| 摘要 |
The device effectively, efficiently, conveniently, and securely supports headrails of a type having a U-shaped cross section with first and second sidewalls joined by a connecting rear wall, the free ends of the sidewalls projecting inwardly to define first and second projections, respectively. The device comprises a selectively expandable and collapsible support having a top surface, a first side, a second side opposite the first side, a support surface on both the first and second sides, and may be fixed to a ceiling or wall. Structurally, the support comprises: a locking or latching mechanism for locking the support in an expanded condition in which the first and second projections at the free ends of the headrail sidewalls engage the support surfaces, and for releasing the expanded condition to place the support in a collapsed condition in which the spacing between the first and second support surfaces is insufficient to support both first and second projections at the free ends of the headrail sidewalls. If desired, the locking mechanism may provide three or more stable latched positions for accommodating different sized headrails.
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