Mortise Lock Universal Mounting via Arcuate Slots
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Solution Overview
Problem
Mortise locks with complex structures are expensive and not easily adaptable for use on panic doors, which require fewer functions and direct mounting is often not feasible.
Innovation Solution
A simplified mortise lock design featuring a case with arcuate slots, a latch bolt with a retractor, a key-operable cylinder, a follower, and a locking plate mechanism that allows for easy conversion between locking and unlocking positions, enabling compatibility with both ordinary and panic doors without modification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mortise lock with complicated structure is utilized on an ordinary door to provide enhanced security and multiple functions, then security and functionality are improved, but device complexity and cost increase
Solution Approach 1:
The mortise lock is designed with a universal structure that can function on both ordinary doors and panic doors. The locking mechanism, latch bolt, retractor, and cylinder assembly form a core multi-functional unit that provides security for ordinary doors while allowing simplified operation for panic doors through optional handle configurations.
Solution Approach 2:
The mortise lock is divided into distinct functional modules: the case structure, latch bolt assembly with retractor, key-operable cylinder, and optional handle components. This segmentation allows the core locking mechanism to remain complex for security while allowing simplification for panic door applications by omitting or modifying certain components.
2Adaptability or versatility
If a mortise lock with complicated structure is used to provide multiple functions, then functionality is improved, but device complexity and cost increase
Solution Approach 1:
The lock body is designed as a universal platform that can serve both ordinary doors requiring secure locking and panic doors requiring easy egress. The same case, latch bolt, and retractor mechanism provide multiple functions depending on the handle configuration and application requirements.
Solution Approach 2:
The lock system allows dynamic configuration where the same core mechanism can operate in different modes. The connecting member and arcuate slots enable the lock to adapt between locked and unlocked states, and between different door types, by allowing movement and reconfiguration of components based on operational requirements.
3Ease of manufacture
If direct mounting of mortise locks on panic doors is attempted, then installation simplicity is improved, but compatibility and proper operation deteriorate
Solution Approach 1:
The mortise lock case is designed with universal mounting features including arcuate slots in the sidewalls that accommodate different door types. The same case structure can be mounted on both ordinary doors and panic doors, providing compatibility without requiring different lock bodies for different applications.
Solution Approach 2:
The lock design allows local modifications to suit different applications. The connecting member can be positioned in different arcuate slots to adjust the range of motion and engagement characteristics, allowing the same lock to be optimized for either ordinary door security or panic door egress requirements.
4Device complexity
If mortise locks are used on panic doors with fewer functions, then cost is reduced, but security and functionality deteriorate
Solution Approach 1:
The mortise lock provides a universal security solution that maintains reliable locking mechanisms for ordinary doors while offering cost-effective simplified versions for panic doors. The same core security components (latch bolt, retractor, cylinder) provide adequate security for panic doors without the need for additional complex features.
Data Source
AI summary
A mortise lock includes a case having first and second sidewalls. A follower plate is pivotably mounted in the case and actuatable by a key-operable cylinder to move a latch bolt from an extended position to a retracted position. A locking plate is moveable by the cylinder through transmission by a lever link between an unlocking position allowing movement of the latch bolt and a locking position not allowing movement of the latch bolt. The locking plate is active when a connecting member is slideably extended through a slot in the first sidewall and through an engaging hole of the lever link into another engaging hole in the follower. The locking plat is inactive when the connecting member is slideably extended through another slot in the second sidewall and engaged in the engaging hole of the follower and not engaged in the engaging hole of the lever link.