Bar Lock Assembly with Telescopic Rod and Ergonomic Handle
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Solution Overview
Problem
Existing bar lock assemblies for storage containers are complex to manufacture, ergonomically challenging to operate, and prone to mechanical issues due to their two-piece design, requiring two hands to unlock and potentially causing damage when the door is closed.
Innovation Solution
A bar lock assembly with a telescoping lock rod and handle configuration that allows for one-handed operation, featuring a fixed arc pivot point and linkage that adjusts the handle's angle between 35° and 50° for improved ergonomics, and a hasp lock mechanism to secure the handle in position, preventing accidental rotation and maintaining the lock rod in the correct position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a two-piece lock rod design is used, then the lock rod can be manually retracted within the first portion to unlock the door, but the linkage includes multiple links and pivot points which add to manufacturing costs and complexity
Solution Approach 1:
The patent combines the handle and linkage into a single integrated component that pivots on a fixed axis. This merging eliminates the need for separate links and pivot points, reducing manufacturing complexity while maintaining the ability to manually retract the lock rod through the pivoting motion of the integrated handle-linkage assembly.
Solution Approach 2:
The integrated handle-linkage serves multiple functions: it acts as both the operating handle and the linkage mechanism for retracting the lock rod. This multi-functionality reduces the number of separate components needed, simplifying the overall structure while preserving the manual retraction capability.
2Device complexity
If the locking handle is disposed generally parallel to the ground in a locked condition, then the structure is simple, but the handle needs to be simultaneously raised above horizontal and rotated to unlock, requiring two hands and reducing ergonomics
Solution Approach 1:
The patent makes the handle position dynamic by allowing it to pivot through a range of motion. The handle can be positioned at various angles during operation, enabling the operator to optimize the angle for one-handed operation while maintaining structural simplicity. The fixed axis pivot allows continuous adjustment of handle orientation.
Solution Approach 2:
The patent changes the parameter of handle orientation from a fixed parallel-to-ground position to a variable angle position. By allowing the handle to pivot and be positioned at optimal angles during operation, the system improves ergonomics for one-handed operation while maintaining structural simplicity through the fixed axis pivot mechanism.
3Reliability
If the second portion of the lock rod is extended, then it can engage with the floor extension to secure the door, but nothing is provided to hold it in a retracted position, causing it to gravitationally fall and potentially cause damage
Solution Approach 1:
The patent applies preliminary anti-action by providing a stop mechanism that prevents the lock rod from gravitationally falling before damage can occur. The stop is positioned to intercept the lock rod portion during its downward motion, countering the gravitational force in advance and preventing harmful engagement with the door or floor extension.
Solution Approach 2:
The stop mechanism acts as a cushioning element that absorbs the gravitational energy of the falling lock rod portion. By positioning the stop beforehand, the system cushions the impact before it can cause damage to the door, floor extension, or lock rod components.
Data Source
AI summary
A bar lock assembly including a lock rod having first and second lock rod portions and defines a rotational axis. A second lock rod portion section telescopically extends from the first lock rod portion when the bar lock assembly is in a first condition. The second lock rod portion is substantially retracted within the first lock rod portion when the bar lock assembly is in a second condition. An elongated handle having opposed ends extends from the first lock rod portion. One handle end is pivotally connected to the first lock rod about a fixed axis. Linkage between the handle and the second lock rod portion telescopically moves the second lock rod portion. This lock bar assembly is configured such that an angle of about 45° is established between the handle and a generally horizontal plane when in the first position to enhance ergonomic operation of the bar lock assembly.