Roller Shade Control Device with Clutch and Brake Assembly
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Solution Overview
Problem
Conventional curtain systems have pulling strips or cords that are too long, posing a safety risk as children may wind them around their necks during play.
Innovation Solution
A roll-up control device for roller shades featuring a turntable assembly with a clutch and brake system, designed to manage the cord length and prevent accidental wrapping around the neck, by incorporating a turntable with a pull spring, outer turntable, shaft rod, and clutch, along with a brake assembly that allows controlled rolling up and down of the roller shade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a long pulling strip or cord is used to control the curtain, then the curtain can be easily pulled down and rolled up, but the cord becomes a safety hazard that children may wind around their necks
Solution Approach 1:
The patent extracts the harmful long cord from the system by implementing a cordless design. The control function is transferred to a push rod that interacts with a clutch mechanism, eliminating the need for a long pulling strip while maintaining ease of operation.
Solution Approach 2:
The patent introduces a clutch mechanism as an intermediary between the user's pushing action and the curtain's rolling motion. The clutch converts the linear motion of the push rod into rotational motion of the spool, providing a safe alternative to direct cord pulling.
2Object-affected harmful factors
If a cordless design with clutch mechanism is implemented, then safety hazards are eliminated, but the device complexity increases due to additional components
Solution Approach 1:
The patent merges multiple functions into integrated components. The clutch assembly combines friction elements, springs, and cam surfaces into a single compact unit that provides both control and safety functions. The spool integrates cord winding with the clutch actuation mechanism.
Solution Approach 2:
The patent employs dynamic elements such as springs and friction surfaces that automatically adjust to operational conditions. The spring-loaded clutch mechanism dynamically responds to user input, providing smooth control without requiring complex electronic systems.
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 device effectively manages cord length, preventing accidental neck entanglement and ensuring safe operation by allowing controlled rolling of the roller shade, thus enhancing user safety and reducing the risk of injury.
Implementation Method 1
a pull spring inserted into a side of the turntable
Implementation Method 2
a brake spring sleeved on a side of the brake shaft cover, a compression spring expanded and compressed in the brake shaft cover
Data Source
AI summary
A roll-up control device for a roller shade, comprising a turntable assembly comprising a turntable, a pull spring, an outer turntable, a shaft and a clutch; and a brake assembly comprising a brake shaft cover fastening the shaft rod, a brake spring sleeved on a side of the brake shaft cover, a compression spring expanded and compressed inside the brake shaft cover, a brake sleeve sleeved the side of the brake shaft cover and a shaft housing accommodating a damping ring and clamping the brake sleeve.