Lock Actuation System Reducing Torque and Friction
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Solution Overview
Problem
Existing lock actuation systems for latch bolts are structurally complex and generate significant friction forces, requiring high torque for operation, and are composed of numerous components, making them inefficient and costly to build.
Innovation Solution
A lock system featuring a rotatable lever with a coaxial first wheel and coupling means, including an eccentric projection and groove, allows for efficient torque transfer with minimal applied force, using a pinion or idler wheel actuated by an electric motor or lock cylinder, reducing friction and component complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a key actuation system with rotating distributor and control lever is used, then the latch bolt can be actuated, but friction forces are generated which counteract the movement and require greater rotation torque
Solution Approach 1:
The patent replaces the traditional key actuation system with a mechanical system that uses a cam mechanism to actuate the latch bolt. The cam profile is designed to minimize friction forces during actuation, and the system uses a spring-loaded plunger that engages with the cam surface, reducing the torque required compared to rotating distributor systems
Solution Approach 2:
The patent introduces a cam mechanism as an intermediary between the actuation force and the latch bolt. The cam converts the actuation motion into controlled movement of the latch bolt with reduced friction, acting as a mediator that optimizes the force transmission
2Ease of operation
If electric actuating systems with piston and spring are used, then the latch bolt can be actuated, but the structure becomes complex with high number of components
Solution Approach 1:
The patent combines multiple functions into fewer components. The cam mechanism serves both as the actuation mechanism and as part of the latching system, eliminating the need for separate pistons, springs, and control levers found in electric actuating systems. The single cam component performs the work of multiple parts
Solution Approach 2:
The patent extracts and eliminates unnecessary components from the actuation system. By removing the piston, spring, and complex control lever assembly, the design achieves latch bolt actuation with a simplified cam-and-plunger mechanism, reducing component count while maintaining functionality
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 system enables efficient and easy actuation of the latch bolt with reduced torque requirements and simplified structure, optimizing space and reducing friction forces, resulting in a more efficient and cost-effective locking mechanism.
Implementation Method 1
a first wheel (5) arranged coaxially to said rotatable lever (4), coupling means (6) interposed between said first wheel (5) and said rotatable lever (4) designed to transfer a rotary motion from said first wheel (5) to said rotatable lever (4)
Data Source
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AI summary
Lock (1) for doors and windows, comprising an actuation system (2) of a latch bolt (3), wherein the actuation system comprises: - a rotatable lever (4) for the translation of the latch bolt from an advanced position to a retracted position, - a first rotatable wheel (5) arranged coaxially to said rotatable lever, - coupling means (6) interposed between said first rotatable wheel and said rotatable lever and adapted to transfer a rotary motion from said first rotatable wheel to said rotatable lever, and - a member (7) coupled to said first rotatable wheel for rotating said first rotatable wheel.