Ear Cup Sealing Ring Release Mechanism

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Solution Overview

Problem

The existing ear cup designs for hearing protectors face challenges in easily detaching the sealing ring for maintenance and hygiene, as the press fit requires substantial effort and risks damaging the electronics when tools are used, especially due to the small size of the ear cup.

Innovation Solution

A user-operable release mechanism is integrated within the outer casing of the ear cup assembly, allowing for the convenient detachment of the sealing ring using a lever arrangement, reducing the required force and minimizing the risk of damage to the electronics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a straightforward press fit is used to attach the sealing ring to the outer casing, then sufficient acoustical sealing is achieved, but substantial effort is required for detaching the sealing ring and risk of damaging electronics increases

Engineering Contradiction:

Improveacoustical sealingVSAvoiddetachment operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The attachment mechanism is segmented into two functional parts: a press fit interface for maintaining acoustical sealing and a release mechanism for enabling easy detachment. The release mechanism includes a lever arrangement with a first end accessible from outside the ear cup and a second end that interacts with the sealing ring, allowing the attachment function to be divided between sealing and detachment operations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The release mechanism acts as an intermediary tool that mediates between the user and the sealing ring attachment. By providing a lever arrangement that translates small external forces into larger internal forces, it enables easy detachment without requiring the user to apply substantial force directly to the sealing ring, thus preventing damage to electronics and the sealing ring itself.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the sealing ring is tightly attached to ensure proper sealing, then environmental noise leakage is prevented, but the force required for detachment increases and tool usage becomes necessary

Engineering Contradiction:

Improvesealing performanceVSAvoiddetachment force

Core Design Contradiction:

ReliabilityVSForce

Solution Approach 1:

The attachment system transitions from a static press fit to a dynamic system with a lever-based release mechanism. The lever arrangement allows the attachment state to be changed from locked (during normal use) to released (during maintenance) through a simple mechanical action, enabling the sealing ring to be securely attached during operation but easily detached when needed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The release mechanism serves as an intermediary that reduces the detachment force requirement by providing mechanical advantage through the lever arrangement. The first end of the lever is accessible from outside the ear cup while the second end interacts with the sealing ring, allowing users to apply small forces externally that are amplified into larger forces internally for effective detachment.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Volume of moving object

If the ear cup size is kept small for portability, then compactness is achieved, but the difficulty of detaching the sealing ring with fingers increases

Engineering Contradiction:

Improveear cup sizeVSAvoidsealing ring detachment

Core Design Contradiction:

Volume of moving objectVSEase of operation

Solution Approach 1:

The release mechanism extends the operational interface from the internal sealing area to the external surface of the ear cup. By providing a lever arrangement with its first end accessible from outside the ear cup, the detachment operation can be initiated from an external dimension, making it easier to operate with fingers despite the small size of the ear cup itself.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The release mechanism acts as an intermediary structure that bridges the gap between the small ear cup dimensions and the user's fingers. The lever arrangement with its extended first end provides a larger lever arm that is easier to grasp and manipulate, effectively translating the small internal sealing ring detachment problem into a larger external operation that is more suitable for finger operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 release mechanism enables easy and tool-free detachment of the sealing ring, enhancing user safety and maintenance convenience while maintaining acoustical sealing, thus improving hygiene and user comfort.

Implementation Method 1

a user operable release mechanism for loosening the sealing ring from the outer casing, said release mechanism arranged within the outer casing

Methodology Applied

Scientific EffectLever: Lever

Implementation Method 2

Methodology Applied

Scientific EffectMechanical Advantage: Mechanical Advantage

Data Source

PatentUS11571337B2Ear cup assembly for a hearing protector

Publication Date: 2023.02.07 SAVOX COMM OY AB

AI summary

According to an aspect of the present disclosure, an ear cup assembly for a hearing protector is provided. In accordance with an example, the ear cup assembly comprises an outer casing, a sealing ring detachably attached on the rim of the outer casing and suitable for sealingly abut against the head of a user around an ear of the user, and a user operable release mechanism for loosening the sealing ring from the outer casing, said release mechanism arranged within the outer casing.