Retractable Zipper Pull Assembly for Universal Garment Access
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Solution Overview
Problem
Zippers, especially those at the rear of clothing, are difficult to use due to their design and become increasingly challenging with age, particularly for individuals with ailments like arthritis, and existing assistive devices are not universally compatible or versatile.
Innovation Solution
A device comprising a retractor body with a clasp and a retractable string or wire, featuring a brake system and teeth-engaged jaws to securely grasp zipper pull tabs, allowing for adjustable length and easy operation, along with a decorative cap for customization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a static length string or wire is used in existing assistive devices, then the device structure is simple, but the versatility and adaptability are limited
Solution Approach 1:
The patent applies the dynamics principle by replacing the static string or wire with a retractable wire that can extend and retract. The wire is stored on a spool that can rotate to pay out or retract the wire as needed. This dynamic mechanism allows the device to adapt to different zipper lengths and positions, significantly improving versatility while maintaining reasonable device complexity through the use of a simple spool and spring system.
Solution Approach 2:
The patent applies parameter changes by making the wire length variable rather than fixed. The retractable wire mechanism allows the effective length to be adjusted dynamically based on the specific zipper being used. This parameter change enables the device to work with various zipper sizes and positions, enhancing adaptability without requiring multiple different devices.
2Ease of operation
If hooks and attachment devices are added to assist zipper use, then ease of operation improves, but compatibility with all zipper types decreases
Solution Approach 1:
The patent applies universality by designing a clasp mechanism with jaws that can universally grasp various zipper pull tabs regardless of their specific shape or size. The jaws are shaped to accommodate different zipper types, and the retractable wire provides consistent pulling force. This universal design allows the device to work with all common zipper types while maintaining ease of operation, resolving the trade-off between specialization and versatility.
3Adaptability or versatility
If the wire is made retractable with a spool and spring, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent applies self-service through the spring-loaded retraction mechanism. The spring automatically reels the wire back into the spool when release force is applied, eliminating the need for manual winding or complex retraction mechanisms. This self-service feature provides adaptability through automatic wire management while keeping the device complexity low by using a simple elastic spring system rather than motors or complex mechanical retraction devices.
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 provides a simple, effective, and adaptable means to assist in zipping and unzipping clothing, enhancing usability for all ages and zipper types, including those with arthritis, while allowing for aesthetic coordination with various outfits.
Implementation Method 1
A spring is also in the retractor body and applies a bias to the spool to maintain the wire within the retractor body in a retracted state.
Implementation Method 2
To apply the brake, a user depresses the brake pad, which in turn acts upon the brake lever. When acted upon, the brake lever interacts with the spool to prevent rotational motion and maintain the wire at a desired length.
Data Source
AI summary
A device to assist with the working of a zipper is described herein. The device includes a retractor body and a retractable clasp connected to the retractor body with a flexible member. The retractor body has a brake system in order to maintain a desired length of a flexible member. A removable decorative cap is also applied to the retractor body.