| 摘要 |
A mechanical stand for vertically supporting objects is disclosed which includes an upper base section comprised of a tubular structure, having a telescopically movable upper support member, which in the preferred embodiment of the invention could be used as a rack member or a shelf structure. The upper support member is comprised of a tubular member cooperatively profile with the tubular structure of the upper base section to be slidably received therein. The upper support member includes a pushbutton actuator which is operatively connected to a linkage member, which in turn is connected to a locking jaw, whereby actuation of the pushbutton member disengages the locking jaw from the inner surface of the upper base member, allowing various incremental telescopic locations of the upper support member.
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