Adjustable Headrail Bracket With Resilient Slot Clamping
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Solution Overview
Problem
Existing adjustable bracket assemblies for mounting blind head rails require loosening fasteners for adjustment, which is inconvenient and can lead to insecure engagement, especially for ceiling-mounted brackets where the weight of the blind may cause the head rail to slide due to single-sided latching mechanisms.
Innovation Solution
A bracket assembly with a stationary base member and a head rail holder that uses a stemmed fastener and an expandable, resilient clamping means with actuating means for linear movement, allowing for secure adjustment of the head rail position without loosening fasteners, featuring a torsion spring or X-shaped resilient body for engagement with the slot's inner surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fastener such as a screw is used to adjust the distance between the mounted blind and the wall or ceiling, then the bracket can be adjusted, but the fastener cannot be reached without dismounting the blind from the bracket
Solution Approach 1:
The bracket is divided into a stationary base member and a movable head rail holder that can be independently adjusted along the support leg. The head rail holder is separated from the base member, allowing adjustment without removing the entire assembly.
Solution Approach 2:
A stemmed fastener acts as an intermediary element that passes through the elongated slot in the support leg, connecting the head rail holder to the base member. This intermediary allows linear adjustment along the slot while maintaining secure engagement.
2Adaptability or versatility
If a latch arm with nose is used for clamping, then the slide body can be engaged to the bracket body in different positions, but the latch arm must extend sideways from the slide body requiring handling space
Solution Approach 1:
Instead of a latch arm extending sideways from the slide body, the clamping means is integrated into the support leg structure itself. The elongated slot with engagement surfaces at its ends provides clamping in the opposite direction (along the length of the slot rather than perpendicular to it), eliminating the need for sideways extension.
Solution Approach 2:
The clamping mechanism transitions from a sideways-latching approach to a longitudinal clamping approach along the support leg. The engagement surfaces are positioned at the ends of the elongated slot, providing clamping force in the dimension of the slot's length rather than its width.
3Device complexity
If a single sided latching mechanism is used, then the bracket structure is simplified, but the head rail can slide under its own weight through the engagement
Solution Approach 1:
The elongated slot is designed with asymmetric engagement surfaces positioned at its opposite ends. These surfaces are configured to engage with corresponding features on the head rail holder, creating an asymmetric clamping arrangement that prevents movement in both directions along the slot.
Solution Approach 2:
The clamping means is pre-configured with engagement surfaces that automatically engage with the head rail holder when it is positioned along the support leg. The resilient nature of the clamping means ensures preliminary engagement before any movement occurs, preventing the head rail from sliding under its own weight.
4Ease of operation
If a lever and cam member latching means is used, then the bracket can be adjusted without unscrewing fasteners, but a very small lever must be handled in a small space requiring handling space over the bracket
Solution Approach 1:
The complex lever and cam member latching mechanism is extracted and replaced with a simpler linear adjustment system. The stemmed fastener moving through the elongated slot provides adjustment functionality without requiring the intricate lever-cam mechanism, eliminating the need for handling space over the bracket.
Solution Approach 2:
The stemmed fastener system is designed to be self-servicing, where the fastener itself moves linearly through the slot to provide both adjustment and clamping functions. This eliminates the need for separate actuating levers or cams, allowing adjustment through direct linear movement that requires minimal handling space.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables secure, linear adjustment of the head rail position without requiring fastener loosening, ensuring the head rail remains in place against its own weight, even when mounted vertically, by using a resilient clamping mechanism that engages and disengages with the slot's inner surfaces through a linear actuating mechanism.
Implementation Method 1
an expandable, resilient clamping means with actuating means for linear movement, allowing for secure adjustment of the head rail position without loosening fasteners, featuring a torsion spring or X-shaped resilient body for engagement with the slot's inner surfaces
Implementation Method 2
a bracket assembly with a stationary base member and a head rail holder that uses a stemmed fastener and an expandable, resilient clamping means with actuating means for linear movement
Data Source
AI summary
An adjustable bracket for mounting the headrail for a covering for architectural openings includes a stationary base member mountable on a wall or ceiling surface having a slot formed therein and a headrail holder connectable to the headrail and adjustably movable and operably connected within the elongated slot between fixed positions.