Patent ID: 6851135
Filing Date: 2005-02-08
Classification: A47D

Abstract:
1. A foldable skeleton, comprising an upper frame, four upright rods, and a bottom frame, wherein: the upper frame includes two pairs of first rods, two pairs of second rods, four joints, and four connecting seats; the joints are mounted between two adjacent first rods and mounted between two adjacent second rods respectively; each of the joints includes a main base, a press button, a cover, a locking block, an elastic member, and two linking blocks; the main base has a first side plate formed with a receiving hole and a second side plate formed with a cruciform slot; each of the first rods has a first end pivotally mounted on an end of a respective one of the main base and a second end mounted on a respective one of the connecting seats; each of the second rods has a first end pivotally mounted on an end of a respective one of the main base and a second end mounted on a respective one of the connecting seats; the press button is movably mounted in the receiving hole of the second side plate of the main base; the cover is secured on the second side plate of the main base and has an inside formed with a receiving recess; the locking block is movably mounted in the cruciform slot of the main base and has a first portion formed with a mounting section secured on the press button to move therewith and a second portion formed with an action section that is movable into the receiving recess of the cover; the elastic member is mounted on the mounting section of the locking block and is urged between the press button and the main base to press the press button to move outward relative to the cover; each of the linking blocks has a first end mounted in the first end of each of the first rods or mounted in the first end of each of the second rods to pivot therewith and a second end detachably rested on the action section of the locking block, so that each of the linking blocks is fixed on the main base by the locking block; each of the four upright rods has a first end mounted on a respective one of the connecting seats; the bottom frame includes four support seats, four bottom rods, two linking gears, a connecting base, a pull member, and an operation member; each of the support seats is mounted on a second end of a respective one of the upright rods and has a side formed with a pivot ear; each of the bottom rods has a first end pivotally mounted on the pivot ear of a respective one of the support seats and a second end pivotally mounted on a respective one of the linking gears; each of the linking gears has a first end formed with two spaced side plates and a receiving space located between the two side plates, each of the two side plates of each of the linking gears has a first side formed with a cutout and a second side formed with a plurality of teeth, the teeth of the two linking gears mesh with each other; the connecting base is mounted on the linking gears to encompass the two linking gears; the pull member is mounted on the linking gears to move the two linking gears and includes a combination section mounted in the receiving space of each of the linking gears and a top plate mounted on a top of the combination section, the combination section of the pull member is formed with a receiving slot, and the top plate of the pull member is formed with a rectangular slot communicating with the receiving slot; and the operation member is rotatably mounted on the pull member and has a bottom formed with a rectangular press block rotatably mounted in the receiving slot of the pull member and rested on the cutout of the two linking gears.