Mortise Door Lock Depth Adjustment Mechanism

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Solution Overview

Problem

Mortise lock systems for French doors face challenges due to varying rod distances from the door's lateral surface, requiring multiple inventory configurations to accommodate different mortise depths, which complicates installation and inventory management.

Innovation Solution

A mortise lock system incorporating a depth adjustment mechanism with an interface and joint allowing axial translation of an elongated member, enabling adjustment relative to the door's lateral surface, thereby accommodating various mortise depths with a single set of lock system components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple inventory configurations are maintained to accommodate different mortise depths, then all door configurations can be serviced, but inventory complexity and installation complexity increase

Engineering Contradiction:
Improveaccommodation of different mortise depthsVSAvoidinventory complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The lock system incorporates an adjustable mechanism that allows a single lock body to accommodate multiple mortise depths through depth adjustment. The adjustment feature enables the same lock unit to be configured for different door thicknesses and mortise depths, eliminating the need for multiple inventory configurations while maintaining universal compatibility across various door specifications.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The lock system employs dynamic adjustment capabilities that allow the depth configuration to be changed after installation. The adjustment mechanism enables field adjustment of the rod projection depth and lock engagement position, transforming a static lock into a dynamically adjustable one that adapts to different mortise depths without requiring different lock models.

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If multiple inventory configurations are maintained to accommodate different mortise depths, then all door configurations can be serviced, but installation time and selection process increase

Engineering Contradiction:
Improveaccommodation of different mortise depthsVSAvoidinstallation time
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

The lock system includes pre-configured adjustment mechanisms and depth setting features that are prepared during manufacturing. The adjustment components are pre-installed and ready for field configuration, allowing installers to quickly adjust the lock depth without complex assembly procedures. This preliminary preparation eliminates time-consuming on-site modifications and simplifies the installation process.

Inventive Principle:
Principle #10Preliminary action

3Device complexity

If a single lock system configuration is used for all mortise depths, then inventory is simplified, but proper engagement cannot be ensured for varying depths

Engineering Contradiction:
Improveinventory simplificationVSAvoidlocking engagement reliability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The lock system incorporates adjustable parameters including rod projection depth, lock engagement position, and mortise depth configuration. These parameters can be modified within a range to accommodate different door and mortise specifications while maintaining reliable locking engagement. The adjustment mechanism allows precise positioning of the rod and lock components to ensure proper engagement depth regardless of the underlying mortise dimensions.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS9518411B2Mortise door lock system
Publication Date: 2016.12.13 FERCO FERRURES DE BATIMENT
  • US9518411B2 patent drawing
  • US9518411B2 patent drawing
  • US9518411B2 patent drawing

AI summary

A lock system for a door comprises one or more elongated members adapted to translate axially in a door to be moved in and out of engagement into a lock catch of a door frame. A lock mechanism is received in a mortise of the door and having a handle actuatable to displace at least one driver in translation. A depth adjustment adaptor comprises a interface connected to the elongated member, with or without a joint with at least one degree of freedom connecting the interface to the driver to adjust a depth of the interface relative to the driver and to a lateral surface of the door to actuate the axial translation of the elongated member by movement of the driver.