Rotary Lock Tray with Gravity Weight and Damping
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Solution Overview
Problem
Existing tray apparatuses in vehicles fail to effectively prevent trays from opening unexpectedly due to external shocks, falling short of user expectations in safety standards.
Innovation Solution
A tray apparatus with a rotary lock system, featuring a weight positioned above the hinge, an elastic member for holding, and a damping unit to control the rotation speed, ensuring the tray remains closed during external shocks and allowing for adjustable response time and high design freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotary lock system with weight and elastic member is added to prevent tray opening, then safety performance is improved, but device complexity increases
Solution Approach 1:
The rotary lock system employs dynamic elements including a weight that responds to acceleration forces and an elastic member that provides dynamic restoring force. The system transitions between locked and unlocked states based on dynamic conditions (normal operation vs. crash), allowing it to adapt its behavior to the operational context while maintaining safety performance.
Solution Approach 2:
The damping unit controls the rotation speed of the rotary lock, and the weight's position can be adjusted along the rotary lock to control response time. These parameter adjustments allow optimization of the system's performance characteristics without fundamentally changing the system architecture, balancing safety requirements with operational smoothness.
2Reliability
If a rotary lock system with damping unit is used to control rotation speed, then safety performance is improved, but device complexity increases
Solution Approach 1:
The damping unit acts as an intermediary element between the external shock and the rotary lock mechanism. It mediates the transmission of force by controlling the rotation speed, preventing sudden or excessive movement while still allowing the lock to respond appropriately to crash conditions. This intermediary function enhances safety by providing controlled response characteristics.
3Adaptability or versatility
If the weight position is made adjustable to control response time, then adaptability is improved, but device complexity increases
Solution Approach 1:
The adjustable weight position along the rotary lock creates a dynamic configuration capability. By changing the weight's position, the system's moment of inertia and response characteristics are modified, allowing adaptation to different safety requirements or application scenarios without redesigning the entire mechanism.
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 tray apparatus effectively prevents unexpected opening due to external shocks, providing superior safety performance and design flexibility by utilizing a rotary lock system with a weight, elastic member, and damping unit to manage shock-induced movements.
Implementation Method 1
a center of gravity of the rotary lock is positioned above the hinge portion
Implementation Method 2
an elastic member supplying elastic force to the rotary lock sufficiently enough to hold the rotary lock in the original position in the normal state
Implementation Method 3
a damping unit coupled to rotary lock to reduce rotation speed of the rotary lock when the external shock is applied to the rotary lock
Data Source
AI summary
A tray apparatus may include a housing, a tray slidably accommodated in the housing to be opened or closed, a rotary lock pivotally coupled to the housing at a hinge portion of the rotary lock and locking the tray to the housing when external shock is applied to the tray beyond a predetermined value, wherein a center of gravity of the rotary lock is positioned above the hinge portion, and a holding unit for holding the rotary lock in a normal state so that the rotary lock maintains an original position thereof.