Multipoint Lock Elliptical Gear Mechanism
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Solution Overview
Problem
Multipoint locks require multiple actuation steps and higher force or torque compared to single-point locks, leading to user confusion and operational difficulties.
Innovation Solution
A multipoint lock design featuring a horizontally translating lock bolt, vertical translating lock bolts, a linkage, and an elliptical gear mechanism that provides a mechanical advantage through a changing gear ratio drive, allowing for smooth and low-force operation via a single rotational mechanism like a thumb turn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple actuation steps are used to operate the multipoint lock, then secure locking is achieved, but user confusion and operational complexity increase
Solution Approach 1:
The patent combines the latch actuation and lock bolt actuation into a single integrated mechanism. When the user operates the handle, it simultaneously actuates both the latch and the lock bolts through a shared actuation path, eliminating the need for separate actuation steps and reducing user confusion while maintaining secure locking.
Solution Approach 2:
The handle mechanism is designed to perform multiple functions: it can retract the latch, actuate the lock bolts, and control the entire locking sequence through a single operation. This multi-functional design allows one component to replace what would traditionally require multiple separate actuators, simplifying the user interface while maintaining comprehensive security control.
2Reliability
If traditional multipoint lock mechanisms are used, then multiple locking points are secured, but higher force or torque is required for actuation
Solution Approach 1:
The patent employs a dynamic actuation sequence where the latch retraction and lock bolt actuation are coordinated through a single handle operation. The mechanism dynamically adjusts the force distribution throughout the locking sequence, allowing the user to apply moderate force that is amplified and distributed through the mechanical linkage to actuate multiple lock bolts simultaneously, rather than requiring high force on a single actuator.
Solution Approach 2:
The patent introduces a mechanical linkage system that acts as an intermediary between the user's handle operation and the lock bolts. This linkage mechanism translates and distributes the user's input force efficiently to multiple lock bolts, reducing the direct force requirement on the user while maintaining secure locking at multiple points.
3Ease of operation
If a single rotational mechanism is used to actuate the lock, then ease of operation improves, but the gear mechanism must provide mechanical advantage
Solution Approach 1:
The patent replaces complex electronic or multi-component actuation systems with a mechanically efficient gear mechanism. The gear system is designed to provide the necessary mechanical advantage through pure mechanical means, allowing a simple rotational input from the handle to be transformed into the coordinated actuation of multiple lock bolts, maintaining operational simplicity while managing the complexity through elegant mechanical design.
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
Enables intuitive and efficient operation with reduced force input, providing consistent weather performance and simplified actuation from unlocked to locked positions.
Implementation Method 1
an elliptical gear mechanism configured to increase force input by the user to the input mechanism progressively when transitioning from the unlocked position to the locked position
Data Source
AI summary
Various aspects of the present disclosure are directed toward apparatuses, systems, and methods that include a multipoint lock. The multipoint lock may include a horizontally translating lock bolt and at least one vertical translating lock bolt. In addition, the multipoint lock includes a linkage coupled to and configured to translate the horizontally translating lock bolt and the at least one vertical translating lock bolt. Further, the multipoint lock includes a gear mechanism configured to actuate the linkage and to effect translation of the horizontally translating lock bolt and the at least one vertical translating lock bolt.