Roller Tube Motor Assembly With Splined End-Cap Torque Lock
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Solution Overview
Problem
Existing motor assemblies for architectural coverings face issues with torsion load resistance, electrostatic discharge, and light leakage due to inadequate connections and component placement, leading to detachment, damage, and reduced efficiency.
Innovation Solution
A motor assembly with a splined engagement system that securely attaches to an end cap, incorporating a compact design to insulate electrical components and reduce light leakage by housing all components within a roller tube, ensuring robust torque resistance and electrostatic protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the motor assembly uses a simple connection to the stationary structure, then the device complexity is reduced, but the torsion load resistance deteriorates causing detachment during operation
Solution Approach 1:
The connection structure is segmented into multiple independent attachment points distributed around the circumference of the motor assembly. Each attachment point includes its own fastening mechanism, allowing the structure to handle torsion loads through distributed forces rather than concentrating stress at a single connection point.
Solution Approach 2:
Multiple attachment points and fastening mechanisms are merged into an integrated connection system that works collectively to resist torsion loads. The combination of multiple attachment points creates a unified structural solution that provides both strength and stability while maintaining reasonable device complexity.
2Device complexity
If electrical components are positioned external to the roller tube, then the device complexity is reduced, but light leakage increases around the edges of the covering
Solution Approach 1:
Electrical components are nested within the roller tube structure, with components arranged in a compact configuration that fits inside the tubular space. The roller tube itself serves as a housing for these components, eliminating the need for external positioning and preventing light leakage at the edges.
Solution Approach 2:
The arrangement of electrical components transitions from an external two-dimensional layout to an internal three-dimensional configuration within the roller tube. This dimensional change allows components to be positioned in available internal space while maintaining compactness and eliminating light gaps.
3Device complexity
If the connection of the drive structure to the drive shaft is simple, then the device complexity is reduced, but the torque transmission accuracy deteriorates causing slippage
Solution Approach 1:
The simple mechanical connection is replaced with a splined interface system that uses interlocking geometric features rather than relying solely on friction or simple fastening. This mechanical substitution provides positive engagement that prevents slippage while maintaining reasonable complexity through standardized spline geometries.
Data Source
AI summary
An architectural covering including a motor assembly is provided. The covering may include a head rail, an end cap enclosing an end of the head rail, a roller tube rotatably supported within the head rail at least partially by the end cap, and a motor assembly including a housing in splined engagement with the end cap to non-rotatably secure the motor assembly to the end cap. The motor assembly may be received at least partially within the roller tube and may be in driving engagement with the roller tube. A covering material may be attached to the roller tube such that rotation of the roller tube extends or retracts the covering material.