Dual-Control Window Covering Clutch for Accurate Position Tracking
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Solution Overview
Problem
Existing architectural coverings face challenges in accurately tracking the position of the covering when switched between motorized and manual operation, leading to potential misalignment and increased power consumption due to unnecessary motor engagement.
Innovation Solution
The implementation of an engaging/disengaging clutch system that decouples the electric motor from the drive shaft when not in use, allowing for manual operation without motor assistance and using position tracking devices to accurately determine the covering's position, while also powering down electrical components to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the motor is continuously engaged to track covering position, then position tracking accuracy is maintained, but power consumption increases
Solution Approach 1:
The clutch mechanism dynamically engages and disengages the motor from the drive shaft based on operational mode. In manual mode, the clutch disengages the motor to eliminate power consumption while position tracking continues via the encoder on the drive shaft. In motorized mode, the clutch engages to enable motor-driven positioning. This dynamic switching resolves the contradiction by making the motor engagement conditional rather than continuous.
Solution Approach 2:
The system uses the drive shaft's own rotation (whether motor-driven or manually-driven) to drive the encoder and maintain position tracking without requiring continuous motor engagement. The encoder self-services the position tracking function by directly monitoring drive shaft position, eliminating the need for continuous motor power to maintain tracking accuracy.
2Reliability
If the motor remains engaged during manual operation, then positioning control is maintained, but torque interference occurs and operational life is reduced
Solution Approach 1:
The clutch provides dynamic engagement/disengagement of the motor based on operational mode. During manual operation, the clutch disengages the motor from the drive shaft, eliminating torque interference and mechanical stress on the motor. Positioning control is maintained through the encoder's ability to track drive shaft position independently. This dynamic switching resolves the contradiction by separating motor engagement from position tracking capability.
3Ease of operation
If the motor is disengaged during manual operation, then torque interference is eliminated, but position tracking accuracy may be compromised
Solution Approach 1:
The encoder acts as an intermediary between the drive shaft and the control system. It directly monitors the drive shaft's rotational position regardless of whether the rotation is motor-driven or manually-driven. This intermediary measurement system enables accurate position tracking while the motor remains disengaged during manual operation, resolving the contradiction by decoupling the measurement function from the motor engagement state.
4Loss of information
If electrical components remain powered to maintain position data, then real-time positioning is achieved, but energy is wasted during idle periods
Solution Approach 1:
The controller implements periodic action by entering a sleep mode during which electrical components are powered down to conserve energy. Upon detecting user interaction (such as manual operation initiation), the controller wakes up, re-engages the motor through the clutch, and resumes full operational mode. This periodic switching between sleep and active states resolves the contradiction by making power consumption conditional on actual operational need.
Data Source
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AI summary
A dual control architectural covering is disclosed. A dual control architectural covering includes a clutch to disengage a motor when the motor is not in use. The dual control architectural covering further includes a manual control to move the covering of the architectural opening while the motor is disengaged. The dual control architectural covering further includes a braking element to resist movement of a drive element of the covering when the motor is disengaged.