Roller Shade Spring Tension and Brake Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing roller shade systems lack efficient mechanisms for selectively adjusting the position of the covering relative to architectural openings, particularly in terms of counterbalancing forces and braking systems, which can lead to instability and unintended movement.
Innovation Solution
The roller shade assembly incorporates a spring tension assembly with counterbalancing forces applied in parallel or series, and a brake assembly with adjustable braking force, utilizing a timing ring and idler assembly to manage the roller tube's rotation and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a roller shade system uses a simple mounting mechanism without counterbalancing forces, then the device complexity is reduced, but the stability and positioning precision of the covering deteriorates
Solution Approach 1:
The patent applies counterbalancing forces through spring tension assemblies that provide upward force to offset the weight of the roller tube and covering. This allows the roller shade to maintain stable positioning at any height without requiring complex motorized systems, as the springs continuously apply counterbalancing force to prevent the covering from dropping or moving unintentionally.
Solution Approach 2:
The patent uses adjustable braking mechanisms that can dynamically engage and disengage to control the roller tube's rotation. The brake assembly allows the system to transition between free movement (during adjustment) and locked position (when holding), providing controlled dynamics that enhance positioning precision without permanently complicating the mounting structure.
2Measurement precision
If a roller shade system incorporates adjustable braking force mechanisms, then the positioning precision is improved, but the device complexity increases
Solution Approach 1:
The brake assembly is pre-configured with adjustable braking force capabilities that are set during installation or initial setup. This preliminary configuration allows the system to achieve precise positioning without requiring complex real-time adjustment mechanisms during operation, as the braking force is predetermined and optimized for the specific application.
3Stability of the object's composition
If counterbalancing forces are applied in parallel configuration, then the stability and load capacity are improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent combines multiple spring tension assemblies into an integrated unit that operates as a cohesive system. By merging the springs, housings, and mounting structures into a unified assembly, the system achieves the stability benefits of parallel counterbalancing forces while minimizing the increase in device complexity and space requirements that would result from completely separate assemblies.
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
The system provides stable and controlled adjustment of the roller shade, ensuring precise positioning and preventing unintended movement by balancing forces and applying adjustable braking, enhancing user control and operational reliability.
Implementation Method 1
a biasing member configured to apply a biasing force onto the plunger
Implementation Method 2
a spring member connected at one end to the housing and at an opposite end to the shaft
Implementation Method 3
a brake assembly with adjustable braking force
Data Source
AI summary
A roller shade assembly includes a roller tube, a first spring assembly and a second spring assembly received by the roller tube, the first spring assembly including a first shaft received by a first housing, a first spring member connected at one end to the first housing and at an opposite end to the first shaft, the second spring assembly including a second shaft received by a second housing, a second spring member connected at one end to the second housing and at an opposite end to the second shaft, and a connection assembly including a connector defining a shaft and a locking member, the first shaft is configured to engage the shaft defined by the connector, and the second housing is configured to engage the locking member defined by the connector to connect the first spring assembly and the second spring assembly in series.