Two-Actuator Wristband Locking Mechanism for Dementia Care
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Solution Overview
Problem
Individuals with dementia, such as Alzheimer's Disease, often wander and attempt to remove location-tracking devices due to cognitive impairment, making it difficult for caregivers to ensure continuous monitoring and safety, especially in group settings where timely location tracking is hindered by the ratio of caregivers to patients.
Innovation Solution
A wristband locking mechanism using two distinct spring-biased actuators requires two-handed operation to unlock, ensuring the device cannot be removed inadvertently or intentionally, incorporating a clasp assembly with lock arms and actuators that provide selective interference fits to secure the device to the wearer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wristbands or simple locking mechanisms are used, then the device can be easily removed by the wearer, but this allows individuals with dementia to inadvertently or intentionally remove the location-tracking device, rendering it ineffective
Solution Approach 1:
The locking mechanism is divided into multiple independent components: a first spring-biased actuator that releases a first lock arm, and a second spring-biased actuator that releases a second lock arm. Both actuators must be simultaneously operated to unlock the device, creating a segmented control system that prevents accidental removal while maintaining intentional accessibility
Solution Approach 2:
The spring-biased actuators are pre-loaded in the locked position, requiring deliberate user action to release. The mechanism is designed so that the locking action occurs automatically through spring force, while unlocking requires deliberate simultaneous operation of both actuators, reversing the conventional ease-of-removal approach
2Reliability
If a secure locking mechanism is implemented to prevent removal by individuals with dementia, then device retention is improved, but the mechanism becomes more complex with multiple actuators and lock arms
Solution Approach 1:
The mechanism merges two independent locking systems into a single integrated assembly where both lock arms must be simultaneously released. The housing, lock arms, and actuators are combined into a unified structure that provides secure retention without requiring separate locking devices
Solution Approach 2:
The spring-biased actuators provide automatic locking function without requiring additional power sources or complex control systems. The springs self-generate the locking force, eliminating the need for batteries, motors, or electronic controls while maintaining reliable device retention
3Ease of operation
If the wristband is designed to be easily removable for comfort, then ease of operation is improved, but individuals with cognitive impairment can remove it inadvertently, compromising safety monitoring
Solution Approach 1:
The mechanism incorporates preliminary anti-action by requiring simultaneous operation of two independently positioned actuators to enable removal. This pre-established barrier prevents inadvertent removal through single-handed or accidental contact while allowing intentional removal when both actuators are deliberately operated
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 mechanism effectively prevents unauthorized removal of the wearable electronic device, allowing continuous location tracking and data monitoring, enhancing caregiver efficiency and patient safety by ensuring the device remains secured until assistance is provided.
Implementation Method 1
The clasp assembly includes one or more lock arms, a first spring-biased actuator and a second spring-biased actuator. The first spring-biased actuator is coupled to the one or more lock arms to provide a first selective interference fit between the one or more lock arms and a portion of the housing assembly, while the second spring-biased actuator is coupled to the one or more lock arms to provide a second selective interference fit between the one or more lock arms and another portion of the housing assembly.
Data Source
AI summary
A wristband locking mechanism for a wearable electronic device, a wristband, a wearable electronic device and a method of securing an article to a person. The wristband locking mechanism includes a clasp assembly with independently-operable spring-biased actuators such that the wristband locking mechanism cannot be unlocked using one hand. The use of sensors, processors, communication equipment and associated components within the wearable electronic device allows a caregiver to monitor one or more of location, environmental, physiological and activity data of a wearer of the device, while the requirement for two-handed operation for unlocking of the wristband locking mechanism provides a deterrent against intentional or unintentional removal of the attached article or wearable electronic device by the wearer.