Remote Bank Box Unlocking with a Captive-Key Electromechanical Lock

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Solution Overview

Problem

Existing bank vault systems require manual intervention by bank employees to unlock and lock compartments, leading to high staffing costs and security risks, and retrofitting existing facilities with remote-controlled locking systems is impractical.

Innovation Solution

An electromechanical device is affixed to the exterior of bank compartments, integrating a permanently mounted key and using a wired network for power and communication, allowing remote control and eliminating the need for battery replacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a traditional mechanical locking system with two keys is used, then security is maintained through dual authentication, but personnel costs increase and security risks arise due to the need for employee accompaniment

Engineering Contradiction:
ImprovesecurityVSAvoidpersonnel costs
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent replaces the traditional mechanical locking system with an electromechanical locking system that uses electronic actuators (motorized mechanisms) to control the locking and unlocking of the safe door. This substitution eliminates the need for manual key operation by employees, reducing personnel costs while maintaining security through remote electronic control and dual authentication protocols.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The electromechanical locking system enables customers to independently operate the locking and unlocking mechanisms without requiring employee accompaniment. The system provides self-service functionality through customer-controlled keypads or biometric authentication, allowing them to lock and unlock safes autonomously while the system maintains security monitoring.

Inventive Principle:
Principle #25Self-service

2Ease of operation

If remote-controlled locking systems are installed in new facilities, then employee accompaniment is eliminated, but modernization of existing installations becomes impractical

Engineering Contradiction:
Improveunattended accessVSAvoidinstallation complexity
Core Design Contradiction:
Ease of operationVSEase of manufacture

Solution Approach 1:

The locking system is divided into separate modular components: an electromechanical locking mechanism that can be independently installed on existing safe doors, a control unit that interfaces with the existing mechanical lock, and a power supply system. This segmentation allows the electromechanical system to be added to existing installations without replacing the entire locking mechanism, making modernization practical while providing unattended access capability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The electromechanical locking mechanism is designed to work within and alongside the existing mechanical locking system. The electric actuator integrates with the current lock structure, nesting the new technology within the old infrastructure. This approach allows existing safes to gain remote control functionality without complete redesign or replacement.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Ease of operation

If battery-powered remote control devices are used, then unattended access is enabled, but device complexity and maintenance requirements increase

Engineering Contradiction:
Improveunattended accessVSAvoidpower supply requirements
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The electromechanical locking system is designed to accept multiple power supply configurations: it can operate from external power sources in permanently installed applications, or from rechargeable/battery power sources in portable applications. This multi-functionality in power supply acceptance reduces device complexity by using a standardized electromechanical mechanism that adapts to different power scenarios rather than requiring separate systems.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP4043678B1Electromechanical device for unlocking the lock of a bank deposit box
Publication Date: 2026.05.13 HESS SÉCURITÉ SA
  • EP4043678B1 patent drawingFigure 1A~1B
  • EP4043678B1 patent drawingFigure 2A~2B
  • EP4043678B1 patent drawingFigure 3

AI summary

The electromechanical device allows for the remote unlocking of a bank compartment lock, which is opened using two keys. The first key (41) is pivotally mounted within the electromechanical device, which is fixed to the bank compartment in such a way as to hold the key (41) captive in the lock. The electromechanical device is also capable of exchanging data with a remote control station via a wired network. This network also provides power to the electromechanical device and allows it to be controlled from the control station, switching it between a locked configuration in which the first key (41) is blocked and an unlocked configuration in which the locking mechanism associated with the first key (41) can be operated by rotating it.