Patent ID: 6220683
Filing Date: 2001-04-24
Classification: A47B

Abstract:
A sliding track assembly comprising:an outer rail fixedly fastened to an inside wall of a first device;an intermediate rail moved in and out of said outer rail;an inner rail fixedly fastened to a second device and moved with said second device in and out of said intermediate rail;a locating plate fixedly fastened to said inner rail;a first sliding bearing coupled between said outer rail and said intermediate rail;a second sliding bearing coupled between said intermediate rail and said inner rail; and a stop member installed in a front end of said intermediate rail, said stop member comprising a protruding block for engagement with said locating plate to limit forward movement of said inner rail in said intermediate rail, two upright side blocks, which stop said second sliding bearing from being moved out of said intermediate rail, two rear retaining frames bilaterally disposed at a rear side thereof and adapted to hold down said second sliding bearing when disconnecting said inner rail with said second device from said intermedaite rail, preventing said second sliding bearing from being pushed backwards or damaged when inserting said inner rail into said second sliding bearing into said intermediate rail to reload said second device, said rear retaining frames having a respective sloping guide edge adapted to act with respective front positioning portions of a bottom wall of said second sliding bearing, for enabling said second sliding bearing to be moved into engagment with said rear retaining frames when disconnecting said inner rail with said second device from said intermediate rail;wherein said second sliding bearing comprises two upright side walls and two recessed portions respectively formed on the upright side walls of said second sliding bearing; said rear retaining frames each comprise an upright retaining wall respectively backwardly extended from the upright side blocks of said stop member and adapted for engagement with the two opposite side walls of said second sliding bearing, said upright retaining walls of said rear retaining frames of said stop member each having a raised portion adapted for engagement with the recessed portions on the side walls of said second sliding bearing, the upright retaining walls of said rear retaining frames of said stop member being respectively spaced from two upright side walls of said by a gap, which enables the upright retaining walls of said rear retaining frames of said stop member to be respectively forced outwards to minimize friction resistance during loading of said inner rail with said second device on said intermediate rail, the upright retaining walls of said rear retaining frames of said stop member each having a beveled guide edge adapted for guiding the side walls of said second sliding bearing in and out of the rear retaining frames of said stop member.