Wedgelock Earplug Push-Pin Mechanism for Secure Retention
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Solution Overview
Problem
Existing earplugs often fail to provide effective hearing protection due to poor fit, discomfort, and the risk of falling out, while also being prone to contamination from dirty fingers.
Innovation Solution
The wedgelock earplug system features a push-pin assembly with a middle ring and outer ring, made from polyurethane foam, which allows for incremental deformation of the ear cone for a customizable fit, reducing the likelihood of the earplugs falling out and providing effective soundproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pinch and roll earplugs are used, then manufacturing cost is low, but fit and comfort are poor causing them to fall out
Solution Approach 1:
The earplug incorporates a push-pin assembly that can move between extended and retracted positions, allowing the ear cone to be dynamically adjusted from a compressed insertion state to an expanded retained state. This dynamic mechanism enables the earplug to transition from a simple insertion form to a secure retained form, solving the retention problem without requiring complex permanent structures.
Solution Approach 2:
The earplug is divided into distinct functional segments: the ear cone, the push-pin assembly, and the retention mechanism. This segmentation allows each component to perform its specific function independently - the ear cone for insertion, the push-pin for deformation control, and the retention mechanism for securing - thereby achieving reliable retention through modular design rather than monolithic complexity.
2Object-affected harmful factors
If earplugs are made to fit tightly to reduce noise, then hearing protection effectiveness improves, but comfort decreases and they may fall out
Solution Approach 1:
The push-pin assembly enables dynamic control of the ear cone's expansion state. During insertion, the ear cone remains compressed for ease of insertion and comfort. Once in position, the push-pin is actuated to expand the ear cone to its retention shape, creating the tight seal for noise reduction. This dynamic transition allows the earplug to provide both comfort during insertion and effective noise blocking during wear.
3Adaptability or versatility
If earplugs are made adjustable for different ear canal sizes, then adaptability improves, but device complexity increases
Solution Approach 1:
The ear cone's key parameter is its outer diameter, which can be changed between a compressed state for insertion and an expanded state for retention. The push-pin assembly controls this parameter change by applying force to deform the ear cone material. This parameter-based adjustment allows the same earplug to adapt to different ear canal sizes through material deformation rather than requiring multiple sizes or complex adjustable components.
Solution Approach 2:
The ear cone is made from a flexible material that can be deformed by the push-pin assembly. This flexibility allows the ear cone to be compressed for insertion and then expanded to conform to the user's ear canal. The flexible shell property enables adaptability to different ear canal shapes and sizes without requiring complex adjustable mechanisms, as the material itself adapts through elastic deformation.
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 wedgelock earplug system effectively protects against hearing loss by providing a secure, comfortable fit that reduces ambient noise, while being easy to adjust and maintain, thus addressing the limitations of existing earplug designs.
Implementation Method 1
the push-pin assembly able to incrementally deform the ear cone for creating a user-preferred fit within an ear cavity
Implementation Method 2
taking up a gap, via manual manipulation, such that the wedgelock earplug assembly is friction-fit to the ear cavity
Data Source
AI summary
Wedgelock earplug system, designed to be worn and used to protect the user from hearing loss caused by loud environments. Further, the device can be used to effectively ‘soundproof’ the user-wearer from ambient noise so he/she can concentrate. The device preferably has a plastic push pin with a knob that features a middle ring and an outer ring which may be made from polyurethane foam.