Patent ID: 6951371
Filing Date: 2005-10-04
Classification: A47D

Abstract:
1. A multi-functional child high chair comprising: a pair of fore legs and a pair of rear legs relatively arcuate inward, said fore legs each having an upper and a lower through end a pair of holes spacedly formed in a lateral side above lower end, a plurality of inclined surfaces continuously formed on an inner side under said upper ends to define a plurality of shoulders at their lower ends, a slidingbar parallel connected to upper lateral side opposite to said through holes each having a guide groove centrally extended along the length thereof including a transverse outlet above their lower ends, a first stretcher including a pair of first caster seats perpendicular to two ends respectively sleeved onto the lower ends of said fore legs and each of the first caster seats having a turnable caster rotatably secured to lower end, said rear legs each having a coupling seat on a lateral side in mirror arrangement including a stop rod and an axial rod for rotatably securing a spare support which has a long portion engageable with the ground and an arcuate short portion engageable with the stop rod of said coupling seats, a second stretcher having a pair of second caster seats perpendicular to two ends thereof respectively sleeved onto the lower end of said rear legs and each including a pair of casters rotatably secured to lateral sides; a pair of circular joints of identical structure in mirror arrangement and each having an inner disk, an outer disk and an inner cap co-axially and rotatably connected by an axial pin, said inner disks each having a plurality of first stop blocks spacedly formed around inner circumference, an arcuate guide slot abutting an abnormal through hole in a lower portion and a first sleeve extended downward from a lower periphery connecting the upper end of said fore legs, said outer disks each having a plurality of second stop blocks spacedly formed around inner circumference made engageable with the first stop blocks of said inner disk, a small protrusion on an upper inner surface, a stop plate on an inner surface beneath the small protrusion, a through hole in a lower portion engaged with the abnormal through hole of said inner disks for receiving a button which is biased by a spring and secured at fore end by a fixed plate in the abnormal through hole and a second sleeve extended downward from an outer periphery to connect the upper end of said rear legs respectively; a chair seat having a pair of lateral walls each having a though hole in rear portion, a ring guide in fore outer portion, a guide rod in the ring guide, a guide plate above the guide rod, a lug on underside of rear portion and a protrudent triangular plate on a top of fore portion, and a horizontal U-shaped inlaid slit centrally formed in an upper surface of the chair seat for securing a central upright support which has a rectangular plate on bottom anchored within the U-shaped inlaid slit; a chair back having a pair of hollow interior lateral walls each having an aligned through hole above lower end engaged with the through holes of said chair seat and rotably connected by two pairs of fasteners each of which including a pair of elastic hooks and a plurality of transverse positioning groove on back side thereof; an angle adjustment device comprises a rectangular plate pivoted to a lug on said chair back by an axial pin, said plate having a pair of side walls each including a bevel upper edge and a concave lower edge, a circular ring centrally formed on an inner side abutting upper edge for anchoring one end of a spring which has another end stopped against the chair back, and an inverse U-shaped rod having a pair of transverse ends respectively engaged within the lugs under said chair seat, a transverse top selectively engaged one of the transverse positioning grooves for adjustment of the angle of elevation for said chair back and a pair of lateral portions being confined by the concave lower edges thereof; a pair of symmetrically arranged side support plates each having clipping plate including a rectangular hole in center engaged with the protrudent triangular plates of said chair seat respectively and a pair of aligned rectangular through holes spacedly formed under upper edge for engaging within a pair of hooked connecters under a small platform which having a plurality of retaining slots in lateral edges for holding a pair of elastic inlaid blocks under a large platform which can be slid to and fro on the small platform; a foot rest positioned under said chair seat through a pair of connection tubes which adjustably insert into a pair of sleeves beneath said chair seat and releasably secured by bolts and an inverse U-shaped collet in cooperation with a catch under lower end of said foot rest which is provided to clip the second stretcher when said rear legs are collapsed; a pair of rotary positioning joints respectively and rotatably engaged with said ring guide of said chair seat by a pair of axial rods, each having a rectangular tube through the body and extended downward to slidingly sleeve onto upper portion of said fore legs and attached to the sliding bars, a positioning handle pivoted to an outer surface by an axial pin and biased by a spring, a positioning rod connected to upper end of the positioning handle having a forward end stopped against one of the shoulders of said fore legs, an opening in lower portion abutting a stop edge for limiting the movement of the guide rod of the chair seat and an outer cap secured to outer surface thereof by screws, each of said outer caps having an extension covering outer surface of the rectangular tubes; a pair drag devices respectively disposed into said fore legs each having a box secured to lower portion of said fore legs by rivets, a movable guide connected to an underside of a sliding plate biased by a vertical spring on top, a linking-up cord having a lower end connected to a top of the sliding plate and an upper end connected to the small protrusion of said outer disk through the stop plate and a wrapper on upper portion of the cord blocked by the stop plate, an upper stopper inserted into the box via the upper through hole of the fore legs confined by the movable guide and a lower stopper inserted into the box via the lower through hole of said fore legs biased by a transverse spring, said upper and lower stopper being normally protruded to outside of said fore legs; when said movable guides are lifted upward by the rotation of the outer disks, the upper stoppers are forced to move inward in order to permit said rotary positioning joints together with said chair seat descending to the lower stoppers.