Inertia-Activated Locking Mechanism for Energy-Absorbent Tables
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Solution Overview
Problem
Conventional energy absorbent tables may unintentionally deform when subjected to minor impacts, such as passenger navigation, rather than only during significant inertial forces like sudden deceleration, which can lead to inadequate injury protection for passengers.
Innovation Solution
A locking mechanism comprising a central tube, first and second frames, a bearing, a weight, and a latch is employed, where the latch blocks the bearing's movement until a predetermined amount of acceleration or deceleration is applied, preventing unintended deformation and ensuring the table absorbs energy only during significant inertial events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the table is designed to be energy absorbent without a locking mechanism, then it can absorb energy during impact, but it may unintentionally deform during minor impacts such as passenger navigation
Solution Approach 1:
The locking mechanism is activated in advance before any impact occurs, maintaining the tabletop in a stable locked configuration during normal use and minor disturbances. The latch engages the bearing to prevent premature deformation, and only releases when sufficient inertial force is detected, ensuring the table is ready to absorb energy only when truly needed.
Solution Approach 2:
The locking mechanism transitions from a static locked state to an unlocked state dynamically based on the applied inertial force. The weight and latch system automatically responds to acceleration or deceleration forces, allowing the table structure to change its rigidity characteristics in real-time according to the operational conditions.
2Stability of the object's composition
If a locking mechanism is added to prevent unintended deformation, then tabletop stability is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is self-activating and self-regulating, using the inertial force from acceleration or deceleration itself to trigger the release of the latch. The weight component automatically responds to the applied force without requiring external sensors, control systems, or power sources, thereby maintaining simplicity while achieving the desired stability control.
Solution Approach 2:
The latch acts as an intermediary element between the bearing and the frame, providing a simple mechanical interface that either engages or disengages based on the applied force. This intermediary component allows the complex function of conditional locking/unlocking to be achieved through a simple mechanical arrangement rather than a complex control system.
3Stability of the object's composition
If the latch blocks bearing movement continuously, then unintended deformation is prevented, but the table cannot absorb energy during significant inertial forces
Solution Approach 1:
The latch applies a preliminary blocking action to prevent bearing movement and tabletop deformation during normal operation and minor disturbances. However, this blocking action is designed to be overcome when sufficient inertial force is applied, allowing the table to transition to an energy-absorbing state when truly needed for passenger safety.
Solution Approach 2:
The system changes its mechanical parameter (locked vs. unlocked state) based on the magnitude of applied inertial force. The latch engages under normal conditions to maintain stability, but disengages when the force exceeds a threshold determined by the weight and latch design, thereby enabling energy absorption during significant impact events.
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 locking mechanism effectively prevents unintentional deformation of the table, ensuring it absorbs energy only during substantial inertial forces like sudden deceleration, thereby enhancing passenger safety by maintaining the tabletop in a stable configuration until sufficient impact occurs.
Implementation Method 1
a weight coupled to the central tube, and a latch coupled to the weight. The latch blocks movement of the bearing away from the central tube until one of acceleration and deceleration of at least a predetermined amount is applied to the table.
Implementation Method 2
A locking mechanism may be installed in such a table that prevents unintended deformation of the tabletop that may occur, for example, when the passenger is navigating around or bumps into the table, but that releases when the table encounters an inertial force such as a sudden deceleration or acceleration.
Data Source
AI summary
A table and a method of locking a table are disclosed. The table includes a central tube. A first frame and a second frame are disposed on opposite sides of the central tube, a bearing is coupled to the first frame and the second frame, a weight is coupled to the central tube, and a latch is coupled to the weight. The latch blocks movement of the bearing away from the central tube until one of acceleration and deceleration of at least a predetermined amount is applied to the table.