Window Shade Cord Retarding Device Friction Mechanism
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Solution Overview
Problem
Existing window shade cord retarders lack durability and effective friction mechanisms to ensure smooth operation and longevity.
Innovation Solution
A retarding device comprising a support frame and a retarding unit with a cord retarding module, featuring a rotatable retarding shaft and a rod member, which provides a durable configuration by using metal components for resistance to wear and heat dissipation, ensuring smooth operation and extended service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing cord retarders are used, then the window shade can operate, but the retarding device lacks durability and resistance to wear
Solution Approach 1:
The patent employs metal components (retarding shaft, rod member, mounting seat) constructed from durable materials resistant to wear and deformation. The retarding shaft and rod member are specifically designed as metal elements that provide long-lasting friction resistance without deforming under repeated cord movement, directly addressing the durability and service life contradiction.
2Ease of operation
If existing cord retarders are used, then the window shade can operate, but the friction mechanism is ineffective and causes cord jamming
Solution Approach 1:
The retarding shaft is designed with a cylindrical shape that allows the cord to wrap around it smoothly. The curved surface of the retarding shaft and rod member creates effective friction contact points that retard cord movement without causing jamming, enabling smooth operation while maintaining reliable friction control.
Solution Approach 2:
The retarding shaft and rod member are designed to rotate freely as the cord moves through them. This dynamic rotation maintains consistent friction contact between the cord and retarding surfaces, preventing cord jamming while ensuring reliable friction control throughout the operation cycle.
3Strength
If existing cord retarders are used, then the window shade can operate, but the components are prone to deformation under friction and heat
Solution Approach 1:
The metal construction of the retarding shaft, rod member, and mounting seat provides high strength and resistance to deformation under friction-induced heat. Metal materials effectively conduct and dissipate heat generated during cord operation, preventing component deformation while maintaining structural strength.
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 retarding device provides a durable and effective friction mechanism that ensures proper operation of window shades by preventing cord jamming and deformation, thereby extending the service life and maintaining smooth operation.
Implementation Method 1
The retarding device provides a friction force to retard movement of the pull cord
Data Source
AI summary
A retarding device is used to retard movement of a cord of a window shade. The retarding device includes a support frame and a retarding unit. The support frame includes a base part having a base slot formed therethrough, and a side plate disposed at one side of the base part and having a securing portion formed therethrough. The retarding unit includes a cord retarding module, and a rod member disposed at the base slot. The cord retarding module has a mounting seat secured to the securing portion, and a retarding shaft rotatably supported on the mounting seat. The rod member and the retarding shaft are parallel to each other and extend in a longitudinal direction.