upper segment of the surfaces of the first slot.