| 摘要 |
An improving structure of adjustable sliding device that can be stretched and shortened in its length, comprises a base, an upper frame, a middle frame and a sliding device. The base further comprises a flat horizontal unit and two side plates which are formed perpendicularly to the flat horizontal unit. One of side plates is a vertical plate formed perpendicularly on one side of the flat horizontal unit and another side plate is a L-shaped plate formed perpendicularly on another side of the flat horizontal unit. The sliding device comprises an upper unit and a bottom unit. A slot is formed at a middle part of the upper unit and the bottom unit, wherein a plurality of horizontal rotating units are located on the upper unit and the bottom unit so that the upper frame, the base and the middle frame can be correspondingly assembled together.
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