Mortise Lock with Selective Handle Control
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Solution Overview
Problem
Mortise locks lack flexibility in functionality and user control, particularly in handling configurations for door handles and access control, which limits their adaptability to various security and access requirements.
Innovation Solution
A mortise lock system with a chassis, latch bolt, and dual door handles that allows for multiple operational states, enabling or disabling handle inputs to control the latch bolt's movement, along with a toggle assembly and link mechanism to manage input transfers between handles, providing customizable functionality and access control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mortise lock provides multiple operational states for handle inputs, then user control and adaptability are enhanced, but device complexity increases
Solution Approach 1:
The patent implements a dynamic configuration system where the functionality of door handles can be changed between different operational states (first state, second state, third state) allowing the lock to adapt its behavior based on user needs. This enables the same physical hardware to provide different access control patterns without requiring multiple different lock devices.
Solution Approach 2:
The mortise lock is designed to perform multiple functions through a single device by enabling different operational modes: permitting both handles to control the latch bolt, permitting only the first handle, or permitting only the second handle. This multi-functionality approach allows one lock to replace what would traditionally require multiple different lock configurations.
2Ease of operation
If a toggle assembly and link mechanism are added to manage input transfers, then handle input control is improved, but device complexity increases
Solution Approach 1:
The patent introduces a toggle assembly and link mechanism as intermediary components between the door handles and the latch bolt. These intermediaries manage the transfer of input from the handles to the latch bolt, enabling complex control logic (which handles can operate the latch) without requiring complex electronics or software. The mechanical intermediaries provide clear, reliable input routing.
3Reliability
If selective locking and unlocking of handles is enabled, then security and usability are improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the control functionality by providing separate door handles (first door handle and second door handle) that can be independently configured through the toggle assembly. Each handle can be assigned different permissions (first state, second state, third state) allowing selective control over which handles can operate the latch bolt. This segmentation enables flexible security configurations while using standardized manufacturing components.
Data Source
AI summary
A mortise lock is disclosed for securing a door. The mortise lock may includes a latch bolt, auxiliary bolt, and a deadbolt.