Electronic Door Lock Assembly with Nested Wiring Protection
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Solution Overview
Problem
Conventional door lock systems face challenges in handling door handing and thickness adjustments, loose handles, security breaches, and environmental exposure, particularly in electronic systems.
Innovation Solution
The door lock system includes a toolless handing assembly for quick left/right handing adjustment, self-adjusting spindles for varying door thicknesses, secure wiring protection, efficient torque transmission, and sealed gaskets to prevent environmental exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fasteners are made accessible for wiring installation, then ease of installation is improved, but security against bypassing deteriorates
Solution Approach 1:
The patent implements a nested structure where the second housing is disposed within the first housing. The fasteners are accessible only from the second surface of the backplate, which is inside the first housing. This nesting arrangement allows installers to access fasteners through a controlled path while preventing external access to wiring components, thus maintaining both ease of installation and security against bypassing.
Solution Approach 2:
The patent introduces an intermediary structure (the second housing and backplate assembly) that mediates between the exterior environment and the interior wiring components. The backplate with its first and second surfaces acts as an intermediary barrier, allowing controlled access to fasteners while blocking direct access to power wires and actuators from the exterior side.
2Ease of manufacture
If wiring is made accessible for installation, then ease of installation is improved, but security against bypassing deteriorates
Solution Approach 1:
Power wires and data wires are nested within the second housing, which itself is nested within the first housing. This multi-level nesting ensures that wiring components are protected from external access while remaining accessible to installers through the controlled path of the backplate's second surface during the installation process.
Solution Approach 2:
The backplate and second housing serve as intermediary structures that separate the installation interface from the protected wiring components. Installers interact with the backplate's second surface for wiring connections, while the backplate and housing structures mediate to prevent direct access to these components from the exterior.
3Device complexity
If a single spindle is used, then device complexity is reduced, but reliability of lock body positioning deteriorates
Solution Approach 1:
The patent employs two spindles that exert equal and opposite forces on the lock body, creating a balanced positioning system. This counterbalancing arrangement ensures the lock body remains centrally positioned and stable within the door, compensating for any single point of failure or misalignment that might occur with a single spindle system.
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 universal installation, secure operation, and reliable performance across different door types and environments, enhancing security and functionality.
Implementation Method 1
a spring configured to bias the disc toward a first position
Implementation Method 2
The gasket is disposed within the exterior lock portion and seals against the outer spindle
Data Source
AI summary
A lock portion of an electronic door lock system includes a first housing and a second housing secured to a backplate of the first housing. The second housing is secured to a first surface of the backplate and only accessible from a second surface of the backplate. One or more wires are secured to the second housing in a service loop and connected to an actuator within the second housing.