Knife Holder with NFC Lock to Prevent Unauthorized Child Access
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Solution Overview
Problem
Children are vulnerable to injury from accessible knives left unattended in households due to their sharp edges, and existing solutions do not effectively prevent unauthorized access.
Innovation Solution
A knife holder with a lockable casing and near field communication (NFC) system that allows authorized users to unlock the casing using a wearable device, ensuring only authorized individuals can remove the knife.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a knife is left accessible in a household, then ease of access for authorized users is improved, but safety risk from unauthorized access by children increases
Solution Approach 1:
The knife storage system is segmented into multiple components: an outer holder, an inner casing, and a locking mechanism. The knife is separated from direct access by being placed inside the casing, which itself is placed inside the holder. This segmentation creates physical barriers that prevent unauthorized access while maintaining organized storage.
Solution Approach 2:
The locking mechanism acts as an intermediary between the user and the knife. It mediates access control by requiring authentication (via switch actuation and NFC verification) before allowing the casing to be removed from the holder. This intermediary layer blocks unauthorized access while permitting authorized users to access the knife conveniently.
2Object-affected harmful factors
If a lockable casing with NFC system is implemented, then safety against unauthorized access is improved, but device complexity increases
Solution Approach 1:
The NFC device serves multiple functions: it authenticates user identity, triggers the unlocking sequence, and communicates with the control system. The switch also serves dual purposes as both a mechanical actuator and part of the authentication circuit. This multi-functionality reduces the need for separate dedicated components, thereby managing complexity.
Solution Approach 2:
The system employs a nested structure where the casing is placed inside the holder, and the locking mechanism is integrated within the holder structure. The NFC antenna and electronic components are nested within the casing assembly. This nesting consolidates multiple functions into compact, integrated units, reducing overall system complexity despite the advanced functionality.
3Object-affected harmful factors
If a switch and NFC device are integrated for unlocking, then authorization control is improved, but ease of operation deteriorates
Solution Approach 1:
The system performs preliminary authentication actions automatically. When the switch is actuated, the NFC device immediately verifies the user's authorization without requiring manual intervention. The actuator is pre-positioned to engage with the switch, and the locking mechanism is ready to disengage upon successful authentication. This preliminary automation of verification steps maintains ease of operation while ensuring strict authorization control.
Solution Approach 2:
The NFC system provides self-service authentication by automatically verifying user identity and triggering the appropriate unlocking sequence without requiring manual input beyond the initial switch actuation. The system serves itself by managing the authentication protocol, signal verification, and actuator control autonomously, reducing the operational burden on the user while maintaining security.
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
Prevents unauthorized access and use of knives by children, enhancing safety by ensuring only authorized users can unlock and remove the knife.
Implementation Method 1
a near field communication device configured to determine a presence of an authorized user in a vicinity of the knife holder
Data Source
AI summary
A knife holder for holding a knife includes a block defining a cavity to receive the knife, and a casing removably arranged inside the cavity and adapted to be locked with the block. The knife is removably arranged inside the casing. A lock structure locks the casing with the block to prevent the removal of the casing from the cavity. Moreover, a switch is adapted to be actuated by a user to enable an unlocking of the casing from the block to enable a removal of the casing from the block. A near field communication device is configured to determine a presence of an authorized user in a vicinity of the knife holder and facilitates an unlocking of the casing from the block in response to an actuation of the switch in the presence of the authorized user in the vicinity of the knife holder.