Compact Cord Winding Assembly for Multi-Rail Window Shades
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Solution Overview
Problem
Existing window shades with electric motors and cord winding units are not compact enough for complex constructions, such as those with two adjustable rails, making them unsuitable for certain applications.
Innovation Solution
A compact cord winding assembly with a housing, spool portions, and a transmission axle that allows concurrent rotation of suspension cords for winding and unwinding, integrated with an electric motor unit to drive the axle, suitable for window shades with multiple rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional electric motor and cord winding units are used in window shades, then the window shade can be raised and lowered conveniently, but the structure becomes too large and not compact enough for complex constructions with multiple adjustable rails
Solution Approach 1:
The patent combines multiple cord winding units into a single integrated housing. The housing contains multiple spool portions (first spool portion, second spool portion) that share common structural elements and mounting mechanisms, merging what would traditionally be separate units into one compact assembly that can accommodate multiple suspension cords for complex window shade constructions
Solution Approach 2:
The integrated housing is designed to perform multiple functions simultaneously - it houses multiple spool portions for different suspension cords, provides mounting for all spools, and enables control of multiple rails through a single structural unit. This multi-functional design allows the same housing structure to support complex window shade constructions with multiple adjustable rails
Data Source
AI summary
A cord winding assembly for a window shade includes a housing, a first and a second spool portion respectively connected with a first and a second suspension cord, and a transmission axle. The first and second spool portions are disposed in a cavity of the housing. The transmission axle is rotationally coupled to the first and second spool portions and extends outside the housing at least at one end thereof, the transmission axle and the first and second spool portions being rotatable concurrently relative to the housing in a first direction for respectively winding the first and second suspension cords around the first and second spool portions, and in a second direction opposite to the first direction for respectively unwinding the first and second suspension cords from the first and second spool portions.