VARIABLE AREA FRAME AND VARIABLE VOLUME THREE-DIMENSIONAL STRUCTURE USING EXTENDABLE ARM

摘要

A variable area frame includes: extendable arms forming each side of a polygonal frame; and a coupling mechanism that couples adjoining two of the extendable arms so that these two extendable arms can move together, in order to allow adjoining two sides of the polygonal frame to extend and contract together. Each extendable arm includes a plurality of cross units each formed by pivotally coupling two rigid members, which cross each other to form an X-shape, via a middle coupling shaft, and an end coupling portion that pivotally couples ends of adjoining ones of the cross units.

主权项

1. A variable area frame as a polygonal frame whose area can be changed, comprising:
extendable arms forming each side of said polygonal frame; and a coupling mechanism that couples adjoining two of said extendable arms so that said adjoining two extendable arms can move together, in order to allow adjoining two sides of said polygonal frame to extend and contract together, wherein each of said extendable arms includes a plurality of cross units each formed by pivotally coupling two rigid members, which cross each other to form an X-shape, via a middle coupling shaft, and an end coupling portion that pivotally couples ends of adjoining ones of said cross units.