Cordless Blind Limiting Mechanism for Safe Shade Positioning
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Solution Overview
Problem
Conventional blinds pose a safety risk due to exposed tractional cords that can be hazardous to children, as they can be accidentally strangled during play.
Innovation Solution
A cordless blind structure with a limiting mechanism that allows the shade to be lifted or lowered by applying force directly to the shade, eliminating the need for cords and enhancing user safety through a resilient unit and axial unit mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional blinds with tractional cords are used, then the shade can be easily lifted or lowered, but child safety is compromised due to strangulation risk
Solution Approach 1:
The patent removes the dangerous tractional cords from the blind system entirely. The shade is operated by pulling the bottom edge of the shade itself rather than using separate cords, thereby extracting the harmful element while preserving the lifting function
Solution Approach 2:
The patent introduces an intermediary mechanism consisting of the weight member and limiting mechanism that mediates between user input and shade movement. The weight member translates pulling force on the shade into controlled lifting motion, while the limiting mechanism prevents over-travel, replacing the direct cord connection with a safer intermediary system
2Object-affected harmful factors
If cords are removed from the blind structure, then child safety is improved, but the mechanism for lifting and positioning the shade becomes more complex
Solution Approach 1:
The patent merges the lifting mechanism and positioning control into a single integrated system. The weight member combines the functions of force transmission and position control, while the limiting mechanism integrates both upper and lower travel limits in one assembly, reducing overall system complexity despite removing cords
Solution Approach 2:
The limiting mechanism is designed to automatically control the shade's travel limits without requiring external intervention. The resilient unit provides automatic rebound force, and the axial units mechanically limit travel at both extremes, allowing the system to self-regulate its operation range
3Manufacturing precision
If a limiting mechanism is added to control shade position, then positioning accuracy is improved, but the device complexity increases
Solution Approach 1:
The resilient unit acts as a counterweight mechanism that balances the shade's weight and provides automatic rebound force. This mechanical counterbalance system achieves precise positioning control through force equilibrium rather than complex electronic or mechanical actuation systems
Solution Approach 2:
The limiting mechanism employs dynamic elements including the resilient unit that can flex and rebound, and axial units that allow controlled movement in one direction while limiting movement in the opposite direction. This dynamic design achieves precise positioning control through mechanical flexibility rather than rigid, complex structures
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 cordless blind structure ensures ease of use and significantly reduces the risk of child safety hazards by eliminating cords, allowing the shade to be controlled safely and efficiently without the need for tractional cords.
Implementation Method 1
a resilient unit (41), and an axial unit (42), the resilient unit being movably disposed at the second end holder (3)
Data Source
AI summary
The present invention relates to a cordless blind structure including a blind body further comprising a batten and a shade having an end disposed at an outer edge of the batten; a first end holder movably disposed at a first end of the batten; a second end holder movably disposed at a second end of the batten; and a limiting mechanism disposed between the blind body and the second end holder, the limiting mechanism including a resilient unit and an axial unit, the resilient unit being movably disposed at the second end holder, and the axial unit being movably disposed at the second end holder, controllably coupled to the resilient unit, and coupled to the second end of the batten. The shade is lifted or lowered by exerting a force thereon in conjunction with the limiting mechanism so as to ensure ease of use and enhance user safety.