Roller Shade Slip Plate for Overload and Chain Breakage Control
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Solution Overview
Problem
Roller shade systems face issues with damage due to excessive force, chain breakage from momentum, and uncontrolled unrolling in multi-banded systems, as well as alignment challenges and inadequate adjustment mechanisms.
Innovation Solution
Incorporating 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 preventing unrolling, and an adjustment arm with tactile feedback for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional drive mechanism with clutch and sprocket is used, 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 slip plate is designed with protrusions that engage with slots in the drive mechanism beforehand, creating a controlled disengagement path. When excessive force is applied, the protrusions automatically disengage from the slots, allowing the shade to lower safely without damaging the chain or other components. This preventive mechanism cushions against momentum-induced damage before it occurs.
Solution Approach 2:
The slip plate acts as an intermediary component between the drive mechanism and the shade tube. It mediates the force transmission by providing a controlled disengagement interface through its protrusions and slots, protecting the main drive components from direct exposure to excessive forces while maintaining normal operational functionality.
2Area of stationary object
If a multi-banded shade system is used, then coverage area is increased, but uncontrolled unrolling occurs when clutch systems are removed
Solution Approach 1:
The multi-banded shade system is segmented into multiple independent shade bands, each with its own drive mechanism and slip plate assembly. This segmentation allows each band to be controlled independently, preventing uncontrolled unrolling of entire systems when individual clutch systems are removed or fail. Each segment maintains its own safety controls.
Solution Approach 2:
The slip plate serves as an intermediary control element for each shade band, providing a mechanical interface that prevents uncontrolled rotation. The protrusions on the slip plate engage with slots to control the rotation of each band independently, ensuring that even when clutch systems are removed, the shade bands cannot unroll uncontrollably.
3Manufacturing precision
If precise alignment mechanisms are added to multi-banded systems, then alignment accuracy is improved, but device complexity increases
Solution Approach 1:
The adjustment arm incorporates tactile feedback features that allow users to self-adjust the alignment of shade bands without requiring complex measurement tools or procedures. The tactile feedback provides intuitive guidance for achieving proper alignment, enabling users to perform precise adjustments themselves without additional complex mechanisms.
Solution Approach 2:
The adjustment arm includes tactile feedback elements that provide sensory information to the user during the alignment process. This feedback mechanism guides the user in achieving proper alignment by providing detectable cues when the correct position is reached, improving alignment accuracy without requiring complex electronic or mechanical measurement systems.
Data Source
AI summary
The 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. 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.