Toggle Cam Latch Assembly for Rotational to Linear Motion
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Solution Overview
Problem
Existing latch assemblies lack an efficient mechanism to translate rotational force into linear motion for locking and unlocking systems, leading to cumbersome operation and potential mechanical issues.
Innovation Solution
A latch assembly that utilizes a toggle cam mechanism to transfer rotational force from a key or actuator to translation plates, enabling their extension and retraction to lock and unlock a housing, with a pivotally engaged toggle cam and detent cam system for smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional latch mechanism is used, then the structure is simple, but the operation is cumbersome and mechanical play is significant
Solution Approach 1:
The latch assembly employs a toggle cam mechanism that dynamically converts rotational motion into linear motion through a pivoting action. The cam surface geometry creates a dynamic force multiplication effect during the transition from unlocked to locked state, enabling smooth operation with reduced mechanical play while maintaining reasonable structural complexity.
2Productivity
If rotational force is directly applied to locking rods, then the mechanism is simple, but the translation of rotational to linear motion is inefficient
Solution Approach 1:
The toggle cam acts as an intermediary mechanism between the rotational input (key or actuator) and the linear output (translation plates). It efficiently mediates the conversion of rotational force into linear motion through its cam surface geometry and pivoting action, improving motion translation efficiency while adding only moderate complexity to the system.
3Reliability
If multiple translation plates are used, then the locking system is more reliable, but the mechanism becomes more complex and prone to wear
Solution Approach 1:
The latch assembly merges the functions of multiple translation plates into a coordinated system driven by a single toggle cam mechanism. This combining approach maintains reliable locking through multiple plates while reducing overall mechanism complexity and minimizing wear points by using a unified drive system rather than separate actuation mechanisms for each plate.
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 latch assembly effectively translates rotational movement into linear motion, enhancing the ease and reliability of locking and unlocking processes while reducing mechanical play and wear, thus improving the operational efficiency and structural integrity of the locking system.
Implementation Method 1
A rotatable cam is rotationally engaged to the lock assembly. By an operator manually turning the key, the rotatable cam is caused to rotate and to strike a toggle cam. The toggle cam is mechanically engaged to a first translation plate and a second translation plate. As the operator rotates the key, the toggle cam rotates, which extends and retracts both the first translation plate and the second translation plate
Implementation Method 2
The latch assembly includes a detent cam in a spring-loaded, movable engagement with the toggle cam
Data Source
AI summary
A latch assembly is described. The latch assembly includes a casing. The latch assembly provides for the transfer of rotational force to translation plates. The rotational force drives translation plates and extends the translation plates from the latch assembly. A first translation plate is mechanically engaged to the casing. A second translation plate is mechanically engaged to the casing. The latch assembly includes a key assembly including a rotatable cam. A toggle cam is pivotally engaged to the casing via a pivot axle, and rotating the cam contacts the toggle cam to extend or retract both the first translation plate and the second translation plate from the casing.