Blind Bead Chain Locking Wheel With Spring-Release Knob
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Solution Overview
Problem
Existing bead chain pull cords in blinds are not securely fixed, leading to swinging, noise, and potential safety hazards, especially for children, and existing fixing devices allow the bead chain to be rotated, reducing the blind's service life.
Innovation Solution
A bead chain holding device with a holder, bead chain wheel, and knob that uses a spring presser and lock mechanism to securely lock and unlock the bead chain wheel, preventing pulling and enhancing safety by engaging and disengaging lock portions with the knob's rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fixing device is attached to fix the bead chain pull cord, then the bead chain can be prevented from swinging and making noises, but the bead chain can still be rotated or pulled off by children, reducing the blind's service life
Solution Approach 1:
The fixing device is divided into multiple functional components: a holder for mounting, a bead chain wheel for cord winding, a spring presser for providing locking force, and a knob for operation. Each component performs a specific function, collectively achieving both noise prevention and secure locking to extend service life.
Solution Approach 2:
The spring presser provides dynamic locking force that automatically engages and disengages the lock portion based on the state of the bead chain wheel. When the wheel is in position, the spring maintains engagement to prevent rotation and noise; when the knob is operated, the spring allows disengagement for controlled movement.
2Reliability
If the bead chain pull cord is securely locked to prevent pulling, then safety is improved, but the ease of operation for controlling the blind is reduced
Solution Approach 1:
The knob acts as an intermediary between the user and the locking mechanism. By rotating the knob, the user indirectly controls the engagement and disengagement of the lock portion through the protruding body and engage portion interaction, making the secure locking system easy to operate.
Solution Approach 2:
The spring presser automatically provides the locking force without requiring continuous user intervention. Once the knob is rotated to engage the lock, the spring maintains the locked state autonomously, ensuring safety while minimizing operational effort from the user.
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 locks the bead chain, reducing child interaction and extending the blind's service life by preventing unwanted pulling and enhancing safety.
Implementation Method 1
the bead chain wheel comprises a spring presser at a side and a second lock portion at the other side
Data Source
AI summary
A bead chain holding device, comprising a holder, a bead chain wheel and a knob. The holder comprises a space inside the holder, the space is provided for the bead chain wheel corresponding to a movement of a bead chain, a first side of the holder is connected to a protruding frame, and a second side of the holder comprises a hollow portion, a first lock portion, and an engage portion protruding toward the knob. The bead chain wheel comprises a spring presser at a side of the wheel body and a second lock portion at the other side of the wheel body. The knob comprises a protruding body; by pressing and rotating the knob to compress the spring presser to disengage the second lock portion from the first lock portion but engage the protruding body with the engage portion to unlock the bead chain wheel.