Supports: cabinet structure – With movable components – Non-horizontally – non-pivotally movable
Reexamination Certificate
2000-07-17
2001-11-06
Chen, Jose V. (Department: 3636)
Supports: cabinet structure
With movable components
Non-horizontally, non-pivotally movable
C108S147000, C248S408000
Reexamination Certificate
active
06312069
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a height adjustable structure of a desk combination. Especially, the drawer cabinet of the desk combination can be used for adjusting the height of the table face to a proper position.
2. Description of the Related Art
A conventional desk combination in accordance with the prior art comprises a desk, and a drawer cabinet. The drawer cabinet can be received in the right side, the left side or the two sides of the desk, and can also be used individually so that the desk and the drawer cabinet co-operate with each other so as to form a diverse combination, thereby increasing the versatility of the desk combination. However, the drawer cabinet includes a table face which is usually fixed on the drawer cabinet so that the height of the table face of the drawer cabinet cannot be adjusted arbitrarily to fit users of different statures, thereby greatly limiting the versatility of the drawer cabinet.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a height adjustable structure of a desk combination comprising a drawer cabinet having two sides each provided with a fixed plate, a gear pivotally mounted on an upper portion of the fixed plate, a pivot arm pivotally mounted on a lower portion of the fixed plate, a torsion spring mounted on the pivot arm so that a mediate portion of the pivot arm is deflected leftward or rightward by an elastic action of the torsion spring, the lower portion of the fixed plate having two sides each provided with a track, a protective board mounted in an opening defined in the upper portion of the fixed plate, a movable plate slidably mounted on the protective board and having a lower portion defining an elongated successive multiple stepwise locking slot, a rack mounted on one side of the movable plate and meshing with the gear, a support frame secured on a top of the movable plate and engaged with a table face, wherein, when the height of the table face is adjusted, the rack of the movable plate is slidable on the gear of the fixed plate, at the same time, the pivot arm is moved along the elongated successive multiple stepwise locking slot to form a snap fixing state by a deflection positioning action of the pivot arm, and a lower portion of the locking slot of the movable plate having a catch body and a hollow portion across connected to two sides of the locking slot, thereby increasing a structural strength of the catch body and the hollow portion, and thereby efficiently preventing the catch body and the hollow portion from being deformed.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 2931685 (1960-04-01), Butler
patent: 3744872 (1973-11-01), Morelli
patent: 5549053 (1996-08-01), Grout
patent: 5598788 (1997-02-01), Jonker
patent: 6209840 (2001-04-01), Chen
Chen José V.
Fisher Michael J.
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