Gravity Lock Bin Lid Mechanism for Accidental Opening
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Solution Overview
Problem
Existing collection bins with automatic lid opening mechanisms are prone to accidental opening due to animal tampering, wind, or collisions, leading to waste dispersal and operational inefficiencies.
Innovation Solution
A gravity lock mechanism for collection bins, featuring a latch and a latching mechanism with a plunger and lever system, which automatically locks the lid in the closed position when the bin is tilted and unlocks it when the bin is returned to an upright position, allowing for easy emptying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple lock is added to the bin, then the bin security is improved, but the lid cannot open automatically when the bin is tilted upside down
Solution Approach 1:
The latching mechanism transitions from a static locked state to a dynamic state that responds to bin orientation. The lever pivots between positions based on bin tilt, automatically engaging or disengaging the plunger from the latch accordingly. This dynamic behavior allows the lock to provide security in upright positions while automatically opening when the bin is tilted for collection.
Solution Approach 2:
The system changes its locking parameter based on bin orientation. When the bin is upright, the lever is in a first position where the plunger engages the latch, providing a locked state. When the bin is tilted, gravity causes the lever to pivot to a second position, disengaging the plunger and allowing automatic opening. This parameter change enables both security and automated opening functionality.
2Productivity
If the lid is made easily openable for efficient emptying, then the productivity is improved, but the bin becomes vulnerable to accidental opening by animals, wind, or collisions
Solution Approach 1:
The latching mechanism is designed to be dynamically responsive to bin orientation rather than providing a fixed locking state. In normal upright positions, the lever maintains engagement with the latch, providing secure closure. When the bin is tilted during emptying, the lever automatically pivots to disengage the latch, allowing the lid to open freely without requiring manual intervention or risking accidental opening from external forces.
Solution Approach 2:
The latching mechanism serves itself by using the bin's own motion and gravity to automatically lock and unlock. The lever and plunger system responds autonomously to changes in bin orientation, locking the lid when upright and unlocking when tilted, without requiring external control systems, manual operation, or additional energy input. This self-service mechanism ensures both security and ease of emptying.
3Extent of automation
If a latching mechanism with lever and plunger is implemented, then the automatic locking and unlocking functionality is improved, but the device complexity increases
Solution Approach 1:
The latching mechanism is designed to be self-actuating, using the bin's own weight and gravity to power the locking and unlocking actions. The lever pivots automatically under gravitational force when the bin is tilted, causing the plunger to engage or disengage from the latch without requiring motors, sensors, control systems, or external energy sources. This self-service approach achieves automation while keeping the mechanism relatively simple.
Solution Approach 2:
The invention extracts the essential function of automatic locking from complex electronic or motorized systems and implements it through a simplified mechanical lever-plunger mechanism. By removing unnecessary complexity and focusing on the core gravitational actuation principle, the design achieves automatic locking functionality with minimal components, reducing overall device complexity while maintaining automation.
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 gravity lock mechanism effectively prevents accidental opening of the bin lid during handling or tilting, ensuring secure containment of waste while allowing for efficient emptying by automatically unlocking the lid when the bin is tilted upside down.
Implementation Method 1
a center of gravity of the lever is spaced apart from the lever pivot axis so that a torque is exerted about the lever pivot axis when the bin is positioned upside down
Implementation Method 2
the cam surface abutting against the base at the cam first location when the lever is in the first position, and the cam surface abutting against the base at the cam second location when the lever is in the second position
Implementation Method 3
the plunger selectively movable between extended and retracted positions, wherein, with the lid in the closed position, in the extended position, the plunger engages the latch so that the lid is prevented from pivoting relative to the body
Data Source
AI summary
A lock for a bin including a body and a lid hinged to the body. The lock includes a lever mounted to the lid and a plunger movable by the lever. The plunger is configured to engage a catch mounted to the body when the lid is closed and the lever is in a first position. When the lever is moved to a second position, the plunger is moved to disengage the catch and the lid is allowed to open.