Roller Shade Adjustment Mechanism for Slip Protection and Leveling
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Solution Overview
Problem
Roller shade systems face issues such as damage from excessive force, chain breakage due to momentum, and uncontrolled unrolling in multi-banded systems, along with alignment challenges and inadequate adjustment mechanisms.
Innovation Solution
The system incorporates a slip plate with protrusions for controlled rotation, tube adapters for torque absorption, a center drive mechanism for obstacle-free access, a slide lock for maintaining shade band alignment, and an adjustment arm with a cam-type pivot system for leveling and indexing, along with a hembar adjustment mechanism for vertical alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional clutch system is used in roller shade mechanisms, then the shade can be raised and lowered, but the system is vulnerable to damage from excessive force and chain breakage due to momentum
Solution Approach 1:
The patent applies beforehand cushioning by incorporating a slip plate mechanism that allows controlled slippage when excessive force is applied. The slip plate has protrusions that engage with slots in the clutch housing, but are designed to disengage under excessive load, allowing the clutch to slip forward and absorb the shock before re-engaging. This prevents damage to the chain and other components by cushioning the impact in advance through controlled slippage.
2Ease of operation
If the clutch is removed in a multi-banded shade system, then ease of band removal is improved, but uncontrolled unrolling occurs
Solution Approach 1:
The patent applies preliminary action by incorporating a lock mechanism that is预先 configured to restrict shade band rotation. The lock includes a slide lock with openings that can be positioned to either allow or restrict rotation of the shade band. When the clutch is removed for band replacement, the lock prevents uncontrolled unrolling by maintaining engagement with the shade band, ensuring stability during the removal process.
3Manufacturing precision
If standard adjustment mechanisms are used, then device complexity is minimized, but alignment precision and adjustment capability are inadequate
Solution Approach 1:
The patent applies dynamics by incorporating an adjustment arm with a cam-type pivot system that provides dynamic adjustment capability. The adjustment arm includes a cam pivot that allows for precise leveling and indexing adjustments of the shade mechanism. The cam-type pivot enables fine-tuned positional adjustments while maintaining stability once set, achieving high alignment precision through a relatively simple mechanical design.
Data Source
AI summary
An improved roller shade system provides increased support, additional adjustments and/or increased safety. The slip plate allows the brake to slip forward and minimize damage to the clutch spring when a user pulls too hard on the hembar. The center drive mechanism extends through a bracket to allow the drive shaft to distribute power in both directions and drive two shade tube simultaneously. The tube adapter absorbs force from the spinning shade tube to minimize damage to the other components and the bead chain. The sprocket has a back wall supporting the sprocket, allowing the sprocket 130 to rest on the back flange of the sun gear to minimize pressure on the gears. An adjustment arm is adjusted to help level the shade band. The shade bands may be removed without disturbing the other shade bands in the system. A height of a hembar may be adjusted by rotating a rod within the hembar.