Patent ID: 6146234
Filing Date: 2000-11-14
Classification: A63H

Abstract:
An ascending/descending mechanism comprising:a base board with a power source and a pair of inner supports and a pair of outer supports mounted thereon;said power source with a power output shaft;a supporting structure including said pair of inner supports and said pair of outer supports mounted on said base board, said inner and said outer supports are symmetrically arranged on two sides of said power output shaft of said power source, said inner and said outer supports are each formed with a shaft hole, top sections of each of said outer supports are disposed with bosses, said bosses are received in corresponding insertion holes of two retaining blocks, such that each of said two retaining blocks are fixed at a top end of a corresponding one of said outer supports; anda transmission structure including a face gear with a central hole that receives said power output shaft of said power source, long shafts of each of two eccentric shafts pass through said shaft holes of a corresponding one of said inner and a corresponding one of said outer supports and each said eccentric shaft is supported between a pair of said inner and outer supports, ends of said long shafts of each of said eccentric shafts include fitting shafts fitted with a cylindrical gear that meshes with said face gear, short shafts of each of said eccentric shafts are inserted into corresponding slide slots of two driven slide blocks, a column is passed through a fitting hole of each of said retaining blocks and is secured to a rod formed on each of said driven slide blocks.