Hearing Aid Locking Mechanism for Childproof Battery Safety
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Solution Overview
Problem
Commercially available hearing aids require users to perform delicate manipulations to lock and unlock the battery compartment, which can be accidental and pose a risk, especially for children who may ingest the battery.
Innovation Solution
A locking mechanism is introduced that immovably locks the first functional unit (housing) with the second functional unit (battery compartment) using a rotatable screw, snap-locking resistance, and magnetic resistance, allowing the battery compartment to be securely locked without external manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is introduced to prevent accidental opening, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical locking systems with a magnetic field-based locking mechanism. The magnet embedded in the battery compartment interacts with a ferromagnetic material in the housing to provide automatic locking, eliminating the need for mechanical latches, springs, or cam mechanisms while achieving reliable prevention of accidental opening.
Solution Approach 2:
The patent changes the locking mechanism from mechanical to magnetic by utilizing magnetic field strength as the locking parameter. The magnetic attraction force between the magnet and ferromagnetic material provides sufficient holding force to prevent accidental opening, while the locking strength can be adjusted by changing magnet size, material properties, or distance between components.
2Object-affected harmful factors
If a locking mechanism is introduced to prevent child access, then safety is improved, but ease of operation deteriorates
Solution Approach 1:
The patent extracts the locking function from the battery compartment itself by embedding a magnet within it. This allows the locking mechanism to be integrated into the removable unit rather than requiring external locking components on the housing, simplifying the overall system while maintaining strong locking capability.
Solution Approach 2:
The patent introduces a ferromagnetic material as an intermediary between the magnet in the battery compartment and the housing. This intermediary enhances the magnetic coupling strength, providing reliable locking while allowing the battery compartment to be removed by applying sufficient force to overcome the magnetic attraction.
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 solution provides a reliable and childproof or tamperproof locking mechanism that prevents accidental or intentional detachment of the battery compartment, ensuring safe and secure operation of the hearing aid.
Implementation Method 1
magnetic resistance
Implementation Method 2
friction between the friction element and the moveable element
Implementation Method 3
applying a compression force to the friction element
Implementation Method 4
snap-locking resistance
Data Source
AI summary
According to an embodiment, a hearing aid is disclosed. The hearing aid includes a first functional unit and a second functional unit. The second functional unit is configured to removably couple with the first functional unit. The coupling provides at least a mechanical connection between the first functional unit and the second functional unit. The first functional unit includes a moveable element that is configured to move between a first position and a second position. In the first position, the moveable element is contained entirely within the first functional unit. In the second position, a part of the moveable element is configured to protrude out of the first functional unit. The second functional unit includes a recess configured to receive the part of the moveable element that protrudes out of the first functional unit such that the first functional unit and the second functional unit are immovably locked with respect to each other in response to the moveable element is received in the recess.