Geometric Lock Mechanism for Bump-Resistant Handle Blocking
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Solution Overview
Problem
Existing lock devices are vulnerable to manipulation through forces, torques, and vibrations, commonly known as bumping, which compromises their security.
Innovation Solution
A lock arrangement with a blocking element controlled by a control element via an intermediate element, configured such that when the control element is in a locked position, the first pivot is on one side of a plane including the control axis, and when unlocked, it moves to the opposite side, providing strong resistance against bumping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional blocking element is used to prevent handle rotation, then the lock provides basic security, but it remains vulnerable to manipulation through forces, torques, and vibrations (bumping)
Solution Approach 1:
The blocking element is designed to dynamically change its blocking characteristic based on the position of the control element. When the control element is in the locked position, the blocking element provides strong geometric blocking that resists bumping forces. When the control element moves to the unlocked position, the blocking element allows handle rotation. This dynamic adaptation resolves the contradiction by providing high security during locked state while enabling operation during unlocked state.
Solution Approach 2:
The invention introduces a new dimension of control by adding the control element that rotates around a control axis, which is separate from the handle's rotation axis. This additional degree of freedom allows the blocking element to be controlled in a different dimensional space, creating a geometric locking mechanism that resists bumping forces from the handle rotation direction while still allowing controlled operation.
2Reliability
If a geometrically locked mechanism with pivots and control elements is implemented, then resistance to bumping is significantly improved, but the device complexity increases
Solution Approach 1:
The blocking element serves as an intermediary between the control element and the handle. It translates the rotational position of the control element into corresponding blocking or unblocking states for the handle. This intermediary mechanism allows the system to achieve complex security functions through relatively simple geometric relationships between pivots and blocking surfaces, rather than requiring complex active control systems.
Solution Approach 2:
The geometric locking mechanism is designed to be self-regulating through the inherent geometry of the pivots and blocking surfaces. When the control element rotates to the locked position, the geometry automatically creates the blocking state that resists bumping forces without requiring additional sensors, actuators, or control systems. The mechanism serves itself through its geometric configuration.
Data Source
AI summary
A lock arrangement comprising an operating element including an engageable feature and arranged to be manually operated to rotate around a rotation axis between a closed position and an open position; and a blocking element arranged to adopt a blocked position, in which the blocking element engages the engageable feature and thereby prevents the operating element from being rotated from the closed position to the open position, and an unblocked position, in which the blocking element does not engage the engageable feature and thereby allows the operating element to be rotated from the closed position to the open position; wherein the engageable feature comprises a recess; wherein the operating element comprises a first side surface defining the recess and an outer surface, wherein the first side surface and the outer surface form an acute operating element angle; and wherein the blocking element comprises a hook arranged to engage the recess.