Window Shade Cord Leveling Device with Spring-Loaded Pinch Mechanism
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Solution Overview
Problem
Existing window shade cord adjustment methods are time-consuming and prone to inaccuracies, especially for inexperienced users, and commercially available cord stoppers are too large and ineffective for finer window shade cords.
Innovation Solution
A compact adjustment device with a spherical body, button member, and spring mechanism that uses V-grooves and protrusions to securely retain window shade cords, allowing for easy alignment and retention, preventing slippage and inadvertent disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional tying methods are used to level window shades, then the shade can be leveled, but the process becomes time-consuming and frustrating
Solution Approach 1:
The cord stopper device enables the cord to self-adjust and self-lock at the desired position. The operator simply pulls the cord to the correct height and releases it; the spring-loaded button automatically pinches the cord to maintain that position, eliminating the need for complex tying procedures and achieving both speed and precision.
Solution Approach 2:
The cord stopper is pre-installed on the cord before final shade installation. This preliminary positioning allows the cord to be easily adjusted to the exact desired height during installation, and the stopper is already in place to immediately secure the position without requiring post-adjustment tying or knotting.
2Reliability
If standard cord stoppers are used on window shade cords, then cord stopping is achieved, but the stoppers are too large and do not adequately grasp fine window cords
Solution Approach 1:
The cord stopper features a localized gripping mechanism with a button that concentrates force on a small contact area of the cord. The spring-loaded button creates high localized pressure to securely pinch fine cords, while the overall stopper remains compact. This local quality enhancement allows reliable retention without increasing overall size.
3Volume of moving object
If cord stoppers are scaled down for fine window cords, then size is reduced, but the stoppers cannot adequately grasp the cords to prevent slippage
Solution Approach 1:
The spring mechanism is pre-loaded within the stopper body, storing mechanical energy ready for immediate action. When the button is pressed and released, the pre-compressed spring automatically propels the button forward to pinch the cord with sufficient force, ensuring reliable grip despite the compact size of the overall stopper.
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
Enables quick and accurate leveling of window shades by both professionals and homeowners, providing reliable cord retention without the need for cumbersome tying, addressing the inefficiencies of prior methods.
Implementation Method 1
a coil spring between the body and the bottom of the button member. When the button member is depressed against the spring, a hole through the body member and a hole through the button member are generally aligned
Data Source
AI summary
Window shade adjustment and leveling devices for controllably grasping a window shade cord for setting and leveling a window shade. The devices have a body with a button member extending into the body and having protrusions locking therein using a form of bayonet lock. Holes in the body and button member align when the button member is depressed relative to the body of insertion of the cord, with the cord being locked in position relative to the device when the button member is released. Preferably the holes in the body are specially configured to increase the gripping strength of the device, with the protrusions on the button member aiding in the gripping.